Flaky inorganic filler heavy-duty anti-corrosion epoxy composite coating with multi-layer structure

Abstract

The invention discloses a flaky inorganic filler heavy-duty anti-corrosion epoxy composite coating with a multi-layer structure, and relates to the technical field of anti-corrosion coatings. The heavy-duty anti-corrosion epoxy composite coating is prepared from a component A and a component B according to a mass ratio of 3:(1.0-1.4). The component A is prepared from the following raw materials in parts by weight: 55 to 68 parts of bisphenol A type epoxy resin E44, 23 to 29 parts of butyl glycidyl ether, 0.5 to 0.8 part of graphene, 6 to 15 parts of flaky inorganic filler, 2 to 6 parts of aerogel nano powder and 0.35 to 0.55 part of a de-foaming agent. The component B is a T31 curing agent. According to the invention, the sheet-shaped inorganic filler and the aerogel nanopowder are added into the epoxy resin, and the flaky inorganic filler and the aerogel nanopowder can coexist in the epoxy resin and can be laid layer by layer in the epoxy resin to form a compact elastic barrier, thus the external stress resistance of the epoxy composite coating is improved, and the coating does not easily generate gaps or cracks, so that the structural integrity of the coating can be maintained, and the epoxy resin has excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a multi-layer structure sheet-like inorganic filler heavy-duty anti-corrosion epoxy composite coating. Background technique [0002] In the high-salt and high-humidity environment of the ocean, metal substrates face many environmental tests such as seawater immersion, salt spray erosion, alternating wet and dry, and alternating pressure, which can easily cause corrosion and damage the original metal structure. Applying heavy-duty anti-corrosion coatings to marine equipment can effectively improve its anti-corrosion ability, and it is also a widely used anti-corrosion method at present. The existing zinc-rich and other heavy-duty anti-corrosion coatings have problems such as low filler usage, serious pollution, and poor construction performance, which need to be solved urgently. [0003] For example, Chinese patent CN2018103527486 discloses a solvent-f...

AI Technical Summary

Problems solved by technology

In the above technical solution, by filling the pores of the joints between the glass flakes and the scales with graphene, although the structural compactness of the glass flakes is effectively improved when they are stacked layer by layer, the shielding ability of the glass flakes is enhanced, thereby The coating has excellent corrosion resistance, but the dense structure formed by layered layers of glass flakes has good rigidity and does not have the effect of dispersing stress. Under the influence of external factors, the coating is prone to cracks or cracks, resulting in The coating will produce large defects during the corrosion process, which will reduce the corrosion resistance of the coating and cannot meet the demand