i too am having a hard time getting the yellow chromate to hold, right after i zinc plate i rinse with water and dunk into chromate for about 1-2 mins ,after 2-3 days i can remove all the color off with water and a rag, im running the bath @80%.... any ideas how to resolve this?
would a Nitric Dip help right before chromating?
thanks .
ps: im zinc plating old carb castings from the 60s.
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