Q. Is there a method for stripping copper-nickel-chrome deposits from rejected zinc diecastings? K.G.
A. I have not come across a process that does a good job stripping this deposit of zinc diecasts. Most likely, you can strip the chrome from the nickel and the nickel from the copper, but removing copper from a zinc diecast would be very difficult at best, and, based on what I have observed, not very reliable. Check out the article “Stripping of Plated Finishes” from the Products Finishing Directory and Technology Guide at PFonline.com/articles/stripping-of-plated-finishes for some helpful hints on stripping processes in general.
Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.
The processes, chemicals and equipment, plus control and troubleshooting.
A primer on this inexpensive and highly efficient process.