Effects of electropulsing on inclusion size and corrosion-resistance of 304 stainless steel

Electropulsing has been imposed on molten AISI 304 stainless steel and its effects on the inclusion size and corrosion properties have been investigated. The average size of inclusions in electropulsing-treated samples was finer than that in untreated ones. A theoretical analysis shows that the mobi...

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Bibliographic Details
Published in:Materials science and technology 2020-08, Vol.36 (12), p.1263-1271
Main Authors: Jia, Danbin, Zhong, Liangcai, Yu, Jingkun, Zhou, Yuting, Liu, Zhaoyang, Tian, Chen, Wang, Jiawei, Dai, Wenbin
Format: Article
Language:English
Subjects:
Electropulsing
inclusions
pitting corrosion resistance
Type 304
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Summary:Electropulsing has been imposed on molten AISI 304 stainless steel and its effects on the inclusion size and corrosion properties have been investigated. The average size of inclusions in electropulsing-treated samples was finer than that in untreated ones. A theoretical analysis shows that the mobility of solute atoms increases with electropulsing treatment. This promotes the nucleation of inclusions. Owing to a smaller inclusion size, the electrochemical experiments reveal that the pitting corrosion resistance of the electropulsing-treated stainless steel is significantly improved. The beneficial effects of electropulsing on the refinement of inclusions and the resistance to pitting corrosion increase with an increase in current density. Electropulsing treatment, therefore, provides a promising means to improve pitting corrosion resistance.
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2020.1772536