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July 2002

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Subject:
From:
"Randy Bock Sr." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 25 Jul 2002 15:37:47 -0400
Content-Type:
text/plain
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text/plain (55 lines)
Zinc plate may show a lite brown depending on the bath.   Passivation is a
acid bath
to remove machining oils etc.  No rust preventation properties.

----- Original Message -----
From: Ken Patel <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, July 25, 2002 1:43 PM
Subject: [TN] Sheet Metal Plating


> Hello there,
> We are seeing some sheet metals with problems like corrosion, finger
> print and some kind of weird brown spot on them. we have specified
> Bright Zinc Plating on them. I am interested in sending this to any
> local lab fro analysis.
> (1) Name of any lab where I send them for analysis, preferably local in
> San Jose Bay Area.
> (2) Should I change the plating spec?
> (3) What is passivation?
>
> My vendor was suggesting Double Zinc Plating. Any help will be highly
> appreciated.
>
> Re,
> Ken Patel
>
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