If the gold goes greenish, it is because the layer is too thin or too
porous to protect the undelying metal (Ni or Cu) and corrosion results.
Both Ni and Cu salts can be green.
Brian
Janoch Jiøí, Ing. wrote:
> Hallo Techneters,
>
> does anybody have an experience in immersion gold plated board humidity
> tests ?
> Are these tests the same for all PCB finishes ?
> Where is the fault if gold goes greenish ?
>
> Thanks in advance
>
> J.Janoch, TSE
>
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