Coupling Effect of Precipitates and Hydrogen on Pitting Corrosion of Stainless Steel

被引：0

作者：

Liu, Ming ^{[1
,2
]}

Yao, Guanghu ^{[2
]}

Wang, Xuehan ^{[2
]}

Xu, Lining ^{[1
,2
]}

Jiao, Lang ^{[2
]}

Su, Hang ^{[3
,4
]}

Fu, Anqing ^{[3
,4
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Nucl Power Safety Technol & Equipmen, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[3] Tubular Goods Res Inst CNPC, State Key Lab Performance & Struct Safety Petr Tub, Xian 710077, Peoples R China

[4] Key Lab Petr Tubular Goods & Equipment Qual Safety, Xian 710077, Peoples R China

来源：

CORROSION | 2024年 / 80卷 / 08期

基金：

中国国家自然科学基金;

关键词：

hydrogen; pitting corrosion; precipitate; stainless steel; ANODIC-DISSOLUTION; PASSIVE FILM; EMBRITTLEMENT; DIFFUSION;

D O I：

10.5006/4549

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigated the coupling effect of hydrogen and precipitates on the initiation of pitting using HR3C stainless steel with large NbCrN precipitates as the study material. Stainless steel exhibited good resistance to pitting when not subject to hydrogen charging. Hydrogen charging significantly reduced the corrosion resistance and stability of the passive film. Results obtained using the hydrogen microprint technique revealed that hydrogen was enriched within NbCrN precipitates and along the precipitate/substrate interface. Through immersion experiments, we discovered that pits preferentially initiated at the precipitate/substrate interface because they had weaker corrosion resistance than the precipitates.

引用

页码：818 / 827

页数：10

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