Standard Ferritics - Corrosion Resistance

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Corrosion Resistance

GENERAL CORROSION

U-40910 is significantly more corrosion resistant than mild or low alloy corrosion resistant steels. However, it has a lower corrosion resistance than the higher chromium Standard ferritics. U-409 should only be used in mildly corrosive conditions where aesthetics is not a prime requirement. A light surface patina or discolouration will form in most corrosive environments and this patina will, to some extent, retard further corrosion.

U-430 has good resistance to a wide variety of corrosive environments including nitric acid and some organic acids. It is generally used for highly polished applications and in mild atmospheres such as for food processing and dairy equipment. Atmospheric corrosion resistance is good, although in highly polluted or marine environments staining may occur.

U-439 and U-1.4509 have good resistance to a wide variety of corrosive environments. They are generally used in the automotive industry for exhaust systems. Atmospheric corrosion resistance is good, although in highly polluted or marine environments staining may occur.