Rust-removal-free water-based anti-corrosion coating and preparation method thereof

Abstract

The invention discloses rust-removal-free water-based anti-corrosion coating and a preparation method thereof. The coating comprises the following components: acrylic acid emulsion, zinc phosphate andsodium nitrite; and other components can be added, so that the performance is further enhanced. The preparation method of the coating comprises the steps of stirring and dispersing the components, grinding and filtering to obtain the rust-removal-free water-based anti-corrosion coating. According to the rust-removal-free water-based anti-corrosion coating provided by the invention, the zinc phosphate and the sodium nitrite form a converted anti-corrosion layer on the rusted surface; meanwhile, rust prevention is further realized through the zinc oxide; and a protective film is formed by combining the acrylic acid emulsion with aluminum stearate powder, so on one hand, air is isolated, and on the other hand, the adhesive force of the coating is increased and the anti-rust effect is furtherachieved.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a rust-free water-based anticorrosion coating and a preparation method thereof. Background technique [0002] At present, in the application process of anti-corrosion coatings, paint coatings are usually used for surface protection on metal surfaces. The painting method is to first use metal anti-rust paint as a primer, and then select different colors of topcoats for coating according to requirements. The conventional operation method is to pre-treat the metal surface first, pickling, phosphating or sandblasting the floating rust or oxide layer on the metal surface, and then polishing the rust removal method, and then applying anti-rust paint Brush treatment, and then apply topcoat after drying. Its disadvantage is that this anti-rust process only uses paint to block the reaction between moisture and oxygen in the air, so as to prevent secondary rust. But in fact, the float...

AI Technical Summary

Problems solved by technology

The disadvantage is that this anti-rust process only uses paint to block the reaction between moisture and oxygen in the air, so as to prevent secondary rusting.

But in fact, the floating rust on the metal surface can be removed, but the oxide layer cannot be removed. In the end, there will be some residual parts on the metal surface layer. Therefore, after the current conventional antirust paint is used on metal parts, it is easy to cause secondary damage. Rust return, shortening the anti-rust cycle

At the same time, traditional paints are generally diluted with solvents such as xylene and toluene, which are toxic and harmful to human health; traditional anti-rust products do not have the function of removing rust. Before painting, it is necessary to manually scrape the rust spots on the surface and clean the surface , resulting in a lot of labor and cost

Images