管线钢在近中性pH值溶液中的应力腐蚀开裂

腐蚀科学与防护技术, 2001, 13(2): 71-73. doi: 10.3969/j.issn.1002-6495.2001.02.003

管线钢在近中性pH值溶液中的应力腐蚀开裂

汪兵 ^1, , 刘素娥 ^2, , 朱自勇 ^3, , 柯伟 ^4, , 韩恩厚 ^5,

1.中国科学院金属研究所

2.中国科学院金属研究所

3.中国科学院金属研究所

4.中国科学院金属研究所

5.中国科学院金属研究所

基金项目: 国家重点基础研究发展计划(973计划)(G19990650)

关键词：近中性pH值 , 管线钢 , 应力腐蚀开裂

STRESS CORROSION CRACKING OF PIPELINE STEEL16Mn IN SOLUTIONS WITH NEAR NEUTRAL pH VALUES

用电化学极化测试技术、慢应变速率拉伸试验研究了管道钢(16Mn钢)在近中性pH值溶液中的应力腐蚀行为，并探讨了外加电位、CO2、温度等因素的影响.结果表明，应力腐蚀开裂为氢脆型应力腐蚀开裂；随着阴极电位的增加SCC敏感性增大，溶液中加入CO2后对应力腐蚀有着明显的促进作用.

The stress corrosion cracking (SCC) behavior of pipeline steel(16Mn) in different solutions with near neutral pH values was studied with slow strain rate testing and electrochemical polarization technique. The effect of applied potential, CO2 content and temperature on SCC behavior were investigated. The results showed that the crack development was mainly controlled by hydrogen - embrittlment stress corrosion cracking. Susceptibility to SCC increased as the cathodic potential increased. The addition of CO2 to the solution also increased veidentlv the SCC.

参考文献

[1]	Zheg W, Rvie R W, MacLead F A. Corrosion, 95,187:2
[2]	Vollman K W. Coté Verhaaf A, IIIing R. National Energy Board, Canada, 1996, 11:9
[3]	于树清.管道科技与信息，1977，1：5
[4]	Parkins P N, Blanchard Jv W K, Delanty B S. Corrosion, 1994,5:397
[5]	Parkins R N. Corrosion Science, 1980,20:151
[6]	卜文平，王俊，王乃和.油气储运，1994，4：32
[7]	王强.地下金属管道的腐蚀与阴极保护.西宁：西宁:青海人民出版社，1984.10，44

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