Stripping Tin from Copper
Q. I recently received some old tin-plated copper to be replated. What methods can remove the old tin layer without harming the copper? S.Y.
A. The usual method for stripping tin from copper is to use a sodium hydroxide solution with a concentration of approximately 100 g/L at 75–150°F. The part to be stripped is made anodic and a steel anode is used. Voltage should be approximately 6v. If the temperature of the solution is too high, the copper base will be
A review of available test methods, common applications and innovative instrumentation...
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.
Applications, plating solutions, brighteners, good operating practices and troubleshooting.