静电喷涂的油漆工艺

静电喷涂彩板 涂装工艺及设备简介1。涂装的目的首先是为了保护和延长工件的使用寿命，然后是为了装饰和达到美观宜人的目的。三是达到特殊目的，达到特殊表现。如：隔音、隔热、防火等。根据涂料的不同用途和要求，将涂料分为底漆、腻子、面漆等几层。底漆：与被漆工件本体直接接触的最低涂层。底漆的作用是增强涂层与车身的附着力，提高涂层的防护性能。黑色金属在去除前应进行磷化处理，在应用前应对有色金属进行氧化处理。腻子层：对于粗糙不平的物体，使用腻子层有许多缺点，如施工困难、降低涂层与物体的结合力等，面漆的主要目的是增加产品的光泽，用于涂层的最外层。2。涂层方法有多种，包括涂层法、浸渍涂层法、空气喷涂法、高压无气喷涂法、静电喷涂法和电泳涂层法。

静电喷涂彩板在涂料施工中，由于单层涂料的不均匀性和孔隙率，很少用于涂料装配和产品材料要求。经常使用底漆和面漆。中间层和饰面可根据需要添加。底漆层应与待涂工件具有良好的附着力，对向漆层应具有良好的附着力和防锈性。底漆与面漆的配合原则为：1）干底漆与面漆配合良好；自干底漆与面漆配合良好；底漆与面漆配合良好。2）选择强溶剂型面漆时，如硝化纤维漆、过氯乙烯漆等，底漆层必须能抵抗强溶剂而不被咬，如醇酸漆、环氧漆等；3）底漆和面漆应具有相似的硬度和延伸率。4）与固化底漆配套时耐热性差。5）底漆的油度比面漆的油度短，否则，面漆耐候性差，底漆和面漆的干燥收缩率不同，容易引起各层开裂。6）采用多层异种涂料时，经常采用中间层使漆基过渡，实现底层与表层的良好结合。

静电喷涂彩板有机涂层的附着力与产品材料的性能有关。根据附着力的不同，金属的顺序为：镍→钢→铜→黄铜→铝→锡→铅铁金属几乎适用于所有类型的底漆，而镁铝零件及其合金通常是以铬酸锌为主体的钝化底漆。有效地对工件表面进行预处理，形成一层磷化膜或氧化膜，以改善基材与底漆之间的粘合性。然后选择附着力强的底漆。铝件和镀锌件不得使用红丹底漆，否则会引起电化学效应，降低附着力。

Brief introduction of coating process and equipment 1. The purpose of painting is first to protect and extend the service life of the workpiece, then to decorate and achieve the purpose of beautiful and pleasant. Third, it is to achieve a special purpose, to achieve special performance. Such as: sound insulation, heat insulation, fire protection, etc. According to different uses and requirements of the coating, the coating is divided into primer, putty, finishing coat and other layers. Primer: it is the lowest coating in direct contact with the painted workpiece body. The function of the primer is to enhance the adhesion between the coating and the body and enhance the protective performance of the coating. Ferrous metals shall be phosphated before removal and non-ferrous metals shall be oxidized before application. Putty layer: for rough and uneven objects, there are many disadvantages in using putty layer, such as trouble in construction, reducing the binding force between coating and objects, etc. the main purpose of finishing coat is to increase the luster of products, which is used for the outermost layer of coating. 2. There are many coating methods, including coating method, dip coating method, air spraying method, high pressure airless spraying method, electrostatic spraying method and electrophoresis coating method. Three. In coating construction, due to the heterogeneity and porosity of single coating, it is rarely used for coating assembly and product material requirements. Primer and finish coats are often used. Intermediate layer and finish can be added as required. The primer layer shall have good adhesion with the workpiece to be coated, and the opposite paint layer shall have good adhesion and rust resistance. The matching principle of primer and top coat is: 1) the dry primer and top coat are well matched; the self dry primer and top coat are well matched; the primer and top coat are well matched. 2) when selecting strong solvent finish, such as nitrocellulose paint, perchloroethylene paint, etc., the primer layer must be able to resist strong solvent without being bitten, such as alkyd paint, epoxy paint, etc. 3) the primer and finish shall have similar hardness and elongation. 4) poor heat resistance when matched with curing primer. 5) the oil degree of primer is shorter than that of topcoat, otherwise, the weather resistance of topcoat is poor, and the drying shrinkage rate of primer and topcoat is different, which is easy to cause cracking of each layer. 6) when multi-layer heterogeneous coating is used, the intermediate layer is often used to make the paint base transition, so as to realize a good combination of the bottom layer and the surface layer. The adhesion of organic coating is related to the properties of product materials. According to the different adhesion, the sequence of metals is as follows: nickel → steel → copper → brass → aluminum → tin → lead iron metals are suitable for almost all types of primers, while magnesium aluminum parts and their alloys are usually passivated primers with zinc chromate as the main body. The surface of the workpiece is effectively pretreated to form a layer of phosphating film or oxide film to improve the adhesion between the substrate and the primer. Then choose the primer with strong adhesion. Red lead primer shall not be used for aluminum and galvanized parts, otherwise it will cause electrochemical effect and reduce adhesion.