摘要
利用失重实验在模拟腐蚀介质中研究了Q235碳钢、316L奥氏体不锈钢、2205双相不锈钢和Monel合金在常压装置油相中的腐蚀行为,利用SEM观察了不同类型金属的腐蚀微观形貌,得到了S^(2-)和HCl在油相中对金属腐蚀的影响情况。研究结果表明四种材料的腐蚀速率都随着HCl浓度增加而增加,而S^(2-)则可显著降低油相中可钝化金属的耐蚀性。四种材料中2205双相不锈钢在常压装置油相中的耐蚀性能最好。
Mass loss experiments have been used to studycorrosion behaviors of Q235 carbon steel,316 L austenitic stainless steel,2205 duplex stainless steel and Monel alloy in oil phasein atmospheric distillation unit of refinery.The micromorphology of corroded sample surfaces was characterized with SEM.The effects of S^2-and HCl addition on corrosion performance of four materials were investigated respectively.The results showed thatcorrosion rates of all materials increased with the increasing of HCl concentration.However,S^2-ions mainly reduced the stability of the passive film of passivated alloys.Among four metals concerned,2205 duplex stainless steel showed the best corrosion resistance in oil phase of atmospheric distillation unit.
出处
《全面腐蚀控制》
2017年第2期72-77,共6页
Total Corrosion Control
