Waterborne residual rust antirust coating and preparation method thereof

Abstract

The invention discloses a waterborne residual rust antirust coating and a preparation method thereof. The waterborne residual rust antirust coating is prepared from styrene-acrylic emulsion, water soluble epoxy resin, water soluble acrylic resin, iron oxide red, graphene, zinc oxide, barium sulphate, transforming agents, a transformation accelerator, a levelling agent, a defoaming agent, a dispersing agent, a thickening agent and water. The waterborne residual rust antirust coating contains no organic solvent, is environment-friendly and pollution-free, has the characteristic that bottom and surface are combined and has an excellent physical and chemical antirust and rust transforming function, is applicable to rust protection of the surface of steel with rust, a hard oxidation skin layer or an oil paint film and is also applicable to rust protection of the surface of rust-free steel, the preparation method is simple, construction is easy, two transforming agents are complexed in the waterborne residual rust antirust coating, so that a binding force between the waterborne residual rust antirust coating and rust is increased, the waterborne residual rust antirust coating can be directly brushed and coated on the surface of rusty steel and is applicable to multiple construction ways such as spraying, brushing and showering, the coating cost is low, and the rust protection requirements of urban road facilities, bridges, oil and gas pipelines, engineering mechanical equipment, ships and the like can be met.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a water-based coating 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 industrial and architectural structures, but its easy to corrode characteristics have brought huge losses to the national economy. In order to protect steel from rust, a layer of paint is often applied to its surface. In the past, before using paint, the base material must be thoroughly derusted, and even the original color of the metal base must be exposed. Large-scale steel installations and facilities, such as oil storage tanks, iron frames, iron bridges, sluice gates, ships, etc., often can only be derusted by hand, which is not only labor-intensive and inefficient, but also difficult to remove rust. Small and medium-sized steel parts can be derusted by shot peening. Although the derusting effect...

AI Technical Summary

Problems solved by technology

Large-scale steel installations and facilities, such as oil storage tanks, iron frames, iron bridges, sluice gates, ships, etc., can only be derusted by hand, which is not only labor-intensive and inefficient, but also difficult to remove rust

Small and medium-sized steel parts can be derusted by shot blasting. Although the derusting effect is good, it is subject to various restrictions due to large dust, loud noise, serious environmental pollution and high labor costs.

With the development of industry, there are more and more projects such as steel bridges and large pipelines. The above rust removal methods are far from meeting the needs of the project. Therefore, it is necessary to develop a coating that can directly paint the surface of corroded steel.

[0003] The Chinese patents whose application numbers are 98112434.8 and 201010214310.5 respectively disclose organic solvent-type A and B two-component anti-rust coatings with rust. The patent discloses a rusty coating for oil well pipes. The coating has the characteristics of good anti-sagging performance, fast surface drying time and integration of the bottom surface, but the solvent used in the coating is xylene, which pollutes the environment