Effects of non-stationary stray current on carbon steel buried pipelines under cathodic protection

被引：28

作者：

Ormellese, Marco ^{[1
]}

Beretta, Silvia ^{[1
]}

Brugnetti, Fabio ^{[2
]}

Brenna, Andrea ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Chim Mat & Ingn Chim G Natta, Via Luigi Mancinelli 7, I-20131 Milan, Italy

[2] Assoc Protez Dalle Corros Elettrolit, APCE, Via Maastricht 1, I-20097 San Donato Milanese, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 281卷

关键词：

Carbon steel; Cathodic protection; Electrochemistry; Pipeline; Polarization; Stray current; RESIDUAL CORROSION RATES; DEFECTS;

D O I：

10.1016/j.conbuildmat.2021.122645

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

DC stray currents may cause severe corrosion on buried carbon steel pipelines even if in cathodic protection. According to international standard anodic interference is unacceptable if the IR-free potential is more positive than the protection potential (-0.85 V CSE). But, duration and magnitude of the anodic peak is not defined. The criterion appears to be too restrictive if short periods of anodic interference are established. This paper deals with the study of the effects of anodic interference on carbon steel in cathodic protection in soil-simulating environment in the presence of DC interference at varying peak current density and duration. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：8

共 29 条

[1] Investigation on corrosion rate and a novel corrosion criterion for gas pipelines affected by dynamic stray current [J].