在含Ni~（2＋）和BF_4~－溶液中阳极氧化铝冷封闭机理的研究

本文利用含Ｎｉ~（２＋）和ＢＦ_４~－的溶液研究了铝的多孔氧化膜室温下的封闭过程．实验结果显示：在封闭过程中，氟离子浓度可在一定范围内自动调整且较厚的膜也能易于封闭．根据实验结果，提出了封闭机理．     

Influence of copper on the morphology of porous anodic alumina

Sputtering-deposited Al-Cu alloy layers and an Al-Cu/Al bi-layer are used to investigate the influences of copper on the morphology of porous anodic alumina films formed galvanostatically in either sulphuric or phosphoric acid electrolyte. The results reveal development of an irregular morphology of pores during anodizing of the alloy layers, contrasting with the linear porosity of films formed on aluminium. Further, the rates of film growth and alloy consumption are relatively low, since oxygen is generated following enrichment of copper in the alloy and incorporation of copper species into the anodic film. The linear morphology is re-established following depletion of the copper in the bi-layer and at the same time, film growth accelerates as oxygen evolution diminishes. The irregular pore morphology is considered to arise from stress-driven pore development influenced by effects of oxygen bubbles within the anodic alumina.     

铝的阳极氧化和电解着色——Ⅲ.影响阳极氧化膜性能的因素

本文通过改变电流密度、电解电压、硫酸浓度、铝离子浓度、氧化温度、氧化时间、搅拌、及串并联等条件,讨论了影响硫酸法阳极氧化膜性能的各种因素。发现影响氧化膜厚度的主要因素是电流密度、电解温度、氧化时间和硫酸浓度。本文同时研究了减小氧化膜脆性的几种方法,提出了提高硫酸法阳极氧化膜抗裂性的工艺条件。     

Micro-patterning in anodic oxide film on aluminium by laser irradiation

Microstructures such as microchannels and microchambers were fabricated on anodic oxide film of aluminium with laser direct patterning technique. The aluminium substrate covered with porous type anodic oxide film was dyed with organic dyes followed by hydrothermal treatment. The coloured and pore sealed film shows much higher absorption then as-formed porous film, that makes possible to pattern various types of microstructures on the film by removing the upper part of the film surface by laser irradiation. Structure of the crystallized hydroxide layer on the surface of the anodic oxide film, formed during pore sealing, as well as the partial removal of anodic oxide film from the surface is described. Microstructures with depth lower than 1-27 μm were patterned successfully on 16 and 32 μm thick anodic oxide film surfaces, using various combinations of laser power and laser scanning speed. The affect of the laser scanning speed and laser power density on the shape of the microstructures is also explained.     

2024Al和SiCp／2024Al基复合材料阳极氧化膜的耐蚀性

用动电位阳极极化和电化学阻抗技术研究了SiCp／2024Al复合材料硫酸阳极氧化膜在3．5％NaCl水溶液中的耐蚀性；作为比较，对2024Al的阳极氧化膜耐蚀性也进行了研究。结果表明，经阳极氧化处理的SiCp／2024Al复合材料具有良好的耐NaCl溶液腐蚀的能力，其腐蚀速度较未处理的样品降低了2个数量级以上。但其耐蚀性不如2024Al合金的阳极氧化膜。这是由于氧化膜中SiC颗粒的存在破坏了氧化膜的完整性和均匀性所致。对SiCp／2024Al MMC，采用小电流密度来进行阳极氧化处理，可获得较好的防护效果。此外，阳极氧化膜层的抗蚀性随浸泡时问的增加有降低的趋势。     

铝合金磷酸阳极化和胶接性能分析

采用磷酸阳极化方法对铝合金试片进行了处理并考察了其粘接性能。阳极化处理使铝合金试片表面产生了微观粗糙的多孔膜，最初形成的孔互不连通，随着阳极化过程的继续，孔与孔之间互相贯通；胶接时胶粘剂能够渗入多孔膜，并在粘接界面上形成过渡层，实现良好的机械啮合。经阳极化处理后，铝合金试片粘接性能显著提高，拉剪强度在粘接副为铝合金时提高了238％，粘接副为铝合金／复合材料时提高了104％，且破坏模式为混合破坏。对粘接副的耐候性进行了考核，在25～70℃时，其拉剪强度保持不变，100℃时拉剪强度为30．25MPa，与常温拉剪强度相比下降了19．2％；粘接副经碱水浸泡后拉剪强度降低，经过100h浸泡后拉剪强度为35．55MPa，降低了8．1％。     

Corrosion resistance of oxide layers formed on AZ91 Mg alloy in KMnO4 electrolyte by plasma electrolytic oxidation

The plasma electrolytic oxidation (PEO) process in AZ91 Mg alloy is studied using a solution containing KOH + KF + Na₂SiO₃ both with and without potassium permanganate (KMnO₄). The addition of potassium permanganate to the electrolyte influences coating thickness, surface morphology and the microstructure of oxide layers obtained by the PEO process. Oxide layers formed on AZ91 Mg alloy by the electrolyte containing KMnO₄ consists of MgO, MgF₂, Mg₂SiO₄ and Mn₂O₃. The corrosion resistance of the sample processed in bath containing KMnO₄ was superior to that of the sample processed in the bath without KMnO₄. It is suggested that enhancement of the corrosion resistance of AZ91 Mg alloy depends strongly on the presence of manganese oxide in the oxide layer.     

A231镁合金表面阳极氧化工艺研究

采用正交设计方法,研究了AZ31镁合金表面阳极氧化工艺配方.采用扫描电镜(SEM)、能谱分析仪(EDS)、X射线衍射法(XRD)、动电位极化曲线测量方法评价了优化工艺配方条件下阳极氧化膜的微观成分结构及其耐蚀性能.结果表明:经优化配方阳极氧化处理可以显著改善AZ31镁合金的耐腐蚀性能,且经沸水封孔处理可以有效地封闭氧化膜中的裂纹,进一步提高膜层的耐腐蚀性能.     

铝合金材质硬质阳极氧化工艺方法的应用分析

以硬质阳极氧化工艺方法改善铝合金材料表面性能为目的,首先概述了硬质阳极氧化工艺的发展概况,然后比较详细地分析了铝合金硬质阳极氧化膜的结构成分、特点、封闭后处理;最后研究了铝合金材质在硬质阳极氧化时的需考虑的影响因素、工艺要求和性能要求,并以铝合金液压阀岛的零件为例对其进行硬质阳极氧化的工艺分析,得出了具体的硬质阳极氧化的工艺流程,这对铝合金材质的其它零件应用硬质阳极氧化工艺方法提供了有意义的参考价值。