Paul, I'd say given the rotary nature of application you can really speed up the life test quite easily with a motor and counter , just watch the friction temp . The possible oxide consideration (build up between cycles on nickel) is not so pronounced on rotary (or slide) application . Therefore you can test any surface sample you desire , the flash gold does vary from manufacturer to manufacturer . For that reason alone standardised specs would not supersede life test . Give it a shoot (test) , we get good yields from NiAu on switching (carbon pads, touch&skid) See you paul >---------- >From: Paul Gould[SMTP:[log in to unmask]] >Sent: Tuesday, 24 March 1998 4:14 >To: [log in to unmask] >Subject: [TN] FAB: Electroless Nickel/Immersion Gold for rotary contacts > ><<File: ATT00247.html>> >Has anyone any experience of using electroless nickle/immersion gold finish >on rotating wiper contact areas of the pwb. Is there a spec which permits >this. I have made circuits for wahing machines with immersion gold on copper >and that worked with a life of about 10 years, but that was more than 20 >years ago. The problem is the cost of hard plating selected areas. > >Any thoughts on this would be appreciated. > >Paul Gould > > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################