[01] P. Saravanan, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai, India. [02] V. S. Raja, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai, India.

Corrosion behavior of 19Cr-18Mn-0.69N austenitic stainless steel (SS) developed by electroslag refining process (ESR) was studied by cyclic polarization technique in 3.5% NaCl solution and was compared with that of the other two austenitic stainless steels having different compositions namely, Type 316L SS and 14Cr-8-Mn SS. The results showed that 19Cr-18Mn-0.69N austenitic stainless steel far exhibits higher pitting potential as compared to that of the other two alloys. The ESR melted alloy also better crevice resistance than that of Type 316L SS and 14Cr-8-Mn SS alloy. However, the degree of improvement in the crevice corrosion resistance of ESR melted alloy over the remaining two alloys is lower than that obtained with regards to pitting corrosion resistance. The high pitting and crevice corrosion resistance of ESR melted alloy, in spite of its higher sulfur content than similar alloys published in literature, is attributed to the ability of ESR technique to minimize the sulfur inclusions in stainless steels.

Electroslag Refining Process, High Manganese High Nitrogen Stainless Steel, 3.5% NaCl

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