METAL FINISHING SERVICE
Passivation of Stainless Steel & Corrosion-Resistant Alloys
Chemical passivation treatments for stainless steel and corrosion-resistant alloys per AMS 2700, QQ-P-35, ASTM A967, and MIL-DTL-5002. Type 2, 6, and 8 (Method 1). Removes free iron contamination and restores the natural passive oxide layer.
Passivation is a chemical treatment process that removes free iron and other surface contaminants from stainless steel and corrosion-resistant alloys. During machining, forming, and fabrication, free iron from tooling and fixtures can become embedded in the surface of stainless steel parts. If left untreated, this contamination can initiate corrosion — even on alloys that are inherently corrosion resistant.
Electron Plating III processes passivation to AMS 2700, QQ-P-35, ASTM A967, and MIL-DTL-5002. We perform Type 2, Type 6, and Type 8 treatments using Method 1. The passivation process uses nitric acid or citric acid solutions to dissolve free iron from the surface without attacking the base metal, allowing the natural chromium oxide passive layer to reform and thicken.
Salt spray testing and copper sulfate testing are available to verify treatment effectiveness per customer requirements. All inspection equipment is maintained on a calibration schedule traceable to NIST standards.