Anodic behavior of 18Cr-5Ni steels containing 0.03 to 15% Mn was studied in 0.1N H2SO4 solution with additions of 0.01 to 0.1N NaCl. The presence of 5.7 to 15% Mn in those steels decreases their ability to passivate and their resistance to pitting. The most susceptible locations for pit nucleation are boundaries between the austenite matrix and the carbide particles. The pitting resistance of chromium-nickel-manganese steels is discussed with respect to their phase compositions.

Subject
Pits, Carbides, Corrosion resistant alloys, Composition, Stainless alloys, Nickel based alloys, Nucleation, Current densities, Steel, Pitting, Passivation, Corrosion resistance, Stainless steel
© 1975 National Association of Corrosion Engineers
1975
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