Letter 29016

Plating aluminum in acid tin  

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We plate copper bus bar in tin and in silver. I wanted know how we could plate aluminum bus bar in tin. What is the process to this.

Howard Leatherwood
Plating shop - Pearland, Texas, United States

You cannot electroplate directly onto aluminum because it is so active that it forms a passive skin instantly. The normal procedure is to immersion plate zinc onto the aluminum via a zincating bath, and then proceed with copper and tin. As an alternative, Atotech offers a proprietary sequence for plating aluminum busbar called Alstan.

Ted Mooney, P.E.  finishing.com Brick, New Jersey

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