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应用失重法、动电位扫描和EIS等方法, 研究了A3 碳钢在三元复合驱油剂主要成分水解聚丙烯酰胺(HPAM) 和石油磺酸盐(PS) 水溶液中的腐蚀形态.结果表明, HPAM 对A3钢具有缓蚀作用, 浓度增加, 缓蚀率上升;PS对A3 钢也有缓蚀作用, 但浓度过高时因形成胶束而从碳钢表面脱附, 使缓蚀率下降“,”The corrosion performance of mild steel A3 in oilfield refilling water containing oil flooding reagent such as polymer HPAM and petroleum sulfonate (PS) has been investigated by immersion weight loss, potentiodynamic polarization and EIS. It was found that mild steel was under active dissolution in both HPAM and PS solutions. Inhibition efficiency of HPAM increased with the increase in its concentration. EIS presented a single capacitive loop, showing the characteristics of HPAM absorption. However, EIS in PS solution indicated two capacitive loops with lower dispersion coefficient. Moreover, when the PS concentration exceeded 0.06% (w/w), beyond its CMC (critical micelle concentration) in aqueous solution, its inhibition efficiency decreased due to the desorption of PS from steel surface.