Atmospheric Corrosion of Stainless Steels

Stainless steels are widely used in applications requiring good atmospheric corrosion resistance.
Atmospheric corrosion varies widely as does the corrosion resistance of different stainless steels. These issues are addressed with reference to the CSIR report (Atmospheric Corrosion Testing in Southern Africa - Results of a Twenty Year Exposure Programme, BG Callaghan, Division of Materials Science and Technology, CSIR).

Atmospheric conditions were classified broadly, according to the corrosiveness.
The corrosion rate of mild steel, corten weathering steel, zinc, copper, aluminium (3103) and stainless steels (3CR12, 430, 304 and 316) were measured in the above environments. This was done at various time intervals from two to 20 years.
Certain metals experienced a variation in corrosion rate over time, but these variations were small compared to the variations between environments or metals.
For more informatiuon on the results, please download Atmospheric Corrosion of Stainless Steels (616 kb)