Homebrew PCBs

I use this spray for coating, so far it does well:

<http://uk.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=%09ERDCA200H&x=35&y=22>

Try to find out if your coating has cracked or just poor adhesion. If
you etch your own boards rinse/wash them really really well and
perhaps neutralise after etching with a soak in sodium bicarbonate or
something. Etchant residue is a big hassle in terms of corrosion.

ST

On Fri, Nov 20, 2009 at 10:42 AM, multidigital15
<jboavida@multidigital.com> wrote:
> Hi,
>
> I have some PCB's in a place with a lot of moisture (basically the system is on the top of a small moutain around 1000 meters above sea level).
>
> Normally I use Kontak Chemie's Plastik 70 to protect my PCB's, but in this case it does not work. Yesterday in a preventive maintenance I had found that the PCB tracks are almost gone with corrosion.
>
> I need advice how to protect the PCB's in this environment. I had see that acrylic and silicone based coating products exist on the market. I guess silicone based are better for  this applications, but I'm not sure. Can anyone advise some produts to better solve this problem?
>
>
> Thanks in advance
> Joaquim
>
>
>
> ------------------------------------
>
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