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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Contaminants in Chromic Acid Anodize attacking existing Hardcoat Chrome Anodize
Q. Hello,
I am wondering if anyone may know of a contaminant in a chromic acid anodize bath that may eat away at a previously hardcoated part? Basically, a part was chrome hard coated, then came to us and ran through the chromic anodize process. After, he previous hard coated area looks like something was eating away at it. I suspect it could either be a contaminant in the chromic bath or possibly something to do with the current in the bath. Analysis shows the chromic bath is in correct parameters. Any suggestions?
Lab Tech - St. Paul, Minnesota
April 18, 2012
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