Hi Peter, US normally specifies Co whereas Europe is predominantly Ni. Electrically there are no major differences. Co deposits can be up to 20% harder under certain conditions. I agree about dragout/dragin this is usually controlled by the use of Au strike. Best Regards, Ken Mc Gowan ----- Original Message ----- From: "peter blokhuis" <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, May 16, 2001 6:17 PM Subject: [TN] Cobalt or Nickel hardened gold? > Does anyone know why Cobalt much more prevalent than > Nickel as a hardener in electrolytic gold plating? > > From the plater's perspective, nickel seems to make > more sense since this is dragged into the gold tank > from the nickel plating tank upstream. This dragover > serves as an automatic hardener addition, thus > simplifying process control. > > Do any of you assemblers out there specify Cobalt? Why? > > __________________________________________________ > Do You Yahoo!? > Yahoo! Auctions - buy the things you want at great prices > http://auctions.yahoo.com/ > > -------------------------------------------------------------------------- ------- > 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 ---------------------------------------------------------------------------------