首页> 外文会议>Materials Science amp; Technology(MSamp;T) 2006: Materials and Systems vol.2 >Novel Anti-Corrosion Nano-Sized Ceramic-Based Thin Films Prepared by Sol-Gel Method for Aluminum Alloys
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Novel Anti-Corrosion Nano-Sized Ceramic-Based Thin Films Prepared by Sol-Gel Method for Aluminum Alloys

机译:溶胶-凝胶法制备铝合金新型耐腐蚀纳米陶瓷基薄膜

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Chromate conversion coatings have been widely applied for the corrosion protection of aluminum alloys. However, the waste containing Cr~(6+) has many limitations due to the environmental consideration and health hazards. Vanadia, ceria, silica and molybdate are among the proposed alternatives to chromating. The surface of the specimens were modified under different conditions and then dipped in a corresponding salt solution prepared via sol gel method. EIS and polarization measurements have been used to evaluate the coating performance in 3.5% NaCl. The optimum conditions under which such treatments can provide good corrosion protection to the aluminum substrate were determined. The surface morphologies of the treated samples were investigated using SEM and EDS. Optical microscope was also used to investigate the occurrence of pitting corrosion. The surface preparation prior to sol gel treatment was found to have a marked effect on the corrosion protection of AA6061 T6.
机译:铬酸盐转化膜已被广泛应用于铝合金的腐蚀防护。然而,由于对环境的考虑和对健康的危害,含Cr〜(6+)的废物具有许多局限性。钒,二氧化铈,二氧化硅和钼酸盐是建议的铬酸盐替代品。样品的表面在不同条件下进行了修饰,然后浸入通过溶胶凝胶法制备的相应盐溶液中。 EIS和极化测量已用于评估3.5%NaCl中的涂层性能。确定了这样的处理可以对铝基板提供良好的腐蚀防护的最佳条件。使用SEM和EDS研究了处理过的样品的表面形态。光学显微镜还用于调查点蚀的发生。发现溶胶凝胶处理之前的表面处理对AA6061 T6的腐蚀防护具有显着影响。

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