为提高铝合金耐腐蚀力，运用正交试验法研究在铝合金表面制备 γ-（2，3-环氧丙氧）丙基三甲氧基硅烷（GPTMS）自组装膜最佳工艺条件，利用极化曲线和扫描电子显微镜研究该硅烷膜在铝合金表面的耐腐蚀性能。研究表明：最佳工艺条件为 100 mL溶液中， pH＝4. 5，V（GPTMS）∶V（EtOH）∶V（H2O）= 2∶7∶91，T1（水解温度）＝25 ℃，t1（水解时间）＝7 h，t2（浸涂时间）＝10 min，t3（固化时间）＝90 min，T2（固化温度）＝120 ℃，该工艺条件下制备的硅烷膜具有优异的耐腐蚀性能。
The optimal process conditions for preparation of self-assembly film were designed by orthogonal experiment with γ-glycidoxypropyl trimethoxy silane（GPTMS）and the silane films were prepared on the surface of aluminum alloy to improve its corrosion resistance.The corrosion resistance of the optimal films on the surface of aluminum alloy was studied by polarization curveand scanning electron microscope（SEM）. The results indicated that the optimal process conditions were as follows：the pH value of the solution 4. 5，V（GPTMS）∶V（EtOH]∶ V（H2O）=2∶7∶91，T1（hydrolysis temperature）=25 ℃，t 1（hydrolysis time）=7 h，t 2（immersion time）=10 min，t 3（curingtime） = 90 min，T 2（curing temperature）=120 ℃，The silane films on aluminum alloy in this condition provided good corrosion resistance.
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