焊管Issue(1)：5-10,6.
近中性土壤溶液中X65管线钢应力腐蚀开裂研究
Study on the Stress Corrosion Cracking of X65 Pipeline Steel in Near-neutral pH Soil Solution
摘要
Abstract
Soil solution was taken from soil samples which were obtained from some western pipeline field in China. Hydrogen immersion test, slow tensile test and stress fluctuation test were conducted in soil solution for X65 pipeline steel. Test data were calculated and SEM of fracture surface and lateral surface of specimens were observed. The susceptibility of SCC of X65 pipeline steel in soil solution was assessed and effects of other mechanical factors on SCC were also studied. Test results showed that X65 pipeline steel is susceptible to SCC in soil solution and hydrogen immersion promotes the susceptibility greatly, and CO2 gas promotes the hydrogen immersion in pipeline steel. Stress fluctuation is with great influence on crack initiation during the preliminary stage of SCC. The secondary stress fluctuation indicated that the effect of alternating load can lead to further extension of crack.关键词
X65管线钢/近中性土壤溶液/应力腐蚀开裂/氢渗透/慢拉伸/应力波动Key words
X65 pipeline steel/near-neutral pH soil solution/stress corrosion crack/hydrogen immersion/slow tensile test/stress fluctuation分类
能源科技引用本文复制引用
涂圣文,帅健,刘德绪..近中性土壤溶液中X65管线钢应力腐蚀开裂研究[J].焊管,2015,(1):5-10,6.基金项目
国家重大科技专项（2011ZX05017-004-HZ04）。 （）
