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  for Metal Finishing since 1989
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Plating Ni and Sn from same bath

 

Is it possible, under any circumstances, to plate Ni and Sn separately from the same bath? I am asking this because I know that you can plate Ni and Cu from the same cyanide bath by varying potentials. But what about Ni and Sn?

Andrew Herzing
- Fishkill, New York

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What chemistry are you planning to use for the tin-nickel solution?

  
Tom Pullizzi
Falls Township, Pennsylvania

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Looking up the potentials of the various metals you mentioned, Cu, Ni and Sn. The potentials of these various metals are 0.34V Cu, -0.25 V Ni and -0.12 V Sn. The potential difference between Sn and Ni is small as compared to the Cu and Ni potentials.

Also looking at this on the alkaline side the potential differences between Ni and Sn is only .2V difference.

Tin research institute in Britain gave full details of a process to plate sn-ni.

Yashawant Deval
- Pune, Maharashtra, India

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Ed. note: You may want to hear "The Lost Art of Tin-Nickel Plating".