CAJ | 학술논문

目的：对混合酸电解液体系中2A12铝合金硬质阳极氧化膜层的制备及性能进行研究。方法采用以硫酸为主的混合酸电解液体系，对2A12铝合金进行硬质阳极氧化，研究混合酸电解液主要成分对2A12硬质阳极氧化膜层性能的作用和影响。结果在硫酸的溶解、有机酸吸附以及添加剂的耦合作用下，混和酸电解液避免了2A12铝合金硬质阳极氧化膜制备过程中存在的烧蚀现象，膜层平均硬度达到400HV0.05以上。 WX 添加剂能够明显改善2A12铝合金硬氧化膜层的耐蚀性能，经过168 h 的中性盐雾试验，仅出现了5%的白霜，但与相同厚度的7A04铝合金硬质阳极氧化膜层相比，耐蚀性较差。结论建议制备有耐蚀性要求的硬质阳极氧化膜层时选用铜含量较低的铝合金材料。
목적：대혼합산전해액체계중2A12려합금경질양겁양화막층적제비급성능진행연구。방법채용이류산위주적혼합산전해액체계，대2A12려합금진행경질양겁양화，연구혼합산전해액주요성분대2A12경질양겁양화막층성능적작용화영향。결과재류산적용해、유궤산흡부이급첨가제적우합작용하，혼화산전해액피면료2A12려합금경질양겁양화막제비과정중존재적소식현상，막층평균경도체도400HV0.05이상。 WX 첨가제능구명현개선2A12려합금경양화막층적내식성능，경과168 h 적중성염무시험，부출현료5%적백상，단여상동후도적7A04려합금경질양겁양화막층상비，내식성교차。결론건의제비유내식성요구적경질양겁양화막층시선용동함량교저적려합금재료。
Objective To study the properties of hard anodic oxide coatings on 2A12 aluminum alloy prepared in electrolyte of hybrid acids. Methods Hard anodic oxide coatings were prepared on 2A12 aluminum alloy surface in electrolyte of hybrid acids dominated by sulfuric acid. The effects of hybrid acids were analyzed and characterized. Results The results showed that the phe-nomenon of ablation could be avoided by the acts of H2 SO4 , organic acids and additive agents. The surface hardness of coating pre-pared in electrolyte of hybrid acids was above 400HV0. 05. Additive agent WX could increase the corrosion resistance of hard anod-ic oxide coatings on 2A12 aluminum alloy surface. Only 5% corrosion area of hard anodic oxide coating on 2A12 aluminum alloy surface was observed after 168 h of neutral salt spray test. Hard anodic oxide coatings on 7A04 aluminum alloy surface showed bet-ter corrosion resistance compared with the coatings on 2A12 aluminum alloy surface. Conclusion Aluminum alloys with lower Cu content are suggested for preparing hard anodic oxide coatings with better corrosion resistance.