First, the price of cathodic electrophoretic paint
1, haystack? Acrylic anodic electrophoretic paint? colour
Company name: Zaoyang Hayes Dow Chemical Co., Ltd.
Starting price:? ￥ 16
2. electrophoretic paint? Cathode electrophoretic paint? vast
Company name: Suzhou Hao Han Environmental Protection Technology Co., Ltd.
Starting price:? ￥99
3. High-grade cathodic electrophoretic paint? Color electrophoretic paint wholesale
Company name: Suzhou Hao Han Environmental Protection Technology Co., Ltd.
Starting price:? ￥99
(The above information comes from the Internet for reference only)
2. What are the components of cathodic electrophoretic paint?
1, pigment:
Pigments used in cathodic electrophoretic paints can generally be divided into two types: bulk pigments and colored pigments. Among them, the physique pigment can be a common filler, and its function in electrophoretic paint is just like sand and gravel in concrete. Colored pigments include carbon black, titanium dioxide, etc., which generally exist in the color paste of two-component electrophoretic paint.
2. Solvent:
The solvents used in cathodic electrophoretic paints generally refer to organic solvents. For environmental protection and health, the pursuit of zero solvent is the development direction of coating industry, and users can also judge the advanced technology of electrophoretic paint according to the requirements of solvent quantity control index. The role of solvent in electrophoretic coating is mainly to maintain the stability of electrophoretic solution and the leveling of paint film, and its dosage is directly related to the formula design of various manufacturers. Its solvent is mainly used as an auxiliary material in the production of electrophoretic coatings.
3. Additives:
Additives can be said to be auxiliary chemicals, such as defoamers and neutralizers. Because it is used in industrial production, it can improve the production process or give the product some unique application performance. Generally speaking, additives can't form a film, but they are very important to the film-forming process and durability of the substrate.
4. Resin:
Electrophoretic paint resin is a water-soluble resin, which has the characteristics of safety, environmental protection, low odor, low viscosity, high solid content, good corrosion resistance and leveling. Its function in electrophoretic coating, like cement in concrete, plays a decisive role in coating performance. Procurement source of raw material resin for electrophoretic paint, quality control of production process, etc. , directly affect the final quality of paint! For electrophoretic paint users, electrophoretic paint resin is mainly embodied in the form of emulsion.
Three. Common problems and solutions of cathodic electrophoretic paint
1, particle
(1) phenomenon
After drying, there are rough and hard particles or tiny prickles on the surface of electrophoretic coating, and the horizontal plane of the coated object is often more serious than the vertical plane. This film is called a particle.
(2) reasons
① ① The PH value of ①①CED tank is on the high side, and alkaline substances are mixed, which leads to the instability of tank liquid and the precipitation or solidification of resin.
② There is a "dead angle" of precipitation and bare metal in the tank.
③ After electrophoresis, the cleaning solution is dirty, the paint content is too high, and the filterability is poor.
(4) Incoming coating surface and spreader are not clean, and poor washing after phosphating.
⑤ Particulate dirt falls off during drying.
⑥ The painting environment is messy.
⑦ The supplied paint or resin is poorly dissolved and has particles.
(3) Prevention and control methods
① Control the PH value of CED tank solution at the lower limit, prohibit bringing alkaline substances, strengthen filtration and accelerate the renewal of tank solution.
(2) Eliminate the "dead angle" that is easy to precipitate and the exposed metal part that produces the deposited coating.
③ Strengthen filtration, and it is recommended to use a filter element with an accuracy of 25μm to supply foam.
(4) Ensure that the painted surface is clean and free of phosphating deposits to prevent secondary pollution.
⑤ Clean the drying chamber and air filter.
⑥ Keep the painting environment clean, and check and eliminate the dust source in the air.
⑦ Ensure that the new paint dissolves well and the fineness of color paste is within the standard range.
2, shrinkage cavity (hole)
(1) phenomenon
It is invisible on the wet electrophoretic coating. After drying, crater-shaped pits appear on the surface of the coating, which are generally 0.5 ~ 3.0 mm in diameter. Those that do not expose the bottom are called pits, depressions and exposed holes, and those with particles in the middle are called "fisheye". The main reason for this disadvantage is that there is dust inside or on the surface of wet electrophoretic coating, and the particles insoluble in oil and electrophoretic coating become the center of pits, which makes the wet coating film flow unevenly in the initial stage of drying, resulting in coating defects.
(2) reasons
(1) Poor degreasing before painting or oil stain and dust falling on it after cleaning.
(2) The liquid in the tank is mixed with oil, floating on the liquid surface or emulsified in the liquid in the tank.
③ After electrophoresis, the washing liquid is mixed with oil.
④ The drying room is not clean, and the circulating air contains oil.
⑤ The pigment-base ratio of bath solution is unbalanced, and the low pigment content is easy to cause shrinkage cavity.
⑥ The painting environment is dirty, and the air may contain pollutants such as oil mist, paint mist and silica or wet coating.
⑦ The supplied coating has shrinkage cavity or the resin in it is poorly dissolved and neutralized.
(3) Prevention and control methods
(1) Strengthen the degreasing process of the coated object to ensure that the phosphating film is not polluted for the second time.
(2) Set a deoiling filter bag in the liquid circulation system of the oil tank, and find out the source of oil pollution at the same time. It is forbidden to bring oil pollution into the oil tank.
③ Improve the water quality after cleaning and strengthen filtration.
④ Keep the drying room and circulating hot air clean.
⑤ Adjust the pigment-base ratio of the bath solution, and add color paste appropriately to increase the pigment content.
⑥ Keep the painting environment clean and remove the sources of substances harmful to painting, especially those from silicone.
⑦ Strengthen the management of supply paint. Unqualified paint cannot be added into the tank, and ensure that the supply paint is dissolved, neutralized and filtered.
As a new material, electrophoretic paint on the market has the characteristics of low pollution, energy saving and resource saving, and various classifications including cathodic electrophoretic paint can also meet the needs and budgets of different consumers. It is composed of pigments, solvents, additives, resins and other components mentioned above, which comprehensively determine the performance of the product and are indispensable. In the process of consumer screening, we should also refer to this knowledge to carry out analysis.