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copper sulphate test for determining that steel is coated

DEAR sir:

Thanks for saving your time to answer my inquiry. I am a metallurgist engineering who works at reverse engineering office of verification establishment. My question is in applying of copper sulphate [on eBay or Amazon]for determination of presence of coating on surface of iron-base alloys, what's the concentration of this solution?

Yours sincerely,

Behnam Vahdat
- Iran

That is not a very good test, since it requires the metal to be very clean and the immersion of copper does not always proceed to a full red, recognizable color. Better to know what coating you are supposed to have on the steel, and use a specific test for it. What coating are you specifying?

Tom Pullizzi
Falls Township, Pennsylvania

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