plastic plating fixture
plastic plating fixture
(OP)
Any good suggestions for a material (plastic) for a manifold for a plating fixture using the following:
1% potassium silver cyanide
1% potassium carbonate
in DI water
This solution comes out to a pH of about 14
Its use will be infrequent but it needs to last a number of rounds of parts. Also a good o-ring / gasket material suggestion for the seals would be appreciated.
thanks
Ron
1% potassium silver cyanide
1% potassium carbonate
in DI water
This solution comes out to a pH of about 14
Its use will be infrequent but it needs to last a number of rounds of parts. Also a good o-ring / gasket material suggestion for the seals would be appreciated.
thanks
Ron





RE: plastic plating fixture
Do you want a rack for holding parts? If so, unless only doing immersion plating, it must be metal for electrical conductivity. Except for contact points, racks are usually coated with a PVC plastisol which is then baked at about 400oF. Maybe powder coating with polyethylene will work for such mild conditions.
I suggest that your solution pH is about 9, and operates at room temperature. Yes?
Almost any plastic will work for tanks & gaskets for a room temperature, slightly alkaline cyanide solution. Natural polypropylene is a common tank material.
But, when all else fails, read the instructions. What does your chemical supplier's product bulletin say?
Technic http://www.technic.com/chm/silver.htm
MacDermid htt
Atotech (formerly M&T Harshaw) http://www.atotech.com/start.php3?cl_my_id=843681