目的 为了提高钢铁表面氧化锆转化膜的耐蚀性。方法 以Q235钢片为研究对象，在基础成膜液中分别添加不同质量浓度的三乙醇胺及三乙醇胺与尿素复配物，制备氧化锆转化膜。通过Tafel极化曲线和交流阻抗探讨氧化锆转化膜在5%NaCl腐蚀液中的电化学行为，利用扫描电镜观察氧化锆转化膜的表面形貌，在氧化锆转化膜上涂不同底漆，采用划圈法测试漆膜的附着力。结果 在氧化锆基础成膜液中添加100 mg/L三乙醇胺所制得的氧化锆转化膜在5%NaCl腐蚀液中的自腐蚀电流密度为1.66×10?5 A/dm2，钝化区域最宽，阻抗最大，耐蚀性最好。用尿素代替50%三乙醇胺，其所制得的氧化锆转化膜在5%NaCl腐蚀液中的自腐蚀电位和自腐蚀电流密度变化不大，钝化区域略有加宽，但阻抗弧明显加大。在氧化锆基础成膜液中添加三乙醇胺及三乙醇胺与尿素复配物制得的氧化锆转化膜，分别经过2%硅醇封闭液和5%硅烷封闭液封闭处理后，与低表面处理环氧底漆和改性环氧底漆漆膜附着力为1级。结论 在基础成膜液中添加三乙醇胺和三乙醇胺与尿素复配物后可提高Q235钢耐蚀性，氧化锆转化膜分别经过2%硅醇封闭液和5%硅烷封闭液封闭处理后，均与低表面处理环氧底漆和改性环氧底漆保持良好的附着力。

The work aims to improve corrosion resistance of zirconia conversion film on steel.With Q235 steel sheets were studied as objects of study,a zirconia conversion film was preparedon the steel surface by adding containing different concentrations of triethanolamine or composite of triethanolamine/carbamide to the zirconium solution. Electrochemical behavior of the zirconia conversion film in 5% NaCl corrosive liquidwas discussed with polarization curves and electrochemical impedance spectroscopy. Morphology of the zirconia conversion film was observed with SEM. After coating the films with different primers, properties of zirconia conversion film was assessed by performing adhesion test by scratch. Forthe zirconia conversion film prepared by adding 100mg/L triethanolamine to zirconia basic film-forming liquid in 5% NaCl corrosive liquid, the self-corrosion current was 1.66×10?5 A/dm2, passivation areawaswidest, impedance was the highest and corrosion resistance was the best. However, for the zirconia conversion film made from carbamide instead of 50%triethanolaminein 5% NaCl corrosive liquid, the self-corrosion potential and current changed slightly, the passivation area was wider while impedance arc increased obviously. For the zirconia conversion filmprepared by adding triethanolamine and composite of triethanolamine/carbamide in zirconia basic film-forming liquid treated with 2% silanol confining liquidand 5% silane confining liquid, the adhesion to low-treated surfaceepoxy primer and modified epoxy primer coating was grade 1. The corrosion resistance of Q235 steel can be enhanced by adding triethanolamine or composite of triethanolamine/carbamide to the zirconium solution. After being treatedwith 2% silanol confining liquid and 5% silaneconfining liquid, respectively,the zirconia conversion film keeps good adhesion to low pretreated surface epoxy primer andmodified epoxy primer.