阴极电泳涂装工艺的应用及发展

详细介绍了现代汽车电泳漆的应用现状,电泳涂装技术的工艺参数、在涂装行业中的应用以及国内外阴极电泳涂装的发展状况.并展望了阴极电泳漆的发展方向.     

谈现代汽车的电泳涂装

根据电泳漆对颜料的要求，本文详细介绍了现代汽车阴极电泳漆的应用现状，电泳涂装的特点、工艺参数、功用原理及其工艺技巧；并提出了车身电泳漆膜现场常用的质量检测方法。     

阴极聚氨酯电泳漆涂装工艺的探讨

探讨了电泳涂装的温度、电压、时间、极板间距和树脂的中和程度对阴极聚氨酯电泳漆涂装工艺的影响,优化了阳离子聚氨酯电泳漆的涂装工艺参数。实验结果表明,当电压为40V、温度为30℃、电泳时间为60s、中和程度为100％以及极板间距为150mm时,漆膜的性能较为理想。     

日中即将联合提出铝阳极氧化复合膜国际标准提案

铝合金阳极氧化电泳涂装复合膜已经被我国建筑业市场所认可，电泳涂装已经由单一的光亮透明的电泳漆发展到目前的消光电泳漆和有色电泳漆。     

中小型企业阴极电泳工艺的合理设计和管理

随着我国改革开放,汽车、自行车、五金零件等工业迅猛发展,阴极电泳漆涂装工艺已获得大力推广和应用。本文针对当前中小型企业中,电泳工艺及设计和电泳漆槽管理存在的问题,提出了一系列合理化建议,在电泳工艺设计中,着重提出了电泳槽设计的规范化;双循环装置替代单循环装置的优越性;阴极罩循环一定程度上替代超滤循环的可行性;同时讨论了超滤器应用于浸洗液处理。在电泳涂装中讨论了前处理、电泳涂漆、冲洗及烘干等方面的问题。并根据多年来的工作经验,在电泳漆槽管理中对漆液固体含量、pH值、温度等工艺参数的控制做了具体分析,并提供了可靠的数据。 本文对中小型企业阴极电泳漆涂装、工艺设计及槽液管理具有一定的参考价值。     

电泳循环管路设计中的注意事项

阴极电泳在现在高档家电涂装和汽车涂装中是比较常见的工艺。电泳循环管路的合理设计和安装对于电泳漆循环相当重要，如有不当，将会带来电泳漆的沉淀和管路堵塞，给维护和管路带来不必要的麻烦。现结合近几年的电泳设计和安装，对循环管路系统中出现的一些问题进行分析。     

怎样改进国内阳极电泳生产线

怎样改进国内阳极电泳生产线张蔼吉（上海涂装技术协作网络）我国在汽车、电气和自行车等行业的涂装工艺中，从７０年代初就开始逐步采用了阳极电泳漆作为底漆。这不仅保证了产品质量，并大大地提高了生产率和自动化程度，改善了生产环境。时代在前进，科技在发展，电泳的...     

谈汽车的现代电泳涂装工艺

详细介绍了现代汽车电泳漆的应用现状,电泳涂装的特点、工艺参数、功用原理及其工艺技巧,并提出了车身电泳漆膜现场常规的质量检测项目。     

阴极电泳涂装工艺发展概况

电泳涂装技术自研制成功以来不断更新改进,现已广泛应用于工业涂装各领域。本文对电泳涂装的发展概况做了简要介绍,着重对阴极电泳漆的特点和发展、电泳涂装工艺过程、电泳涂装设备的各部件工作原理等做了详细讲解。     

黑色电泳漆操作规范

本文是电泳漆的使用说明,它全面介绍了阴极电泳涂装工艺、设备的设计、生产管理、质量控制等。同时,文章详细阐述了电泳涂装与电泳涂膜的各项检测指标和检测规范。     

Influence of surface pretreatment and electrocoating parameters on the adhesion of cathodic electrocoat to the Al alloy surfaces

Adhesion of cathodic electrocoat films to the aluminum alloys 2024-T3 bare and Alclad 2024-T3 with different pretreatments and with different cathodic electrocoat process parameters was investigated. The pretreatments studied were acetone wipe and alkaline cleaning. The cathodic electrocoat process parameters studied include variation of cathodic electrocoating voltage and time. Adhesion performance was evaluated by measuring the delamination time and percent delamination of the electrocoat from the alloy surface by placing the small specimen of the sample in the N-methyl pyrrolidinone (NMP) solution at 60°C until the film lifts off or for 2 h whichever comes first. NMP times for electrodeposited film delamination from alkaline cleaned surfaces were found to be higher than the acetone wiped and or those of as-supplied metal surfaces. There was not much effect of acetone cleaning of these alloy surfaces on the adhesion performance of the cathodic electrocoat. The voltage–current (of cathodic electrocoating process) relationships for alkaline cleaned surfaces were also found to be significantly different from the other two types of surfaces. The NMP times of cathodic electrocoat delamination at lower cathodic electrocoating voltage and lower electrocoating times were higher than those at higher cathodic electrocoating voltage and electrocoating times for alkaline cleaned 2024 bare surfaces. Electrocoat thickness developed on the surfaces during the electrodeposition process increased with increasing electrodeposition voltage and time as anticipated.     

电泳漆专用色浆的研制

本文主要研究与电泳漆配套使用的色浆的制备.文章介绍了电泳漆色浆的组成,分析不同因素在色浆制备过程中的影响.其次,针对电泳漆色浆的特性进行研究,以分散树脂为切人点,探讨颜料吸油量、添加不同的助剂等因素对色浆制备以及贮存稳定性的影响.最后,并根据色浆的制备过程中所出现的问题以及市场反馈的信息,对色浆配方进行调整与完善.     

纯水在电泳涂装中的应用和离子交换制取法

阴极电泳涂装中的杂质离子和污物不仅会干扰和破坏电泳槽液的稳定，而且严重地影响电泳漆膜的内在、外在质量，必须对其给以清除或者严加控制。本文介绍了纯水在处理杂质离子和污物过程中的作用以及采用离子交换制取法制作纯水的生产工艺。     

NAVECO车架电泳漆改型混槽试验与生产应用

从电泳漆的树脂结构离ＮＡＶＥＣＯ车架电泳漆改型混槽可行性，详细叙述了混槽试验方法，混槽最佳施工参数，以及混槽生产应用过程，通过对原材料价格，单位面积的漆耗量及能源各方面的分析，认为其改型换槽是经济的，切实可行的。     

猎豹轻型越野车车身电泳涂装工艺

湖南长丰猎豹轻型越野车车身阴极电泳涂装生产线是引进、消化、吸收德国杜尔涂装公司先进技术设计、制造的具有国内先进水平的涂装生产线。本文介绍了该阴极电泳涂装生产线的工艺流程、工艺参数及质量控制。     

Influence of crosslinking density of a cataphoretic coating on initiation and propagation of filiform corrosion of AA6016

The effect of curing temperature on initiation and propagation of filiform corrosion of an epoxy cataphoretic electrocoating deposited on aluminum alloy substrate was studied. EIS measurements were used to follow the evolution of the water uptake of the intact coatings. In addition, EIS was applied to determine the performances of the systems as a result of exposure to HCl vapours.     

Anolyte cells of electrocoating paint. I: Anodes,impurities and dissolution

The occasionally occurring sudden destruction of the used stainless steel anodes during the electrocoating process and the regular consumption of their thickness are due respectively to local and non-local anodic dissolutions. The aim of this paper is to identify the operating conditions that protect the anode from the sudden destruction of local dissolution, and also to assess the non-local dissolution rate in order to predict the mean life of these anodes. Both types of dissolution are known in the field of corrosion, but this field concerns passivation and trans-passivation potential and not higher range, i.e. oxygen evolution reaction potential. Specific tests are performed with stainless steels that contain different concentrations of molybdenum and typical weak acids of anolyte solution that normally also contain traces of chloride, sulphate phosphate and nitrate as impurities. The results of these tests show that the anodes operate in non-safeguard conditions with respect local dissolution when: (i) traces of nitrates are absent from the anolyte solution and (ii) low molybdenum concentration stainless steels are used as anodes. When the safeguard conditions are ensured, the rate of non-local dissolution is easily detected and the results obtained show that its value increases with (i) the increase in molybdenum in the stainless steel, (ii) the decrease the pH value of the anolyte solution (iii) the increase in the temperature and (iv) the decrease in anolyte recycling in the cell. The results obtained show that sudden destruction and the mean life of anodes are the result of added chemicals in the paint bath and from the pre-treatments adopted. In other words, the interactions between pre-treatments, electrocoating and accessories (anodes), is required when the optimization of the electrocoating process is proposed.     

Ressourceneffiziente Nutzung von Wasser in Anlagen zur Serienlackierung von Automobilkarosserien

Cleaning, conversion coating, and electrocoating are typical wet‐chemical process units in high‐volume painting plants for car bodies. These surface treatment processes must meet ever higher demands in terms of quality, cost savings, and environmental compatibility. Besides the efficient use of energy, the conservation of water resources plays a key role, for which both the integration of existing and the development of new technologies for process bath care are essential core elements. This article discusses the use of various state‐of‐the‐art technologies.     

Synthesis and characterization of an anticratering agent based on APTES for cathodic electrocoatings

The present study developed an improved aqueous electrocoating containing an anticratering additive that is a reaction product of silane based on amino-propyl-triethoxy-silane and diglycidyl ether of bisphenol A. Structural characterization was performed using Fourier Transform Infrared Spectroscopy (FTIR), epoxy equivalent weight measurement, particle size analysis and SEM. Number of craters on the electrocoated sample was evaluated according to GM9532p. The final electrocoats containing the new anticratering agent showed far fewer craters.     

锌钙系磷化的最新应用研究

研究了3种新的锌钙系磷化工艺和配方，中温高耐蚀黑色磷化，磷化膜细致，耐蚀性优异，可用于钢铁的防锈磷化；钙改良的低温低锌磷化，钙的加入有利于镀锌板，铝板，钢板的复合件的磷化，可用于电泳涂装，中温耐热锌钙系磷化可用于需高温烘烤涂料涂装前的磷化处理，锌钙系磷化是磷化技术发展的一个方向。