Study of criterion for assuring the effectiveness of cathodic protection of buried steel pipelines being interfered with alternative current

被引：13

作者：

He, X. ^{[1
]}

Jiang, G. ^{[1
]}

Qiu, Y. ^{[1
]}

Zhang, G. ^{[2
]}

Jin, X. ^{[2
]}

Xiang, Z. ^{[2
]}

Zhang, Z. ^{[3
]}

Tang, H. ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Coll Chem & Chem Engn, Wuhan 430074, Peoples R China

[2] Huazhong Nat Gas Subsidiary PetroChina Pipeline C, Wuhan 430074, Peoples R China

[3] PetroChina Engn Co Ltd, Dwell Co Ltd, Beijing 100085, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2012年 / 63卷 / 06期

关键词：

AC corrosion; buried pipeline; cathodic protection; criterion; CURRENT CORROSION; MILD-STEEL;

D O I：

10.1002/maco.201006036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Interference of alternative current (AC) on corrosion of X65 steel was investigated in soil. It was observed that the unfavorable effect of interfering AC was able to be effectively inhibited by increasing the direct current density of the cathodic protection (CP) system. A clear correlation was established between the CP current density and the tolerable AC current density. This led to a new criterion for assuring the effectiveness of CP of buried pipelines being interfered with AC. Field experimental results on a buried pipeline running below a 500?kV transmission line showed that the criterion could satisfactorily predict the risk of AC interfering on the CP system.

引用

页码：534 / 543

页数：10

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