Application of Epoxy Topcoat in Industrial Anticorrosion

Epoxy topcoat belongs to the two-component epoxy resin topcoat variety, which has the special properties of wear resistance, impact resistance, excellent water resistance, salt spray resistance and heat resistance (continuous 150 ° C). It is suitable for indoor basements without sunlight Anticorrosive and decorative topcoat in the environment.

Used in conjunction with epoxy primer, the film is hard and wear-resistant, has a long life, and has outstanding performance in water resistance, oil resistance, and chemical resistance. However, due to temperature restrictions during construction, low temperature construction is not possible. As a two-component paint, it is troublesome to use. Epoxy topcoat has poor outdoor weather resistance, will powder and lose gloss, affect decoration, but has little effect on protection performance.

Many thick paste epoxy coatings have been used as topcoats that do not require a good decorative finish inside structural parts or indoor environments. Because these places will not be exposed to solar ultraviolet rays, there is no need to worry that the coating film will be powdered.

Epoxy topcoat is suitable for the protection of containers, industrial machinery and equipment, mechanical and electrical products, steel structures, chemical equipment, bridges, offshore platforms, ship hulls, concrete surface protection, coastal areas and wet and tropical equipment and other metal and non-metallic surfaces. Decorative topcoat.

The topcoat is the final coating of the painting, and it is the last layer applied in the decoration of the building wall. The overall effect after the decoration is reflected through this layer. Therefore, there are higher requirements for the materials used, not only to have good chroma and brightness, but also to have good pollution resistance, aging resistance, moisture resistance, mold resistance, and non-polluting environment, safe and non-toxic , No fire hazard, easy construction, fast drying of coating film, good light and color preservation, good permeability and so on. With decoration and protection functions, such as color, gloss, texture, etc., it also needs to be resistant to harsh environments.

The resin can form three water-dispersed forms through different water-based ways: ① water-soluble; ② micelle-dispersed type; ③ emulsion. Epoxy resin itself is a thermoplastic linear structure. After heating, the solid state turns into a liquid state, and the high viscosity turns into a low viscosity. Only when used in conjunction with a curing agent is it of practical value. Hardener). Therefore, the waterborne epoxy system should contain waterborne epoxy resin and waterborne epoxy curing agent. Similarly, they can form three water dispersion forms through different waterborne pathways. Therefore, the waterborne epoxy system has more choice combinations (theoretically has 9 kinds of morphological combinations), but also increases the difficulty of choice. At the same time, in the actual application process, by adding a large amount of pigments, fillers, etc., to improve the performance of the water-based epoxy system, it also masks the shortcomings and even serious defects of the water-based epoxy system, which will increase more uncertainties and complexity Sex. Abandon the complicated and simple, pay attention to the form of water-based epoxy resin and the form of water-based epoxy curing agent, at the same time, by controlling the essence of water-based epoxy resin and the evaluation of water-based epoxy resin to achieve a faster and better choice of water-based epoxy system Laying a foundation for a huge building.