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-----How to detect whether powder coating is on GI vs CRCA?
Q. During assembly we found a mix-up issue. Please give a visual detection standard or is there any instrument for the same.
Abhijeet B. Berad- Maharashtra India
September 13, 2022
A. Hi Abhijeet. If there was a way to detect visually, buyers would insist on the process being improved so there wasn't :-)
A simple magnetic pull tester can reveal the combined thickness of non-magnetic galvanized and powder coated finishes, so if the galvanizing is quite thick and the powder coating is quite thin, perhaps it can differentiate. Beyond that you would need a more expensive non-destructive test such as x-ray fluorescence or beta backscatter.
Luck & Regards,
Ted Mooney, P.E. RET
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