Thanks Brian!

It is acrylic I'm talking about. Will 140F be OK?

Also, what the should worry be: any damage to the protetcive layer that cannot be seen under UV light or moisture entrapment?

Should I consider a low temp (how low) post-wash bake?

Thank you,

Ioan

-----Message d'origine-----
De : Brian Ellis [mailto:[log in to unmask]] 
Envoyé : 11 août 2008 10:23
À : TechNet E-Mail Forum; Ioan Tempea
Objet : Re: [TN] Washing of conformally coated boards

Theoretically no, if it was properly applied in the first place. Provisos:
a) tender coatings, such as acrylics, like neither high temps nor 
aggressive chemicals in your wash water.
b) silicone coatings will wash OK but you may have problems with 
moisture absorption/adsorption in the drying stage.
c) urethanes and flexibilised epoxies should normally be OK

Brian

Ioan Tempea wrote:
> Dear Technos,
> 
> A quick one : can I water wash conformally coated boards?
> 
> This means conformally coated boards have been returned for rework, we
> will change the components (have to use WS flux) and have to wash.
> 
> Can regular water wash at 140F do any damage to coating?
> 
> Thanks,
> 
> Ioan 

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