Vee haf vays off dealing with dies problem, jah?

Dr.

You are baking the boards after applying a corrosive mixture like flux to the
surface?  Jah?

If you were NOT getting corrosion, I would be surprised.

It is my guess, that if the corrosion is not on the board before this step,
it would be afterwards, especially if the baking were being done "casually",
and not under strict minimum time and temperature guidelines.

Check to see if you have corrosion before soldering, perhaps by running a
bare panel down the solder line, with no flux and/or baking?

Good luck.

Rudy Sedlak
RD Chemical Company

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