Hello,
I am trying to do a nitric acid porosity test on gold plating, but the lab
here does not have sodium sulfide crystals to make a polysulfide reagent for
the test.  Is there a suitable substitute reagent that can be used for this?

Kris

> -----Original Message-----
> From: Mark Mazzoli [SMTP:[log in to unmask]]
> Sent: Thursday, December 13, 2001 3:50 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] porosity of gold plating on nickel
>
> Hi Kris,
> Try IPC TM-650 2.3.24.2 Nitric Vapor Test.  That's the easiest one I'm
> aware of.
> Here's a link:http://www.ipc.org/html/2.3.24.2.pdf
>
> Mark Mazzoli
>
>
>
>
>
>
> At 02:30 PM 12/13/01 -0500, you wrote:
> >Does anyone know of a fairly simple method of determining porosity of
> gold
> >plating over nickel on a PCB?
> >
> >
> >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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