HP Forum Archive 15

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HP-12C: Corrosion on Negative Terminal Message #1 Posted by Mike Brady on 11 Oct 2005, 9:13 p.m. 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 Message #2 Posted by donald wallace on 11 Oct 2005, 9:27 p.m., in response to message #1 by Mike Brady Try tinning the copper contact spring near and at where it touches the battery. Solder is less reactive than copper. dw

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