What chemicals can identify the stainless steel?Experts teach us a stainless steel's simple identification method, copper sulfate point test. Copper sulfate point test is the most simple method to distinguish quickly between ordinary carbon steel and all kinds of stainless steel. The concentration of a solution of copper sulfate used is 5~10%.
Before the points test,the test area should be thoroughly removed grease or all kinds of material and polish a small area with soft grinding cloth, then drip copper sulfate solution to the cleaning area with a dropping bottle. ordinary carbon steel or iron will form a layer of metal copper surface in a few seconds, while the surface of the stainless steel does not produce copper precipitation or display the color of copper.
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