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PWB: Chrome plated piston is rusting at jig point

Q. Dear Sir,
We are doing hard chrome plating on piston crown (ring groove area). While we are doing the hard chrome plating, the plating process takes place smoothly without any disturbance. But the piston crown mating face (holding area of the piston crown to the jig) is getting corrosion. For what reason is is happening. Is it a chemical problem or an electrical problem? Please help me.

Arivarasan Ashok
- Singapore
August 14, 2012

A. Is the contact point of the jigging actually being chrome plated? If it is not, which I suspect, that is the cause of your problem

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
August 29, 2012

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