Heavy-duty anti-corrosion coating layer and coating process thereof

Abstract

The invention discloses a heavy-duty anti-corrosion coating layer and a coating process thereof. The heavy-duty anti-corrosion coating layer comprises a bottom coating layer and a surface coating layer, wherein the bottom coating layer comprises the following components in parts by weight: 30-40 parts of glycidyl amine type epoxy resin, 25-35 parts of bisphenol A epoxy resin, 6-10 parts of imidazole, 1-3 parts of mica, 2-4 parts of silica powder, 2-4 parts of talcum powder, 1-4 parts of titanium dioxide, 4-6 parts of a solvent, 3-5 parts of a modifier, 0.5-1 part of a defoaming agent and 1-5 parts of a rare earth drier; and the surface coating layer comprises the following components in parts by weight: 60-70 parts of bisphenol A epoxy resin, 10-15 parts of fatty amine, 2-4 parts of titanium dioxide, 10-15 parts of a solvent, 1-2 parts of a defoaming agent, 1-2 parts of nano silicon dioxide and 1-5 parts of a rare earth drier. The bottom coating layer has the advantages that the bottom coating layer is prepared by mixing glycidyl amine type epoxy resin and bisphenol A epoxy resin, the corrosion resistance is strong, and the modifier is added, so that a coating has strong adhesiveness; the rare earth drier is adopted, so that the surface drying speed of the coating is high; and nano silicon dioxide is added into the surface coating layer, so that the service life is prolonged.

Description

technical field [0001] The invention relates to the field of anti-corrosion, in particular to anti-corrosion coatings, in particular to a heavy-duty anti-corrosion coating and a coating process thereof. Background technique [0002] In the existing chemical liquid storage, metal tanks are generally used for storage. There is a large amount of acidic liquid in the chemical liquid, so a shielding layer is loaded on the inner wall of the metal tank. The existing shielding layer uses a rubber layer, but the thickness of the rubber layer is large. , easy to age and harden, the adhesion to the tank is not enough, and it is inconvenient to repair after damage occurs. [0003] Existing shielding layers also have coatings, generally epoxy resin coatings, which have anti-corrosion effects, but the existing coatings used have weak anti-corrosion effects, resulting in short service life when used on the inner wall of chemical tanks. And when existing paint is brushed, adopt multi-layer...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a heavy-duty anti-corrosion coating and its application process, in order to solve the defects of poor anti-corrosion effect and slow drying speed of existing coatings

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