金属学报  2008, Vol. 44 Issue (2): 209-214

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X70钢在酸性土壤模拟溶液中的应力腐蚀行为

刘智勇 翟国丽 杜翠薇 李晓刚

(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)

SCC OF X70 PIPELINE STEEL IN SIMULATED ACID SOIL ENVIRONMENT

LIU Zhi-yong;Xiaogang LI

北京科技大学腐蚀与防护中心

刘智勇; 翟国丽; 杜翠薇; 李晓刚 . X70钢在酸性土壤模拟溶液中的应力腐蚀行为[J]. 金属学报, 2008, 44(2): 209-214 .
, , , . SCC OF X70 PIPELINE STEEL IN SIMULATED ACID SOIL ENVIRONMENT[J]. Acta Metall Sin, 2008, 44(2): 209-214 .

摘要 参考文献 相关文章 Metrics 全文: PDF(655 KB)   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）、动电位极化方法以及扫描电镜（SEM）研究X70钢在鹰潭土壤模拟溶液中的应力腐蚀行为。结果表明：X70钢在我国酸性土壤模拟溶液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，完全受阳极过程控制时X70钢的SCC敏感性较低，但会发生点蚀和严重的均匀腐蚀；受混合电极过程控制和全受阴极过程控制时均能发生SCC；受混合电极过程控制时，X70钢的SCC二次裂纹与点蚀伴生，裂纹形核密度大；而完全受阴极过程控制时，SCC裂纹独立发生，裂纹形核密度底；混合电极过程控制时比完全阴极电极过程控制下更容易发生SCC裂纹。 关键词 ： X70钢,  SCC,  鹰潭,  酸性土壤     Abstract：In order to study the SCC susceptibility of X70 pipeline steel in solutions which simulated the acid soil environment of Yingtan, China, slow strain rate testing (SSRT), microstructural observation of fracture areas by SEM and potentiodynamic polarization curves were used here. SCC did occur in the as-received material, with a transgranular cracking mode charged with different cathodic potential.The applied cathodic polarization potential played a important role in facilitating the occurrence of SCC.X70 pipeline steel was little sensitive to SCC in a athodic potential condition, but tended to be attacked by pits and uniform corrosion. However, as the applied cathodic potential droped, a combined electrochemical reaction of athode and cathode controlled the SCC behaviour of X70 steel, and as the applied cathodic potential droped further, cathodic reaction controlled SCC origination of X70 only. At the combined electrochemical condition, cracks occurred with pits together, which were more crowded than those at single cathodic condition at which cracks originated by themselves. Key words： X70 pipeline steel    SCC    Yingtan    acid soil environment 收稿日期: 2007-06-14      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 刘智勇 翟国丽 杜翠薇 李晓刚 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2008/V44/I2/209 [1]Yang W.Corros Prot,2003;24:461 (杨武．腐蚀与防护，2003；24：461) [2]Fang B Y,Wang J Q.Acta Metall Sin,2001;37:454 (方丙炎，王俭秋，金属学报，2001；37：454) [3]Jack T R,Erno B,Krist K.Corrosion,2000;362:10 [4]Huang C B,Li G F,Yang W.Corros Prot,2005;26:1 (黄春波，李光福，杨武．腐蚀与防护，2005；26：1) [5]Manfredi C,Otegui J L.Eng Failure Anal,2002;9:495 [6]Xu C C,Chi L,Hu G,Huang J,Wang Z S.J Chin Soc Corros Prot,2005;25:20 (许淳淳，池琳，胡钢，黄杰，王紫色．中国腐蚀与防护学报，2005；25：20) [7]Chin D T,Sabde G M.Corrosion,1999;55:229 [8]Qiao L J,Luo J L,Mao X.Corrosion,1998;54:115 [9]Parkins R N,Blanchard Jr W K,Delanty B S.Corrosion, 1994;50:394 [10]Van Boven G,Chen W,Rogge R.Acta Mater,2007;55: 29 [11]Li X G,Du C W,Liu Z Y.Corrosion Behavior and Ex- premential Study of X70.Beijing:Science Press,2006: 13 (李晓刚，杜翠薇，刘智勇．X70钢的腐蚀行为与实验研究．北京：科学出版社，2006：13) [12]Parkins R N.Corros Sci,1980;20:147 [13]Nesic S,Postlethwaite J,Olsen S.Corrosion,1996;52: 280 [14]Gu B,Luo J,Mao X.Corrosion,1999;55:96 [1] 张慧, 杜艳霞, 李伟, 路民旭. 不同环境介质中X70钢的交流腐蚀行为及腐蚀产物膜层分析[J]. 金属学报, 2017, 53(8): 975-982. [2] 闫茂成,杨霜,许进,孙成,吴堂清,于长坤,柯伟. 酸性土壤中破损防腐层下X80管线钢的应力腐蚀行为*[J]. 金属学报, 2016, 52(9): 1133-1141. [3] 康举,李吉超,冯志操,邹贵生,王国庆,吴爱萍. 2219-T8铝合金搅拌摩擦焊接头力学和应力腐蚀性能薄弱区研究*[J]. 金属学报, 2016, 52(1): 60-70. [4] 闫茂成, 王俭秋, 韩恩厚, 孙成, 柯伟. 埋地管线阴极保护屏蔽剥离涂层下薄液腐蚀环境特征及演化[J]. 金属学报, 2014, 50(9): 1137-1145. [5] 杨燕，李自力，文闯. 交流电对X70钢表面形态及电化学行为的影响[J]. 金属学报, 2013, 49(1): 43-50. [6] 刘智勇 王长朋 杜翠薇 李晓刚. 外加电位对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响[J]. 金属学报, 2011, 47(11): 1434-1439. Viewed Full text Abstract Cited   Shared      Discussed