In recent years, anti-corrosion coatings have played an increasingly important role in the national economic construction. The anti-corrosion coating market has shown a gratifying situation, and its production scale has been continuously expanding. According to "China's anti-corrosion coatings industry market demand forecast and investment strategic planning analysis The "Reporting Prospects" shows that as early as 2010, China's anti-corrosion coating application volume has exceeded 3 million tons, making it the world's first country for production and use of anti-corrosion coatings.
What is anti-corrosion coating?
Anti-corrosion coating is a kind of coating that plays a role in anti-corrosion of metal, etc. It has many unmatched features of other coatings.
First of all, anti-corrosion coatings can be used under harsh conditions and have long-lasting anti-corrosion life. Heavy anti-corrosion coatings can generally be used in chemical atmospheres and marine environments for 10 years or more, even in acid, alkali, salt and solvent media. , Under certain temperature conditions, can also be used for more than 5 years.
Secondly, thick film is an important symbol of heavy-duty coatings. The general coating thickness of anti-corrosion coatings is about 100 μm or 150 μm, while the dry film thickness of heavy anti-corrosion coatings is 200 μm or more, and 500 μm to 1000 μm. The layer has excellent weatherability, anti-aging, anti-radiation, abrasion resistance, impact resistance, high temperature (400 °C -600 °C), low temperature (-60 °C), stable electrical conductivity; its resistivity can meet the anti-static requirements, Can guarantee the long life of the coating.
Thirdly, the anti-corrosion coating has strong adhesion. The coating has strong binding force with the substrate. The coating composition contains hydroxyl (-OH). The metal matrix provides positive ions, which can form chemical bonds. With the help of the coupling agent in the coating, it can even be realized. Covalent chain bonding. Under the spatial network structure, the metal contained in the coating composition, the metal oxide nanomaterial and the ultrafine powder of rare earth oxides, help the coating form a dense interfacial transition layer to synthesize it. Thermodynamic properties match the matrix.
Finally, the anti-corrosion coating is efficient and convenient to use. The construction is simple, and the self-cure of the inorganic coating is truly realized at room temperature. When the ambient temperature is 20° C. and the relative humidity is less than 85%, the surface is dried for 15 minutes and dried for 2 hours to ensure high-efficiency construction and excellent performance can be achieved. The resistance to salt spray, aging resistance. The coating has self-repair, local scratches caused by external forces can still be protected, the coating is not damaged by cutting and welding, and the coated welding does not affect the welding quality.
What is the use of anticorrosive coatings?
Anticorrosive coatings play a role in more and more fields because of their superior performance.
First, anti-corrosion coating can neutralize harmful acid-alkali substances into neutral harmless substances to protect the materials in anti-corrosion coating from corrosive substances. Anti-rust coating is often added with some amphoteric compounds, such as hydroxide. Aluminum, barium hydroxide, zinc oxide, etc. These substances can easily react with acid and alkali harmful substances to achieve anti-corrosion effect.
Second, the anti-corrosion coating separates the protected material from the corrosive substances in the outside world. The physical principle of the anti-rust coating is to use a film former to obtain a dense anti-corrosion coating to isolate the anti-corrosion effect on the protected material, such as lead. After the reaction of paint and oil, lead soap can be formed to ensure the tightness of the anti-corrosion coating.
Third, add some special substances in the anti-rust paint, so that when moisture and oxygen pass through the anti-rust paint, they will react to form anti-corrosion ions, passivate the surface of metal such as iron and steel, and thus prevent the dissolution of metal ions to achieve anti-corrosion The purpose, the most common of this particular substance is chromate.
The application fields of anti-corrosion coatings mainly include the following five aspects:
1 emerging marine projects: offshore facilities, coastal and bay structures, offshore oil drilling platforms;
2 Modern transportation: Highway barriers, bridges, boats, containers, trains and railway facilities, automobiles, airport facilities;
3 Energy industry: hydraulic equipment, water tanks, gas tanks, petroleum refining equipment, oil storage equipment (oil pipes, oil tanks), power transmission and transformation equipment, nuclear power, coal mines;
(4) Large-scale industrial enterprises: papermaking equipment, medical equipment, food and chemical equipment, internal and external walls of metal containers, chemical industry, iron and steel, pipes of petrochemical plants, storage tanks, mine smelting, cement plant equipment, grounds with corrosive media, walls, cement components;
5 municipal facilities: gas pipelines and their facilities (such as gas tanks), natural gas pipelines, drinking water facilities, garbage disposal equipment, etc.;
6Others: Various non-stick coatings.
About Zhengzhou Qingteng Coatings
With the opening of the paint market in China, domestic paint companies have rapidly emerged, and a number of domestic first-line domestic brands have emerged. Zhengzhou Qingteng Paint Co., Ltd. is a professional paint manufacturer. The company has advanced domestic production equipment and a large number of Professional technicians, from paint production, to quality inspection, to delivery, all strive for excellence. The company has always believed that a good word of mouth is a good advertisement, wins the market with service and price, and makes progress with quality and technology.
The company's main products are: Perchlorethylene (perchloroethylene anticorrosion paint), Nitro (nitro primer, Nitro varnish), Amino (amino drying enamel), Alkyd (Alkyd enamel, Alkyd Antirust paint), fireproof (steel structure fireproof coating), chlorinated rubber type (chlorinated rubber anticorrosive paint), high chlorinated type (high chlorinated polyethylene paint), chlorosulfonated type (chlorosulfonated polyethylene paint ), Silicones (silicone resistant to high temperature paint), Polyurethanes (urethane varnish, Polyurethane lacquer, Polyurethane floor paint), Acrylics (acrylic road marking paints, Acrylic mechanical paints, Acrylic enamels, Acrylic polyurethane paints), Epoxy compounds include: epoxy zinc-rich primer, epoxy floor paint, epoxy cloud iron anti-rust paint, epoxy cloud iron intermediate paint, epoxy self-leveling paint, epoxy rust rust prevention antirust paint, no Poison epoxy anti-corrosion paint, Epoxy glass flake heavy anti-corrosion paint/heavy anti-corrosion paint, Epoxy zinc phosphate anti-corrosion paint, Epoxy polyester primer, Epoxy furan resin anti-corrosion paint, Epoxy primer, Epoxy antistatic anti-corrosion paint , Epoxy resin varnish, Epoxy red anticorrosive paint, Epoxy coal tar lacquer) and Industrial special anticorrosive paint (Aviation mark paint, Cyanide Waterproof anti-corrosion coating, polycondensation anti-corrosion paint, drinking water pipeline anti-corrosion paint, silver paint, phenolic chimney paint, steel fluorocarbon paint, inorganic zinc-rich primer, IPN8710 interpenetrating network heavy anti-corrosion paint, ).
The company's products are widely used in bridge towers, petrochemicals, municipal engineering, mechanical equipment, mechanical and electrical equipment, power plant steel plants, construction vehicles, construction machinery, auto parts, ship ports, hydropower stations, port machinery, hydraulic gates, mines, gas cabinets, Oil storage tanks, buried pipelines, etc. Steel structure corrosion protection high performance coating protection.
summary:
Anti-corrosion coatings have become an important force in the coatings field, playing a bigger and bigger role, and the prospects for development are considerable. However, traditional products have been gradually improved, new products have been continuously developed, and they are adapting to the anti-corrosion market and the development of environmental protection laws and regulations. Standards and requirements, enterprises still need to be aggressive, continuous innovation.