Petroleum resin modified long-acting anticorrosion epoxy zinc-free coating

Abstract

The invention discloses petroleum resin modified long-acting anticorrosion epoxy zinc-free coating and a preparation method thereof. The petroleum resin modified long-acting anticorrosion epoxy zinc-free coating is characterized by comprising a component A and a component B, wherein the component A contains mixed solvent of dimethylbenzene and polymethyl acrylate (PMA), a modified petroleum resin, a hyper dispersant, an epoxy resin with low molecular weight, calcium fluophosphate powder, mica powder, barite powder, coloring pigment, organic bentonite, polyamide wax pulp and industrial alcohol; and the component B contains low-molecular-weight polyamide resin. The prepared product is low in cost and is the same as or better than zinc-enriched paint in terms of anticorrosion performance.

Description

technical field [0001] The invention relates to a paint, in particular to a steel structure anticorrosion paint with low cost and outstanding performance in the field of environmental protection and chemical anticorrosion. Background technique [0002] In order to ensure the mechanical and anti-seismic performance of the steel structure during its service, the anti-corrosion of the steel structure is in front of us. In general, the means of anti-corrosion mainly include: the use of corrosion inhibitors, electrochemical protection and the use of protective coatings. Zinc-rich coatings have a double protective effect in the corrosion protection of steel structures. Zinc-rich paint refers to the use of a large amount of high-purity zinc powder as the basic filler. A type of coating that utilizes the electrochemical cathodic protection mechanism of zinc to prevent the corrosion of steel substrates. This type of coating is the most commonly used supporting primer for steel str...

AI Technical Summary

Problems solved by technology

② Water-based inorganic zinc-rich coatings have excellent comprehensive performance and many advantages, but there are also some disadvantages in practical applications: poor shielding performance due to microscopic pores of the coating, premature failure of the coating due to increased electrochemical polarizability, and When the layer is thicker, there is a tendency to crack, and the construction performance is not as good as that of organic ones, and the conditions are relatively harsh; although the high-modulus silicate coating has excellent anti-corrosion performance, it has a high viscosity and is easy to gel and has poor stability.

⑤ Epoxy zinc-rich primers that meet the national chemical industry standards, the zinc powder is limited by resources, and the production cost is relatively high

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