A kind of metal substrate waterborne graphene modified long-acting anticorrosive paint and preparation method thereof

Abstract

The invention belongs to the technical field of anticorrosive coatings, and specifically relates to a metal base waterborne graphene modified long-acting anticorrosive paint and a preparation method thereof. The metal base waterborne long-lasting anticorrosive paint comprises the following raw materials in parts by weight: 40-50 parts of composite modified styrene-acrylic emulsion, 10-20 parts ofmodified graphene, 15-25 parts of pigment, 0.5-1 part of an antifoaming agent, 0.3-0.8 part of a leveling agent, 0.5-1 part of a waterborne drier, 0.5-1 part of a wetting agent, 0.8-1.2 parts of an anti-settling agent, 0.1-0.5 part of a dispersant, and 20-35 parts of deionized water. The preparation method comprises: (1) preparation of modified graphene; (2) pigment surface modification; and (3) preparation of the waterborne paint. The metal base waterborne graphene modified long-acting anticorrosive paint has the advantages of long-lasting excellent anticorrosive performance, strong base adhesion, high mechanical strength, excellent friction resistance, excellent solvent resistance and weather resistance, strong construction adaptability and the like; the preparation method is simple, easy to operate, low in raw material and energy consumption costs, environmentally-friendly and pollution-free; the coating is quickly dried, and the construction period is short.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, in particular to a water-based graphene-modified long-acting anti-corrosion coating for metal substrates and a preparation method thereof. Background technique [0002] Corrosion of metal is a phenomenon in which metal is destroyed by chemical or electrochemical action of environmental medium. The corrosion of metals spreads all over the national economy and brings huge losses to the national economy. In industrially developed countries, the direct economic loss caused by corrosion accounts for 1% to 4% of the total output value of the national economy, the annual corroded and rusted steel accounts for about 20% of the output, and about 30% of the equipment is scrapped due to corrosion. In China, the economic loss caused by metal corrosion is as high as 30 billion yuan per year, accounting for 4% of the gross national product. For a long time, people have used a variety of techn...

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Problems solved by technology

However, the current anti-corrosion coatings, because the main chain in the film-forming material is composed of C-C bonds, are prone to breakage of chemical bonds under the irradiation of ultraviolet light, thus losing the anti-corrosion function, resulting in a short anti-corrosion life; therefore, the development of long-term Efficient anti-corrosion coatings have become an important direction of current coatings research

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