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>Date: Wed, 21 May 1997 09:46:43
>To: [log in to unmask]
>From: Sheila Smith <[log in to unmask]>
>Subject: RE: Copper sulphide corrosion
>
>John,
>
>I assume you have confirmed the presence of copper sulphide by chemical
analysis, not just by appearance or color? If the silicone is an acetoxy
curing RTV, it could be releasing corrosive byproducts during the cure--
that is generally common knowledge in the industry so most folks wouldn't
use that type of cure system silicone but you probably should ask the
question of your supplier.
>
>We don't typically use a silicone for this type of application -- adhesion
is too much of a problem. We use a urethane or epoxy conformal coating or,
if additional thermal conductivity or mechanical strength is needed, we use
a filled, flexibilized epoxy. Feel free to email me directly if you'd like
more details.
>
>Sheila Smith, TRACOR AES
>
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