Kris,

I believe that you are talking about immersion gold however with both
immersion and electrolytic rinsing before and after can cause this problem.
How does the nickel look before gold plating. Also if you have a activator
and it is weak this to can contribute.

Scott B. Westheimer
General Manager
Gultech North Carolina, Inc.
E-mail: [log in to unmask]
Phone: (919)872-0100
Fax: (919)713-4849
Cell: (919)649-1510
Direct# (919)-713-4830

----- Original Message -----
From: "Kris Keating" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 10, 2001 11:51 AM
Subject: [TN] gold plating contamination


> I have had some parts returned for a contamination/tarnishing on parts
with
> gold plating.  I have attached a photo of the problem.  These parts are
sent
> out for plating and we are having a difficult time identifying a root
cause.
> The problem seems to be different from a "black pad" problem.  The parts
> were plated approximately three months ago, and the tarnish is very
evident.
> I would appreciate some feedback.
> Thank you,
>  <<contaminated gold plating.jpg>>
>
> Kristopher J. Keating
> Technical Service Engineer
> Circuit-Wise, Inc.
> 400 Sackett Point Rd.
> North Haven, CT 06473
> Tel. (203) 281-6511
> Fax (203) 287-8409
>
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