Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel
Metals, ISSN: 2075-4701, Vol: 14, Issue: 4
2024
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Taiyuan University of Technology Researcher Focuses on Nitrogen (Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel)
2024 APR 11 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- Fresh data on nitrogen are presented in
Article Description
6Mo super austenitic stainless steel (SASS) with nitrogen contents of 0.2 and 0.4 (wt.%) was melted, and solution treatments at 1100, 1180, and 1250 °C for 30 min were performed. The effects of nitrogen on the microstructure and pitting resistance of the two steels that signed as 0.2N and 0.4N samples were investigated. At a heat-treatment temperature of 1180 °C, the alloy demonstrates the highest corrosion resistance, attributed to the combined effects of grain size and precipitates. The structure of the passivation film changes with increasing nitrogen content, with the Cr/Fe ratio is significantly higher in the 0.4N sample compared to the 0.2N sample. Moreover, the increase in nitrogen content results in thicker Cr and Mo oxide layers and higher levels of NH and NH, thereby improving the corrosion resistance of the stainless steel.
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