Current situation and future trend of the hottest

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Current situation and future trend of automobile anti-corrosion coating market at present, the domestic automobile protection design, application and process level of anti-corrosion technology are relatively low. The fullness, flatness, gloss and adhesion of some domestic automotive paint layers are low, and the quality of coating and conversion film is poor, especially the corrosion resistance of parts in heavy corrosive environment (acid mist, high temperature, etc.). It is directly manifested in rust stains, blistering, peeling, discoloration, loss of gloss of the paint layer, reduced cleanliness of the oil tank, deformation of non-metallic parts, etc. after a period of use

to improve the anti-corrosion performance of automobile, comprehensive measures should be taken from the aspects of structural design, use and maintenance of manufacturing process to achieve the best effect

most automobile parts and components are made of metal materials, but metal materials generally have corrosion problems. When metal parts and components move in corrosive gas or liquid environment, chemical corrosion or electrochemical corrosion occurs on the friction surface, forming a corrosion layer. If they continue to rub, they will peel off and cause parts damage. The corrosion of vehicle metal parts and components will not only reduce their quality and service life, Moreover, the parts damaged due to their corrosion are very easy to cause traffic accidents, and even cause the tragedy of vehicle destruction and human death

with the increase of the service life and driving mileage of the vehicle, various metal parts will be severely corroded, such as the cab, trunk, shell, bottom plate, fender, front fender, face shield, etc. These parts are often in contact with sediment, crushed stone and water. For example, when the wheel splashes crushed stone and sediment impact the protective layer on the vehicle surface, it is very easy to scratch the paint layer, damage its integrity and continuity, and expose the metal. When it comes to contact with oxygen in water and air, it will play a chemical role and produce corrosion

application of anti-corrosion coating:

coating is a mixture solution or powder of organic polymer colloid with or without pigment. The space of the horizontal tensile testing machine for coating is beyond that of the vertical tensile testing machine. Coating on the surface of the object can form a relatively solid film, which plays the role of waterproof, corrosion prevention, protection, decoration, etc. this coating, which is commonly referred to as "paint", has unique function and performance

the coating forms a thin film after drying on the surface of the object. This kind of coating film covering the surface of the object has strong adhesion, plays a role in isolating the erosion of moisture, smoke and foreign corrosive substances, and protects the surface of the object by enhancing the sealing

coating anticorrosion plays an important role in economic construction and people's life. In real life, many iron and steel products are exposed to corrosive environments, such as bridges, vehicles, various mechanical equipment, etc., which have been exposed to wind and rain for a long time, acid, alkali, salt and microbial corrosion, resulting in the decline of the mechanical performance of the equipment, the reduction of the use value, and even the early scrapping

in order to achieve the expected good effect, the first thing is the selection of materials, and the second is the specific construction technology. In order to make the paint layer have a good anti-corrosion effect on the metal surface, the global paint believes that the paint layer must have a very strong adhesion with the metal surface. To be more specific, it has the following conditions: there is van der Waals intermolecular attraction; Provide a surface with even and slightly rough inlaid paint molecules, and the organic or inorganic materials in the paint layer shall contain charged polar functional groups

in recent years, the technology to achieve the purpose of corrosion prevention through the adsorption of polar molecules of organic and inorganic substances on the metal surface has been gradually applied all over the world. The results of physical and chemical adsorption of these molecules with polar groups on the metal surface, on the one hand, can change the metal surface state and interface properties, and increase the activation energy of metal corrosion reaction; On the other hand, it also changes the electrode potential of metal corrosion, so as to avoid or reduce the electrochemical corrosion

the main component of the composite ceramic high-temperature anti-corrosion coating is yttrium rare earth high-purity micro powder and composite under the action of Chu Yong experimental force (FO) and total experimental force (f) α— Ceramic powder and silicon carbide are finely processed under closed high temperature. Zs-822 coating has high temperature resistance. It forms a dense ceramic glaze under high temperature. Its hardness can reach 7h. The coating is smooth, self-cleaning, impact resistant, long-term acid and alkali corrosion resistance, strong adhesion, water and oil resistance, and can also withstand the corrosion immersion of organic solvents. In terms of corrosion protection, it is the best and strongest anti-corrosion coating in the world

polyurethane anticorrosive paint has a variety of varieties and can be used for a variety of purposes. Two component, room temperature curing hydroxyl polyurethane coating is the main variety of polyurethane anticorrosive paint. It has outstanding weather resistance and oil resistance. Epoxy coal tar pitch anticorrosive paint is composed of epoxy resin, coal tar pitch, antirust pigment, additives and modified amine

due to the volatility and reactivity of isocyanate based (- NCO) components in the coating, full attention should be paid to the processing, transportation, storage and construction of the coating. The composition of polyurethane anticorrosive paint polyurethane refers to the polymer with urethane bond in its molecular structure. The carbamate bond is formed by the reaction of isocyanate group and hydroxyl group. It is known to the world that the monomer of polyurethane resin is polyisocyanate and polyhydroxy compound. Polyisocyanates have aromatic and aliphatic groups. Because the former is relatively cheap and has high reaction activity at room temperature, the former is mostly used in the anticorrosive paint and the latter is rarely used. The latter is only used in the top coat of outdoor coating with decorative properties that need to be obtained on the basis of this successful research. In order to improve the storage, construction and coating film performance, polyisocyanate monomers are often made into polyurethane prepolymers or adducts containing free isocyanate groups

future of anticorrosive coating industry:

anticorrosive coating has become an important new force in the coating field. Anticorrosive coating is playing an increasingly important role and has a promising future. However, traditional products have been gradually improved and new products have been continuously researched and developed. In order to adapt to the new standards and requirements in the development of anti-corrosion market and environmental protection laws and regulations, we still need to be proactive and innovative

experts in the industry generally believe that the price of anti-corrosion coatings is obviously rising, which has something to do with ship coatings and marine development. In recent years, the state has been increasing investment in seven tenths of the earth's oceans, of which anti-corrosion coating is a prominent point. At present, the scientific research on anti-corrosion coatings is in full swing. Human beings have been constantly studying the ocean. The resources in the ocean and the exploration of the ocean are also slowly advancing. The progress in the ocean can not be separated from the surface coating. China still has a long way to go for anti-corrosion coatings

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