Copper Sulfate LR for passivation test

Chromium and nickel will not be replaced with the Copper sulfate test solution, Only free iron on the surface it will be replaced by the copper, forming the distinctive copper color on the surface in this 6 minute test.

SKU: RXSOL-60-6116-500 Category:


The copper sulfate test is used to detect the presence of metallic iron and iron oxide on the surface of materials.

Question – What solution strength is needed to copper sulfate solution can be used to determine if a metal is stainless steel or just steel ? 
Answer    – Copper sulfate (CuSO4*5H2O) + H2SO4 (anywhere from 1% to 50% is specified in various test methods).