甲酸盐镀液性能的研究

研究了甲酸镍－氯化镍型镀液的性能，测定了电流效率，缓冲容量，导电性，阴极极化曲线及分散能力等。     

三价铬镀液电镀黑铬工艺研究

经正交试验确定了三价铬电镀黑铬的最佳镀液组成和工艺条件,并对优选的三价铬镀液及镀层进行性能测试,结果表明:镀液的分散能力约为15%;镀液的覆盖能力约为95%;还测定了几种镀液的阴极极化曲线,并进行了比较,最优镀液的阴极极化曲线的极化度最大。电镀5 m in的镀层厚度约为0.5μm,镀层的主要组分为C r、O、Co、P和N a。     

酸性镀铜光亮剂的研究

介绍了酸性镀铜光亮剂，并与使用较多的两种国外酸铜光亮剂的阴极极化曲线，镀液的深镀能力，均镀能力，耐温工作范围等作了对比。酸铜光亮剂耐高温可达40℃，其深镀能力，均镀能力与国外酸铜光亮剂相当。其取极极化曲线与国外酸铜光亮剂的阴极极化曲线形状相似，峰值电位和峰值电流相近，极化值与极化度近于相等。     

弱酸性镀液电镀锌-铁合金工艺

简述了氯化钾体系中镀锌-铁合金工艺的各种添加剂,确定了氯化钾镀锌-铁合金的电镀工艺范围和操作条件,并进行了分散能力﹑深镀能力﹑电流效率﹑阴极极化曲线﹑沉积速度﹑镀层脆性﹑结合力及耐蚀性等镀液镀层的性能测试.     

JD电镀黑铬溶液添加剂作用的研究

本文对含有JD-1型添加剂的黑铬电镀溶液的分散能力、深镀能力、阴极极化曲线、镀层的硬度、耐磨性、耐蚀性、光学性能、镀层应力及其与基体材料的结合力作了测定,还研究了镀层的表面形貌。阐明了该添加剂的含量与镀液性能和镀层性能的关系,展示了JD型黑铬电镀工艺在生产上获得应用的原因及广泛的应用前景。     

铈对锌-铁合金电沉积的影响

研究了铈对电沉积锌-铁合金镀液及镀层性能的影响,通过分散能力、阴极极化曲线测定,得出在镀液中添加一定量的氯化亚铈能改善镀液性能。通过镀层耐蚀性、抗高温氧化性及镀层表面形貌测试表明,定量铈的参与,可获得更加致密的镀层,可有效提高镀层的耐蚀性及抗高温氧化性。     

酸性光亮镀Sn的研究

以SnSO_4和H_2SO_4作为镀液的基本成分,依靠组合添加剂提高镀液的阴极极化,改善了镀液的分散能力和覆盖能力,得到细致光亮的镀sn层。     

光亮镍磷合金镀液中添加剂作用的研究

研究了镍磷合金镀液中不同添加剂的作用，结果表明，含吡啶衍生物作为添加剂的镀液具有较高的阴极极化度、电流效率、分散能力和镀层光亮度，而且所有这些性能均优于用果糖作添加剂的镀液。     

氯化物电镀哑光锌工艺

哑光锌添加剂LAN-616含载体添加剂和主、辅添加剂,经大量的试验筛选后,能很好地满足镀哑光锌的要求.确定了电镀哑光锌工艺范围及工艺条件,并进行了分散能力、深镀能力、电流效率、阴极极化曲线、沉积速率,抗杂质能力等测试.     

全硫酸盐常温三价铬镀铬工艺

介绍了DS-5000硫酸盐体系三价铬电镀工艺,详细说明了镀液中各成分的作用、镀液维护和工艺条件。赫尔槽试验和阴极极化曲线测量表明,该工艺的镀液分散能力、覆盖能力、极化值和镀层外观等均略优于国外某同类产品。该工艺在常温下操作,镀液十分稳定,突破了许多硫酸盐三价铬镀铬生产中p H总是下降的问题,且基本不生成六价铬离子,维护相对容易。     

废杂铜的回收与利用

介绍了我禺铜的需求及资源状况,提出了我国废杂铜回收利用的必要性。总结了国惠废杂铜的分类方法和废杂铜回收利用的现状以及废杂铜的回收处理方法,并针对国内废杂铜的回收利用情况提出了意见与建议,希望能够为我国废杂铜的回收利用提供参考。     

熔融铜渣回收铜及铜铁合金工艺研究

本文根据某炼铜熔融炉渣的矿物特性和选矿工艺特点,提出了一种"两步法"新工艺分别回收铜和铜铁合金,即低温阶段回收铜,高温阶段回收铜铁合金。该工艺对铜和铜铁合金提取比较充分,回收率均在90%以上。回收铜的品位可达99%,可直接送去火法精炼;产出的铜铁合金有害杂质少,可作为耐候钢的理想原料,其价值比纯铁高。此工艺用粉状或粒状非焦煤代替焦炭作还原剂,不用烧结,可以充分利用铜厂现有的设备,节省投资成本。该工艺简单易行,操作方便,有效实现了铜渣的资源化利用,具有良好的经济、社会和环境效益,是一种应用前景广阔的铜渣再利用工艺。     

Copper removal during formation of corrosion resistant alkaline oxide coatings on Al–Cu–Mg alloys

The performance of corrosion resistant inorganic oxide coatings formed on Al–Cu–Mg alloys is often degraded by Cu enrichment that occurs during oxide formation. This is particularly true of coating processes conducted in basic solutions. A modification to an alkaline oxide coating process has been made that simultaneously eliminates Cu enrichment and forms a corrosion resistant coating. In this paper, the modified process is described and the resulting coating morphology, structure and composition are reported. Results from electrochemical and exposure corrosion tests show that useful gains in corrosion resistance are achieved. Cu removal during the modified process is rationalized using an argument based on the increase in Cu solubility that occurs in solutions with a pHgreater than the solubility minimum for Cu (9.8), and the effect of Cu complexing by carbonate.     

Copper nucleation on titanium for thin film applications

Copper nucleation and growth on titanium substrates from concentrated acidic copper sulfate solutions was studied at 45 and 65C and high cathodic potentials. Electrochemical experiments allied to SEM examination were performed to characterize the mechanism of nucleation and its evolution with time. Particular emphasis was given to the influence of potential and agitation on the initial stages of nucleation and growth. Results indicated that most of copper nucleation on titanium from a 83g dm^–3 Cu²⁺ solution, at 65 C, is achieved in a matter of milliseconds. As expected, the initial stages of the copper nucleation and growth is strongly dependent of potential and temperature, and the influence of agitation is only evident at very high potentials. The calculated diffusion coefficients for Cu²⁺ at 45 and 65 C, under the experimental conditions, were found to be 9.16 × 10^–6 and 1.62 × 10^–5cm² s^–1, respectively.     

An Analysis of Contemporary Copper Recycling in China

Copper consumption increased very quickly in China in recent years, which could not be met by inland copper industry. In order to achieve a sustainable development of copper industry, an analysis of copper recycling in China was necessary. For the life cycle of copper products a copper-flow diagram with time factor was worked out and the contemporary copper recycling in China was analyzed, from which the following data were obtained. The average life cycle of copper products was 30 years. From 1998 to 2002, the use ratio of copper scraps in copper production, the use ratio of copper scraps in copper manufacture, the materials self-support ratio in copper production, and the materials self-support ratio in copper manufacture were 26.50%, 15.49%, 48.05% and 59.41%, respectively. The materials self-support ratios in copper production and manufacture declined year by year in recent years on the whole, and the latter dropped more quickly. The average index of copper ore and copper scrap from 1998 to 2002 were 0.8475 t/t and 0.0736 t/t, respectively; and copper resource efficiency was 1.1855 t/t. Some efforts should be paid to reduce copper ores consumption and promote copper scraps regeneration. Copper scraps were mostly imported from foreign countries because of shortage in recent years in China. Here the reasons related to copper scraps deficiency were also demonstrated. But we can forecast: when copper production was in a slow rise or in a steady state in China, the deficiency of copper scraps may be mitigated; when copper production was in a steady state for a very long time, copper scraps may become relatively abundant. According to the status of copper industry in China, the raw materials of copper production and manufacture have to depend on oversea markets heavily in recent years, and at the same time, the copper scraps using proportion and efficiency in copper industry should be improved.     

铜及铜合金着色

简述了铜及铜合金着色的原理.总结了铜及铜合金着黑色、褐色、绿色、蓝色的工艺配方及操作条件,介绍了手工点涂铜绿(铜锈)、双色点蚀(先着黑色再点蚀铜绿)、套色、着土黄铜绿色等多种特殊的着色工艺.     

Comments on “The effect of ZnO in methanol synthesis catalysts on Cu dispersion and the specific activity” [by T. Fujitani and J. Nakamura]

Fujitani and Nakamura recently reported on the effect of ZnO on Cu/ZnO methanol synthesis catalysts (Catal. Lett. 56 (1998) 119). Having measured the methanol synthesis activity of a series of Cu/ZnO catalysts of different Cu/ZnO ratios, they reported a linear relationship between the copper metal area and the methanol yield (implying a fixed value of the copper specific activity) and paradoxically they also reported a volcano-type relationship between the copper specific activity in methanol synthesis and the ZnO content. This paradox is resolved by showing that their Cu/ZnO catalysts fall into two groups: (i) the low-surface-area copper catalysts which have a specific activity of 10 mg CH₃OH/m²-Cu h and (ii) the high-surface-area copper catalysts which have specific activity of 14.8 mg CH₃OH/m²-Cu h. These different specific activities derive from different surface morphologies of the copper in these catalysts. This revised version was published online in November 2006 with corrections to the Cover Date.     

液相空气氧化法制取硫酸铜工艺的研究

对液相空气氧化法制取硫酸铜的生产条件进行了研究。在实验基础上，提出了中酸度高温空气氧化法生产硫酸铜的新工艺。     

某铜矿选矿实验研究

为了开发某铜矿资源,对其进行了可行性实验研究.根据矿石物相分析结果,采用硫化铜与氧化铜混合浮选工艺,并选用新型高效浮选药剂,可获得铜精品位20.29%,收率70.68%的铜精矿.