Microscopic polarization behavior of cerium sulfide inclusions in stainless steel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microelectrochemical measurements and thermodynamic calculations were conducted to elucidate the electrochemical properties of CeS inclusions, and the relationship between those properties and pitting corrosion resistance was discussed. CeS inclusions containing ca. 20 at% Cr, (Ce,Cr)S, had better pitting corrosion resistance than (Mn,Cr)S inclusions. The pit initiation at the (Ce,Cr)S inclusion occurred at high potentials, outside the potential range in which the inclusion dissolved. On the other hand, in the case of (Mn,Cr)S inclusions, the pits were initiated in the dissolution potential range of the inclusions. Sulfur species and Ce3+ ions were estimated as the dissolution products from the (Ce,Cr)S inclusions. Stable pit initiation at the (Mn,Cr)S inclusions was inhibited in the Ce3+-containing NaCl solutions, implying that the Ce3+ ions released from (Ce,Cr)S inclusions improve pitting corrosion resistance.

Original languageEnglish
Title of host publicationGeneral Student Poster Session
EditorsP. Pharkaya, W. Sugimoto, W.-S. Yoon, V. Chaitanya, K. Sundaram, A. H. Suroviec, V. Subramanian
PublisherElectrochemical Society Inc.
Pages27-34
Number of pages8
Edition52
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2016 Jan 1
EventSymposium on General Student Poster Session - PRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2016 Oct 22016 Oct 7

Publication series

NameECS Transactions
Number52
Volume75
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherSymposium on General Student Poster Session - PRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period16/10/216/10/7

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Nishimoto, M., Muto, I., Sugawara, Y., & Hara, N. (2016). Microscopic polarization behavior of cerium sulfide inclusions in stainless steel. In P. Pharkaya, W. Sugimoto, W-S. Yoon, V. Chaitanya, K. Sundaram, A. H. Suroviec, & V. Subramanian (Eds.), General Student Poster Session (52 ed., pp. 27-34). (ECS Transactions; Vol. 75, No. 52). Electrochemical Society Inc.. https://doi.org/10.1149/07552.0027ecst