Passivating stainless steel maximizes its inherent corrosion resistance by removing free iron and other contaminants from the surface and promoting the formation of a stable, protective chromium oxide layer. At Buffalo Processing we use a Citric Acid solution to perform passivation following ASTM A967 and AMS 2700 guidelines.

Aluminum hexavalent chemical conversion coating provides excellent corrosion resistance, acts as a primer for subsequent paint or adhesive layers, and maintains a high degree of electrical conductivity. At Buffalo Processing we use a hexavalent chromium solution, creating a gold/brown coating to enhance corrosion protection for aluminum and aluminum alloys. Buffalo Processing follows MIL-DTL-5541 Type I guidelines for this process.

Aluminum trivalent chemical conversion coating provides excellent corrosion resistance, acts as a primer for subsequent paint or adhesive layers, and maintains a high degree of electrical conductivity. At Buffalo Processing we use a trivalent chromium solution, creating a clear coating to enhance corrosion protection for aluminum and aluminum alloys, without the use of harmful hexavalent chromium. Buffalo Processing follows MIL-DTL-5541 Type II guidelines for this process.

Black oxide coating provides corrosion resistance, a comfortable and non-dazzling matte black appearance, and improved lubricity by absorbing oil. Buffalo processing uses a room temperature black oxide solution and two different sealers based on finishing requirements. Sealants can create a slightly oily or non-oily feeling to the parts.