目的 探究Tween-80（失水山梨醇单油酸酯聚氧乙烯醚）和CTAB（十六烷基三甲基溴化铵）共同存在于盐酸溶液中时，两者对钢材的缓蚀协同作用。方法 采用失重法、极化曲线、阻抗谱、协同参数、SEM图和AFM图，对钢材腐蚀的电化学特征、Tween-80和CTAB的协同作用效果以及钢材腐蚀后的表面形貌进行探究。结果 在各反应温度下，当不同浓度Tween-80与2?10?5 mol/L CTAB共同作用于1 mol/L盐酸溶液中时，腐蚀电流密度显著减小，电荷转移电阻显著增大。复配缓蚀剂属于混合型缓蚀剂，能够同时抑制阴极和阳极反应，其缓蚀效率随反应温度升高而下降。当反应温度为30、40、50 ℃时，复配缓蚀剂分别在Tween-80浓度为5?10?6、2?10?5、2?10?5 mol/L的条件下达到最佳缓蚀效果，最佳缓蚀效率分别为97.05%、94.00%和93.96%。SEM图和AFM图显示，钢材在含复配缓蚀剂的盐酸溶液中反应12 h后，表面平坦，平均粗糙度很小。结论 Tween-80与CTAB以一定浓度共同存在于盐酸溶液中时，两者之间具有很好的协同作用。复配缓蚀剂能够显著提高缓蚀效率，有效地抑制钢材的腐蚀。

The work aims to study synergistic effect of Tween-80 and CTAB coexisting in HCl solution on corrosion inhibi-tion of steel. Electrochemical characteristics of steel corrosion, synergistic effect of Tween-80 and CTAB, and surface morphology of corroded steel were investigated by means of weight loss method, polarization curve, impedance spectroscopy, synergistic parameters, SEM and AFM images. At each reaction temperature, when different concentrations of Tween-80 and 2? 10?5 mol/L CTAB coexist in HCl solution, corrosion current density reduced significantly while charge transfer resistance increased significantly. The compounded inhibitor was a mixed-type inhibitor which could simultaneously inhibit anodic and cathodic reactions, and its inhibition efficiency decreased with the increase of temperature. At the reaction temperature of 30, 40 and 50 ℃, the optimum inhibition effect could be achieved if the concentration of Tween-80 was 5?10?6, 2?10?5 and 2?10?5 mol/L, respectively; and the optimum inhibition efficiency was 97.05%, 94.00% and 93.96%, respectively. SEM and AFM images showed that the steel surfaces was flat and intact, and average roughness was small after 12 hours of reaction in HCl solution containing compounded inhibitor. Tween-80 and CTAB have good synergistic effect when they coexist at a certain concentration in HCl solution. The compounded inhibitor can significantly improve inhibition efficiency and effectively inhibit corrosion of steel.