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Ted Mooney, P.E. RET
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Need better cleaning before zinc-iron plating
We are experiencing problems in our zinc-iron line with a part that presents a black spot after tack welding and before hand brazing, according to our braze rod supplier: "It appears to be oxidation due to burning off an oily residue". Can you suggest a procedure to overcome this issue, we suspect we are not using the appropriate cleaning method.
Currently to get a good part it needs to go twice through the process line, been stripped after the first time through the line.
Thank you very much for your help.
plating shop employee - Cartago, Costa Rica
March 7, 2011
Hi, Arnoldo.
Are you doing rack or barrel plating? What is your current pretreatment: soak clean-electroclean-hydrochloric acid activate?
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 10, 2011
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