Technique for passivating stainless steel

摘要

Stainless steel is "activated" by blasting the metal surface with cast iron grit or cut steel blasting abrasive. Particles of ferrous metal abrasive are embedded in the corrosion resistant steel surface, causing a passive coating to form in a conventional phosphating or oxalating solution. This may be desirable to make the stainless steel surface non-reflective and more corrosion resistant.