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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
October 17, 2013
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.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey