Passivation

ASTM A 967 M REV 17 Citric or Nitric Acid

Passivation is a surface treatment process that removes steel and carbon particles while forming a protective layer on the surface, and is intended to slow down corrosion. Passivation can be achieved by nitric or citric acid treatment, depending on the required specification or the alloy used.

Main uses

  • This process is commonly used for aluminum parts in the automotive and aerospace industries.

Types of treatable metals

  • Stainless steel

Advantages and benefits

  • Increasing corrosion resistance and evening out surface finish.