Abstract

Abstract An experimental program was conducted to determine the feasibility of reducing the chromium content in the widely used commercial Type 304 stainless steel and still maintain comparable corrosion resistance. Potentiodynamic anodic polarization characteristics in 1N H2SO4 and NaCI solutions were selected as the prime criteria to predict the corrosion resistance of the experimental alloys. Results showed that passivation deteriorated markedly upon removal of chromium from Type 304 stainless steel. Alloy substitutes of Mo and Si were effective in improving the passivation behavior of a stainless steel alloy with 12% Cr. Although Al led to further deterioration of corrosion properties when added to the 12% Cr alloy, an improvement in anodic polarization characteristics was noted when Al was combined with Mo. An optimized composition, austenitic alloy exhibited anodic polarization corrosion properties comparable to those of a commercial Type 304 stainless steel alloy. The optimized composition was 12Cr...

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