I. Classification of Internal Steel Coating
The internal steel coatings are mainly classified into the following categories based on their composition and functions:
Organic coating: This type of coating mainly consists of synthetic resins, pigments and solvents. And it forms a dense protective layer on the surface of steel through chemical reactions. Organic coatings have excellent anti-corrosion performance and decorative effects, and are widely used in various steel structures.
Inorganic coating: Inorganic coating mainly consists of passivators and rust inhibitors as the main components, forming a passivation film on the surface of steel through physical or chemical methods. This coating can effectively isolate air and moisture, prevent steel from undergoing oxidation reactions, and thus extend its service life.
Metal coating: Metal coating is made by pressing metal powder or metals such as aluminum and zinc into a film and covering it on the surface of steel. This type of coating not only has excellent anti-corrosion performance, but also can further protect steel from corrosion through cathodic protection.
2. The function of the internal steel coating
The functions of the internal steel coating are mainly reflected in the following aspects:
Anti-corrosion effect: The coating can prevent direct contact between corrosive media such as air and moisture and steel, thereby slowing down or preventing the corrosion process of steel. This is of great significance for prolonging the service life of steel and improving the structural safety.
Wear resistance: Some special coating materials, such as wear-resistant alloys and ceramics, can significantly enhance the wear resistance of steel. This is particularly important for steel structure components that are subject to mechanical wear.
Special functions: In addition to anti-corrosion and wear resistance, the internal coating of steel can also possess other special functions. Such as fire resistance, heat insulation, and electrical conductivity. These functions can be customized according to specific needs to meet the requirements of different application scenarios.
3. The operation process of the internal steel coating
Surface treatment: Before applying the coating, the surface of the steel needs to be thoroughly cleaned and treated. This includes removing impurities such as oil stains, rust, and old coatings, as well as conducting necessary roughening treatments to enhance the adhesion between the coating and the steel.
Primer application: The primer is the first layer in the coating system. And its main functions are to prevent rust, enhance adhesion and smooth the surface. The selection of primer should be determined based on the material of the steel, the usage environment and the requirements of the coating system.
Intermediate coat application (if necessary) : As the intermediate layer of the coating system, the main function of the intermediate coat is to increase the thickness and hardness of the coating, and improve the overall anti-corrosion performance and durability. In some cases, intermediate varnish can also play a role in blocking corrosive media.
Topcoat application: The topcoat is the last layer in the coating system, and its main function is to beautify the appearance, enhance weather resistance and UV resistance. The selection of topcoat should take into account the decorative effect, weather resistance and the special requirements of the usage environment.
Quality inspection and acceptance: After the coating construction is completed, IBC Group will conduct quality inspection and acceptance work. This includes checking whether the thickness, adhesion, appearance quality and other aspects of the coating meet the design requirements and relevant standards.
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