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Ted Mooney, P.E. RET
Pine Beach, NJ

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Advice on Nickel plating for an aluminum alloy

We are using Aluminum alloy of 0.4% Silicon & 0.4% Magnesium in the heat sinks on both sides of a rectifier diode which is designed to carry 1000 amps of DC current. We are desirous of Nickel plating on the Aluminum surface to prevent corrosion so that the contact resistance is maintained at the designed level. These devices are installed in a closed room where the temperature may go up to 70 °C. Please advice the method of plating the same & if any clarifications are required the same will be provided.

Prakash Mummigatti
NATIONAL ALUMINIUM CO.LTD - NALCONAGAR, ORISSA, INDIA

You can zincate the parts, then copper plate them, then nickel plate them. Or you can zincate the parts, then electroless nickel plate them. As a 3rd alternative, prefaced with a big MAYBE, you can simply electroless nickel plate them without the zincate.

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

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