ge-akzonobel coating salt spray interim testing 10...
TRANSCRIPT
GE & AkzoNobel Coating Salt Spray
Interim Testing to ASTM B117
Created by Tom Dauzat 10-21-2019
Purpose
• To validate the procedure for comparative weight loss per C57.12.32-2019 in accordance to Section 4.3.2 and Annex A
• ASTM B117 salt spray test panels having to be bare substrate material use for tank construction shall be compare to bare 409 stainless steel test panels with a percent weight loss no more than 2.5 percent for each test panel after being exposed to 1500 hours
• A ratio between percent weight loss with bare substrate and 409 stainless steel shall not be more than 5 to 1
Material Samples Being Tested
• Samples are 304L, 316L, 409L, Cu-Bearing Steels
• Samples have controls for each 304L, 316L, 409L, Cu-Bearing Steels
• Samples that are 304L, 316L, and 409L have a thickness of .25 inch
• Samples that are Cu-Bearing have a thickness of .312 and .50 inch
• Samples have some with weld bead per standard
• Samples have different combinations of painting methods
• Samples have 3” x 4” and 3” x 6” per two standards (12.32 & 12.31)
• Following Slides Only Show Interim Testing 1032hrs of Salt Spray• 316L was not tested at this time due to space in salt spray chamber• ANSI 70 gray was not tested at this time due to space in salt spray chamber• Cu-Bearing .50 inch was not tested at this time due to space in salt spray chamber• Materials with Weld Bead was not tested at this time due to space in salt spray chamber
Calibration of Scale
Pictures of 409L Interim Samples Before Test
Pictures of 409L Salt Spray 1032Hrs Samples
Pictures of Cu-Bearing Interim Samples Before Test
Pictures of Cu-Bearing Salt Spray 1032Hrs Interim Samples
Pictures of 304L Interim Samples Before Test
Pictures of 304L Salt Spray 1032Hrs Interim Samples
GE Weight Percent Weight Loss After 1032Hrs
Per conversations
with the lab, the
numbers in bold are
most likely to take
place when the salt
solution is being
absorbed within the
material and/or paint;
just didn’t come out
with the cleaning step
per standard hence
suggest that wording
should be percent
weight change, not
percent lost.
AkzoNobel Weight Percent Weight Loss After 1032Hrs
Per conversations with the
lab, the numbers after test
i.e. ‘final weights’ are most
likely to place when the salt
solution is being absorbed
within the material and/or
paint; just didn’t come out
with the cleaning step per
standard hence percent
weight loss ‘0’… Suggest to
still show change in weight
and not put ‘0’?