高温高压条件下13Cr钢的乙酸腐蚀
Acetic Acid Corrosion of 13Cr Steel under High Temperature and High Pressure Conditions
摘 要
研究了13Cr钢在高温高压环境中的乙酸腐蚀行为。13Cr钢腐蚀速率随乙酸浓度增加而增大。不含乙酸时, 基体铬发生溶解并在表面形成Cr(OH)3钝化膜, 溶液中侵蚀性离子(Cl-)的存在是发生点蚀的重要原因。加入乙酸后, 乙酸电离H+使得溶液酸性增强, 钝化膜稳定性降低。H+和Cl-更容易通过钝化膜与基体接触, 促进局部酸性增强以及侵蚀性离子浓度增加, 加快点蚀的发生和发展过程。随着乙酸浓度增加, 酸性增强越明显, 对点蚀的促进作用越强, 腐蚀速率增加。
乙酸
腐蚀
高温
高压
13Cr steel
acetic acid
corrosion
high temperature
high pressure
Abstract
The corrosion behavior of 13Cr steel in solution containing acetic acid under high temperature and high pressure conditions was investigated. The corrosion rate of 13Cr increased with the increase of acetic acid concentration. When there was no acetic acid in the solution, the passive film of Cr(OH)3 formed on the surface. Pitting happened because of the existence of chloride ions. When acetic acid was added, the acidity of solution was enhanced. And the stability of the film decreased. Hydrogen ions and chloride ions could pass through the film easily. The local acidity and the concentration of chloride ions increased. Then the process of pitting was accelerated. With the increase of the concentration of acetic acid, the solution became more and more acidic. Then the pitting was promoted obviously. And the corrosion rate increased.
中图分类号 TG172.8 DOI 10.11973/fsyfh-201508009
所属栏目 试验研究
基金项目 长庆油田油气当量上产5 000万吨关键技术课题六(2011E-1306)
收稿日期 2015/3/2
修改稿日期
网络出版日期
作者单位点击查看
备注朱方辉(1982-),工程师,硕士,从事油气田腐蚀防护及材料加工方面工作,
引用该论文: ZHU Fang-hui,LUO Ze-song,LI Xiao-feng,LIU Wei,YANG Bin. Acetic Acid Corrosion of 13Cr Steel under High Temperature and High Pressure Conditions[J]. Corrosion & Protection, 2015, 36(8): 735
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参考文献
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【2】PLETCHER D,SIDORIN D,HEDGES B. Acetate-enhanced corrosion of carbon steel-further factors in oilfield environments[J]. Corrosion,2007,63(3): 285-294.
【3】程学群,李晓刚. 不锈钢和镍合金在高温高压醋酸溶液中的腐蚀行为[J]. 中国腐蚀与防护学报,2006,26(2): 70-74.
【4】GEORGE K,NESIC S,WAARD C D. Electrochemical investigation and moldeling of carbon dioxide corrosion of carbon steel in the presence of acetic acid[C]//Corrosion 2004,Houston: [s.n.],2004: 04379.
【5】CROLET J L,THEVENOT N,DUGSTAD A. Role of free acetic acid on the CO2 corrosion of steel[C]//Corrosion 1999,Houston: [s.n.],1999: 99024.
【6】李琼玮, 张建勋, 刘故箐. 油田的有机酸-CO2环境中碳钢腐蚀研究的进展[J]. 腐蚀科学与防护技术,2013, 25(2): 165-168.
【7】朱婧, 丁毅, 朱丹, 等. 温度对钛在甲酸溶液中电化学腐蚀行为的影响[J]. 材料热处理技术,2011, 40(20): 135-136.
【8】叶超, 杜楠, 赵晴, 等. 不锈钢点蚀行为及研究方法的进展[J]. 腐蚀与防护,2014, 35(3): 271-276.
【9】张金钟, 谢俊峰, 宋文文, 等. Cl-浓度对316L不锈钢点蚀行为的影响[J]. 天然气与石油,2012, 30(1): 71-73.
【10】陈晓, 陈慎豪, 蔡生民. 酸性溶液中氯离子对铁的钝化膜的破坏[J]. 物理化学学报,1988, 4(4): 382-386.
【11】李党国, 冯耀荣, 白真权, 等. 温度、pH和氯离子对X80钢钝化膜内点缺陷扩散系数的影响[J]. 化学学报,2008, 66(10): 1151-1158.
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