利用自制高温高压釜模拟了油井筒中 H2 S/CO2环境,在温度30~150℃、H2 S/CO2气相和模拟地层水液相中对T95油管钢进行了腐蚀试验,研究了温度对该钢腐蚀速率的影响,并分析了腐蚀产物的形貌和物相组成.结果表明：当温度为30~120℃时,T95钢在气相和液相中的腐蚀速率均随温度的升高先增后降,且均在90℃时达到峰值,分别为0．882,1．096 mm?a－1,当温度高于120℃时,液相中的腐蚀速率缓慢增大而气相中的缓慢减小；随着温度的升高,气相中的腐蚀产物逐渐由片状变成块状并堆积在一起,液相中的则由絮状沉积变成团簇状堆积；腐蚀产物由铁、硫、氧等元素组成,腐蚀速率与腐蚀产物膜中硫含量成反比、与氧含量成正比,硫铁化合物对腐蚀起到了阻碍作用.
The H2 S/CO2 environment in the oil shaft was simulated by the home-made high temperature autoclave and the corrosion tests in gas phase of H2 S/CO2 and liquid phase of simulated formation water at temperatures of 30-150 ℃ were conducted on the T95 oil tube steel.The effects of the temperature on the steel corrosion rate were studied and the morphology and composition of corrosion products were analyzed.The results show that at the temperatures of 30-120 ℃,the corrosion rate of T95 steel in gas phase and liquid phase both first increased then decreased with the increase of temperature and reached the peak values at 90 ℃ of 0.882,1.096 mm?a-1 respectively.The corrosion rate increased in the liquid phase slowly while decreased in the gas phase at above 120 ℃.With the temperature increase,the corrosion product in the gas phase changed from flake shape to lump shape and accumulated,while in liquid phase from flocculent deposit to agglomerated accumulation.The corrosion product was composed of Fe,S,O,etc.The corrosion rate was proportional to S content and inversely proportional to O content in the corrosion product films and the iron-sulfur compounds played a corrosion inhibitation role.
参考文献
| [1] | 周永璋;曾建民;张坚.油井采出液成分与温度对Q235钢腐蚀行为的影响[J].机械工程材料,2008(12):25-28. |
| [2] | 朱世东;李金灵;杨志刚;张世君;李辉;王珂;马海霞.温度对J55油管CO2腐蚀行为的影响[J].机械工程材料,2014(8):6-10. |
| [3] | 张雷;丁睿明;杨建炜;路民旭.高含H2S/CO2介质中X60钢腐蚀产物膜分析[J].北京科技大学学报,2009(5):563-567. |
| [4] | 张清;李全安;文九巴;白真权.温度对油管钢CO2/H2S腐蚀速率的影响[J].材料保护,2004(4):38-39. |
| [5] | 姜放;戴海黔;曹小燕;黄红兵.油套管在CO2和H2S共存时的腐蚀机理研究[J].石油与天然气化工,2005(3):213-215. |
| [6] | 林学强;李效波;张海龙;张晶;董帅;柳伟;吴飞;路民旭.温度对N80钢在CO2/O2共存环境中腐蚀行为的影响[J].腐蚀与防护,2014(1):56-59. |
| [7] | 万里平;孟英峰;李皋;舒小波;魏纳;周华.H2S/CO2共存聚合物钻井液中腐蚀产物膜分析[J].应用基础与工程科学学报,2012(5):863-873. |
| [8] | 刘伟;蒲晓林;白小东;赵昊炜.油田硫化氢腐蚀机理及防护的研究现状及进展[J].石油钻探技术,2008(1):83-86. |
| [9] | 朱世东;刘会;白真权;尹成先;林冠发.CO2腐蚀机理及其预测防护[J].热处理技术与装备,2008(6):37-41. |
| [10] | 陈兴伟;吴建华;王佳;王春丽.电偶腐蚀影响因素研究进展[J].腐蚀科学与防护技术,2010(4):363-366. |
| [11] | 王斌;周小虎;李春福;李福德;钟水清.钻井完井高温高压H2S/CO2共存条件下套管、油管腐蚀研究[J].天然气工业,2007(2):67-69. |
| [12] | 植田昌克.合金元素和显微结构对CO2/H2S环境中腐蚀产物稳定性的影响[J].石油与天然气化工,2005(01):43-52. |
| [13] | 白真权;李鹤林;刘道新;王献昉.模拟油田H2S/CO2环境中N80钢的腐蚀及影响因素研究[J].材料保护,2003(4):32-34. |
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