A kind of anti-corrosion coating for high temperature condensate recovery device

Abstract

The invention provides a preparation method of an anticorrosion coating for a high-temperature condensate recovery device. The modified epoxy silicone resin is prepared by adding various pigments, fillers and additives at room temperature, and mixing it with a curing agent after fully stirring. It can be applied to hot water delivery pipes, and the inner wall of heat exchanger pipes is anti-corrosion. After the coating is tested periodically in condensed water at about 120°C, it shows good physical and mechanical properties and chemical corrosion resistance. The coating of the present invention comprises A and B components, and A component is made up of epoxy modified silicone resin, micaceous iron oxide ash, mica, talcum powder, zirconium dioxide, dispersant, defoamer, and B component is solidified In terms of coating mass percentage: epoxy modified silicone resin 30% to 50%, mica iron oxide ash 20% to 30%, mica 5% to 15%, talcum powder 2% to 8%, zirconium dioxide 5% to 10%, defoamer 0.1% to 0.4%, dispersant 0.2% to 0.5%, curing agent 3% to 10%.

Description

Technical field: [0001] The invention relates to an anti-corrosion coating for a high-temperature condensate recovery device, in particular to an anti-corrosion coating containing modified epoxy silicone resin, which can be widely used in condensate recovery devices, heat exchanger tubes and inner wall coatings of hot water delivery pipes. Apply anti-corrosion. Background technique: [0002] Condensed water has a lot of heat, which can reach 20% to 30% of the total heat of steam, and the higher the pressure and temperature, the more heat the condensed water has, and the greater the proportion of the total heat of steam. If 1 ton of condensed water is recovered per hour, it is equivalent to saving 30 tons of standard coal a year. If calculated at 650 yuan per ton of standard coal, it can save 19,500 yuan. In addition, the quality of the condensed water is good, no softening is required, and the cost of softening water treatment and supplementary water can also be saved. At ...

AI Technical Summary

Problems solved by technology

Patent CN200310101611[1].7 After cleaning and drying the metal surface of the condensed water recovery system, it is activated in the activation solution added with an activator, and then soaked in the water glass film-forming solution to form a film, and then dried to obtain a metal The first layer of SiO on the surface 2 Thin film, repeat the above-mentioned film-forming process of activation, immersion and drying on the metal surface, so that the metal surface of the condensed water system forms a multi-layer SiO 2 Protective film, so as to prevent the corrosion of the metal surface of the condensate water system, it has been proved to have good hot water corrosion resistance, but the film forming process is complicated

It can be seen that the anti-corrosion coatings currently used for high-temperature hot water have many problems such as high-temperature curing, complicated process, inconvenient construction, and high cost.

There is still a lack of coatings that can withstand high-temperature condensate erosion, and it is necessary to study protective coatings for condensate recovery devices that are multi-variety, low-cost, and have large-scale practical value.

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