ASTM A380 or A967
Beginning October 2018 Alpha Metal Finishing will offer passivation for stainless steel. Stainless steel derives its corrosion resistant properties from its chromium content. The chromium, in the presence of air (oxygen), forms a thin film of chromium oxide which covers the surface of the stainless steel.
Passivation is a non-electrolytic process which maximizes the natural corrosion resistance of stainless steel. It can remove surface contamination, such as particles of iron-containing shop dirt and iron particles from cutting tools that can form rust or act as initiation sites for corrosion. Alpha uses nitric acid to remove free iron (and dirt) from the surface and this forms an inert, protective oxide layer.
Contact us for more details on stainless passivation. Alpha can help you with a rapid turnaround time and competitive price.