No-one seems to have asked the $64000 question (should be up-dated today
to $1M). What kind of flux are you using? It is possible you have some
flux residues remaining and ***it is worse than useless*** to apply a
conformal coating over demonstrably corrosive contamination: at the
best, you will only delay the onset of problems.

Brian

Dean Hunt wrote:
>
> Is anyone having problems with PCB corrosion. We have a number of products
> which are showing signs of corrosion on the copper tracks and planes. The
> products concerned are in non-air conditioned  environment and varying
> humidity situations. Does anyone know of a suitable method to protect PCBs
> from external elements. I am keen to hear of any known solutions to this
> problem.
>
> Thanks
>
>                                  Dean Hunt
>                            CAD Solutions Manager
> -------------------------------------------------------------------------------
>
>     Invensys Energy Systems (NZ) Limited, 39 Princess St, PO Box 11-188
>                       Christchurch 8030, New Zealand
>              Phone: (++64) 3 343-3314, Fax: (++64) 3 348-5100
>                        Phone: (++64) 3 343-7471,DDI
>                    Email: [log in to unmask]
>                  Website: http://www.invensys-energy.co.nz
> --------------------------------------------------------------------------------
>
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