CORROSION PROPERTIES OF 3 CR STEELS IN OIL AND GAS ENVIRONMENTS

摘要

Steels containing up to 5% Cr were investigated with respect to their corrosion performance in oil and gas environments. Steels containing 3%Cr or more showed improved corrosion performance over Cr free steel by a factor of two or more in a sweet corrosion environment. 5% Cr steel, however, showed deeper localized corrosion than 3% Cr steel under simulated seawater injection conditions with some oxygen contamination. Although Cr containing steels showed rather poor SSC resistance, the resistance was improved by Mo addition.