Early identification of stress corrosion cracking of P110 low alloy steel in downhole fluid by electrochemical noise measurement

被引：3

作者：

Jiao, Yanbin ^{[1
]}

Zhang, Deping ^{[2
,3
]}

Yu, Jun ^{[1
]}

Lv, You ^{[1
]}

Zhang, Xinxin ^{[1
]}

Dong, Zehua ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol HUST, Sch Chem & Chem Engn, Hubei Key Lab Mat Chem & Serv Failure, 1037 Luoyu Rd, Wuhan 430074, Peoples R China

[2] Northeast Petr Univ, Sch Petr Engn, Daqing, Peoples R China

[3] Natl Energy & CO2 Flooding & Sequestrat Technol R, Jilin Songyuan, Peoples R China

来源：

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2021年 / 56卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Stress corrosion cracking; electrochemical noise; low alloy steel; CO2; corrosion; downhole corrosion; AUSTENITIC STAINLESS-STEEL; X70 PIPELINE STEEL; PITTING CORROSION; CARBON-STEEL; MECHANISM; BEHAVIOR; 304-STAINLESS-STEEL; REPASSIVATION; ENVIRONMENTS; INHIBITION;

D O I：

10.1080/1478422X.2020.1844408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrochemical noise (EN) measurements were applied to detect the stress corrosion cracking (SCC) of API P110 low alloy steel in simulating CO2-containing downhole fluid during the slow strain rate test (SSRT). Several statistical parameters of potential and current transients were defined, and they were proven to be indicative of the metastable and stable pitting, as well as the initiation and propagation processes of microcracks. The EN results showed that the amplitude and lifespan of current transients increase with the CO2 concentration. The increasing SCC susceptibility of P110 steel is mainly attributed to the decreasing pH at the crack tip, which not only accelerated the rupture of passive film on crack walls but also prolonged the lifespan of cracks advance. EN measurement may be a promising technique for the early diagnosis of SCC.

引用

页码：230 / 243

页数：14

共 56 条

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