Influence of MC carbides on pitting corrosion resistance of weld metal in austenitic stainless steels

Kadoi, Kota*; Kanno, Yudai*; Aoki, So ; Inoue, Hiroshige*

The influence of the chemical composition on the pitting corrosion in the weld metal of austenitic stainless steel were investigated. The specimens containing higher content of chromium and molybdenum showed the lower the reactivation rate. The addition of titanium drastically deteriorated the pitting corrosion resistance. The chromium depleted region was formed near the carbide such as M $_{23}$ C $_{6}$ and TiC. Besides, TiC phase which formed during solidification acted as nucleation sites for M $_{23}$ C $_{6}$ precipitation. The depleted region caused by chromium diffusion because of the M $_{23}$ C $_{6}$ precipitation, induced to deteriorate the pitting corrosion resistance.

Language	:	English
Journal	:	ISIJ International
Volume	:	64
Number	:	9
Pages	:	p.1450 - 1456
Publication Year/Month	:	2024/07
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Paper URL	:	https://doi.org/10.2355/isijinternational.ISIJINT-2024-067
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InCites™	:	Percentile:35.25 Category:Metallurgy & Metallurgical Engineering
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Registration No. : AA20221050
JAEA Abstracts No. : 52000919
Paper Submission No. : 28340

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