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Silver plating on Silver substrate procedure

Q. Looking for a procedure to silver plate over silver plate (industrial)

Tom Houvouras
Plant Manager - Huntington, West Virginia USA
October 2, 2015

A. Clean to remove organic soil and films
Dip in 2%/vol commercial 66 degree sulfuric acid
Silver strike
Silver plate.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

October 2, 2015

A. Sorry, I have to disagree with Mr Probert's recommendations, if you are using a potassium cyanide based silver strike or silver plating bath. If you are using a non-cyanide silver bath please disregard my comments. sulfuric acid dip really should not be used on a cyanide silver line. If the parts are not rinsed well enough there can be cyanide gasses generated as you go into the strike bath. A quick cyanide dip or potassium hydroxide dip (4 to 6 oz/gal) before the silver strike is generally employed. After the dip you can go directly into the strike bath, then directly into the silver plate bath. Hope this helps!

Mark Baker
Process Engineer - Phoenix, Arizona USA
October 10, 2015

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