采用动电位扫描技术和慢应变速率拉伸实验研究了X80钢及其焊缝在库尔勒土壤模拟溶液中的应力腐蚀行为,并利用扫描电镜观察了不同外加电位下的断口形貌.结果表明,X80管线钢及其焊缝在库尔勒土壤模拟溶液中的极化曲线具有典型的活性溶解特征.阳极极化及自腐蚀电位下,裂纹萌生于点蚀坑及夹杂物处,X80钢及其焊缝的开裂机制为阳极溶解;外加电位为-900 mV(vs SCE)时,母材处于阴极保护状态,应力腐蚀敏感性较低,而焊缝的应力腐蚀敏感性明显增加;当外加电位负移至-1200 mV(vs SCE),母材和焊缝均表现出较高的SCC敏感性,其开裂机制为氢和应力协同作用下的氢致开裂.相同电位下,焊缝的应力腐蚀敏感性高于母材,其断裂位置多在热影响区,这是由焊接过程中产生的冶金相变和残余应力造成的.
参考文献
| [1] | Li J,Elboujdaini M,Gao M,Revie R W.Mater Sci Eng,2008; A486:496 |
| [2] | Liu Z Y,Li X G,Zhang Y R,Du C W.Acta Metall Sin(Engl Lett),2009; 22:58 |
| [3] | Li M C,Cheng Y F.Electrochim Acta,2007; 52:8111 |
| [4] | Parkins R N,Belhimer E,Blanchard W K.Corrosion,1993; 49:951 |
| [5] | Fazzini P G,Otegui J L.Int J Pressure Vessels Piping,2007; 84:739 |
| [6] | Charles E A,Parkins R N.Corrosion,1995; 51:518 |
| [7] | Pikey A K,Lambert S B,Plumtree A.Corrosion,1995; 51:91 |
| [8] | Wang J Q,Atrens A,Cousens D R.J Mater Sci,1999; 34:1721 |
| [9] | Jack T R,Wilmott M J.Mater Perform,1995; 34:19 |
| [10] | Gonzalez-Rodriguez J G,Casales M,Salinas-Bravo V M,Albarran L J,Martinez L.Corrosion,2002; 58:584 |
| [11] | Harle B A,Beavers J A.Corrosion,1994; 49:861 |
| [12] | Gu B,Yu W Z,Luo J L,Mao X.Corrosion,1999; 55:312 |
| [13] | Liu Z Y,Li X G,Du C W,Cheng Y F.Corros Sci,2009; 51:2863 |
| [14] | Charles E A,Parkins R N.Corrosion,1995; 51:518 |
| [15] | Parkins R N,Blanchard W K,Delanty B S.Corrosion,1994; 50:394 |
| [16] | Cao C N.Corrosion of Metals in Nature Environment in China.Beijing:Chemical Industry Press,2004:286(曹楚南.中国材料的自然环境腐蚀.北京:化学工业出版社,2004:286) |
| [17] | Zhang G A,Cheng Y F.Corros Sci,2009; 51:1714 |
| [18] | Van-Boven G,Chen W,Rogge R.Acta Mater,2007; 55:29 |
| [19] | Chu R,Chen W,Wang S H,King F,Jakc T R,Fessler R R.Corrosion,2004; 60:275 |
| [20] | Davies D H,Burstein G T.Corrosion,1980; 36:416 |
| [21] | Li M C,Cheng Y F.Electrochim Acta,2008,53:2831 |
| [22] | Zhang T,Sun X L,Chen J S,Long J,Lin M.Pipeline Technique Equip,2004;(2):33(张涛,孙新岭,陈居术,龙军,林梅.管道技术与设备,2004;(2):33) |
| [23] | Zhang G A,Cheng Y F.Electrochim Acta,2009; 55:316 |
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%