Hi Technetters,

I have 2 questions:

1: How is this oxide formed?
2: is there a "safe" way to clean it after the fact?

On very rare occasion, we have a "verdigris" outbreak on Tin plated solid Cu wire. The insulation tends to not be well adhered (PTFE) when this "breaks out" The stripped wire looks "normal" but when soldered with OA flux (either hand or wave) it starts showing a blue-green oxidation at the insulation/wire interface. Wetting is marginal at best. Scrapping the wire and going to a different manufacturer usually resolves it, but there's still labor involved since it doesn't show up until later in the process & must be reworked.

Thanks in advance!

Regards,

Ed Popielarski
Engineering Manager

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