Cerium addition to CaS inclusions in stainless steel: Insolubilizing water-soluble inclusions and improving pitting corrosion resistance

Masashi Nishimoto; Izumi Muto; Yu Sugawara; Nobuyoshi Hara

doi:10.1016/j.corsci.2020.109222

Cerium addition to CaS inclusions in stainless steel: Insolubilizing water-soluble inclusions and improving pitting corrosion resistance

Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

ENG - Materials Science

Tohoku University

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Pit initiation behavior at Ce-added and Ce-free CaS inclusions in Type 304 L stainless steel was investigated by microelectrochemical measurements. Stainless steel specimens containing artificial Ce-added and Ce-free CaS inclusions were fabricated by spark plasma sintering. The pit initiation resistance at the Ce-added CaS inclusions was higher than that at the Ce-free CaS inclusions. The surface of the Ce-free CaS inclusions largely dissolved during immersion in 0.1 M NaCl, while a large part of the Ce-added CaS inclusions remained undissolved. Thermodynamic calculation showed that CeS is less soluble than CaS.

Original language	English
Article number	109222
Journal	Corrosion Science
Volume	180
DOIs	https://doi.org/10.1016/j.corsci.2020.109222
Publication status	Published - 2021 Mar

Keywords

Microelectrochemical measurements
Pitting corrosion
Spark plasma sintering
Stainless steel
Sulfide inclusion

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10.1016/j.corsci.2020.109222

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title = "Cerium addition to CaS inclusions in stainless steel: Insolubilizing water-soluble inclusions and improving pitting corrosion resistance",

abstract = "Pit initiation behavior at Ce-added and Ce-free CaS inclusions in Type 304 L stainless steel was investigated by microelectrochemical measurements. Stainless steel specimens containing artificial Ce-added and Ce-free CaS inclusions were fabricated by spark plasma sintering. The pit initiation resistance at the Ce-added CaS inclusions was higher than that at the Ce-free CaS inclusions. The surface of the Ce-free CaS inclusions largely dissolved during immersion in 0.1 M NaCl, while a large part of the Ce-added CaS inclusions remained undissolved. Thermodynamic calculation showed that CeS is less soluble than CaS.",

keywords = "Microelectrochemical measurements, Pitting corrosion, Spark plasma sintering, Stainless steel, Sulfide inclusion",

author = "Masashi Nishimoto and Izumi Muto and Yu Sugawara and Nobuyoshi Hara",

note = "Funding Information: This work was supported by JSPS KAKENHI (grant Nos. JP17H01331 and JP17J03625 ). This work was also supported by the Program for Leading Graduate Schools, “Interdepartmental Doctoral Degree Program for Multi-dimensional Materials Science Leaders, Tohoku University,” MEXT, Japan . Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = mar,

doi = "10.1016/j.corsci.2020.109222",

language = "English",

volume = "180",

journal = "Corrosion Science",

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T1 - Cerium addition to CaS inclusions in stainless steel

T2 - Insolubilizing water-soluble inclusions and improving pitting corrosion resistance

AU - Nishimoto, Masashi

AU - Muto, Izumi

AU - Sugawara, Yu

AU - Hara, Nobuyoshi

N1 - Funding Information: This work was supported by JSPS KAKENHI (grant Nos. JP17H01331 and JP17J03625 ). This work was also supported by the Program for Leading Graduate Schools, “Interdepartmental Doctoral Degree Program for Multi-dimensional Materials Science Leaders, Tohoku University,” MEXT, Japan . Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/3

Y1 - 2021/3

N2 - Pit initiation behavior at Ce-added and Ce-free CaS inclusions in Type 304 L stainless steel was investigated by microelectrochemical measurements. Stainless steel specimens containing artificial Ce-added and Ce-free CaS inclusions were fabricated by spark plasma sintering. The pit initiation resistance at the Ce-added CaS inclusions was higher than that at the Ce-free CaS inclusions. The surface of the Ce-free CaS inclusions largely dissolved during immersion in 0.1 M NaCl, while a large part of the Ce-added CaS inclusions remained undissolved. Thermodynamic calculation showed that CeS is less soluble than CaS.

AB - Pit initiation behavior at Ce-added and Ce-free CaS inclusions in Type 304 L stainless steel was investigated by microelectrochemical measurements. Stainless steel specimens containing artificial Ce-added and Ce-free CaS inclusions were fabricated by spark plasma sintering. The pit initiation resistance at the Ce-added CaS inclusions was higher than that at the Ce-free CaS inclusions. The surface of the Ce-free CaS inclusions largely dissolved during immersion in 0.1 M NaCl, while a large part of the Ce-added CaS inclusions remained undissolved. Thermodynamic calculation showed that CeS is less soluble than CaS.

KW - Microelectrochemical measurements

KW - Pitting corrosion

KW - Spark plasma sintering

KW - Stainless steel

KW - Sulfide inclusion

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JO - Corrosion Science

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ER -

Cerium addition to CaS inclusions in stainless steel: Insolubilizing water-soluble inclusions and improving pitting corrosion resistance

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Keywords

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