The synergistic inhibition effect of N,N＇-diphenylthiourea (DPH-TU) and sodium dodecyl sulfonate (SDS) and related mechanism for Q235 steel in 5wt％ H2SO4solution were studied by Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The results showed that the corrosion inhibition effect of DPH-TU is promoted by the addition of SDS. The synergistic effect is most significant when the concentration ratio of DPH-TU to SDS is 1:1.%采用塔菲尔极化曲线和电化学阻抗谱(EIS)测量方法,研究了5%(质量分数)硫酸溶液中N,N'-二苯基硫脲(DPH-TU)和十二烷基磺酸钠(SDS)对Q235钢的协同缓蚀效应及其机理.实验表明,添加十二烷基磺酸钠时N,N'-二苯基硫脲的缓蚀效果有促进作用.当N,N'-二苯基硫脲和十二烷基磺酸钠的浓度比为1:1时,其协同缓蚀效应最为显著.
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