Identification of the selective corrosion existing at the seam weld of electric resistance-welded pipes

被引：11

作者：

Luo, S. J. ^{[1
]}

Wang, R. ^{[1
]}

机构：

[1] Xian Shiyou Univ, Sch Mat Sci & Engn, Xian 710065, Peoples R China

来源：

CORROSION SCIENCE | 2014年 / 87卷

关键词：

Carbon steel; Welding; Anodic dissolution; GROOVING CORROSION; STEEL; HYDROGEN; CRACKING;

D O I：

10.1016/j.corsci.2014.06.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The selective corrosion existing at the seam weld of high frequency electric resistance welded pipes of carbon steel with low sulfur content in electrolyte solutions is revealed by localized electrochemical measurements. The seam weld, mainly consisted of ferrite, has more negative open circuit potential and higher anodic dissolution current density than the base metal consisting ferrite and pearlite. Between the seam weld and the base metal, there is a galvanic coupling effect accelerating the dissolution kinetics of the seam weld such that V-shaped corrosion groove preferentially occurs at the seam weld. (c) 2014 Elsevier Ltd. All rights reserved.

引用

页码：517 / 520

页数：4