H2S环境中液化石油气球罐用16MnR钢的腐蚀特性
Corrosion Properties of 16MnR Steel Used to Fabricate LPG Spherical Tanks in H2S-Containing Environment
摘 要
利用动电位极化和电化学阻抗谱技术, 研究了液化石油气球罐用16MnR钢在含H2S溶液中的腐蚀特性。结果表明: 溶液中H2S含量和pH值对16MnR钢的腐蚀具有较大影响, 腐蚀速率随H2S含量的增加和pH值的降低而不断加快,在pH值较低的溶液中, 随浸泡时间的延长, 容抗弧半径不断减小, 钢一直处于溶解状态; 随pH值升高, 容抗弧半径随浸泡时间的延长而不断增大; 随温度升高,腐蚀速率加快,钢表面所形成的硫化物膜与基体的附着性较差, 不能有效阻止钢遭受进一步的腐蚀。
交流阻抗
16MnR钢
H2S
硫化物膜
potentiodynamic polarization
EIS
16MnR steel
H2S
sulfide film
Abstract
The corrosion properties of 16MnR steel used to fabricate LPG spherical tanks in H2S-containing solution were investigated by potentiodynamic polarization measurement and electrochemical impedance spectroscopy (EIS). The results show that H2S content and pH value considerably influenced the corrosion of the 16MnR steel, and its corrosion rate increased with increasing the H2S content and decreasing the pH value. In solution with lower pH value, the capacitive loop radius decreased with the prolongation of immersion time and the steel was in the process of dissolving state. With the increase of pH value and the prolongation of immersion time, the capacitive loop radius increased. With the increase of temperature, the corrosion rate increased. The adherence of the sulfide film to the steel was poor, and thus the steel could not effectively be protected from further corrosion.
中图分类号 TG146.1
所属栏目
基金项目 江苏省教育厅自然科学基金资助项目(08KJB430007);南京工业大学学科基金资助项目
收稿日期 2010/7/29
修改稿日期 2011/6/17
网络出版日期
作者单位点击查看
备注唐建群(1973-),女,四川叙永人,副研究员,博士。
引用该论文: TANG Jian-qun,GONG Jian-ming,JIANG Yong,GENG Lu-yang. Corrosion Properties of 16MnR Steel Used to Fabricate LPG Spherical Tanks in H2S-Containing Environment[J]. Materials for mechancial engineering, 2011, 35(9): 52～57
唐建群,巩建鸣,姜勇,耿鲁阳. H2S环境中液化石油气球罐用16MnR钢的腐蚀特性[J]. 机械工程材料, 2011, 35(9): 52～57
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参考文献
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【3】孙宇鹏.球罐应力腐蚀开裂分析及防止对策[J].科学咨询导报,2007(26):109-109.
【4】郑结根.液化石油气(LPG)球罐的湿硫化氢腐蚀与防护[J].石油化工设备技术,2005,26(6):56-59.
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【6】练学余,田庆存.湿硫化氢环境下的球罐腐蚀状况分析[J].石油化工设备技术,2002,23(3):48-52.
【7】赵正宏,杨克详,王庆余,等.液化石油气球罐内壁鼓泡分析及防止措施[J].压力容器,2001,18(5):64-66.
【8】林树森,李光亚.400 m3液化石油气球罐失效分析[J].压力容器,1997,14(3):234-236.
【9】CHENG X L, MA H Y, ZHANG J P, et al.Corrosion of iron in acid solution with hydrogen sulfide[J]. Corrosion,1998,54(5):396-376.
【10】GB/T 11060.1-1998天然气中硫化氢含量的测定——碘量法[S].
【11】SHOESMITH D W, TAYLOR P, BAILEY M G, et al. The formation of ferrous monosulfide polymorphs during the corrosion of iron by aqueous hydrogen sulfide at 21 ℃[J]. J Electrochem Soc,1980,127(5):1007-1015.
【12】杨怀玉, 陈家坚, 曹楚南, 等.H2S水溶液中的腐蚀与缓蚀作用机理研究,I.酸性H2S溶液中碳钢的腐蚀行为及硫化物膜的生长[J].中国腐蚀与防护学报,2000,20(1):1-7.
【13】HUANG H H, TSAI W T, LEE J T.Electrochemical beha-vior of the simulated heat-affected zone of A516 carbon steel in H2S solution[J]. Electrochim Acta,1996,41:1191-1199.
【14】VELOZ M A, GONZLEZ I. Electrochemical study of carbon steel corrosion in buffered acetic acid solution with chlorides and H2S[J]. Electrochim Acta,2002,48:135-144.
【15】PUMPHREY P H. Effect of sulphide inclusions on hydrogen diffusion in steels[J]. Metal Sci,1982,16(1):41-47.
【16】VENKATASUBRAMANIAN T V, BAKER T J. Role of elongated MnS inclusions in hydrogen embrittlement of high-strength steel[J]. Metal Sci,1982,116(12):543-554.
【17】林胜德.液化石油气球罐失效原因分析[J].石油化工设备技术,2000,21(5):35-40.
【18】乔亮.球罐氢鼓泡形成原因及防护措施[J].石油化工腐蚀与防护,2006,23(2):51-53.
【19】萨阿基杨,叶弗烈莫夫.油气田设备防腐蚀[M].周慧麟,译.北京:石油工业出版社,1988.
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