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Conversion coating for high pH (cow manure) protection

March 24, 2011

We have an electronic product that has a plastic case, with very pure aluminum deposited
on the inside for shielding purposes. It is top coated with Sanchem Safegard CC-3400 Seal #2
which is excellent for salt corrosion (our product is also used in marine environment).

I testing, I find that cow manure etches thru the conversion coating and aluminum to the plastic.

56969

Have any of you used a topcoat that is able to withstand the high pH (~11)

I have been told that nickel may stand up better in our environment.

Thanks for your recommendation.

Patrick

Patrick Nefos
product designer - Loveland, Colorado, USA

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