Water-based epoxy anticorrosive paint for heat exchanger and preparation method of water-based epoxy anticorrosive paint

Abstract

The invention relates to the technical field of coatings, in particular to a water-based epoxy anticorrosive coating for a heat exchanger and a preparation method of the water-based epoxy anticorrosive coating. The water-based epoxy anticorrosive coating for the heat exchanger is mainly prepared from the following raw materials in parts by mass: 200 to 280 parts of water-based epoxy emulsion, 4 to 24 parts of water-based organic silicon emulsion, 16 to 40 parts of amino resin, 1.2 to 4 parts of catalyst, 130 to 220 parts of water-based pigment and filler slurry, 1.2 to 2.8 parts of defoaming agent, 0.4 to 2 parts of flatting agent, 1.2 to 2.8 parts of flash rust inhibitor and 0 to 12 parts of deionized water. The water-based epoxy anticorrosive coating for the heat exchanger, prepared by the invention, can obviously improve the tolerance to various chemical media in the use process, such as heat acid resistance, heat alkali resistance and the like, and meanwhile, meets the requirements of steam blowing resistance (1.0 MPa, 240 DEG C and 72 hours) of petrochemical engineering devices under extreme application conditions; the water-based epoxy anticorrosive paint for the heat exchanger belongs to a low-VOC environment-friendly product, and completely meets the environment-friendly requirement of the national compulsory standard GB 30981.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based epoxy anti-corrosion coating for heat exchangers and a preparation method thereof. Background technique [0002] A large number of heat exchangers are used in petrochemical production projects such as modern petroleum refining, chemical fertilizers, etc. However, as the quality of global crude oil becomes heavier, inferior, and high-sulfurized, the corrosion of heat exchangers will intensify on the one hand. Even material leakage occurs. On the other hand, a large amount of fouling will occur in the heat exchanger, which will affect the heat exchange efficiency and seriously affect the normal production of the enterprise. [0003] Installing an organic coating on the surface of the heat exchanger is the most effective and convenient corrosion protection measure for the heat exchanger. At present, most anti-corrosion coatings for heat exchangers use solvent-based ep...

AI Technical Summary

Problems solved by technology

However, with the promulgation of relevant domestic environmental protection laws and regulations, the VOCs emission requirements for coatings and coatings are becoming increasingly tight. The solvent-based heat exchanger anti-corrosion coatings synthesized by the existing technology have been difficult to meet the environmental protection requirements of the national mandatory standard GB 30981, and Poor anti-corrosion, anti-scaling and anti-scaling ability

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