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 > > > >------------------------------------------------------------------------- > -------- > >Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > >To unsubscribe, send a message to [log in to unmask] with following text in > >the BODY (NOT the subject field): SIGNOFF Technet > >To temporarily halt delivery of Technet send the following message: SET > >Technet NOMAIL > >Search previous postings at: www.ipc.org > On-Line Resources & Databases > > > >E-mail Archives > >Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > >information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > >ext.5315 > >------------------------------------------------------------------------- > -------- > > > > -------------------------------------------------------------------------- > ------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt delivery of Technet send the following message: SET > Technet NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > ext.5315 > -------------------------------------------------------------------------- > ------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------