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Solutions for testing the presence of hard chrome on materials

I am looking for a test that will determine the presents of hard chrome on hardened steel material sometimes it hard to tell if it's polished or hard chrome? Can anyone help ?

Tony A Newman
- OKC. Oklahoma USA
2006

A drop of hydrochloric (muriatic) acid will react with chrome dissolving it with release of bubbles, a green salt and leaving it dull in a matter of 1 min or less. No visible action or change on steels.

Guillermo Marrufo
Monterrey, NL, Mexico
2006

You can use a copper sulphate ⇦ on eBay or Amazon [affil link] solution. An indication of red colour on steel. Good luck .

Khair Shishani
aircraft maintenance - Al Ain, UAE
2006

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