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HP-12C: Corrosion on Negative Terminal - Printable Version

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HP-12C: Corrosion on Negative Terminal - Mike Brady (San Francisco, USA) - 10-11-2005

Does anyone have a solution for preventing copper oxide corrosion from developing at the negative battery terminal (the platted plunger type contact). I'm guessing the copper oxide is caused by cathodic corrosion which is developing between the two different metals of the battery's negative surface and the calculator's non-tinned negative terminal.


Re: HP-12C: Corrosion on Negative Terminal - donald wallace - 10-11-2005

Try tinning the copper contact spring near and at where it touches
the battery. Solder is less reactive than copper.

dw