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Need durable, solderable finish for spring steel contact

I have a custom spring steel battery contact (.010" thick material) I wish to place on a circuit board using a surface mount process. I need good solderability, but want good durability and corrosion resistance since the battery connection will be made and broken each time the battery is replaced in the product. For durability, I'd like an electroless nickel, but an leaning toward tin-lead plating for solderability and resistance to tin whiskers. Any suggestions?

Bill Kaufman
- Garrett, Indiana, USA
2003

Another alternative you could look at is Tin-Nickel alloy. This coating has good solderability, corrosion resistance and contact resistance.

George Shahin
Atotech - Rock Hill, South Carolina
2003

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