Effects of rare earth metals addition on the resistance to pitting corrosion of super duplex stainless steel - Part 1 |
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Authors: | Soon-Tae Kim |
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Affiliation: | Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea |
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Abstract: | To elucidate the effects of rare earth metals addition on the resistance to pitting corrosion of super duplex stainless steel, a metallographic examination, potentiodynamic and potentiostatic polarization tests, a SEM-EDS and a SAM analysis of inclusion, austenite phase and ferrite phase were conducted. The addition of rare earth metals to the base alloy led to the formation of (Mn, Cr, Si, Al, Ce) oxides and (Mn, Cr, Si, Ce) oxides, which improved the resistance to pitting corrosion and caused a decrease in the preferential interface areas for the initiation of the pitting corrosion. |
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Keywords: | A Rare earth elements A Stainless B Potentiostatic B SEM C Inclusion C Pitting corrosion |
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