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Test to differntiate Anodizing vs. Chromate conversion Coating

Q. Would like to know what simple test could be applied to a part to determine whether a MIL-C-5541 Class 1A Coating was applied or if the part was anodized instead.

Ken Tolbert
liquid chromatography - Milford, Massachusetts
2004

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A. Hi, Ken. Mil-C-5541 coatings are intended to be electrically conductive whereas anodized coatings are electrically insulative. So the very easiest test is to check the resistance with a multimeter.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

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