针对兰州石化某常减压装置换热器管束( 主要材质为 10^#碳钢) 在使用过程中发生腐蚀的问题,通过浸泡试验和电化学测试,研究了壳程介质中的 Cl^-浓度对 10^#碳钢在含盐污水中腐蚀行为的影响。 结果表明:弱碱性溶液中的 OH^-与 Cl^-竞争吸附,使得 Cl^-浓度的变化对碳钢的腐蚀速率基本没有影响,其腐蚀速率在 0 . 145~ 0 . 185 mm / a 之间。

Based on the corrosion problem of refinery heat exchanger tubes (10^#carbon steel) in the course of using, the corrosion behaviors of 10^#carbon steel in saline wastewater with different Cl^-concentration were investigated by means of immersion test and electrochemical methods, respectively. The experiments results indicated that the competitive adsorption of OH^-and Cl^-in the weak basic solution made the corrosion rates of 10^#steel had little change in different Cl^- concentration corrosion medium. The range of corrosion rate was between 0 . 145 ~ 0 . 185 mm / a.