An anodization/γ-glycidoxypropyltrimethoxysilane (GPTMS) composite coating was prepared via anodization, followed by a siloxane sealing treatment with and without pre-sealing to improve the corrosion resistance of the 6061 Al alloy. Hot water sealing (HWS) was used as for pre-sealing, while the spinning and dipping methods for siloxane sealing treatment were compared. The morphology, structure, and chemical composition of the coatings with and without sealing were characterized by FE-SEM, EDS, FTIR, and XRD. It was found that the porous anodic film was completely sealed in the double-sealed samples, including the AHD (anodized/hot water pre-sealed/GPTMS sealed by the dipping process) and AHS (anodized/hot water pre-sealed/GPTMS sealed by the spinning process) coatings. In addition, the corrosion resistances of the coatings were evaluated using a potentiodynamic polarization test and salt spray test. The results indicated that the siloxane-sealed samples had significantly higher corrosion resistance than the hot water-sealed sample. The AHD and AHS coatings exhibited excellent corrosion resistance with absence of pitting corrosion after 336 h salt spray test. Moreover, scratch tests were carried out to measure the adhesion strength of the coatings, and the results revealed that the AHS coating had excellent adhesion strength. The effect of pre-sealing treatment on the anodized sample was also discussed.

通过阳极氧化制备阳极氧化/γ-环氧丙氧基丙基三甲氧基硅烷（GPTMS）复合涂层，然后在进行和不进行预密封的情况下进行硅氧烷密封处理，以提高6061铝合金的耐腐蚀性。预密封使用热水密封（HWS），而硅氧烷密封处理的纺丝和浸渍方法则进行了比较。用FE-SEM，EDS，FTIR和XRD对有密封和无密封的涂层的形貌，结构和化学组成进行了表征。发现多孔阳极膜完全密封在双密封样品中，包括AHD（阳极氧化/热水预密封/通过浸涂法密封）和AHS（阳极氧化/热水预密封/ GPTMS密封）。通过纺丝工艺）涂料。此外，用电位动力极化试验和盐雾试验评价涂层的耐腐蚀性。结果表明，硅氧烷密封的样品具有比热水密封的样品显着更高的耐腐蚀性。在336小时的盐雾试验后，AHD和AHS涂层表现出出色的耐腐蚀性，并且没有点蚀。此外，进行刮擦测试以测量涂层的粘合强度，结果表明AHS涂层具有优异的粘合强度。还讨论了预密封处理对阳极氧化样品的影响。在336小时的盐雾试验后，AHD和AHS涂层表现出出色的耐腐蚀性，并且没有点蚀。此外，进行刮擦测试以测量涂层的粘合强度，结果表明AHS涂层具有优异的粘合强度。还讨论了预密封处理对阳极氧化样品的影响。在336小时的盐雾试验后，AHD和AHS涂层表现出出色的耐腐蚀性，并且没有点蚀。此外，进行刮擦测试以测量涂层的粘合强度，结果表明AHS涂层具有优异的粘合强度。还讨论了预密封处理对阳极氧化样品的影响。