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。
The corrosion properties of 16MnR steel used to fabricate LPG spherical tanks in H2S-containing solution were investigated by potentiodynamie polarization measurement and electrochemical impedance spectroscopy （EIS）. The results show that H2 S content and pH value considerably influenced the corrosion of the 16MnR steel, and its corrosion rate increased with increasing the H2 S 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.
参考文献
| [1] | 高向东,朱有志.加工高硫原油对储罐的影响[J].石油化工腐蚀与防护,2001(06):39-41. |
| [2] | 孙宇鹏.球罐应力腐蚀开裂分析及防止对策[J].科技创新导报,2007(26):109. |
| [3] | 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(06):56-59. |
| [4] | 唐建群,巩建鸣,张礼敬.16MnR钢液化石油气球罐失效分析[J].腐蚀科学与防护技术,2005(06):432-434. |
| [5] | 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(03):48-52. |
| [6] | 赵正宏,杨克祥,王庆余,王明玉,张军.液化石油气球罐内壁鼓泡分析及防治措施[J].压力容器,2001(05):64-66. |
| [7] | 林树森.400m3液化石油气球罐失效分析[J].压力容器,1997(03):54. |
| [8] | 杨怀玉,陈家坚,曹楚南,曹殿珍.H2S水溶液中的腐蚀与缓蚀作用机理的研究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(01):1-7. |
| [9] | 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(05):35-38,41. |
| [10] | 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(02):51-53. |
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