铝合金阳极氧化膜沸水-稀土盐双重封闭及力学性能研究  

Dual Sealing of Anodic Oxidation Film on Aluminum Alloy with Boiling Water and Rare Earth Salt and Mechanical Properties

作　　者：邱小云 王冀恒[2] QIU Xiaoyun;WANG Jiheng(School of Intelligent Manufacturing,Nanjing Polytechnic Institute,Nanjing 210048,China;School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212000,China)

机构地区：[1]南京科技职业学院智能制造学院,江苏南京210048 [2]江苏科技大学材料科学与工程学院,江苏镇江212000

出　　处：《电镀与精饰》2022年第7期30-35,共6页Plating & Finishing

基　　金：江苏省高校品牌专业建设工程资助项目(PPZY2015C232);江苏省高等职业教育高水平专业群建设项目(苏教职函〔2021〕1号:1-10)。

摘　　要：在铝合金表面制备阳极氧化膜,并采用环保型沸水封闭与稀土盐封闭方法相结合对阳极氧化膜进行双重封闭。研究了双重封闭后阳极氧化膜的微观形貌、厚度、硬度、弹性恢复能力和摩擦性能,并与未封闭阳极氧化膜和单一封闭后阳极氧化膜比较。结果表明:单一封闭和双重封闭对阳极氧化膜的厚度影响较小,但封闭前后微观形貌明显不同。与未封闭阳极氧化膜相比,双重封闭阳极氧化膜的硬度提高了约26%,达到347.5 HV,弹性模量提高了约27.8%,达到52.068 GPa,摩擦因数和磨损失重仅为0.37、2.08 mg/mm^(2)。主要原因在于为双重封闭过程中发生多个反应,反应产物较好的封堵孔洞,更大程度改善阳极氧化膜的致密性,使其承载能力和抗塑性变形能力增强,从而表现出良好的力学性能。Anodic oxidation film was prepared on the surface of aluminum alloy,and it was treated by a combination of environmentally-friendly boiling water sealing and rare earth salt sealing methods.The microstructure,thickness,hardness,elastic recovery ability and friction property of the anodic oxidation film after dual sealing were studied,and compared with that of unsealed anodic oxidation film and the anodic oxidation film after single sealing.The results show that single sealing and dual sealing have little effect on the thickness of anodic oxidation film,however the microstructure of the anodic oxidation films before and after sealing is significantly different.Compared with the unsealed anodic oxidation film,the hardness of the anodic oxidation film after dual sealing is increased by about 26%to 347.5 HV,the elastic modulus is increased by about 27.8%to 52.068 GPa,and the friction factor and abrasion loss are only 0.37 and 2.08 mg/mm^(2).The main reasons are attributed to multiple reactions occurring during the dual sealing process,the reaction products effectively seal the pores,improve the compactness of the anodic oxidation film to a greater extent and enhance the bearing capacity and resistance to plastic deformation,thus exhibit good mechanical properties.

关 键 词：沸水-稀土盐双重封闭 阳极氧化膜 硬度 弹性恢复能力 摩擦性能 

分 类 号：TQ153.6[化学工程—电化学工业]