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-----Hot dip galvanizing over electroplated steel?
October 15, 2013
Q. CAN I HOT DIP GALVANIZE AN ELECTRO PLATED ITEM SUCH AS A TUBE WITHOUT STRIPPING IT FIRST?
ALFRED HASELBECK- GAUTENG, South Africa
A. Hi Alfred. That's an almost unqualified "No."
The galvanizing must react directly with the base steel. But if the previous plating is zinc, you might find a galvanizing shop willing to just run the parts through the line, which will strip the old zinc -- but most will probably not want to contaminate their process tanks with your old plating.
Regards,
Ted Mooney, P.E.
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