test for chrome after stripping operation

[djhurayt]

We have chromium stripped from some components for rework. Is there a test to determine if all the chromium has been removed?

TIA
david

 

[djhurayt]

Did I say something wrong? This is not my field so maybe there is no test. Anybody ??? hello ??? am I alone in here ???

 

[swall]

What is the substrate?

 

[djhurayt]

52100 (bearing steel) HRc 58-62

 

[btrueblood]

Um. That is an alloy with about 1.5% Chromium content by design, not sure you will be able to "strip" it of chrome without dissolving the part in acid, at which point the part is gone...

https://www.azom.com/article.aspx?ArticleID=6704

 

[swall]

A copper sulfate solution is commonly used to show presence or absence of plating after a stripping operation on ferrous substrates. In the absence of plating, the copper sulfate will "plate out" copper on the substrate. The copper can then be removed after the test with house hold ammonia