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Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Nickel plating-pitting
i am from india. we are having a nickel vat plating. doing job work for automobile parts. we are facing the problem of pitting. we are unable to solve the problems. anybody suggest to solve the problem. what is the general methods to stop pitting.
vijaykumar- coimbatore, India
2000
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Pitting, in general, is caused by something on the surface which prevents plating from occurring. In nickel, this comes from either a contaminated surface, or from hydrogen bubbles adhering to the work. If it's a cleaning problem, you need to look at the pre-plate processes and the nature of the soil to find the solution. If it is hydrogen bubbles, you need to contact your supplier, because you need a wetting agent to prevent the bubble from sticking.  James Totter, CEF - Tallahassee, Florida Vijaykumar.  Anders Sundman 4th Generation Surface Engineering Consultant - Arvika, Sweden |
Dear Vijaykumar,
Both above replies are correct. Add double/triple of the additive to the brightener that you use. Also ensure that your filter is filtering the solution and not merely acting as a pump moving liquid in and out of your Tank.
regards
Khozem Vahaanwala
Saify Ind
Bengaluru, Karnataka, India
2000
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