Effect of cathodic protection potential fluctuations on pitting corrosion of X100 pipeline steel in acidic soil environment

被引：55

作者：

Dai, Mingjie ^{[1
]}

Liu, Jing ^{[1
]}

Huang, Feng ^{[1
]}

Zhang, Yaohua ^{[1
]}

Cheng, Y. Frank ^{[1
,2
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China

[2] Univ Calgary, Dept Mech & Mfg Engn, Calgary, AB T2N 1N4, Canada

来源：

CORROSION SCIENCE | 2018年 / 143卷

基金：

中国国家自然科学基金;

关键词：

Carbon steel; SEM; Polarization; Cathodic protection; Pitting corrosion; SQUARE-WAVE; X70; STEEL; INTERFERENCE; POLARIZATION;

D O I：

10.1016/j.corsci.2018.08.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of frequency and time of cathodic protection potential fluctuations on pitting corrosion of X100 pipeline steel was investigated by square wave polarization (SWP) and theoretical calculations. Results demonstrate that pitting corrosion can occur on the cathodically polarized steel and primarily produce on the steel matrix rather than non-metallic inclusions. The pit density increases with the total loading time of the SWP potential (t(t)) under identical SWP period (T). With the extended T, the density of pits decreases under the same t(t). The current and potential equations in the time and frequency domains are derived from calculation.

引用

页码：428 / 437

页数：10

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