泡沫铝阳极氧化工艺研究

介绍了泡沫铝阳极氧化工艺,通过试验对比分析了KD-SY酸蚀工艺和碱蚀工艺的差异,探讨了泡沫铝阳极氧化过程中,硫酸浓度、电流密度、温度、Al3+浓度、杂质元素对阳极氧化膜的影响.     

铝型材阳极氧化工艺条件对封孔质量的影响

通过实验，研究了铝型材阳极氧化工艺条件，即阳极氧化温度、电流密度、氧化时间、硫酸浓度和铝离子浓度对封孔质量的影响；讨论了这些因素对封孔质量的影响机理，选择了最佳的阳极氧化工艺条件。     

温度对铝阳极氧化的影响

为了提高铝合金零件的防腐蚀能力,增加零件耐磨性,铝及铝合金制品通常需要进行阳极氧化处理或硬质阳极氧化处理。铝的阳极氧化是以铝或铝合金作阳极,以铅板、不锈钢板作阴极,在硫酸、草酸、铬酸等水溶液中电解,使其表面生成氧化膜层。其中,硫酸阳极处理应用最为广泛。铝和铝合金硫酸阳极氧化膜层有较强的吸附能力,易进行封孔或着色处理,以提高其抗蚀性和美观性。阳极氧化膜层厚一般5—25um,铝合金硫酸阳极氧化工艺操作简单,电解液稳定,成本也不高,是成熟的工艺方法。     

铝型材阳极氧化工条件对封孔质量的影响

通过实验，研究了铝型材阳极氧化工工艺条件，即阳极氧化温度，电流密度，氧化时间，硫酸浓度和铝离子浓度对封孔质量的影响；讨论了这些因素对封孔质量的影响机理，选择了最佳的阳极氧化工艺条件。     

铝材及铝制品的化学抛光处理（5）：铝的抛光处理系列文章之五

铝中的杂质与合金元素对铝材的化学抛光效果有很大效果，工艺因素的影响小一些。铝越纯，抛光与阳极氧化处理后对光的反射率越高。阳极氧化膜层的厚度以１０μｍ左右最佳，不但有高的反射率，而且有良好的抗蚀性与耐磨性。     

铝及其合金彩色氧化

铝及其合金由于有比重轻、易加工等特点,在工业上应用越来越广泛,为了提高铝及其合金的抗蚀性能和装饰性,一般采用阳极氧化工艺使铝表面生成一层氧化膜。但长期以来以染单色为主,近来随着人民生活水平不断提高,对铝表面装饰也有新的要求——彩色化。广大表面处理工作者为了适应人民群众新花色要求已试验成功新的彩色氧化工艺,从而使氧化膜外观色彩绚丽,美观     

铝阳极氧化膜的耐磨性研究

用ＰＭＪ－Ⅰ型平面磨耗试验机,研究了合金成分,阳极氧化工艺条件、常温封孔对铝氧化膜耐磨性的影响,指出了阳极氧化温度、氧化是时间响氧化膜的耐磨性;而合金成分、常温封孔、电流密度、硫酸浓度和铝离子浓度对氧化膜的耐磨性影响不大。     

工业纯铝硬质阳极氧化的工艺研究

铝硬质阳极氧化法是一种厚层阳极氧化工艺,是铝及铝合金在硫酸电解液中,经过阶梯电流作用而进行的电化学反应.传统铝的硬质阳极氧化需要较低的温度和较高的电压.对工业纯铝在硫酸溶液中采用硬质阳极氧化的方法制取氧化膜的工艺进行了研究,在传统硫酸硬质阳极氧化工艺的基础上进行了改进.相同工艺条件下,在硫酸溶液中加入适量添加剂,可使氧化膜的成长速度大大提高,并拓宽了阳极化允许的温度范围,提高了阳极氧化生产效率.     

铝及铝合金铬酸阳极氧化工艺实践

介绍了锌及锌合金铬酸阳极氧化的电解液组成及工艺过程。讨论了工艺中各种因素包括铬酸浓度、工作条件、杂质离子对氧化膜的影响,给出了膜层抗蚀性能的检测方法及标准。     

铝阳极氧化膜在氯化钠溶液中的孔蚀行为(Ⅱ)--膜层的极化行为与孔蚀形貌

采用动态恒电位极化曲线方法。结合金相分析对铝硫酸阳极氧化膜在ＮａＣｌ溶液中的孔蚀行为机理进行了研究初探,实验表明：铝经硫酸阳极氧化处理后具有较高耐孔蚀性能,这是由于它表面生成了一层由阻挡层与多孔层所构成的特殊双层结构所引起。     

熔体发泡法制备泡沫铝材工艺探讨

介绍了泡沫铝材的发展过程；以研制过程为依据描述了制备泡沫铝材的基本流租及后续研究针对某些不易实现的工艺条件所做的改进；还就此工艺本身提出了需要解决的问题。     

腐蚀剂和氧化剂对硬铝（LY12）磷化过程的影响

讨论了硬铝（ＬＹ１２）在不同条件下磷化过程中腐蚀电位和电流的变化，即磷化膜的生长过程。结果表明硬铝在磷化过程中腐蚀电位、电流的变化与防锈铝的有明显区别，特别在开始阶段，腐蚀电位和电流急降。此外，还着重讨论了腐蚀剂（Ｆ＾－）含量对磷化膜重的影响。     

The replacement of chromate by molybdate in phosphoric acid-based etch solutions for aluminium alloys

Corrosion inhibition of aluminium alloys in the acidic solutions is important in the aluminium finishing industry (stripping solutions for anodic films). Sodium molybdate is a potential replacement for chromate-containing species used in the stripping solutions. It was tested as the corrosion inhibitor of 2024 aluminium alloy in orthophosphoric acid solutions. A corrosion rate of the alloy as a function of an initial concentration of sodium molybdate and temperature was determined by using gravimetric and gasometric methods. The corrosion rate was significantly lower in the solutions containing over 5?mM of sodium molybdate when compared to the uninhibited solution. The inhibition efficiency decreased with the increase of the temperature for the constant concentration of sodium molybdate. Sodium molybdate reduced the corrosion of the alloy by adsorption as well as formation of insoluble corrosion products on the alloy.     

连通孔泡沫铝材料的研究

采用渗流铸造法制作连通孔隙泡沫铝材料，即在压力作用下使熔融铝渗入食盐预制模的孔隙中，冷凝后再用水浸出食盐。研究了制作的工艺条件，测定材料的密度、透气度和除尘效率等性能。     

高防腐铝合金电缆桥架生产工艺

介绍了高防腐铝合金电缆线桥架的生产工艺,通过控制用料的质量、冲压、焊接和阳极氧化等因素,用６０６３合金型材和１０６０铝合金板材可以生产出性能优良的铝合金电缆桥架。     

Overall micro-arc oxidation treatment for AZ31B–6061 magnesium–aluminium dissimilar metal connecting parts

The magnesium–aluminium connecting parts are important application form for lightweight structural materials. But the conductive connect of magnesium and aluminium will cause serious galvanic corrosion problems. Therefore, the overall corrosion protective treatment is necessary. A ceramic coating was prepared via overall micro-arc oxidation to wrap the magnesium–aluminium connecting part integrally. The surface morphologies and compositions of the coatings were analysed by scanning electron microscopy and X-ray energy dispersive spectroscopy. The corrosion behaviour of the coatings was investigated with potentiodynamic polarisation tests in 3.5?wt-% NaCl solution. The growth process of ceramic coating on aluminium and magnesium surface was investigated, which showed the micro-arc oxidation reaction priority and the balanced growth process of ceramic coating under unbalanced micro-arc distribution. The results demonstrated that the overall micro-arc oxidation treatment improved the corrosion resistance and reduced the corrosion potential difference of each metal of magnesium–aluminium connecting part.     

Investigation of the influence of iron-containing abrasives on the corrosion behaviour of the aluminium alloy AlSi1.2Mg0.4

The corrosion resistance of aluminium surfaces is closely linked to the surface state after a grinding process. For years, iron-containing abrasive materials were suspected to lead to increased corrosion susceptibility after processing of aluminium surfaces. To prove a possible correlation between the iron content of an abrasive and the corrosion behaviour of aluminium components, scientific investigations and experimentally practical corrosion tests are necessary. For the current investigation, specimens of a technical Al-Si alloy from the same batch were used. The test specimens were mechanically ground with various resin-bonded model abrasives containing different iron contents. The performed corrosion tests did not reveal a negative influence of the different iron-containing abrasives on the corrosion behaviour of the Al–Si alloy. However, the most sensitive measuring method (electrochemical noise) showed differences in the surface activity depending on the type of abrasive.     

电解电容器用铝箔概述

讨论了电解电容器用电子铝箔的现状和发展方向。介绍了一些国内外电子铝箔的种类和牌号，电子铝箔和电极箔的一些特殊检测方法，如亮晶度法、残留铜分析法和氧化膜厚度估测法等。     

A two step anodizing process of aluminium as a means for improving the chemical and physical properties of oxide films

An anodizing process was developed to form corrosion resistant and hard oxide films on aluminium. The process consists of two steps: first the formation of chromate/phosphate treated layer on the surface of aluminium and secondly anodizing in a sulphuric acid solution. The anodic oxide films formed by the present process contain Cr(III) and phosphate species mostly in the outer part of the porous layer. The films formed by the present process provided a better corrosion resistance to the substrate aluminium from pitting in a chloride medium than the films formed by conventional anodizing and sealed in a boiling chromate solution. Further, Vickers hardness on the cross section of film increased compared with the films formed by conventional anodizing. This two step process can be developed to form other composite oxide films by using different treatments for the first step.