2A12铝合金表面微弧氧化与性能研究  

Micro-arc Oxidation and Properties of 2A12 Aluminum Alloy

作　　者：常能[1] 刘睿军 

机构地区：[1]山东交通学院,山东济南250357 [2]山东理工大学材料科学与工程学院,山东淄博255049

出　　处：《铸造技术》2017年第12期2874-2876,共3页Foundry Technology

摘　　要：采用微弧氧化技术在2A12铝合金表面制备了二氧化锆陶瓷层,研究了电解液中锆盐浓度对微弧氧化膜层厚度、粗糙度、形貌和耐盐雾腐蚀性能,并对微弧氧化膜层的物相组成进行了分析。结果表明,经过微弧氧化处理后,膜层主要由AlMg_2O_4、ZrO_2、Zr_2O和Al_2O_3相组成;随着锆盐浓度的增加,微弧氧化膜层的厚度和粗糙度逐渐增加,膜层表观从优转变为一般;锆盐浓度为18 g/L的微弧氧化膜层的微孔区域的腐蚀产物相对更少,微弧氧化膜层的耐腐蚀性能相对较好。盐雾腐蚀优先在微弧氧化膜层的疏松层开始,对致密层的影响不大。The zirconia ceramic layer was prepared on the surface of 2 A12 aluminum alloy by micro-arc oxidation. The effect of solution concentration of zirconium salt in electrolyte on the thickness, roughness, morphology and salt spray corrosion resistance of zirconia ceramic layer, and the phase composition of the micro-arc oxidation coating was investigated. The results show that the coating is mainly composed of Al Mg2O4, ZrO2, Zr2 O and Al2O3 phases after micro-arc oxidation treatment. With the increase of zirconium salt concentration, the thickness and roughness of the coating increases gradually, and the apparent transform from preferential to general. The corrosion products of micro-arc oxidation coating with salt concentration of 18 g/L are relatively less, and the corrosion resistance of micro arc oxidation coating is better. The salt spray corrosion is firstly in the loose layer of the micro-arc oxide coating, which has little influence on the dense layer.

关 键 词：2A12合金 微弧氧化 膜层 盐雾腐蚀 性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]