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.
-- Bye. Jasen
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.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.