Abstract: Arc sprayed metal coating is an important method for the protection of steel structure. Due to development of last several decades, it has become a mature surface engineering technology and industry. Meanwhile, with the development and research of new spraying processes, equipment and materials, the application fields of it are increasingly widespread. At the same time, the shortcomings of arc spraying technology are becoming more and more prominent, especially the problems of harmful substances discharged during the spraying process, which seriously restricts its development. The coating prepared by arc spraying exhibits low porosity, compact microstructure, high bonding strength and good economy. Compared with other traditional anti-corrosion technologies, arc-sprayed metal coatings have the following advantages: (ⅰ) high efficiency of arc spray deposition, easy operation, and easy on-site construction; (ⅱ) the service life of the coatings is long. However, the coatings fabricated by arc spraying technology are used in different service environments, which puts higher requirements on the corrosion resistance of the coating. Therefore, in addition to studying the parameters of arc spraying process in recent decades, researchers have focused on the development of multi-functional, high-performance spraying materials, and have achieved fruitful results. Basing on the advantages of arc spraying technology, the performance of coating will be enhanced significantly. At present, materials employed to deposited coatings are developing in the direction of composite and new-type. Materials, such as Zn, Al and their alloys, Ni-based alloys, Fe-based alloys and Cu-based alloys, have been widely used in the protection of steel structures. Among them, Zn, Al and their alloys are the earliest and most used spraying materials; Ni-based alloys can improve the corrosion resistance of materials by adding Cr, Mo and other alloying elements, which are resistant to pitting and crevice corrosion; the addition of a small amount of Mo and other elements to the Fe-based alloy can effectively inhibit the occurrence of grain boundary corrosion; the incorporating of 1% Sn to the Cu-based alloy can inhibit the dezincification process of the alloy and improve the mechanical properties. Recently, the research focuses on the use of a variety of alloy materials and the use of new alloy materials, and the arc spray technology is used as a means to prepare corrosion-resistant coatings, which can achieve double improvement in the function and performance of coatings. Based on the analysis of the corrosion law of steel structures in various areas of the coastal marine environment, this paper compares the current methods for corrosion protection of steel structures and their advantages and disadvantages. The research status and anti-corrosion mechanism of arc spray coatings are expounded. From the aspects of microstructure, coating properties and anti-corrosion mechanism of arc sprayed mental coatings, the problems of anticorrosion of arc sprayed metal coatings are analyzed and their prospects are prospected, and ultimately as a reference to provide long-term protection for steel structures in industrial fields.
作者简介: 徐金勇,2018年6月毕业于上海应用技术大学,获得工学学士学位。现为扬州大学机械工程学院硕士研究生,在张超教授的指导下进行研究。目前主要研究领域为热喷涂金属基涂层。 张超,扬州大学机械工程学院教授、博士研究生导师。2003年7月本科毕业于重庆大学机械工程学院,2009年1月在西安交通大学材料加工工程专业取得博士学位,2009—2013年在比利时蒙斯大学工学院进行博士后研究工作。2014年1月回国后,先后入选第四批江苏省特聘教授计划、“扬州市十大杰出青年”提名奖。主要从事热喷涂功能与结构涂层的研究工作。近年来,在热喷涂功能与结构涂层领域发表论文70余篇,包括Journal of Coating Science and Technology、International Journal of Materials Science and Application、Surface & Coa-tings Technology、Journal of Thermal Spray Technology、Journal of Alloys & Compounds和Ceramics International等。
引用本文:
徐金勇, 吴庆丹, 魏新龙, 肖金坤, 张超. 电弧喷涂耐海水腐蚀金属涂层的研究进展[J]. 材料导报, 2020, 34(13): 13155-13159.
XU Jinyong, WU Qingdan, WEI Xinlong, XIAO Jinkun, ZHANG Chao. Research Progress on Arc Sprayed Metal Coatings for Seawater Corrosion Protection. Materials Reports, 2020, 34(13): 13155-13159.
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