Effect of molybdate on crevice corrosion initiation of hydrogen-charged duplex stainless steel

Donghua Suo; Jinming Zhang; Wenbo Wu; Longlin Lei; Yangting Sun; Yiming Jiang; Jin Li

Journal of Materials Research and Technology (Mar 2023)

Effect of molybdate on crevice corrosion initiation of hydrogen-charged duplex stainless steel

Donghua Suo,
Jinming Zhang,
Wenbo Wu,
Longlin Lei,
Yangting Sun,
Yiming Jiang,
Jin Li

Affiliations

Donghua Suo: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China
Jinming Zhang: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China
Wenbo Wu: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China
Longlin Lei: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China; School of Materials Science and Engineering, State Key Lab of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, PR China
Yangting Sun: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China
Yiming Jiang: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China
Jin Li: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, PR China; School of Materials Science and Engineering, State Key Lab of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, PR China; Corresponding author.

Journal volume & issue: Vol. 23
pp. 5329 – 5340

Abstract

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In this paper, we studied the initiation of crevice corrosion of hydrogen-charged 2507 and investigated the effect of different Na2MoO4 concentrations on crevice corrosion. It was found that Na2MoO4 inhibits the adverse effect of hydrogen and enhances the inhibition of crevice corrosion. In addition, hydrogen-charged 2507 crevice corrosion initiates in the austenite phase. While Na2MoO4 improves the crevice corrosion resistance of both phases, crevice corrosion initiation sites changed in reverse, initiating in the ferrite phase.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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