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
>
>
>

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