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首页> 外文期刊>Journal of Thermal Spray Technology >Microstructure and Corrosion Behavior of Aluminum Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Oxygen–Acetylene Flame Spraying
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Microstructure and Corrosion Behavior of Aluminum Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Oxygen–Acetylene Flame Spraying

机译：通过高效超声等离子体喷涂和氧 - 乙炔火焰喷涂制备的铝涂层的微观结构和腐蚀行为

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摘要

Thermal spraying aluminum coatings have been widely used in the corrosion protection of mild steel in seawater. In this study, high-efficiency supersonic plasma spraying (HESP) and oxygen–acetylene flame spraying (FS) were used to prepare aluminum coatings. The micromorphology of the coatings was analyzed by a scanning electron microscope equipped with an energy-dispersive x-ray spectrometer. The phase identification of the coatings was conducted by an x-ray diffractometer. The Vickers hardness and bonding strength of the coatings were measured by an HMV-2000 Vickers hardness tester and MTS809 universal tensile tester. The corrosion resistance of the coatings was tested by an IM6ex electrochemical workstation. The results show that the aluminum coatings prepared by HESP have a denser structure, higher microhardness, higher bonding strength, and better corrosion resistance than those prepared by the traditional FS. After 480-h immersion in 3.5?wt.% NaCl solution, a dense corrosion product formed on the surface of aluminum coatings prepared by HESP prevents further corrosion of the coatings, but the aluminum coatings sprayed by FS demonstrate a serious pitting phenomenon.
机译：热喷涂铝涂层已广泛应用于海水中温和钢的腐蚀保护。在该研究中，使用高效的超声血浆喷涂（HEMP）和氧 - 乙炔火焰喷涂（FS）来制备铝涂料。通过配备有能量分散X射线光谱仪的扫描电子显微镜分析涂层的微观晶体。涂层的相位鉴定通过X射线衍射仪进行。通过HMV-2000维氏硬度测试仪和MTS809万向拉伸测试仪测量涂层的维氏硬度和粘合强度。通过IM6ex电化学工作站测试涂层的耐腐蚀性。结果表明，通过Hesp制备的铝涂层具有更密集的结构，更高的微硬度，更高的粘合强度，以及比传统FS制备的耐腐蚀性更好。在3.5℃下浸入3.5℃。％NaCl溶液中，在Hesp制备的铝涂层表面上形成的致密腐蚀产物可防止涂层进一步腐蚀，但是由FS喷涂的铝涂层展示了严重的点蚀现象。

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