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Improving corrosion protection of Al_(97)Mg_3 alloy in neutral sodium chloride solution by l,2-bis(triethoxysilyl)ethane coating

机译:l,2-双(三乙氧基甲硅烷基)乙烷涂层提高Al_(97)Mg_3合金在中性氯化钠溶液中的腐蚀防护

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摘要

We studied the protection of Al97Mg3 (Aluminium alloy 5754) against corrosion in neutral 3.5% NaCl solution by applying films of 1,2-bis(triethoxysilyl)ethane. The electrochemical characteristics of bare and coated alloy were evaluated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS). The surface morphologies and structures were assessed from field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray spectroscopy techniques (EDX) measurements. We used a simple immersion technique to achieve silane films formation over the alloy surface. The protection of the surface is due to the formation of a highly cross-linked and dense layer that developed at the interface between the silane film and the aluminum oxide.
机译:我们通过涂覆1,2-双(三乙氧基甲硅烷基)乙烷薄膜,研究了Al97Mg3(铝合金5754)在中性3.5%NaCl溶液中的腐蚀防护。使用电位动力学极化,电化学阻抗谱(EIS)评估裸露和涂层合金的电化学特性。表面形貌和结构通过场发射扫描电子显微镜(FESEM),X射线光电子能谱(XPS)和能量色散X射线能谱技术(EDX)进行评估。我们使用一种简单的浸入技术在合金表面上形成硅烷膜。表面的保护是由于在硅烷膜和氧化铝之间的界面上形成了高度交联的致密层。

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