Q. I am looking for a quick test to determine if a nickel plate has been completely removed from a steel substrate. B. J.
A. This question comes up from time to time. There are sophisticated instrument-based methods that you can use to determine the presence of nickel on a substrate. However, sometimes a simple, straightforward test will give you an answer. In this case, the simplest way to make a determination is to dip the part in a copper sulfate solution. An immersion deposit of copper will form on bare steel. Areas with nickel on the surface will not form a copper immersion deposit. The deposit can be wiped off after the test.
Why is it important for you to know this?
An overview of precious metal electroplating processes.
The reasons for installing an in-house cold blackening system are many and varied.