Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel

Shun Watanabe; Tomohiro Sekiguchi; Hiroshi Abe; Yutaka Watanabe

doi:10.1007/978-3-319-67244-1_73

Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel

Shun Watanabe, Tomohiro Sekiguchi, Hiroshi Abe, Yutaka Watanabe

ENG - Quantum Science and Energy Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In Japan, light water reactors are built on the seacoast because they use seawater as the final heatsink. Leakage of seawater from the condenser section of the reactor could lead to contamination of the reactor coolant, and stainless steels can be susceptible to crevice corrosion in chloride-contaminated water. Therefore, it is necessary to develop counter measures for suppressing the initiation of crevice corrosion and for repassivating the corroding crevice to maintain structural reliability. To accomplish this, first the effect of molybdate anion on suppressing the initiation of crevice corrosion on 316L stainless steel in chloride-contaminated water was evaluated by potentiostatic immersion tests. Next, the effect of molybdate anion addition on the repassivation of corroding crevices was also evaluated through potentiostatic immersion tests as a function of the concentration of chloride anion. Based on the results of these examinations, the beneficial effects of the presence of molybdate anion on the suppression of initiation and propagation of crevice corrosion were quantitatively evaluated in terms of critical potentials.

Original language	English
Title of host publication	Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors
Editors	Denise Paraventi, Michael Wright, John H. Jackson
Publisher	Springer International Publishing
Pages	1157-1168
Number of pages	12
ISBN (Print)	9783319672434
DOIs	https://doi.org/10.1007/978-3-319-67244-1_73
Publication status	Published - 2018 Jan 1
Event	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017 - Portland, United States Duration: 2017 Aug 13 → 2017 Aug 17

Publication series

Name	Minerals, Metals and Materials Series
Volume	Part F9
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Other

Other	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017
Country/Territory	United States
City	Portland
Period	17/8/13 → 17/8/17

Keywords

Crevice corrosion
Initiation potential
Molybdate anion
Repassivation potential
Stainless steel

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy Engineering and Power Technology
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/978-3-319-67244-1_73

Cite this

Watanabe, S., Sekiguchi, T., Abe, H., & Watanabe, Y. (2018). Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel. In D. Paraventi, M. Wright, & J. H. Jackson (Eds.), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (pp. 1157-1168). (Minerals, Metals and Materials Series; Vol. Part F9). Springer International Publishing. https://doi.org/10.1007/978-3-319-67244-1_73

Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel. / Watanabe, Shun; Sekiguchi, Tomohiro; Abe, Hiroshi et al.

Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. ed. / Denise Paraventi; Michael Wright; John H. Jackson. Springer International Publishing, 2018. p. 1157-1168 (Minerals, Metals and Materials Series; Vol. Part F9).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Watanabe, S, Sekiguchi, T, Abe, H & Watanabe, Y 2018, Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel. in D Paraventi, M Wright & JH Jackson (eds), Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Minerals, Metals and Materials Series, vol. Part F9, Springer International Publishing, pp. 1157-1168, 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017, Portland, United States, 17/8/13. https://doi.org/10.1007/978-3-319-67244-1_73

Watanabe S, Sekiguchi T, Abe H , Watanabe Y. Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel. In Paraventi D, Wright M, Jackson JH, editors, Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. Springer International Publishing. 2018. p. 1157-1168. (Minerals, Metals and Materials Series). doi: 10.1007/978-3-319-67244-1_73

Watanabe, Shun ; Sekiguchi, Tomohiro ; Abe, Hiroshi et al. / Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel. Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors. editor / Denise Paraventi ; Michael Wright ; John H. Jackson. Springer International Publishing, 2018. pp. 1157-1168 (Minerals, Metals and Materials Series).

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abstract = "In Japan, light water reactors are built on the seacoast because they use seawater as the final heatsink. Leakage of seawater from the condenser section of the reactor could lead to contamination of the reactor coolant, and stainless steels can be susceptible to crevice corrosion in chloride-contaminated water. Therefore, it is necessary to develop counter measures for suppressing the initiation of crevice corrosion and for repassivating the corroding crevice to maintain structural reliability. To accomplish this, first the effect of molybdate anion on suppressing the initiation of crevice corrosion on 316L stainless steel in chloride-contaminated water was evaluated by potentiostatic immersion tests. Next, the effect of molybdate anion addition on the repassivation of corroding crevices was also evaluated through potentiostatic immersion tests as a function of the concentration of chloride anion. Based on the results of these examinations, the beneficial effects of the presence of molybdate anion on the suppression of initiation and propagation of crevice corrosion were quantitatively evaluated in terms of critical potentials.",

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AU - Watanabe, Yutaka

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N2 - In Japan, light water reactors are built on the seacoast because they use seawater as the final heatsink. Leakage of seawater from the condenser section of the reactor could lead to contamination of the reactor coolant, and stainless steels can be susceptible to crevice corrosion in chloride-contaminated water. Therefore, it is necessary to develop counter measures for suppressing the initiation of crevice corrosion and for repassivating the corroding crevice to maintain structural reliability. To accomplish this, first the effect of molybdate anion on suppressing the initiation of crevice corrosion on 316L stainless steel in chloride-contaminated water was evaluated by potentiostatic immersion tests. Next, the effect of molybdate anion addition on the repassivation of corroding crevices was also evaluated through potentiostatic immersion tests as a function of the concentration of chloride anion. Based on the results of these examinations, the beneficial effects of the presence of molybdate anion on the suppression of initiation and propagation of crevice corrosion were quantitatively evaluated in terms of critical potentials.

AB - In Japan, light water reactors are built on the seacoast because they use seawater as the final heatsink. Leakage of seawater from the condenser section of the reactor could lead to contamination of the reactor coolant, and stainless steels can be susceptible to crevice corrosion in chloride-contaminated water. Therefore, it is necessary to develop counter measures for suppressing the initiation of crevice corrosion and for repassivating the corroding crevice to maintain structural reliability. To accomplish this, first the effect of molybdate anion on suppressing the initiation of crevice corrosion on 316L stainless steel in chloride-contaminated water was evaluated by potentiostatic immersion tests. Next, the effect of molybdate anion addition on the repassivation of corroding crevices was also evaluated through potentiostatic immersion tests as a function of the concentration of chloride anion. Based on the results of these examinations, the beneficial effects of the presence of molybdate anion on the suppression of initiation and propagation of crevice corrosion were quantitatively evaluated in terms of critical potentials.

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KW - Initiation potential

KW - Molybdate anion

KW - Repassivation potential

KW - Stainless steel

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Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel

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