Effect of Rare Earth on the Inclusions and Pitting Resistance of Ferrite Stainless Steel

Xiao Liu; Jian She Li

doi:10.4028/www.scientific.net/AMR.531.47

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 531Effect of Rare Earth on the Inclusions and Pitting...

Effect of Rare Earth on the Inclusions and Pitting Resistance of Ferrite Stainless Steel

Abstract:

The anodic polarization curves of 430 ferrite stainless steels with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of RE on pitting corrosion resistance of 430 ferrite stainless steels has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES after adding RE to 430 ferrite stainless steesl. RE makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped RE inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 430 ferrite stainless steels.

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Periodical:

Advanced Materials Research (Volume 531)

Pages:

47-50

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.531.47

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Online since:

June 2012

Authors:

Xiao Liu, Jian She Li

Keywords:

Anodic Polarization Curve, Ferrite Stainless Steel, Inclusion, Rare Earth (RE)

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