X70钢在鹰潭酸性土壤中的应力腐蚀行为

刘智勇; 翟国丽; 杜翠薇

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X70钢在鹰潭酸性土壤中的应力腐蚀行为

材料科学与工程 | 更新时间：2023-11-28

- X70钢在鹰潭酸性土壤中的应力腐蚀行为
- SCC of X70 Pipeline Steel in Yingtan Acid Soil Environment
- 工程科学与技术 2008年40卷第2期页码：76-81
- 作者机构：
  
  北京科技大学腐蚀与防护中心,北京市腐蚀、磨蚀与表面技术开放实验室北京,100083
- 作者简介：
- 基金信息：
  
  国家科技基础平台建设项目(2005DKA 10400);国家十五重大基金三级课题资助项目(50499333-08)
- DOI：
  中图分类号：
- 纸质出版日期：2008，
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刘智勇,翟国丽,杜翠薇.X70钢在鹰潭酸性土壤中的应力腐蚀行为[J].工程科学与技术,2008,40(2):76-81.

SCC of X70 Pipeline Steel in Yingtan Acid Soil Environment[J]. Advanced Engineering Sciences, 2008,40(2):76-81.
刘智勇,翟国丽,杜翠薇.X70钢在鹰潭酸性土壤中的应力腐蚀行为[J].工程科学与技术,2008,40(2):76-81. DOI：

SCC of X70 Pipeline Steel in Yingtan Acid Soil Environment[J]. Advanced Engineering Sciences, 2008,40(2):76-81. DOI：

摘要

中文摘要: 在不同的阴极保护电位下，采用慢应变速率拉伸试验（SSRT）和电化学方法研究X70钢在水饱和鹰潭土壤中的应力腐蚀开裂行为，为酸性土壤地区的X70钢管线的腐蚀防护提供基础参考数据。结果表明

X70钢在实验所用的酸性土壤环境中能够发生穿晶应力腐蚀裂纹（TGSCC）；SCC萌生与外加保护电位有关，外加电位较高、X70钢完全受阳极过程控制时的SCC敏感性较低；外加电位较低、X70钢受阴阳极混合电极过程控制或完全受阴极过程控制时均能发生SCC，且其敏感性随外加电位的降低而增加，且完全受阴极过程控制时的SCC敏感性大大高于其它情况。

Abstract

Abstract:In order to study the SCC susceptibility and obtain basic data for corrosion protection of X70 pipeline steel in the acid soil environment of Yingtan

China

slow strain rate test(SSRT) and polarization curves were used to studied the SCC of X70 steel. SCC did occur to the as received material

with a transgranular cracking mode charged with different cathodic potential. The applied cathodic polarization potential played an important role in facilitating the occurrence of SCC. X70 pipeline steel was little sensitive to SCC in an anodic potential condition

but as the applied cathodic potential went down

a combined electrochemical reaction of anode and cathode or a cathode process at even lower potential controlled the corrosion behaviour of X70 steel

and SCC took place.

关键词

X70钢应力腐蚀开裂酸性土壤

Keywords

X70 pipeline steelSCCacid soil environment

references

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