Stress corrosion cracking of X80 pipeline steel in simulated alkaline soil solution

被引：100

作者：

Liang, Ping ^{[1
,2
]}

Li, Xiaogang ^{[1
]}

Du, Cuiwei ^{[1
]}

Chen, Xu ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China

来源：

MATERIALS & DESIGN | 2009年 / 30卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Pipeline steel; Brittle fracture; Hydrogen assisted cracking; Stress corrosion cracking; NEAR-NEUTRAL-PH; HYDROGEN EVOLUTION REACTION; X-65; PIPELINE; SCC; MECHANISM; FAILURES;

D O I：

10.1016/j.matdes.2008.07.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress corrosion cracking susceptibility of X80 steel under applied cathodic potentials in a simulated soil solution was investigated using slow strain rate tensile tests. The fracture surfaces were observed by scanning electron microscopy. No apparent change of reduction in area was found at -775 mV in contrast to the open circuit potential. Many dimples were visible on both fracture surfaces. However, when the applied potentials were lower than -1000 mV, the SCC susceptibility increased as a result of evolution hydrogen, which diffuses into the steel. Pitts were found to be an important factor in the initiation of cracks. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1712 / 1717

页数：6

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