氧化铈颗粒对铝合金阳极氧化膜性能的影响  

Effect of cerium oxide particles on properties of anodic oxide films on aluminum alloy

作　　者：赵刚[1] 张伟华[1] 赵铭涛 ZHAO Gang;ZHANG Weihua;ZHAO Mingtao(Qingdao Huanghai University,Qingdao 266427,China)

机构地区：[1]青岛黄海学院,山东青岛266427

出　　处：《兵器材料科学与工程》2022年第3期14-19,共6页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(52004323);青岛黄海学院校级科研项目(2019KJ04)。

摘　　要：在硫酸与酒石酸混合电解液中添加氧化铈颗粒,以2024铝合金作基体制备阳极氧化膜,研究氧化铈颗粒浓度对阳极氧化膜的微观形貌、表面成分、厚度、表面润湿性、耐蚀性能和硬度的影响。结果表明:随氧化铈颗粒浓度增加,阳极氧化膜的微观形貌和表面润湿性变化明显,孔隙率先降后升,导致耐蚀性能先逐步提高而后下降,硬度先增后减。氧化铈颗粒弥散分布既能均化电流分布使热量分散,抑制阳极氧化膜局部过度溶解,也参与成膜过程,可填充微孔,从而提高阳极氧化膜性能。氧化铈颗粒浓度为3 g/L制备的阳极氧化膜致密性良好且呈疏水状态,其孔隙率和腐蚀失质量最低,分别为12.4%、0.81 g/m^(2),电荷转移电阻最高,达5.35×10^(4)Ω·cm^(2),硬度最大,达430.6HV。Anodic oxide films were prepared on 2024 aluminum alloy using the sulfuric acid mixed with tartaric acid electrolytecontaining cerium oxide particles,and the effect of the concentration of cerium oxide particles on the micromorphology,surfacecomponents,thickness,surface wettability,corrosion resistance and hardness of anodic oxide films were investigated.Theresults show that as the concentration of cerium oxide particles increase,the micromorphology and surface wettability of theanodic oxide film change significantly,and the porosity firstly decreases and then increases,resulting in a gradually increaseand then decrease of the corrosion resistance and hardness.The hardness firstly increases and then decreases.Dispersiondistribution of cerium oxide particles can not only equalize the current distribution to disperse the heat,inhibit the localexcessive dissolution of the anodic oxide film,but also participate in the film formation process to fill the micropores,therebyimproving the properties of anodic oxide film.The anodic oxide film prepared with cerium oxide particle concentration of 3 g/Lhas good compactness and hydrophobic state,of which the lowest porosity and corrosion weight loss are 12.4%and 0.81 g/m^(2),and the highest charge transfer resistance and hardness are 5.35×10^(4)Ω·cm^(2) and 430.6HV respectively.

关 键 词：氧化铈颗粒 阳极氧化膜 孔隙率 表面润湿性 耐蚀性能 硬度 

分 类 号：TQ153.6[化学工程—电化学工业]