Effects of pH on the Electrochemical Behavior and Stress Corrosion Cracking of X80 Pipeline Steel in Simulated Alkaline Soil Solution

被引：10

作者：

Liang, Ping ^{[1
]}

Guo, Yier ^{[1
]}

Qin, Hua ^{[1
]}

Shi, Yanhua ^{[1
]}

Li, Fei ^{[1
]}

Jin, Lan ^{[1
]}

Fang, Zheng ^{[1
]}

机构：

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

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2019年 / 14卷 / 07期

关键词：

X80 Pipeline Steel; pH; General Corrosion; Pitting Corrosion; Stress Corrosion Cracking; DILUTE BICARBONATE SOLUTION; DISBONDED COATINGS; CREVICE CORROSION; INITIATION; MECHANISM; FILM;

D O I：

10.20964/2019.07.09

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior of X80 pipeline steel in alkaline soil solution with different pH value was studied by mean of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results of electrochemical measurements showed that the general corrosion and pitting corrosion resistance of X80 pipeline steel increased with increasing pH, which could be attributed to formation of a protective FeCO3 film in the solution (pH >= 11.0). Stress corrosion cracking susceptibility decreased with increasing pH during the slow strain rate tensile tests. The pits were found to be an important factor in the initiation of transgranular cracks below pH=10.0. However, when pH>10, intergranular cracking occurred because of selective dissolution at grain boundaries

引用

页码：6247 / 6256

页数：10

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