MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Influence of Oxygen Content on the Inclusion Formation and Pitting Corrosion Resistance of Hyper Duplex Stainless Steels
Soon-Hyeok JeonDo Haeng HurHye-Jin KimYong-Soo Park
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2014 Volume 55 Issue 12 Pages 1872-1877

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Abstract

To determine the influence of oxygen content on the formation of inclusion in 27Cr-7Ni hyper duplex stainless steel, samples were analyzed by scanning electron microscopy. Electrochemical tests were also conducted, which revealed that an increase in oxygen content reduces the resistance to pitting corrosion of the alloys. This was attributed to the formation of numerous inclusions, as well as an increase in the area of micro-crevices that occur between the inclusion and metallic matrix, and which act as initiation sites for corrosion pits.

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© 2014 The Japan Institute of Metals and Materials
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