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Trouble shooting on tin plating

Why do blisters occur when tin plating is done with aluminium based metal? What is the process for tin plating on aluminium? To do tin plating on aluminium casting can sand-blasting be done and then copper plating?

P.G. Chandramani
Bharat Electronics - Bangalore, Karnataka, India

Zincate, strip in nitrip acid, zincate again, cyanide copper strike, bright acid copper plate.

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

1.if there is roughness in acid copper plating what the troubleshooting has to be done
2. if there is pitting in acid copper plating what the troubleshooting has to be done

ANKIT DEDHIYA
- Mumbai, India

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