利用动电位扫描技术和慢应变速率拉伸试验(SSRT)以及扫描电子显微镜(SEM)研究了库尔勒土壤模拟溶液中不同外加阴极电位下X80管线钢焊接接头的应力腐蚀开裂(SCC)行为.结果表明:阴极电位对X80钢焊接接头处的SCC敏感性影响较为明显.拉伸试样全部断裂在焊缝或热影响区.在Eco.下,金属表面裂纹萌生于点蚀坑,试样开裂为阳极溶解机制.当外加电位为-800 mV至-900 mV时,金属处于阴极保护电位区,此时金属的SCC敏感性较低,其开裂机制为阳极溶解和氢致开裂混合机制.当外加电位小于等于-950 mV时,外加电位越低,材料的SCC敏感性越大,此时金属SCC行为表现为氢脆机制.
参考文献
| [1] | 曹楚南.中国材料的自然环境腐蚀[M].北京:化学工业出版社,2004:286-290. |
| [2] | 李云涛,杜则裕,陶勇寅,李建军.Effect of Mn and MnS on corrosion properties of domestic pipeline steels and welds[J].中国焊接,2004(02):123-127. |
| [3] | Lin Jiangbo,Song Yonglun,Ran Guowei,Zhang Wanchun,Luo Chuanguang.An investigation on the performance of stress corrosion cracking in aluminum-copper alloy welded joint[J].中国焊接,2011(02):67-72. |
| [4] | 孙齐磊,曹备,吴荫顺.X70钢焊接接头在近中性溶液中应力腐蚀行为研究[J].材料热处理学报,2008(06):125-129. |
| [5] | 方丙炎,王俭秋,朱自勇,韩恩厚,柯伟.埋地管道在近中性pH和高pH环境中的应力腐蚀开裂[J].金属学报,2001(05):453-458. |
| [6] | 王炳英,霍立兴,王东坡,邓彩艳.X80管线钢在近中性pH溶液中的应力腐蚀开裂[J].天津大学学报,2007(06):757-760. |
| [7] | Niu L;Cheng YF .Corrosion behavior of X-70 pipe steel in near-neutral pH solution[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2007(21):8626-8631. |
| [8] | CHENG Y F .Fundaments of hydrogen evolution reaction and its implications on near-neutral pH stress corrosion cracking of pipelines[J].Electrochim,Acta,2007,52(7):2661-2665. |
| [9] | B. Fang;E.-H. Han;J. Wang .Mechanical and Environmental Influences on Stress Corrosion Cracking of an X-70 Pipeline Steel in Dilute Near-Neutral pH Solutions[J].Corrosion: The Journal of Science and Engineering,2007(5):419-432. |
| [10] | Bulger J T;LU B T;LUO J L .Microstructural effect on near-neutral pH stress corrosion cracking resistance of pipeline steels[J].Journal of Materials Science,2006,41(15):5001-5004. |
| [11] | 张亮,李晓刚,杜翠薇,梁平,刘志勇.X70管线钢在库尔勒土壤环境中应力腐蚀研究[J].材料热处理学报,2008(03):49-52. |
| [12] | 杜翠薇,刘智勇,梁平,贾改风,李晓刚.不同组织X70钢在库尔勒含饱和水土壤中的短期腐蚀行为[J].金属热处理,2008(06):80-84. |
| [13] | 张亮,李晓刚,杜翠薇,梁平.X70管线钢在库尔勒土壤模拟溶解氧液中的腐蚀行为[J].金属热处理,2007(12):93-95. |
| [14] | 孔德军,吴永忠,龙丹.X70管线钢焊接接头慢拉伸应力腐蚀行为[J].材料热处理学报,2011(09):101-105. |
| [15] | Ping Liang,Cui-wei Du,Xiao-gang Li,Xu Chen,Zhang liang.Effect of hydrogen on the stress corrosion cracking behavior of X80 pipeline steel in Ku'erle soil simulated solution[J].矿物冶金与材料学报,2009(04):407-413. |
| [16] | Zhiyong Liu,Guoli Zhai,Xiaogang Li,Cuiwei Du.Effect of deteriorated microstructures on stress corrosion cracking of X70 pipeline steel in acidic soil environment[J].北京科技大学学报（英文版）,2008(06):707-713. |
| [17] | 陈旭,吴明,何川,肖军.外加电位对X80钢及其焊缝在库尔勒土壤模拟溶液中SCC行为的影响[J].金属学报,2010(08):951-958. |
| [18] | Parkins R N .Predictive approaches to stress corrosion cracking failure[J].Corrosion Science,1980,20(2):147-151. |
| [19] | Y. M. Zeng;J. L. Luo;P.R. Norton .Initiation and propagation of pitting and crevice corrosion of hydrogen-containing passive films on X70 micro-alloyed steel[J].Electrochimica Acta,2004(5):703-714. |
| [20] | Zucchi F;Grassi V;Monticelli C et al.Hydrogen embrittlement of duplex stainless steel under cathodic protection in artificial seawater in the presence of sulphide ions[J].Corrosion Science,2006,48(2):522-530. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%