Effect of solution composition and electrochemical potential on stress corrosion cracking of X-52 pipeline steel

被引：50
作者：
Rebak, RB [1 ]
Xia, Z [1 ]
Safruddin, R [1 ]
SzklarskaSmialowska, Z [1 ]
机构：
[1] OHIO STATE UNIV,DEPT MAT SCI & ENGN,FONTANA CORROS CTR,COLUMBUS,OH 43210
来源：
CORROSION | 1996年 / 52卷 / 05期
关键词：
bending; bicarbonate; carbon steel; cold work; electrochemical potential; gas pipelines; hydrogen embrittlement; pH; soil; stress corrosion cracking; sulfate;
D O I：
10.5006/1.3292126
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electrochemical measurements and constant extension rate tests (CERT) of cold-worked X-52 carbon steel showed stress corrosion cracking (SCC) can be induced in aqueous sulfate (SO42-), bicarbonate (HCO3-), and simulated soil solutions at 50 degrees C, Susceptibility to SCC was at a minimum near the corrosion potential (E(corr)) and increased as the cathodic potential increased. SCC decreased at anodic potentials when general metal dissolution or passivation occurred. Cracking was mainly transgranular (TG) at E(corr) and at cathodic potentials, There was strong experimental evidence that SCC was caused by the entrance of atomic hydrogen into the metal.
引用
收藏
页码：396 / 405
页数：10
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