Coating knowledge: how much do you know about electrophoretic coating of automobile

Core tip: electrophoretic paint, also known as electrophoretic paint, now many people use the name "electrophoretic paint" instead of "electrophoretic paint" With the emergence of defects in conventional spraying, electrophoresis has become more and more popular The development of electrophoretic paint has also promoted the development of electrophoretic coating, from anode electrophoretic paint to cathode electrophoretic paint, from single component electrophoretic paint to two-component electrophoretic paint, so that more and more products no longer use spraying technology but use electrophoresis At present, electrophoretic paint is almost used in automobile industry Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: electrophoretic paint, also known as electrophoretic paint, now there are many people who use the term "electrophoretic paint" instead of "electrophoretic paint" With the emergence of defects in conventional spraying, electrophoresis has become more and more popular The development of electrophoretic paint has also promoted the development of electrophoretic coating, from anode electrophoretic paint to cathode electrophoretic paint, from single component electrophoretic paint to two-component electrophoretic paint, so that more and more products no longer use spraying technology but use electrophoresis At present, the automobile industry almost uses electrophoretic paint as primer The advantage of electrophoretic paint is that it greatly improves the anticorrosion of the inner cavity of the workpiece At the same time, because of its relatively special film-forming method, it is also higher in corrosion resistance than ordinary paint At the same time, electrophoretic paint is also convenient for assembly line production and improves production efficiency In the 1980s, due to the unremitting development of many coating companies in the United States, Japan and Germany, the most representative cathodic electrophoretic coatings are thick film cathodic electrophoretic coatings, low temperature curing cathodic electrophoretic coatings and color cathodic electrophoretic coatings At the end of 1980s, there were three systems in the world: anticorrosive cationic electrophoretic coating started with PPG company in the United States; cationic electrophoretic primer for cars and trucks pioneered by Hoechst company in Germany; modified cationic electrophoretic coating represented by Shendong and Kansai coating companies in Japan Since the 1990s, European and American automobile factories have replaced the traditional organic solvent automobile coating with environmental protection automobile coating to meet the environmental protection standards By 2001, 7% and 43% of the cars in North America, 32.5% and 36% in Europe had been produced with water-based intermediate coat and base coat respectively Among them, Germany has basically achieved water-based, medium coating accounts for 80%, and base color paint accounts for 93% Recently, haze has been bothering everyone Every day, the sky is foggy Haze is not only a serious environmental impact, but also a great harm to human health Small particles will not be discharged when inhaled into human lungs, and will accumulate in the lungs, eventually causing lung cancer and other diseases Recently, SHANGPAI Environmental Technology Co., Ltd., affiliated to Inner Mongolia Tianyi group, has released a series of PM2.5 processing technologies with independent intellectual property rights and based on the research and development of dielectrophoresis amplification application technology Based on the polarization and enrichment of micro nano particles by dielectrophoresis, the particles in the exhaust gas are polarized by dielectrophoresis, and then captured and enriched by the electrode device and guided to the collector, so as to achieve the PM2.5 treatment purpose It is also applicable to the treatment of automobile exhaust gas, coal-fired boiler, metal smelting and other flue gas pollution Breach According to the R & D personnel, compared with the existing PM2.5 pollutant treatment technology, the technology can reduce the emission concentration of tail gas PM2.5 by more than 80% For example, the average value of tail gas at idle speed is reduced from 214 μ g / m3 to 41 μ g / m3, and the instantaneous value of PM2.5 is reduced from 1195 μ g / m3 to 213 μ g / m3 when the engine speed reaches 2500 rpm The engine exhaust resistance is reduced by 30%, and it is not afraid of lead pollution and high temperature At the same time, in terms of industrial dust removal technology, the removal rate of particles below PM5 can reach more than 93%, while in terms of energy consumption, it is only 40% of the existing treatment device Although electrophoretic paint is widely used in the automobile industry, there are also some details Here are some representative problems for your reference: 1 What electrophoretic paint technology is used for stamping parts of automobiles? A: cathodic electrophoresis is generally used Cathodic electrophoretic coating is to use the coating as cathode, and the electrophoretic coating used is cationic type (with positive charge) On the contrary, the anode electrophoretic coating method is to use the coating as the anode, and the electrophoretic coating used is cationic (with negative charge) 2 How to prevent the electrophoretic paint on the surface of automobile parts from falling off? Answer: when making auto parts, reduce the hardness of paint film properly The hardness is low and the toughness is relatively high, which is beneficial to the film falling off 3 Will the clamps be painted when the car body is electrophoresis? Answer: Car electrophoretic paint is to iron or galvanize iron wait for electrophoretic coating, other do not conduct electricity or stainless steel is electrophoretic do not go up 4 Why are there concave spots on the surface of the workpiece after cathodic electrophoretic coating? Answer: before degreasing, oil removal is not complete; oil molecules in electrophoretic paint 5、 What is the thickness of the film of the car electrophoretic paint? Answer: under normal conditions such as tank liquid parameters and construction parameters, it is no problem to make the electrophoretic paint film thickness above 35 One of the characteristics of electrophoretic coating is that the film thickness can be freely controlled by adjusting the parameters However, according to their own cost requirements, general automobile factories try to keep the minimum film thickness under the condition of ensuring the film performance Generally 18um-25um Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,