采用电化学极化曲线方法、扫描电子显微镜 (SEM)研究了钼酸铵对铝合金在 3.5 % Na Cl溶液中的缓蚀作用 ,并讨论了钼酸铵对铝合金阴极作用系数、阳极作用系数与腐蚀电流的关系。实验结果表明 ,随着钼酸铵浓度的增大 ,缓蚀效率增大 ,达到一个最大值后基本保持不变。钼酸铵主要是通过抑制铝合金的阴极反应和阳极溶解来达到缓蚀作用的。 SEM实验表明 ,钼酸铵抑制了铝合金的点蚀 The corrosion inhibition effect of ammonium molybdate on aluminum alloy in 3.5% NaCl solution was studied by electrochemical polarization curve and scanning electron microscope (SEM). The effects of ammonium molybdate on the cathodic action coefficient, the anode action coefficient Relationship with corrosion current. The experimental results show that with the increase of ammonium molybdate concentration, the corrosion inhibition efficiency increases, reaching a maximum value after the basic unchanged. Ammonium molybdate mainly achieves corrosion inhibition by inhibiting the cathodic reaction and anodic dissolution of aluminum alloy. SEM experiments show that ammonium molybdate inhibits the pitting corrosion of aluminum alloy