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April 2008

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Subject:
From:
Ken Bloomquist <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ken Bloomquist <[log in to unmask]>
Date:
Fri, 18 Apr 2008 09:34:22 -0700
Content-Type:
text/plain
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text/plain (45 lines)
Hi Carl,

Sorry to have sidetracked your original email subject.

If you have components that are sensitive to moisture entrapment then they
must be sealed during water wash. If you get water into say a switch then a
number of bad things can begin to happen. Some that come to mind are
corrosion to internal metal parts, dendrites growing if contaminants got
into the switch along with the water, a sticky switch again if more than
just plain water got in there and the worst thing is that most of the
defects will be latent only causing a problem when your customer needs your
product at a most important moment!

I'm sure others will chime in with more reasons but the manufacturers of
components warn against washing particular parts for a reason, don't do it
unless you seal them really good!

KennyB

-----Original Message-----
From: Ray, Carl (GE EntSol, Intelligent Platforms)
[mailto:[log in to unmask]] 
Sent: Friday, April 18, 2008 7:59 AM
To: [log in to unmask]
Subject: Re: [TN] Defects related to water wash

My initial question was related to functional damage to components due
to the exposure to the washing processes. Not any types of mechanical
damage. Example - BIT Switches have tape to protect the component from
the wash process. If the tape was removed or if a part was not designed
to withstand a washing process what types of related defect could be
expected, short and long term? 



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