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High Temperature Performance Coatings for Strength and Durability

The Next Generation of Coatings...

VICOTETM Coatings, powder and liquid dispersions, based onVICTREXTM PEEK polymer offer exceptional scratch and wearresistance, high temperature performance, strength anddurability.

Eco-friendly VICOTE Coatings were developed to fill theperformance gap found in many existing coatingtechnologies today. Whether applied to industrial,automotive, food processing, semiconductor, electronicsor pharmaceutical parts, VICOTE Coatings are a greatchoice for engineers looking to improve the wearperformance and life of the coated part in theirapplications. VICOTE Coatings can be applied usingelectrostatic or conventional dispersion spray techniques.

The main ingredient of VICOTE Coatings is VICTREXTM PEEK polymer, a linear,aromatic, semi-crystalline thermoplastic, widely regarded as one of the highestperforming thermoplastic materials in the world. It offers a unique combination of properties to help processors and end-users reach new levels of cost savings,performance, and product differentiation.

VICOTE Coatings, as well as VICTREX PEEK polymer, are products manufactured byVictrex plc, a global manufacturer of innovative high performance materials. Withproduction facilities based in the UK andbacked by sales and distribution centers servingmore than 30 countries worldwide, Victrex’sglobal market development, sales and technicalsupport services work hand-in-hand withcustomers offering practical assistance in theareas of processing, design, and applicationdevelopment and training.

VICOTETM High Temperature Performance Coatings2

s Very Good Barrier Properties – canbe used as an effective barrier againstmany liquids and gasses. The barrier properties will depend on the servicetemperature, pressure and coatingthickness as well as the concentrationof the chemicals. A dry film thickness(DFT) of 100 microns of VICOTECoatings should be used as a minimum.

s Low Specific Gravity – greater coverage than fluoropolymers.

s Low Outgassing and Extractables –where high purity and low contami-nation levels are key requirements.

s RoHS Compliance – the majority ofgrades comply with European RoHS(Restriction of Hazardous Substances)legislation that restricts the use ofsix hazardous materials found in awide range of products includingelectrical and electronic products.

Key Benefits s Exceptional Abrasion Resistance –very hard, tough, and scratch resistant.

s Excellent Mechanical Properties – including wear, creep and cutthrough resistance. Extremelydurable at high temperatures.

s Excellent Wear Surface – an excellentwear counterface to hard surfaceslike steel and ceramics. Non-gallingwith low particulation and non-sloughing.

s Good Lubricity – offers a smoothand uniform surface.

s High Load Bearing Surface – one ofthe strongest thermoplastic coatingson the market. Very resistant to creepand flow caused by compression.

s Excellent Radiation Resistance –VICOTE 700 grades exhibit excellentradiation resistance. Can withstandhigh doses of Gamma radiation (> 109 Rads) without embrittlement.

s High Temperature Performance –one of the highest performing polymers available where continuoushigh temperature performance up to260°C (500°F) is required. Withstandslead-free soldering temperatures.VICOTE 708 and 709 grades are based on VICTREX HT™ for even highertemperature performance up to280ºC (550ºF) and enhancedmechanical properties.

3VICOTETM High Temperature Performance Coatings

s Eco-Friendly – majority of dispersiongrades are aqueous (water) basedand are formulated to contain someof the industry’s lowest levels ofvolatile organic compounds (VOCs).

s Very Good Chemical Resistance –insoluble in all common solvents.Excellent resistance to acids, bases,hydrocarbons, salts and steam.

s One-Coat System – no primerrequired with proper substrate pre-treatment.

s Good Electrical Insulative Properties– very stable electrical insulative properties over a wide range of temperatures, frequencies andhumidities

s Halogen Free, Low Smoke andToxicity – select grades are inherentlyUL V-O materials at 1.5 mm (.06 in).VICTREX PEEK polymer is classified as halogen-free according to the definition in IEC 61294-2-21.

s Ease of Processing – process temperatures between 380°C to420°C (716°F to 788°F).

s FDA Compliance – the majority of VICOTE grades can be used in environments involving food contact.

s Low Moisture Absorption andExcellent Hydrolysis Resistance –properties are unaffected by exposureto water, humidity and steam.

...For Durability and Long Life

VICTREX® PEEK VICOTE® GRADES CERTIFICATE OF COMPLIANCE WITH FDA REGULATION 21 CFR 175.300 RESINOUS AND POLYMERIC COATINGS.

Materials and articles manufactured from VICTREXTM PEEK VICOTETM grades 701, 702, 703, 704, 705, 706, 707, 708 and 709 comply with the compositional requirementsof regulation 21 CFR 175.300 for resinous and polymeric coatings of the Food and Drug Administration (FDA) of the United states of America. Regulation 21 CFR175.300 further specifies that the finished coated part, which is in contact with food, is subject to extractive limitations. Compliance with any applicable extractive limitscan only be demonstrated by testing carried out on the finished article.

Materials and articles manufactured from VICTREXTM PEEK VICOTETM grades 804, 804 Blk, F804, F804 Blk, 805, F805, 806, F806, 807 Blk, F807 Blk, 808, F808, 809, F809, 810 Blk, F810 Blk, F815 and F816 Blk comply with the compositional requirements of regulation 21 CFR 175.300 for resinous and polymeric coatings of the Food andDrug Administration (FDA) of the United states of America. Regulation 21 CFR 175.300 further specifies that the finished coated part, which is in contact with food, is subject to extractive limitations. Compliance with any applicable extractive limits can only be demonstrated by testing carried out on the finished article.


Applications

Industrial & Automotive

s Chemical processing and transportcomponents

s Vessels, pipes, valves, and ball seatss Industrial mixers and agitatorss High performance washerss Compressor componentss Rollers and bearingss Moldss Textile manufacturing

Food Processing

s Industrial bakewares Processing beltss Cutting equipment

Semiconductor & Electronics

s Equipment componentss Ultra-pure water systemss Circuit substratess Mobile phone sliders

Pharmaceutical

s Process tanks

Consumer

s Cookware s Appliancess Exercise equipment

Food Processing BeltsTaconic International uses VICOTECoatings in its Tacmaster range of foodprocessing belts used in aggressive foodcooking environments where excellentwear, release and mechanical properties,and excellent temperature performanceare required.

The coated belts provide increased wear and abrasion resistance, improvedcut-through resistance, increased puncture and impact resistance as well as non-stick properties. When theseproperties are combined with improveddimensional stability, resistance to oilsand grease, and continuous tempera-ture resistance up to 260°C (500°F) thebelt’s life can be increased by up to40%, reducing both downtime andmaintenance costs for our customers.

Rice CookersCuckoo Industrial chose VICOTE Coatingsas a major ingredient for a new coatingformulation for its range of high-pressure rice cookers.

The vulnerability to fast corrosion of theinner aluminum pot was the motivationbehind developing a new coating material with high abrasion protectioncharacteristics. Cuckoo also wanted toimprove durability, as many food-standardcoatings can be scratched by the frequentuse of rice scoops and scrubbers. Cuckoofound that PTFE, PFA, and FEP are allfairly vulnerable to scratches and/orabrasion, and therefore simply don’t last long in these very demanding applications.

VICOTE Coatings were chosen becauseof their remarkable mechanical performance at high temperatures,superb heat and abrasion resistance,and corrosion resistance.

Wear PlatesAdvanced Mechanical Technology, Inc.(AMTI) chose VICOTE Coatings to coatan aluminum wear plate for its newdual belt instrumented treadmillbecause of the coating’s superior friction and wear properties.

AMTI was experiencing problems withwearing underneath the belt surface. Itexperimented with different materials.After loading, testing and wearing outsamples of other materials in minutes,the sample coated with VICOTE Coatingwas tested. After a few minutes it didnot heat up so AMTI kept the test goingfor over an hour. After this length oftime without any degradation, AMTIstopped the test and decided VICOTECoating was the solution.

The dual design instrumented treadmill is a first for AMTI. It features two side-by-side rolling belts. One is two feetwide and the other is one foot wide. It uses digital amplifiers with Ethernetdata acquisition for human performanceresearch. 3-D forces and torques on each foot can be collected during walking or running.


Industrial TextileProductionRollers used in industrial textile produc-tion must withstand high temperaturesas well as aggressive chemical and abrasive conditions. When coated withVICOTE Coatings, rollers last 4 timeslonger than the same rollers coated with PTFE.

VICOTE Coatings offer excellent hightemperature performance — continuoususe at temperatures up to 260°C (500°F)— and very good chemical resistance.They retain their mechanical propertiesat elevated temperatures and provideexceptional wear and abrasion resistance,as well as excellent durability.

Metal Plating Replacedby VICOTE Coatings inNeedle Roller BearingsRoller bearings are widely used incrankshaft and connecting rod mechanisms in engines especially inmotorcycles, lawnmowers, and outboard motors. Their purpose is toreduce the friction between two rotating surfaces. As a result, they aresubject to extreme wear especially ofthe outer surface.

Current solutions are expensive and do not provide adequate wear relativeto the demands of the application.However, the excellent wear resistanceand durability of VICOTE Coating canwithstand the extreme conditions ofthis application.

When tested at 9000 rpm for 100hours, VICOTE Coatings outperformedcurrent solutions such as traditional silver/copper plating, which wears awayunder the same test conditions causingdamage to the cage and prematurefailure of the bearing. This perform-ance was achieved with a VICOTECoating thickness 50% lower than thetraditional silver/copper plating.

MoldsVICOTE Coatings are an excellent choicefor the coating of mold tools in theapplications listed below. With a combination of good release propertiesand wear resistance, especially at elevated temperatures, VICOTE Coatingshave been shown to outperform traditional fluoropolymer coatings inmold applications. For example, in acoated shoe mold application, VICOTECoatings lasted over 30 times longerthan the same mold coated with PTFE.

Applications• Tire molds• Lozenge molds• Shoe molds• Cookie molds• Composite parts• Chocolate and candy molds• Pharmaceutical molds (for pills)

Mold Substrates• Steels• Aluminum

Global ApplicationDevelopment Services Victrex has two state-of-the-art application prototyping facilities tosupport OEMs and coaters with thedevelopment and commercializationof VICOTE Coatings in their applica-tion design. The Asia Innovation andTechnology Center (AITC) is located in the Xinzhuang Industry Park inShanghai, China and the VICOTECoatings Application DevelopmentCenter (VADC) is located at Victrexheadquarters in Thornton Cleveleys,Lancashire, United Kingdom. Bothcenters provide customers withexpertise and support in materialsspecification, training, prototyping,testing, and research.


VICOTE 700 Series

VICOTE 700 Series powder grades can be used for electrostatic coating and thermal spraying. The grade required willdepend on the coating thickness required, the geometry of the part and the temperature requirements.

VICOTE 700 Series Powder Grades

Nomenclature D50 Particle Size Description

VICOTE 701 50 micron Used electrostatically where heavy coating thickness are desired and

where machining to tolerance may be required.

VICOTE 702 50 micron Used electrostatically where increased flow and thinner coatings are

desired. First choice for thin electrostatic coatings with good melt flow.

VICOTE 703 23 micron Can be used electrostatically and/or in formulation of liquid dispersions.

VICOTE 704 10 micron Used in formulation of liquid dispersions.

VICOTE 705 50 micron Used electrostatically where higher flow is required. First choice for

thinnest electrostatic coatings with highest melt flow.

VICOTE 706 23 micron Can be used electrostatically where higher flow and thinnest coatings

are required.

VICOTE 707 10 micron Used where the high flow is required in formulation of liquid dispersions.

VICOTE 708 10 micron Used where higher temperature performance is required in formulation

of liquid dispersions

VICOTE 709 50 micron Used electrostatically with higher temperature performance requirements.

Note: The 50 micron powders should be the first choice for electrostatic application.

Polymer Abrasion Outgassing No Cold ReleaseResistance and Extractables Flow (Coeff.of Friction)

Grade Dependent

VICOTE Coatings Excellent Excellent Excellent Very Good

PTFE-Based Poor Fair Poor Excellent

ECTFE-Based Poor Good Poor Good

PFA-Based Poor Excellent Poor Excellent

Polymer Mechanical Chemical Heat Smoke / RadiationProperties at Resistance Resistance Toxicity ResistanceElevated

Temperatures

VICOTE Coatings Excellent Very Good Excellent Excellent Excellent

PTFE-Based Poor Excellent Excellent Poor Poor

ECTFE-Based Poor Excellent Good Poor Poor

PFA-Based Poor Excellent Excellent Poor Poor

VICOTE Coatings — Property Comparison with Fluoropolymer Coatings


VICOTE 800 Series

VICOTE 800 Series Liquid Dispersions

Nomenclature DescriptionVICOTE 804 & F804 & 804 Blk* & F804 Blk* A range of pure VICTREX PEEK dispersions with typical properties being high

continuous use temperature of 260°C (500°F), excellent wear, abrasion and cut through resistance at these high temperatures combined with very good chemical and excellent radiation resistance. Available in natural and black.

VICOTE 805 & F805, 806 & F806, and These grades have been specifically formulated to provide a tough, resilient, high807 Blk* & F807 Blk* wear resistant coating with varying levels of lubricants to give good release

properties. Available in natural and black.VICOTE 808 & F808, 809 & F809 and These grades have been specifically formulated to provide a resilient coating with810 Blk* & F810 Blk* varying levels of lubricant to give high wear and abrasion resistance combined

with very good release properties. Available in natural and black.VICOTE 811 The 811 grade has been specifically formulated to provide a tough, resilient

coating with high wear and abrasion resistance combined with dry lubrication properties.

VICOTE 812* The 812 grade has been specifically formulated to provide a tough coating with good wear and abrasion resistance.

VICOTE F815 & F816 Blk These grades have been specifically formulated to provide a resilient coating with high wear and abrasion resistance combined with very good release properties throughout the profile of the coating. Available in natural and black.

* Electrostatic dissipative (ESD) grades. All other grades are Insulative coatings.

Electrostatic Dissipative (ESD) GradesESD grades available as part of the range of VICOTE Coatingscan effectively help to control the rate of electrostatic chargebuild-up, which is of particular importance in hazardous-areaindustrial applications, as well as the manufacture of sensitiveelectrical and semiconductor equipment.

VICOTE 800 Series liquid dispersions are available where thinner coatings are required, where difficult geometries must becoated, and in instances where enhanced properties such as release are required.

F-GradesF-Grades of VICOTE Coatings are specially formulated byVictrex to solve the problem of flash rusting that can occurwhen water-based coatings are applied to ferrous metalssuch as mild steel. Can also coat non-ferrous substrates equally effectively.


Performance

VICOTE Coatings Performance Characteristics

Lubricity Low coefficient of friction. VICOTE dispersions are available containing lubricants to further improve the coefficient of friction. Will not gall metals.

Abrasion Resistance Four times the wear resistance of fluoropolymers. Virtually no particle sloughing.

Scratch Resistance Excellent scratch resistance compared to other polymers.

Mechanical Properties Mechanical strength exceeds that of all fluoropolymers.

Heat CUT Resistance For use up to 260°C (500°F).

Electrical Insulation Consistent over wide range of temperature, frequency, and humidity.

Chemical Resistance Inert in most chemical environments. Not affected by steam. Low moisture absorption.

Purity Extremely low extractables. Great in deionised water and food contact.

Adhesion Excellent adhesion to the substrate negating the need for a primer during the coating process for reductions in systems costs.

Wea

r In

dex

25

20

15

10

5

0

Competitor B

Competitor A

Competitor C

Competitor D

Competitor E

VICOTE 807Blk

VICOTE 805

VICOTE 804

VICOTE 810Blk

Figure 1: Taber Abrasion Comparing VICOTE Coatingsagainst high end industrial competitive coating systems atroom temperature.

Min

utes

250

200

150

100

50

0

Competitor B

Competitor A

Competitor C

Competitor D

Competitor E

VICOTE 808

VICOTE 809

VICOTE 810Blk

VICOTE 806

VICOTE 807Blk

Figure 2: Comparison of VICOTE Coatings with high endindustrial competitive coating systems. Time to wearthrough 25 microns with 250N load at room temperature.

Min

utes

60

50

40

30

20

10

0

Competitor C

Competitor B

Competitor D

Competitor A

Competitor E

VICOTE 808

VICOTE 805

VICOTE 810Blk

VICOTE 809

VICOTE 807Blk

Figure 3: Comparison of VICOTE Coatings with high endindustrial competitive coating systems. Time to wearthrough 25 microns with 250N load at 250°C (482°F).

Scra

tch

Dep

th in

Mic

rons

80

70

60

50

40

30

20

10

0

VICOTE 809

VICOTE 804 Treated

VICOTE 804

VICOTE 810 Blk

VICOE 805

VICOTE 808

VICOTE 807 BlkPPS

ETFE PFAPVDF

PTFE

OXPEKKECTFE FE

P

Figure 4: Tallysurf Scratch Resistance of VICOTE Coatingscompared with various other coating materials with a loadof 6kg at room temperature.

Taber Abrasion test carried out to ASTM D 4060 Tests were carried out by The National Tribology Centre, using aCameron Plint wear test rig.

Tests were carried out by The National Tribology Centre, using aCameron Plint wear test rig.

Scratch depth was determined using a Form Tallysurf Intra MeasuringInstrument. A stylus is pulled over the scratch and a reading of the surface roughness can be measured. The Pv (peak valley) is also shown, this a measure in µm of the lowest valley present in the measured coating.


Property Conditions Standard Unit VICOTETM VICOTETM VICOTETM 708,709 701 702,703,704, 705, 706, 707 (VICTREX HT™)

GeneralCoating Finish Color Grey/Tan Grey/Tan Grey/Tan(not powder color)Solid Density Crystalline ISO 1183 g/cm3 1.3 1.3 1.3MechanicalAbrasion Resistance Taber CS 10 wear index 4.8 4.8Coefficient of Friction 250N load ASTM G133-05 — 0.37 0.37 Dynamic Water Absorption 23°C (73°F), ISO 262A % 0.07 0.07 0.07

24 hoursThermalMelting Point DSC °C (°F) 343 (649) 343 (649) 372 (701)Stoving Temperature Object Temp. — °C (°F) 380 - 420 380 - 400 400 - 420

(716 - 788) (716 - 752) (752-788)Specific Heat Capacity DSC 2.16 2.16 Max. Use Temperature °C (°F) 260 (500) 260 (500) 280 (550)-Continuous Fire, Smoke & ToxicityLimiting Oxygen Index 0.4 mm ISO 4589 % oxygen 24 24 24UL Flammability Test Electrical UL 94 — V 0 V 0 V 0Specific Optical Density 3.2 mm ASTM E662 — 19 19 (Ds) FlamingElectricalDielectric Constant 50 Hz, 0-150°C IEC 250 — 3.2 3.2 Dielectric Strength 50µm film IEC 248 kV/mm 190 190 Loss Tangent 23°C (73°F), IEC 112 0.003 0.003 0.0035

1MHzVolume Resistivity IEC 93 1016

Ω cm 4.9 4.9 4.9

Typical Properties of VICOTE 700 Series Powder Coatings

Properties

Figure 5: Coefficent of Friction of VICOTE Coatings compared with other polymers.

Figure 6: Contact Angle after 8000 Taber Cycles at 1kg loadfor the F815 and F816 Blk Grades.

PTFEFEP

VICOTE 805

Coef

fici

ent

of F

rict

ion

ETFE PPSPFA

ECTFE

VICOTE 804

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

VICOTE 808

140

120

100

80

60

40

20

0

Initial 0-1000 Cycles 1000-5000 Cycles 5000-8000 Cycles

This test was carried out to ASTM G133-05 using a Plint TE test rig with10 mm flat slider at 20 Hz and 11 mm stroke (22 mm total) at 50N load.

SFE (surface free energy) was measured using water anddiiodomethane at room temperature.

For a more comprehensive list of VICOTE 700 Series data properties by grade, please contact a Victrex representative.


Typical Properties of VICOTE 800 Series Liquid Dispersions

Typical Properties of VICOTE 800 Series F-Grade Liquid Dispersions

Typical Property Conditions Standard Unit 804 804Blk 805 806 807Blk 808 809 810Blk 811 812Appearance off white black off white off white black off white off white black grey grey% Solids Weight Internal Test % 37.40 36.70 37.39 37.5 36.90 37.40 37.40 36.70 41.3 37.5Viscosity 25°C (77°F) ISO 6 BSEN ISO 2431 32.00 25.00 26.00 19 17.00 29.00 23.00 22.00 54 22S.G. ISO 2811 25°C (77°F) ISO2811 g/cm3 1.09 1.09 1.10 1.12 1.12 1.10 1.12 1.12 1.13 1.17Melting Point DSC °C (°F) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649)CUT °C (°F) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500)Direct Impact 25°C (77°F) ISO 6272 1m/1kg/ 1 1 1 1 1 1 1 1 1 1

Indent 5mmKonig Hardness ISO 1522 Seconds 200 205 145 130 140 170 125 120 190 170Bend ISO 6860 mm Passat3.2 Passat3.2ESD EOS/ESD-S11 Ohms-cm 1x10E7 1x10E6 1x10E6 1x10E6

Typical Property Conditions Standard Unit F804 F804Blk F805 F806 F807Blk F808 F809 F810Blk F815 F816BlkAppearance off white black off white off white black off white off white black off white black% Solids Weight Internal Test % 37.40 36.70 37.39 37.5 36.90 37.40 37.40 36.70 37.32 37.05Viscosity 25°C (77°F) ISO 6 BSEN ISO 2431 20.00 20.00 39.00 12 19.00 27.00 25.00 12.00 20 18S.G. ISO 2811 25°C (77°F) ISO2811 g/cm3 1.09 1.09 1.10 1.12 1.12 1.10 1.12 1.12 1.09 1.11Melting Point DSC °C (°F) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649) 343(649)CUT °C (°F) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500) 260(500)Direct Impact 25°C (77°F) ISO 6272 1m/1kg/ 1 1 1 1 1 1 1 1 1 1

Indent 5mmKonig Hardness ISO 1522 Seconds 200 205 145 130 140 170 125 120 122 116Bend ISO 6860 mm Pass at 3.2 Pass at 3.2ESD EOS/ESD-S11 Ohms-cm 1x10E7 1x10E6 1x10E6

For a comprehensive list of VICOTE 800 Series data properties by grade, please contact a Victrex representative.

Note: Fluoropolymer data obtained from material supplier published data sheets

Properties

PROPERTY VICTREX PEEK VICTREX HT PTFE PFA ECTFE

Melting Point °C (°F) 343 (649) 372 (700) 327 (621) 310 (590) 245 (473)

Continuous Use Temperature °C (°F) 260 (500) 280 (536) 260 (500) 260 (500) 150 (302)

Tensile Strength MPa (ksi) 100 (14.5) 100 (14.5) 14-35 (2.03 - 5.07) 28-31 (4.06 -4.49) 49 (7.10)

Tensile Modulus Gpa (ksi) 3.5 (507) 3.5 (507) 0.55 (79.7) 0.78 (113) 1.65 (239)

Flexural Modulus Gpa (ksi) 4.0 (580) 4.0 (580) 0.45 (65) 0.67 (97) 1.7 (246)

Hardness (Shore D) D85 D85 D50-D55 D60 - 64 D55 -75

Compressive Strength Mpa (ksi) 118 (17.1) 118 (17.1) 12 (1.74) 11 (1.59)

Specific Gravity 1.3 1.3 2.1 -2.2 2.1 -2.2 1.7

VICTREX PEEK Polymer Compared with Fluoropolymers


Coatings ProceduresVICOTE 700 Series Electrostatic Powder Coatings

This surface is free of all oil, grease,dirt, mill scale, rust, corrosion products,oxides, paint, and other foreign matter. Residual dust from blasting should beblown off with clean, dry air. It is alsorecommended that, if possible, a lightcleaning with a suitable solvent begiven as the final preparation step. All possible care should be taken toavoid deposition of lint on the part. Do not use paper towels.

At this stage, all precautions should betaken to avoid handling the part withbare hands. Use clean latex gloves or,preferably, tongs.

Drying

It is recommended that VICOTECoating powders be dried in an aircirculating oven at 150°C (302°F) for 3 hours or 120°C (248°F) overnightbefore use.

Coating with powder

To apply VICOTE Coatings evenly, flow out the coating at 380-420ºC(716–788ºF) part surface temperature.The time required to flow out thepowder into a uniformly glossy fluidcoat will depend upon the thermalmass, size and shape of the part aswell as the oven temperature.However, the oven temperature should never be below 360°C (680ºF).Flow out is indicated by a wet glossysurface with no “orange peel”appearance.

It is not advisable to use too high anoven temperature as some sections ofthe part may heat up faster thanothers and lead to problems of pullback, dripping or degradation. Hotand cold spots in the ovens can alsolead to such problems especially if toohigh oven temperatures are used.The parts should be rotated in both

Electrostatic equipment

VICOTE 700 Series powder coatings canbe used in conventional electrostaticcoating equipment either in manual orautomatic powder booths using anegative Corona charge. The fluidizingunit should be capable of providing asteady stream of powder to the gunwithout slugging. The gun, powderdelivery lines and fluidizing unit shouldbe completely stripped and cleaned toremove all vestiges of other powdersprior to charging the system withVICOTE Coatings, otherwise coatingdefects such as black specks, pin holes,and craters will be evident in thefinished coating surface. Thecompressed air supply to the unitshould be filtered and dried to removeany contaminants from the compressor.Powder recovered from the unit shouldbe contamination free and may needto be mixed with virgin powder toadjust the particle size of the bulkpowder as coarse particles will bedeposited preferentially to the partsundergoing coating.

Preparation of the part/substrate

It is important that the part/substratebe prepared properly in order to gainthe full advantage of a VICOTECoating. Remove all sharp edges onthe metal surfaces. A minimum of 1⁄4"radius on corners is recommended ifthe part design can accommodate.Deburr and smooth all welds to avoidstress concentration and pin holes inthe coating.

Removal of old coatings

It is essential that all previous coatings,oil, grease and other deposits beremoved before preparing the part for grit blasting and subsequentcoating. Listed below are variousmethods of removing old coatings and contaminants.

• High temperature burn-off (pyrolysis)– This should be carried out at highenough temperature that does notdamage the part, either by warpageor by significantly altering themechanical properties of the metal.VICOTE Coatings require exposure toa temperature of 450- 490°C (842-914°F) for a few hours or until thecoating is completely carbonized andcan easily be removed by subsequentgrit blasting.

• Thin VICOTE Coatings can beremoved by conventional gritblasting.

• Thermoset polymer beads can beused for removal of both dispersioncoatings and also thin powdercoatings.

• Blast cleaning with dry ice is aneffective method to remove coatingswithout affecting the geometry ofmold tools.

• High pressure water jettingcombined with sodium bicarbonate isalso a method for removal of oldcoatings from mold tools.

• Laser ablation, although uncommon,is effective for removal of old coatings.

• Chemical cleaning of VICOTE Coatingsfrom a metal substrate is not feasible.

Grit blasting the part/substrate

Use clean alumina grit, 60-80 mesh(250-177 microns), for grit blasting themetal surface. The surface profile willdepend on the grit size, air pressureand type of metal. Normally, NACE* No. 1: White Metal Blast CleanedSurface Finish is recommended. Asurface profile of ~20% of the finalcoating thickness has been found to beadequate to provide good adhesion ofVICOTE Coatings to the substrate.

NACE No. 1: White Metal Blast CleanedSurface Finish is defined as a surfacewith a grey-white (uniform metallic)color, slightly roughened to form asuitable anchor pattern for coatings.

* National Association of Corrosion Engineers


Coatings ProceduresVICOTE 700 Series Electrostatic Powder Coatings

application equipment is not thoroughlycleaned, will lead to coating defectssuch as black specks and pin holes.

Thermal Spraying of VICOTETM

Coatings

For some time it has been recognizedthat the ability to apply VICOTE Coatingsusing a thermal spraying process couldprovide advantages for someapplications. As a one step process doneon site it expands the use of VICOTECoatings and allows design freedoms byeliminating the restriction of sizeimposed by traditional heating ovens,reduces the curing temperature to allowfor coating on potentially thermallysensitive substrates with no loss ofmechanical properties, enables quickand easy application of thick coatings,and increases the efficiency ofprocessing imposed by traditionalmethods that require the substrate to betransported between facilities.

During thermal spraying a stream ofVICOTE Coating powder passes through ahigh temperature flame that melts thepolymer particles which are thendeposited onto a substrate in layers. Theresult, a crystalline in nature finish, similarto that of an electro-statically appliedand cured powder coating, provides allthe excellent properties of a powdercoating applied by traditional methods.

Part recovery

If the coating is poor and notsatisfactory, the part can be recoveredin the following manner:

Place lined part in an oven (withadequate outside exhaust venting) at 450-490ºC (842-914°F). Place ashallow pan under the part coatedwith VICOTE Coating.

Heat the part and allow the majorportion of the VICOTE Coating tomelt and drip off the part and intothe pan. Remove the pancontaining the melted VICOTECoating from the oven. Allow thepart to remain in the oven forapproximately four hours or untilthe VICOTE Coating is reduced tochar. Remove charred VICOTECoating by wire brushing. A furtherlight grit blasting may be requiredat this point. Re-coat by followingthe procedure previously outlined.

Cross-contamination

It is recommended that dedicatedspraying equipment be used forapplying VICOTE Coatings or, at least,equipment that has been thoroughlycleaned to remove all traces of otherpolymers. At VICOTE Coating processingtemperatures other lower melting pointpolymers that could be present if the

horizontal and vertical direction (ifpossible) to obtain uniform thicknessand uniform exposure to heat. Thiswill prevent one section from curingbefore the other. If step-wise rotationis made, then change in directionshould be made after removing thepart from the oven. If a directionchange is made with the powder on,the potential for the powder to shakeoff and form lumps exists.

Subsequent coats also should beapplied to hot part following theabove instructions. After flowing outthe final coat, allow the part to cooluniformly, especially for parts of largethermal mass.

The temperature recommendation willvary with part mass and geometry.The most important consideration is touse the lowest practical temperatureand shortest oven cycle time to obtaina smooth, continuous, even coating.

Extended oven cycles and extremetemperature cycles (e.g. cooling toroom temperatures between coats)wastes energy and can lead to poorquality coatings. When the desiredthickness is obtained, allow the part tocool in a clean area.

Thickness correction

After the part has cooled, the thicknessshould be checked. If the part doesnot have the desired thickness, thenclean the part with a clean rag andsolvent, and heat it in an oven at 380-420ºC (716-788°F). Remove the partafter reaching the desired temperatureand continue adding additional coatsas described above.

VICOTETM High Temperature Performance Coatings 13

Coatings ProceduresVICOTE 800 Series Liquid Dispersions

Dispersion coating equipment

VICOTE 800 Series liquid dispersionscan be applied using conventionalgravity, suction HVLP or pressure spray coating equipment. Tip sizes of between 0.7 – 1.8 mm can be used depending on the volume of dispersion to be sprayed. Sprayingpressures of between 35 and 50 psi aretypically used for VICOTE Coating liquiddispersions. The air supply should beclean and free of contaminants fromthe air compressor.

Coating material preparation

Some VICOTE Coating liquid dispersionformulations may have a tendencytoward soft settling but are readily re-dispersed by hand mixing or by the useof relatively unsophisticated equipmentsuch as a low speed roller or stirrer.

VICOTE Coating liquid dispersions con-taining fluoropolymers may be proneto gelation, if subjected to high speedor high shear mixing.

Mixing for 10-20 minutes is adequatein most cases; regardless, mixing should continue until any settling hasbeen eliminated. It is imperative thatthe coating material is homogeneousprior to use.

Viscosity adjustment

The coating is generally suitable forspray application as supplied; however,some viscosity adjustment may be necessary depending upon the type of application equipment employed.Conditions of high ambient tempera-tures and low relative humidity maycause the dispersion to spray “dry” andnecessitate viscosity reduction.

If viscosity adjustment is deemed neces-sary, use only distilled or de-ionizedwater. Add the diluent to the coatingmaterial in increments of one percent(1%) until the desired spray characteris-tics are obtained, i.e., when the coatingis easily atomized and produces asmooth, wet film. Take care not to addtoo much water to the coating material.

Preparation of the part/substrate

Final coating quality demands carefulsurface preparation. Your choice ofprocedures should be based upon thedesign requirements of the part/ substrate. If you are unsure whichprocess is best suited to your needs,please contact a Victrex representative.They will be pleased to offer specificrecommendations.

1. Remove oils and greasesEach part/substrate must be free of all contaminants (oil, grease, metalshavings, etc.). Contaminated parts/substrates will cause poor adhesion ofthe coating material to the substrateand defects in the dry film.

a) Vapor de-grease to remove conven-tional lubricants from the parts/ substrates. Use a suitable solvent.

b) Wash/rinse to remove water solublelubricants from the parts/substrates.Use the appropriate detergent formula.

c) A third acceptable method of removing oils and greases fromparts/substrates is a high temperature“burn out.” This is preferred by many processors. Expose the parts/substratesto a fifteen (15) minute pre-bake at400-425°C (750-800°F) to ensure thatpetroleum base contaminants are fullycarbonized and rendered harmless.Assess the possibility of warpage,annealing the parts/substrates, etc.,prior to utilizing this method of“degreasing.”

2. Grit blastIndustrial hardware is typically gritblasted with 60 or 80 mesh (250 or 177 microns) aluminum oxide gritmedia. Grit blasting is necessary forthe coating’s adhesion, wear resistance,and overall durability. A surface profileof ~20% of the final dry film thicknesshas been found to be adequate to provide good adhesion of VICOTECoatings to the substrate.

3. Rinse each work-piece to removegritty residue Solvent rinsing is preferred. Water willcause flash rust to form on carbonsteel. Compressed air cleaning is alsoacceptable, although some grit willremain and flash rust may form on carbon steel if the compressed air iscontaminated with water vapor.

It is important that the part/substratebe prepared properly in order to gainthe full advantage of a VICOTECoating. Remove all sharp edges onthe metal surfaces. A minimum of 1⁄4"radius on corners is recommended ifthe part design can accommodate.Deburr and smooth all welds to avoidstress concentration and pin-holes inthe coating.


Stoving cycles

Stoving time is directly related to themelt temperature of VICOTE Coatingand the mass of the part/substratebeing coated. All temperature statements refer to the part/substratetemperature.

VICOTE Coating liquid dispersionsshould be dried in air after coating forapproximately 5 minutes then placedin an oven for 5 minutes at 120°C(248°F) to dry the coating thoroughly.Coated article should then be placed inan oven set at 380-420ºC (716-788ºF)until the coating has a smooth andglossy appearance.

Technical troubleshooting guides and FAQs

Technical troubleshooting guides andFAQs relating to coatings are availablefrom Victrex on request.

Safety and environmentalSafety and environmental issues forthe raw materials used in VICOTECoating formulations may be foundin our Material Safety Data Sheets.Please contact Victrex for more information.

Application equipment and techniques

VICOTE Coating liquid dispersion formulations may be applied with standard air spray equipment. Anyspray apparatus associated with theapplication of fluoropolymer or enamelcoatings, including HVLP units, willprovide a uniform film using VICOTECoating products without difficulty.The use of standard personal protec-tion equipment is recommended. It may be advantageous to filter thedispersion through a coarse filterbefore use.

“Wet” parts/substrates may be accumu-lated for a batch oven; however, theymay be affected by dust, moisture, orother airborne contaminants. Processcoated parts/substrates as quickly as feasible.

Film thickness/multiple coats

VICOTE Coating liquid dispersions maybe applied at 1-2 mils (25-50 microns)per coat; multiple coats may be appliedin proper cure sequences.

Coatings ProceduresVICOTE 800 Series Liquid Dispersions

Conclusion

VICOTETM Coatings — High TemperaturePerformance Coatings forStrength and Durability

VICOTE Coatings provide excellent wear resistance, strength anddurability for demanding applications that require exposure toextreme conditions such as high temperature, chemicals and abrasion. By using VICOTE Coatings in the coated parts of theirapplications, customers can extend application life, improve product performance and functionality, reduce systems cost, andfacilitate design freedom to achieve product differentiation.

©Victrex Polymer Solutions

Victrex Polymer Solutions, a division of Victrex plc, is the world’s leading manufacturer of Polyaryletherketones, highperformance polymers, which are sold under the brand names VICTREXTM PEEK polymer, VICOTETM Coatings, APTIVTM

films, and VICTREX Pipes™. With production facilities in the UK backed by sales and distribution centres serving morethan 30 countries worldwide, our global market development, sales, and technical support services work hand-in-hand withOEMs, designers and processors offering assistance in the areas of processing, design and application development tohelp them achieve new levels of cost savings, quality, and performance.

© VICTREX MANUFACTURING LIMITED - MARCH 2017VICTREX PLC BELIEVES THAT THE INFORMATION CONTAINED IN THIS BROCHURE IS AN ACCURATE DESCRIPTION OF THE TYPICAL CHARACTERISTICS AND/OR USES OF THE PRODUCT OR PRODUCTS,BUT IT IS THE CUSTOMER’S RESPONSIBILITY TO THOROUGHLY TEST THE PRODUCT IN EACH SPECIFIC APPLICATION TO DETERMINE ITS PERFORMANCE, EFFICACY AND SAFETY FOR EACH END-USEPRODUCT, DEVICE OR OTHER APPLICATION. SUGGESTIONS OF USES SHOULD NOT BE TAKEN AS INDUCEMENTS TO INFRINGE ANY PARTICULAR PATENT. THE INFORMATION AND DATA CONTAINEDHEREIN ARE BASED ON INFORMATION WE BELIEVE RELIABLE. MENTION OF A PRODUCT IN THIS DOCUMENTATION IS NOT A GUARANTEE OF AVAILABILITY. VICTREX PLC RESERVES THE RIGHT TOMODIFY PRODUCTS, SPECIFICATIONS AND/OR PACKAGING AS PART OF A CONTINUOUS PROGRAM OF PRODUCT DEVELOPMENT. VICTREX™ IS A REGISTERED TRADEMARK OF VICTREXMANUFACTURING LIMITED. VICTREX PIPES™ IS A TRADEMARK OF VICTREX MANUFACTURING LIMITED. PEEK-ESD™, HT™, ST™ AND WG™ ARE TRADEMARKS OF VICTREX PLC. VICOTE™ ANDAPTIV™ ARE REGISTERED TRADEMARKS OF VICTREX PLC. VICTREX MANUFACTURING LIMITED MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, A WARRANTY OFFITNESS FOR A PARTICULAR PURPOSE OR OF INTELLECTUAL PROPERTY NON-INFRINGEMENT, INCLUDING, BUT NOT LIMITED TO PATENT NON-INFRINGEMENT, WHICH ARE EXPRESSLY DISCLAIMED,WHETHER EXPRESS OR IMPLIED, IN FACT OR BY LAW. FURTHER, VICTREX PLC MAKES NO WARRANTY TO YOUR CUSTOMERS OR AGENTS, AND HAS NOT AUTHORIZED ANYONE TO MAKE ANYREPRESENTATION OR WARRANTY OTHER THAN AS PROVIDED ABOVE. VICTREX MANUFACTURING LIMITED SHALL IN NO EVENT BE LIABLE FOR ANY GENERAL, INDIRECT, SPECIAL, CONSEQUENTIAL,PUNITIVE, INCIDENTAL OR SIMILAR DAMAGES, INCLUDING WITHOUT LIMITATION, DAMAGES FOR HARM TO BUSINESS, LOST PROFITS OR LOST SAVINGS, EVEN IF VICTREX HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGES, REGARDLESS OF THE FORM OF ACTION.

World HeadquartersVictrex plcHillhouse InternationalThornton CleveleysLancashire FY5 4QDUnited KingdomTel: + (44) 1253 897700Fax: + (44) 1253 897701Email: [email protected]

AmericasVictrex USA Inc300 Conshohocken State RoadSuite 120 West Conshohocken, PA 19428USATel: + (1) 800-VICTREXTel: + (1) 484-342-6001Fax: + (1) 484-342-6002Email: [email protected]

EuropeVictrex Europa GmbHLanggasse 1665719 Hofheim/Ts.GermanyTel: + (49) 6192 96490Fax: + (49) 6192 964948Email: [email protected]

Asia PacificVictrex Japan Inc.Mita Kokusai Building Annex4-28, Mita 1-chomeMinato-kuTokyo 108-0073JapanTel: +81 (0)3 5427 4650Fax: +81 (0)3 5427 4651Email: [email protected]

Asia PacificVictrex High PerformanceMaterials (Shanghai) Co LtdPart B Building G No. 1688 Zhuanxing RoadXinzhuang Industry Park Shanghai 201108ChinaTel: + (86) 21-6113 6900Fax: + (86) 21-6113 6901Email: [email protected]

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