Can anyone please answer this, and/or point me to a website that gives some details ?
What is that yellowish finishing that is usually given to a steel-based chassis for electronic products ? I assume that it is electroplated on for rust protection and solderability. Specifically, what is the plating material ? Tin ?
Zinc. The colour is a passivation finish. In olden days it was Cadmium. You won't get that now. Plenty of old drawings called up 'Cad & Pass'.
These days I use 'Zinc & clear'. Or actually more likely I use Zintec (tm) electro-galavanised material.
Graham
Perhaps zinc chromate:
chromate:
Thanks, everyone. Now I have some basis do some research on the net.
It might be cadmium, but I don't really know for sure. I would suggest not welding it nor eating off it.
Chris
when I was working at a truck parts factory they called it gold passivation, dunno if adjective or noun.
An adjective, probably. Zinc chromate has that color, and costs a lot less than gold. About the only place you'd find metallic gold in a truck is as plating on electrical contacts in embedded computers.
As in these "Goldscrews"
It's chromate passivated, improves the corrosion resistance and looks nice. But no Au involved.
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