采用析因分析试验及动电位极化曲线、电化学阻抗谱(EIS)等测试方法，研究了海水环境因素中的典型阴离子（Cl^-、 HCO₃^-、 SO₄^2-交互作用对5083铝合金耐蚀性的影响. 结果表明,三种阴离子中，Cl^-、HCO₃^-对铝合金点蚀起促进作用. Cl-与HCO₃^-交互作用时，在Cl^-浓度一定的情况下，随着HCO₃^-浓度的增加，5083铝合金耐蚀性呈现出上升→下降→再上升的趋势，在70～90 mg•L^-1时耐蚀性能明显降低；在HCO₃^-浓度一定的情况下，Cl^-浓度较低时5083铝合金耐蚀性比Cl^-浓度较高时差. 在Cl^-、 HCO₃^-浓度较低情况下，SO₄^2-具有抑制腐蚀的作用；当Cl^-、 HCO₃^-浓度较高时，SO₄^2-抑制腐蚀的作用不明显.

The interaction effects of typical anions, namely, Cl^-, HCO₃^- and SO₄^2-, presented in seawater environments on corrosion resistance behaviors of AA5083 aluminum alloy have been studied. The corrosion resistances of the 5083 aluminum alloy in different simulated seawater environments were tested by factorial analysis method. The polarization curves, the corrosion potentials, corrosion current densities and the breakdown potentials were examined in different concentrations of Cl^-, HCO₃^- and SO₄^2-.The corrosion behavior was analyzed by electrochemical impedance spectroscopy (EIS). The results showed that both Cl^-,  and HCO₃^- could accelerate the pitting corrosion. When the concentration of Cl^-,  remained constant, the corrosion resistance of AA5083 aluminum alloy increased initially with an increase in the concentration of HCO₃^-,and then dropped dramatically at 70～90 mg•L^-1, which displayed the best corrosion resistance performance. Afterwards, the corrosion resistance increased again. The corrosion current density of AA5083 aluminum alloy was not significantly affected by SO₄^2- when the concentrations of Cl^- and HCO₃^- became larger. Meanwhile, when the concentration of HCO₃^- was fixed, the charge-transfer resistance of AA5083 aluminum alloy at a lower Cl^-concentration was smaller than that at a higher Cl^- concentration, and the corrosive ions could easily penetrate the native oxide film by a redox reaction with the matrix.