Abstract: AZ31 magnesium alloy was surface treated with KH-550 silane solutions, forming a colorless and transparent silane m, salt solution immersion and polarization tests were conducted to investigate the corrosion behavior of the coated magnesium alloy treated by five silane solutions with different silane concen-trations. The results indicated that when the concentration of KH-550 was 8%, the immersion time 50 s,and heated at 100 C for 0. 5 h after surface dry, the interfacial bonding strength between the prepared silane film and Az31 magnesium alloy was excellent and the corrosion resistance of magnesium alloy was greatly improved by silane treatment.

Key words: AZ31 magnesium alloy, silane treatment, corrosion morphology, polarization curve;corro-sion resistance, bonding strength

摘要： 采用 ＫＨ－５５０硅烷溶液对 ＡＺ３１镁合金试片进行硅烷处理，形成一层无色透明的有机硅薄膜。通过盐水浸泡和电化学测试技术对不同硅烷浓度下所制备的硅烷膜性能进行评定，结果表明，在浓度为 ８％的硅烷溶液中浸涂５０ｓ，表干后在 １００℃ 陈化 ０.５ｈ，所形成的硅烷膜层与镁合金基体之间的界面结合较好，很好地抑制了镁合金的腐蚀，提高了其耐腐蚀性能。

关键词: ＡＺ３１镁合金, 硅烷处理, 腐蚀形貌, 极化曲线, 耐蚀性, 粘结强度