利用极化曲线、电化学阻抗谱(EIS)研究了三聚磷酸钠和苯乙烯膦酸钠及其复合后对Q235碳钢在3％ NaCl溶液中的缓蚀性能.结果表明:苯乙烯膦酸钠为混合型缓蚀剂,对钢的阴、阳极腐蚀反应都有明显的抑制;磷酸盐复合盐对Q235碳钢有更好的缓蚀作用;2种磷酸盐在碳钢表面存在竞争性吸附,导致较小的协同效应,不利于保护膜的生成;两者浓度均为8 mmol/L时,缓蚀效率最大,可达82％.
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