通过模拟普光气田元素硫沉积环境，应用腐蚀失重法探讨了油套管用P110钢在不同温度、不同酸性条件硫沉积环境中的腐蚀失重规律，并辅以扫描电镜、能谱等技术研究了腐蚀产物膜的形貌、成分及结构。结果表明：P110钢在元素硫沉积的各环境条件中腐蚀速率极高；同时，由于两相中P110钢的腐蚀机理存在差异，在相同温度、相同酸性条件中硫相的腐蚀速率高于液相；随着腐蚀溶液初始酸性的增强，H＋去极化作用增强，且内、外层腐蚀产物膜的硫含量均有所降低，对基体的保护性变差，腐蚀程度逐渐加重。
By simulating the environment of PUGUANG gas field and adjusting the temperature and acidity of the experimental system, corrosion rate of Pl10 steel was investigated using the weight loss method. Scanning electron microscope (SEM), energy disperse spectroscopy (EDS) were applied to characterize the microstructure and composition of the corrosion products. Results show that Pll0 steel exhibited very high corrosion rate of Pl10 steel in the environments with sulphur deposition. The corrosion rate in the sulfur phase is higher than that in the solution phase because of the difference in corrosion mechanisms. The corrosion rate can be accelerated as the increasing of the initial acidity of the solution, which causes the enhanced depolarization of H+ and the decreased content of sulfur in the inner and outer films, respectively.
参考文献
| [1] | 林海潮.特高含H2S气井开采过程中可能发生的相态变化及其影响[J].腐蚀科学与防护技术,1992(04):308. |
| [2] | 李瑛.元素硫对特高含H2S气井用油管钢的腐蚀[J].腐蚀科学与防护技术,1996(03):252. |
| [3] | 朱世东,白真权,林冠发,尹成先,刘会.高Cl-条件下H2S分压对P110钢腐蚀速率的影响[J].腐蚀与防护,2009(05):293-296. |
| [4] | 蔡晓文,戈磊,陈长风,于浩波.油套管用P110钢在元素硫环境中腐蚀规律的研究[J].中国腐蚀与防护学报,2010(02):161-165. |
| [5] | 邓洪达,李春福,罗平亚.含硫气田腐蚀研究现状[J].材料保护,2008(03):50-54. |
| [6] | 葛红花,周国定,解群.304、316L不锈钢耐氯离子和硫离子性能比较[J].华东电力,2005(09):13-15. |
| [7] | Russell H.Jones;D.R Baer;C F Windisch.Corrosion enhanced enrichment of sulfur and imp/i-cattons for alloy 22[A].USA:NACE,2006:06621-06638. |
| [8] | 葛红花,周国定,吴文权.硫离子对316L不锈钢耐蚀性的影响[J].华北电力技术,2003(08):46-49. |
| [9] | 吴杰;张学慧;苏发昌;顾琳 .膜电位的测量实验设计[J].物理实验,2003,18(05):11-12. |
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