tension test in astm d1141
TRANSCRIPT
DOX-Steel®Corrosion Proof Technology
LABORATORY IMMERSION CORROSION TEST
MASS LOSS TEST UNDER
MECHANICAL STRESS
TEST CONDITIONS
Test specimens
½ x 3 ½ ASTM A193 B7 all thread stud w/2 each ASTM A194 grade 2H heavy hex nuts
CoatingsZincZinc-NickelDOX
Immersion conditions
• Tank volume: 8 L (2.1 gallons)
• Substitute Ocean Water according to ASTM D1141 -
98(2013)
• Temperature: 25 °C (77 °C)
• pH= 8.2
• Mechanical agitation
• Immersion time: 408 h
Device configuration and torque
DOX-SteelTorque: 72 Lb ft
Zinc Zinc-Nickel
t= 0 h
t= 240 h
ZincZinc-Nickel
DOX
End of immersion
Zinc Zinc-Nickel
DOX-Steel
RESULTS
Zn plating Zn-Ni DOX-Steel0
100
200
300
400
500
600
700
539573
0.1000
452412
0.0823
Corrosion Rate in sea water
Fastener tension Fastener no tension
Corr
osio
n ra
te µ
m/y
ear
What is next?
• Electrochemical testing of fasteners under mechanical stress
• Electrochemical testing of fasteners under mechanical stress and cathodic protection