Effect of alternating current frequency on corrosion behavior of X80 pipeline steel in soil extract solution of Dagang

被引：10

作者：

Qin, Qingyu ^{[1
,2
,3
]}

Wei, Boxin ^{[1
,2
,3
]}

Bai, Yunlong ^{[1
,3
]}

Nan, Li ^{[1
]}

Xu, Jin ^{[1
,3
]}

Yu, Changkun ^{[1
,3
]}

Sun, Cheng ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Liaoning Shenyang Soil & Atmosphere Corros Mat Na, Shenyang 110016, Peoples R China

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2020年 / 179卷

基金：

中国国家自然科学基金;

关键词：

X80 pipeline steel; Soil extract solution; AC frequency; Pitting corrosion; AC-INDUCED CORROSION; STRAY CURRENT; X70; STEEL; STRESS; CRACKING; MECHANISM; VOLTAGE;

D O I：

10.1016/j.ijpvp.2019.104016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of AC frequencies on corrosion behavior of X80 pipeline steel was investigated in soil-extract solution of Dagang using polarization curves, electrochemical impedance spectroscopy, weight-loss test and surface analysis techniques. Results show that the corrosion potential of X80 pipeline steel shift in the negative direction under the effect of AC. The maximum pitting depth and corrosion rate of the steel specimen decrease with the AC frequency increasing, and there is a function relationship, y = 45.63x(-0.5), between the maximum pitting depth and the AC frequency. The alternating current just like an oxidant changes the component proportion of corrosion products rather than the types due to AC rectification.

引用

页数：12

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