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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


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Electrocoating nickel over electrogalvanized steel




I am an electroplating engineer. I want to electroplate a thin nickel layer over the electrogalvanized steel plate. I tried a few times but all failed. After plating, the surface looked so ugly, dirty and black. Did anybody have some experience of electroplating a nickel layer over electrogalvanized steel plate? Thanks for your time!

Marie Li
Plating engineer - Seattle, Washington, USA
2007


Can you share with us why you would want to do such an unusual finish? At best it is difficult to nickel plate zinc, but you might try electroless nickel if that meets your needs. Otherwise you would need a nickel plating solution customized to apply a strike to zinc. The most reliable approach, if permissible, might be to cyanide copper plate and acid copper plate before the nickel.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007


First you must completely remove the chromate conversion coating that is on the zinc., this is where your dark, black, and ugly appearance is coming from. This will involve getting down below the conversion and hence removing some of the zinc thickness. Then enter a regular Watts solution by making contact externally and entering 'hot".

robert probert
Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina
probertbanner
2007




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