Combined effect of cathodic potential and sulfur species on calcareous deposition, hydrogen permeation, and hydrogen embrittlement of a low carbon bainite steel in artificial seawater

被引：122

作者：

Tian, Huiyun ^{[1
]}

Xin, Juncheng ^{[1
]}

Li, Yong ^{[2
]}

Wang, Xin ^{[1
]}

Cui, Zhongyu ^{[1
]}

机构：

[1] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Shandong, Peoples R China

[2] Univ Sci & Technol Beijing, Corros & Protect Ctr, Beijing 100083, Peoples R China

来源：

CORROSION SCIENCE | 2019年 / 158卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Low alloy steel; Hydrogen permeation; SEM; Cathodic protection; Hydrogen embrittlement; STRESS-CORROSION CRACKING; DUPLEX STAINLESS-STEEL; SULFATE-REDUCING BACTERIA; HIGH-STRENGTH STEEL; X70 PIPELINE STEEL; LOW-ALLOY STEELS; ELECTROCHEMICAL CORROSION; PASSIVATION BEHAVIOR; INDUCED PLASTICITY; SURFACE-CHEMISTRY;

D O I：

10.1016/j.corsci.2019.07.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Calcareous deposition, hydrogen permeation, and hydrogen embrittlement of E690 steel in thiosulfate-containing artificial seawater (ASW) under cathodic polarization are investigated. Sulfur species in acidic ASW eliminate the aragonite precipitation, attributed to the variation of cathodic reaction, favorable adsorption of HS- and enhanced hydrogen evolution. The maximum permeation current was achieved at - 850 mV(SCE )due to the change of interfacial pH and promotion ability of sulfur species. Hydrogen embrittlement susceptibility increases linearly with logarithm increase of hydrogen concentration, while the preferential cracking pathway evolves from lath boundary separation at low hydrogen concentration to prior austenite grain boundary failure at high concentrations.

引用

页数：20

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