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topic 50322

CHROME SCRATCH REPAIR


October 18, 2008

I REPAIR SCRATCHES ON PISTON ROD BY WELDING, THEN GRINDING AND POLISHING. ANY SUGGESTIONS
ON HOW TO FILL AND FINISH USING ANY OTHER MATERIAL AND METHOD.
THANK YOU.

GORDON SCOTTI
PISTON REPAIR - BRIDGEWATER, New Jersey

October 22, 2008

Brush plating is an alternative. With this process you build-up the damaged area with a soft or mid-hard metal to fill the scratches, hand scrape and polish it, then apply a hardfacing alloy very similar to chrome over the repair. It's a wet or electrochemical process that operates at room temperature (no heat distortion, cracks or HAZ). Only problem is that it uses hazardous materials and produces hazardous waste. Another alternative is spark welding. Much less heat input than any TIG welding.

Guillermo Marrufo
Monterrey, NL, Mexico



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