镁合金表面热扩渗金属防护层的制备与性能  

Fabrication and Properties of Protective Metal Coatings Obtained by Surface Thermal Diffusion on Magnesium Alloys

作　　者：路东柱[1,2,3,4,5] 蒋全通 李家威 马秀敏 樊亮[1,2,4] 黄彦良 侯保荣 LU Dong-zhu;JIANG Quan-tong;LI Jia-wei;MA Xiu-min;FAN Liang;HUANG Yan-liang;HOU Bao-rong(CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Sciences,Nanning 530007,China;Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China;Nantang Zhongke Marine Science and Technology R&D Center,Nantong 226006,China;School of Materials Science&Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]中国科学院海洋研究所中国科学院海洋腐蚀与生物污损重点实验室,山东青岛266071 [2]青岛海洋科学与技术(试点)国家实验室海洋腐蚀与防护开放工作室,山东青岛266237 [3]广西科学院广西近海海洋环境科学重点实验室,广西南宁530007 [4]中国科学院海洋大科学研究中心,山东青岛266071 [5]南通中科海洋科学与技术研究发展中心,江苏南通226006 [6]齐鲁工业大学(山东省科学院)材料科学与工程学院,山东济南250353

出　　处：《材料保护》2023年第1期134-145,162,共13页Materials Protection

基　　金：国家自然科学基金项目(41827805);青岛海洋科学与技术试点国家实验室山东省专项经费“问海计划”项目(2021WHZZB2302);广西近海海洋环境科学重点实验室开放基金项目(GXKLHY22-01);海外科教合作中心部署项目(121311KYSB20210005);保定市科技计划项目(2022创009);南通市科技计划项目(JC2021022)资助。

摘　　要：镁合金是一种轻质结构材料,将镁合金应用在交通工具中,可以降低其整体质量和能源消耗,同时提升其机动性能和续航能力。然而,镁合金易腐蚀,需强化其耐蚀性。表面扩渗法是一种常见的镁合金表面强化方法。在一定温度下,扩渗剂中的金属元素向镁合金表面传输,并形成一层防护层。首先介绍了几种常见的镁合金表面扩渗法,继而介绍了镁合金表面热扩渗的主要影响因素,然后介绍了采用这种方法制备的扩渗层的性能。在镁合金表面热扩渗形成的典型扩渗层厚度可达数百微米,同时扩渗层硬度和耐蚀性相对基体有明显提升。表面热扩渗可对镁合金进行有效的表面强化。Magnesium alloy is a light-weight structural material.Applying this material in vehicles can reduce the vehicles’overall mass and energy consumption and improve their mobility and endurance.However,magnesium alloys are prone to corrosion,and their corrosion resistance needs to be enhanced.The surface diffusion method is a common surface strengthening method for magnesium alloys,in which the metal elements in the diffusion agent are transported to the surface of the magnesium alloy at a certain temperature and finally form a protective layer.Firstly,several common methods of surface diffusion on magnesium alloys were introduced in this paper.Secondly,the main influencing factors of thermal diffusion on the surface of magnesium alloys were summarized.Finally,the performance of the diffusion layer prepared by this method was introduced.The thickness of a typical diffusion layer formed by thermal diffusion on the surface of magnesium alloy could reach hundreds of microns,and the hardness and corrosion resistance of the diffusion layer were significantly improved compared with those of the substrate.Overall,surface thermal diffustion could effectively strengthen the surface of magnesium alloys.

关 键 词：镁合金 热扩渗 包埋渗 渗金属 金属涂层 表面防护 

分 类 号：TG156.8[金属学及工艺—热处理]