Passivation

Temperature, time and concentration are the key issues for performing Chemical Passivation. There are no dimensional changes or visual changes on the product. What it does do is enhance the corrosion resistance of stainless steel. This process removes iron or iron compounds from the surface of stainless steel by means of chemical dissolution usually by treating in an acid solution. Treating the surface with a mild oxidant enhances the formation of the protective passive film. This process removes surface contamination but not to the degree of affecting the stainless steel itself.

Modern Metal Finishing has the technical staff to carefully control and maintain the Passivation solution, which is crucial for the successful application of this process. Our staff is also capable of performing the most commonly specified coating verification tests such as the copper sulfate test or the two-hour salt spray test, which were an integral part of Federal Specification QQ-P-35C and are important requirements of ASTM A-967 and ASTM A-380. Our staff understands the different Stainless Alloys and how they react with temperature, time and concentration of the passivation solutions.

Modern Metal Finishing takes the time to understand the different alloys you may be working with. We are careful to analyze the concentrations prior to processing and we have controls in place to verify temperature. With these guidelines, we should help you achieve the maximum performance and corrosion resistance of your stainless alloys.