冷喷涂及阳极氧化复合处理对WE43镁合金耐蚀性能的影响  

Effects of Cold Spraying and Cold Spraying-anodizing Treatment on the Corrosion Resistance of WE43 Magnesium Alloy

作　　者：刘曜熙 陈乐平[1] 周全[1] 袁源平 刘武平 Liu Yaoxi;Chen Leping;Zhou Quan;Yuan Yuanping;Liu Wuping(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University)

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2023年第11期1561-1565,共5页Special Casting & Nonferrous Alloys

基　　金：江西省科技重点研发计划资助项目(20212BBE53018);南昌航空大学研究生创新专项资金资助项目(YC2022-018)。

摘　　要：通过冷喷涂、冷喷涂-阳极氧化对WE43镁合金进行复合表面处理,采用高锰酸钾点滴试验,动电位极化曲线,扫描电镜(SEM/EDS),X射线衍射(XRD)等测试手段,研究了涂层的腐蚀行为。结果表明,经冷喷涂处理制备的涂层表面致密,相较于镁合金基体自腐蚀电位提高了0.864 V,自腐蚀电流密度降低至2.1×10^(-5)A/cm^(2),点滴试验时间由5 s增加至59 s;冷喷涂-阳极氧化复合涂层相较于镁合金基体自腐蚀电位提高了1.097 V,自腐蚀电流密度降低至3.16×10^(-7)A/cm^(2),自腐蚀电流密度相较于单一冷喷涂处理下降了两个数量级,点滴试验时间由5 s增加至478 s;采用冷喷涂处理和冷喷涂-阳极氧化复合处理均能提高WE43镁合金的耐蚀性能。The composite surface treatment of WE43 magnesium alloy was carried out by cold spraying and cold sprayinganodizing treatment.The corrosion behavior of the coating was analyzed by potassium permanganate drop test,potentiodynamic polarization curve,scanning electron microscopy(SEM/EDS),X-ray diffraction(XRD)and other test methods.The results reveal that the surface of pure aluminum coating prepared by cold spraying treatment presents dense.Compared with the magnesium alloy substrate,the self-corrosion potential of the pure aluminum coating is increased by 0.864 V,and the self-corrosion current density is reduced to 2.1×10^(-5)A/cm^(2).The drip time is increased from 5 s to 59 s.Compared with the magnesium alloy substrate,the self-corrosion potential of the cold spraying-anodic oxidation composite coating is increased by 1.097 V,the self-corrosion current density is reduced to 3.16×10^(-7)A/cm^(2),and the self-corrosion current density is reduced by two orders of magnitude compared with those of the single cold spraying treatment.Drip test time is increased from 5 s to 478 s.In anclusion,the corrosion resistance of WE43 was improved by cold spraying and cold spraying-anodic oxidation composite treatment.

关 键 词：WE43镁合金 冷喷涂 冷喷涂-阳极氧化 耐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理] TG146.22[金属学及工艺—金属学]