通过实验室和现场条件下的埋片实验,并结合微观形貌分析和电化学极化技术,研究了X70钢在库尔勒土壤环境中的腐蚀行为.研究表明,X70钢在库尔勒土壤环境中能够生成较稳定的腐蚀产物膜,其局部腐蚀区域(新鲜金属表面)的腐蚀电流密度大大高于非局部腐蚀区的,表明X70钢在库尔勒土壤环境中容易发生局部腐蚀.这些局部腐蚀的特点是宏观上为不均匀腐蚀或大的点蚀,微观上发生明显的晶界腐蚀.
Corrosion characteristic of X70 pipeline steel In a high saliferous and alkaline soil environment,named Ku'erle soil,was investigated by burying tests both in lab and nature field,micro-morphology analyses and electrochemical polarization technique.The X70 pipeline steel would form a protective corrosion product film,leading to a relative low dissolution current,however,the anodic current in local corrosion area,or in fresh surface without film covering,is much more intensive than the usual metal surface covered with productive film,indicating that X70 pipeline steel is susceptible to local corrosion.The characteristic of these localizing corrosion is non-uniform corrosion and visible corrosion pits observed in a magnifying scale,and in a mode of intergranular corrosion under micro scale observation.
参考文献
| [1] | 路民旭,白真权,赵新伟,赵国仙,罗金恒,陈长风.油气采集储运中的腐蚀现状及典型案例[J].腐蚀与防护,2002(03):105-113. |
| [2] | 郭淑娟,陈保东,王占黎,王昆,张文鹏.埋地输油管道腐蚀缺陷分析及修复工艺[J].管道技术与设备,2007(02):41-43. |
| [3] | D. -T. Chin;G. M. Sabde .Current distribution and electrochemical environment in a cathodically protected crevice[J].Corrosion: The Journal of Science and Engineering,1999(3):229-237. |
| [4] | L. J. Qiao;J. L. Luo;X. Mao .Hydrogen evolution and enrichment around stress corrosion crack tips of pipeline steels in dilute bicarbonate solution[J].Corrosion: The Journal of Science and Engineering,1998(2):115-120. |
| [5] | B. Gu;J. Luo;X. Mao .Hydrogen-facilitated anodic dissolution-type stress corrosion cracking of pipeline steels in near-neutral pH solution[J].Corrosion: The Journal of Science and Engineering,1999(1):96-106. |
| [6] | 刘智勇,翟国丽,杜翠薇,李晓刚.X70钢在鹰潭酸性土壤中的应力腐蚀行为[J].四川大学学报（工程科学版）,2008(02):76-81. |
| [7] | 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(02):209-214. |
| [8] | 李明星,王荣,李鹏亮,路民旭.X70管线钢在模拟土壤介质中裂纹扩展量化模型[J].中国腐蚀与防护学报,2004(03):163-167. |
| [9] | 郭浩,李光福,蔡珣,周建江,黄春波,杨武.外加电位对X70管线钢在近中性pH溶液中的应力腐蚀破裂的影响[J].中国腐蚀与防护学报,2004(04):208-212. |
| [10] | 赵颖,王荣.X70管线钢电化学充氢后的力学行为研究[J].中国腐蚀与防护学报,2004(05):293-296. |
| [11] | 毛健鹏,唐聿明,左禹.X70钢在磷酸盐缓冲溶液中的孔蚀电化学行为研究[J].中国腐蚀与防护学报,2006(02):80-84. |
| [12] | 郭红,何晓英.X70钢在含H2S弱酸性溶液中的防腐研究[J].中国腐蚀与防护学报,2006(06):355-359. |
| [13] | 邓海英,何晓英,王红云,邓祖宇.X70钢在饱和CO2的HAc-NaAc溶液中的腐蚀行为[J].中国腐蚀与防护学报,2007(04):224-227. |
| [14] | 谢广宇,唐获,张雁,武会宾,黄国建.X70级管线钢硫化物应力腐蚀开裂行为研究[J].中国腐蚀与防护学报,2008(02):86-89. |
| [15] | 许淳淳,池琳,胡钢,黄杰,王紫色.HCO3-浓度对X70钢阳极反应过程的影响[J].中国腐蚀与防护学报,2005(01):20-24. |
| [16] | 张颖瑞,董超芳,李晓刚,芮晓龙,周和荣.电化学充氢条件下X70管线钢及其焊缝的氢致开裂行为[J].金属学报,2006(05):521-527. |
| [17] | 王荣.氢对X70管线钢预裂纹试样断裂性能的影响[J].中国腐蚀与防护学报,2008(02):81-85. |
| [18] | 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. |
| [19] | 杜翠薇,李晓刚,武俊伟,宋义全,徐璟.三种土壤对X70钢腐蚀行为的比较[J].北京科技大学学报,2004(05):529-532. |
| [20] | 武俊伟,李晓刚,杜翠薇,汪崧,宋义全.X70钢在库尔勒土壤中短期腐蚀行为研究[J].中国腐蚀与防护学报,2005(01):15-19. |
| [21] | 武俊伟,李晓刚,杜翠薇,汪崧,宋义全.X70钢在库尔勒土壤中短期腐蚀行为研究[J].中国腐蚀与防护学报,2005(01):15-19. |
| [22] | 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. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%