为开发新型缓蚀剂，拓展O，O’-二烃基二硫代磷酸盐的应用领域，合成了O，O’-二苯基二硫代磷酸-N，N-二乙铵（DEDBDP），采用失重试验和电化学方法研究了DEDBDP在HCl介质中对Q235钢的缓蚀性能，结果表明：DEDBDP是一种优良缓蚀剂，（25±1）℃，5％HCl溶液中，DEDBDP浓度为120mg／L时，缓蚀率达85．23％；DEDBDP属阳阴极混合型缓蚀剂，适用于低温、较高酸度环境，具有持久的缓蚀性能；DEDBDP在QZ35钢表面吸附符合Langmuir吸附等温式，为自发的物理和化学吸附。
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