Graphene modified steel structure water-based anti-corrosive paint and preparation method thereof

Abstract

The invention discloses a graphene modified steel structure water-based anti-corrosive paint and a preparation method thereof. The anti-corrosive paint is prepared from the components in percentage byweight: 10 to 20 percent of deionized water, 5 to 10 percent of graphene dispersion liquid, 30 to 40 percent of anionic acrylic emulsion, 5 to 13 percent of pigment, 20 to 30 percent of filler, 0.1 to 0.8 percent of wetting dispersant, 0.1 to 0.5 percent of defoaming agent, 0.2 to 0.5 percent of pH modifier, 0.3 to 0.6 percent of thickening agent, 0.2 to 0.5 percent of SiO2 hollow microspheres, 0.1 to 0.4 percent of RS preservative, and 2 to 5 percent of coalescing agents. The sum of the weight percent contents of the components in the graphene modified steel structure water-based anti-corrosive paint is 100 percent. Due to the interaction and the space effect among the graphene, the SiO2 hollow microspheres, the pigment and the filler, the defects of poor water fastness, weather fastnessand easiness of flash rust of a traditional water-based acrylic anti-corrosive paint are overcome, the hardness of a film is ensured on the basis of flexibility, and the paint has excellent storage and anti-corrosive performances.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, in particular to a graphene-modified water-based anti-corrosion coating for steel structures and a preparation method thereof. Background technique [0002] Steel structure engineering is a structure mainly made of steel, which is one of the main types of modern building structures. The annual steel production in the world exceeds 1 billion tons. It is estimated that the scrapped steel equipment due to corrosion is equivalent to about 30% of the annual output, and about 1 / 3 of them are permanently lost due to unrecyclable, resulting in economic losses of up to ten thousand yuan. One hundred million U.S. dollars. As far as the current stock of science and technology is concerned, it is unrealistic to solve the corrosion problem from the steel structure itself. The cost of stainless steel is expensive, and the price is several to ten times that of ordinary high-quality steel of the same spec...

AI Technical Summary

Problems solved by technology

For example, in order to make the acrylic resin have the characteristics of water solubility, it is necessary to introduce hydrophilic groups such as carboxyl group and hydroxyl group into the acrylic resin molecule during its preparation process. However, it is the introduction of these groups that leads to the resistance of the coating film. Solvent resistance, water resistance, and stain resistance deteriorate, while the hardness of the coating film also decreases, and the cost is also increased

In addition, in order to improve the compatibility and emulsion solubility of acrylic resins, it is often necessary to add a certain amount of hydrophilic additives (such as water-based dispersants, emulsifiers, etc.), these additives will always remain in the coating film after drying and curing. In the coating film, the water absorption of the coating film will eventually increase, which not only seriously affects the anti-corrosion performance of the coating film, but also has a certain impact on the environment

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