摘要
采用化学浸泡腐蚀实验并结合表面观察方法研究了在含有饱和O2的乙二醇盐溶液中Cl-浓度、除氧剂浓度对2205双相不锈钢点蚀行为的影响。实验结果表明:2205双相不锈钢的最大点蚀深度和平均失重随着乙二醇水溶液中Cl-浓度的增大而增大。当乙二醇水溶液温度为90℃、Cl-浓度为48 276 mg/L时,试样表面出现严重的点蚀,最大点蚀深度可达到0.305 mm。无水含盐乙二醇中Na Cl浓度越高,2205双相不锈钢试样的最大点蚀深度和平均失重越高。
Integrated some tests of chemical immersion corrosion with a method of surface observation, we studied the effects of Cl and deoxidant concentration on the pitting behavior of 2205 duplex stainless steel in O2-saturated ethylene glycol saline solution.Results show that the maximum pitting depth and average weight loss of the steel may increase with the Cl concentration. When the solution temperature and Cl concentration reach 90℃ and 48276mg/L, serious pitting appears at the sample surface with the maximum pitting depth of 0.305 mm. Furthermore, the higher the Na Cl concentration is, the larger the maximum pitting depth and average weight loss of the 2205 samples are.
出处
《天然气技术与经济》
2016年第5期50-53,83,共4页
Natural Gas Technology and Economy
关键词
2205双相不锈钢
乙二醇
氯离子
点蚀
点蚀深度
2205 duplex stainless steel
ethylene glycol
chloride ion
pitting
pitting depth
