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 > > -------------------------------------------------------------------------- ------- > 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 ---------------------------------------------------------------------------------