workshop on hazardous substances affecting metallic-coated steel and other metals may 23, 2007
TRANSCRIPT
Workshop on Hazardous Substances Affecting Metallic-Coated Steel and Other MetalsMay 23, 2007
2page
Henkel – RoHS CompliantPassivate Discussion
Agenda:
• Position on RoHS• Products Discussion
• Offerings• Corrosion performance• Field experience
• References
3page
Henkel Position on RoHS
Electrical and electronic equipment (not all end users)• Appliances• Computers• Televisions, video recorders
Hexavalent Chromium (CrVI) is critical element for metal passivation treatments listed in RoHS regulation
• Must contain less than (0.1%) 1000 ppm. Hexavalent chromium or contain no intentionally added hexavalent chromium in any homogeneous layer
• Henkel position is that passivate coatings do not become a homogeneous layer with substrate, but, the discontinuous layer of the passivate. (IBM agrees with this position).
Chromium free products are compliant simply because there is no chrome present
Chromium III (trivalent) products are compliant in both the product and as-dried surface since Cr(VI) is below 1000 ppm and no Cr(VI) is intentionally added.
Conversion of Cr(III) → Cr(VI) will not happen under “normal” circumstances• PH≥14 or extreme oxidation are required• Practical basis, Cr(VI) not present during life-cycle of the coated materials.
4page
Hexavalent Chrome-Free Passivation Offerings
Three approaches:
• Non-chrome containing inorganic passivate
• Trivalent chrome inorganic passivate
• Thin organic coating non-chrome containing (acrylic coatings)
5page
Hexavalent Chromium Containing Inorganic Passivates: “Chemtreats”
Typical coating weight: 1.0 – 2.0 mg/sq.ft. Cr
Applied by flood squeegee and dried by hot air dryer
Corrosion performance by neutral salt spray (NSS): 96+ Hrs.
“Wet” corrosion tests: 800+ Hrs.
Low cost, good corrosion prevention
“Non-Paintable”
6page
Henkel Passerite 5004 WChromium-Free Inorganic Passivate
Major Coating Constituents
Molybdenum Titanium Phosphate Fluoride Organic Polymer
7page
ApplicationBath Concentration 20%-100% (Dependent On Coater)
30% is Typical
Run as Flood or Dip/Squeegee or Chemcoater
Bath pH: 2.5-3.5
Coating Wts.: 30-80 mg./sq.ft. (50 mg. is recommended)
Bath Temperature: <40C (104°F)
Strip PMT: 50-60C min., 120C max. (Above 120°F)
Drying Time: < 10 seconds recommended
P-5004 WChrome-Free Inorganic Passivate
8page
Passerite 6001 / Passerite 6003 / Bonderite 6020Trivalent Chromium Passivate Application Parameters
Application: Spray / squeegee (low bath volume) Chemcoater
Contact time: < 10 seconds
Bath Temp: < 110°F
Coating Weight: 30 – 40 mg./sq.ft. (20 – 30 mg./sq.ft. for B6020)
Cr Coating Weight: 3.0 – 4.0 mg./sq.ft. (2.0 – 3.0 for B6020)
Bath pH: < 2.5
Zn Dissolution: < 1.8% by weight
Bath Concentration: 10 – 60% dependent on flow to line,
20 – 30% is typical
Strip PMT: 110°F → 200°F
9page
Recommendations for Designing a System for Hex-Chrome Free Passivates
Solution contact time (time between application / drying ) – as
short as possible. Less than 5 seconds excellent.
Chemcoater best method (spray / squeegee is acceptable)
Drying peak metal temp (PMT) - 120°F minimum (220°F max)
Equipment materials (contacts solution) – 316 or 304 stainless
steel, or polymer (PVC, PEHD or PP) – no carbon steel
Wringer rolls – Hypalon, Viton or polyurethane covering – 45 –
55 shore hardness
Solution volume – as small as possible – less than 30 gallons –
(Henkel “Coiltech” system)
• Maintain pH below 2.5 – minimize zinc contamination
X-Ray fluorescence (Portaspec) recommended for coating
weights
10page
Henkel Standard Accelerated Corrosion Tests for Passivation Treatments
Neutral Salt Spray (NSS)
Wet Stack
Cleveland Condensing (CCH)
Butler Water Immersion (BWI)
11page
Corrosion Overview – Field Performance
Customer Prouduct Used
NSS Results
Wet Stack BWICleveland
Condensing24 48 72 96
A P6001 5 10 20 35+ 800 hrs. 800 hrs.+ 1000 hrs. +
B P6003 5 10 15 35+ 800 hrs. 800 hrs.+ 1000 hrs. +
C P6003 5 10 20 40+ 800 hrs. 800 hrs.+ 1000 hrs. +
D B6020 1 5 15 30+ 800 hrs. 700 hrs.+ 1000 hrs. +
E B6020 0 1 5 10+ 800 hrs. 700 hrs.+ 1000 hrs. +
F B6020 1 5 10 20+ 800 hrs. 700 hrs.+ 1000 hrs. +
G P5004W 5 10 20 25+ 800 hrs. 700 hrs.+ 1000 hrs.+
H P225W 0 0 1 5+ 800 hrs. 700 hrs. 1000 hrs.
→ Wet Stack, BWI and Cleveland Condensing results are to 5% white rust
Coating Wts. (Chrome mg/sq.ft)
A - 4.0 - 6.0
B - 4.0 - 6.0
C - 5.0 - 7.0
D - 3.0 - 4.0
E - 3.0 - 4.0
F - 1.0 - 2.5
G – 40 – 60 mg./sq.ft. (total)
H – 1.0 – 2.0 mg./ft2 chrome VI
12page
Trivalent Based Passivation – Product Evolution Commentary
“Passerite 6001 → Passerite 6003 → Bonderite 6020”
Continuous improvement in all of the following:• Corrosion performance (NSS)• Lower coating weight (lower applied costs)• Improved “paintability”• Improved conductivity (IBM and HP)• Less corrosive to equipment (304 and 316SS)• Bonderite 6020 – removal of organics – no foaming
Products have become more operator and end-user friendly
Next generation product – Bonderite 6010 – “fluoride free” – being tested in Europe
13page
• Primarily Used For Galvalume and HDG Coated Steel
• Expected Performance: Roll forms without oil
Good fingerprint resistance
Excellent corrosion performance
180° – 220° F PMT
Thin Organic Non-Chrome Coating:(Replacement For Hexavalent Cr Containing Acrylics)Granocoat 342
14page
Non-Chrome Thin Organic Coating: Granocoat 342
Galvalume HDG
Corrosion Data In Hours To Failure Stack BWI NSS Cleveland Stack BWI NSS Cleveland Cr+6 2016 1008 760 672 1008 1008 760 672 (Present Day) Granocoat 342 1008 1008 760 672 1008 1008 336 672
Specifications:
15page
Coating Weight: 75-200 mg./sq.ft. PMT: 170° - 250° F Application Method: Chemcoater Concentration: Used Neat Application Temperature: Ambient Recoil Temperature: <160°F
Non-Cr Thin Organic Passivate: Application Parameters:
16page
Granocoat 342 (Non-Chrome Acrylic)
Summary:
Corrosion performance slightly inferior in NSS (HDG) and wet stack (Galvalume)
Roll-forming excellent and verified at 9-stage roll former (correlates well with Butler Building roll former)
“Paintable” surface
In use at Precoat – Portage and CFM for small applications
Successful trials at Mittal – Sparrows Point (Galvalume) and Nucor – Berkeley (HDG)
page
INORGANIC PASSIVATION HEX-CHROME FREE
REFERENCES LIST
CUSTOMERS
18page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
TKS EBA1
GERMANY
PASSERITE 6003(20% vol)
Spray + Squeegee
EG Dieter Schrocer
+492035223865
VOEST
(4 lines) Austria
PASSERITE 5004
Spray + Squeegee
Rollcoater
HDG Franz Androsch
+4373265856852
TKS FBA7
Germany
PASSERITE 6003(40% Vol)
Spray + Squeegee
HDG Kurt Motte
+492349193492
TKS FBA4
Germany
PASSERITE 6003(30% vol)
Spray + Squeegee
HDG Udo Schulokt
+492035227700
19page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
ACCIAIERIA CREMONA (IT)
PASSERITE 6001 (40 to 45%vol)
Spray + Squeegee
HDG Carlo Lanzini
+3903724782
WUPPERMANN
(Holland)
PASSERITE 5004(40 to 45% vol)
Spray + Squeegee
HDG Hans G. Klockner
+31168357150
CORUS
Holland
PASSERITE5004(80 to 90% w/w)
Chem Coater HDG Thijs Post
+31622605651
20page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
ARCELOR AVILES
(Spain)
PASSERITE 6001
(40% vol)
Coil tech HDG Jose Manuel Puente
+34985126137
WHEELING NISSHIN (US)
PASSERITE 6001 (100%)
Spray + Squeegee + Roll coater
HDG
GALVANNEAL
USS POSCO
(US)
BONDERITE 6020 (20%)
Spray + Squeegee
HDG
WUPPERMANN
(2 lines)
(Austria)
PASSERITE 5004
Spray + Squeegee
Vacuumat
HDG Hans Georg Klockner +31168357150
MITTAL
SPARROWS PT.
MD
PASSERITE 6001
Spray + Squeegee
HDG Rob Weber
21page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
SSAB BORLANGE (SU)
Passerite 6003
(25 to 30% Vol)
COIL TECH HDG Mat Eliason
+4624372902
MARCEGALIA
(Italy)
PASSERITE 6001(25to30% w)
Spray + Squeegee
HDG Mr IVALDI
+390544516611
GONVARRI
(Spain)
PASSERITE 6001(55 to 60%vol)
Roll coater + Spray + Squeegee
HDG Jacek Michalek
+34937734656
NLMK
(Russia)
PASSERITE 5004(40 to 45%v)
Spray + Squeegee
HDG
22page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
Mittal Galati
ROMANIA
P. 5004 Roll Coater HDG Mr Munteanu
+40 722 56 42 48
Arcelor(VZA1)
Eisenhuttenstadt
P. 6003
(33 to 36% v/v)
Spray + Squeegee
HDG
RUUKI
Finland (1)
P. 6003 COIL TECH HDG Mr Paavilainen
+358205925554
RUUKI Finland (3) P. 6003 Chemcoater HDG
23page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
JSW - Tarapur Passerite 6000 Spray + Squeegee
HDG Rajesh Singh
+919371750420
Ispat India Passerite 6001 Spray + Squeegee
HDG R.S.Jain
+919823320396
Lloyds Steel India
Passerite 6001 Spray + Squeegee
HDG P.K.Chatterjee
+919326036261
Tata Steel Passerite 6001 Spray + Squeegee
HDG S. Beborta
+919234511144
24page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
JINDAL (India) Passerite 6000 Spray + Squeegee
HDG
JINDAL (India) Passerite 6001 Spray + Squeegee
HDG
Bhusan Steel (India)
Passerite 6001 Spray + Squeegee
HDG
An Steel (China)
Passerite 6000 Roll Coater HDG
25page
CUSTOMER PRODUCT APPLICATION SUBSTRATE CONTACT
Benxi (China) P. 6003 Roll Coater HDG
Borcelik (Turkey)
P. 6003 Spray + Squeegee
HDG
26page
Thank you