Zinc-free water-based primer

Abstract

The invention relates to zinc-free water-based primer. The zinc-free water-based primer comprises the following raw materials in percentage by weight: 40 to 50 percent of lithium silicate, 0.1 to 1 percent of a ferrophosphorus powder, 0.1 to 3 percent of a zinc-iron powder, 0.1 to 3 percent of dimethyl ethanolamine, 0.1 to 3 percent of sodium methyl silicate and 40 to 60 percent of tetrabutyl titanate. The problem of secondary rust removal caused by zinc powder is solved, and health hazards to construction personnel and environmental pollution are solved; moreover, the adhesive force is obviously more excellent than that of inorganic zinc product under the condition that surface treatment is not ideal.

Description

technical field [0001] The invention relates to a water-based primer, in particular to a zinc-powder-free water-based primer, which belongs to the technical field of coatings. Background technique [0002] At present, zinc-rich primers are the most common and important as anti-corrosion and shop primers for steel structures. Zinc-rich coatings are mainly used in the form of zinc-rich primers for anti-corrosion of various steel structures. Because the formula contains a large amount of electrochemical anti-rust pigment-zinc powder, it is called zinc-rich coatings. [0003] Zinc-rich paint film is hard, good adhesion, strong anti-rust ability, has excellent three-proof (moisture-proof, anti-salt spray, anti-mildew) performance and anti-oxidation and anti-corrosion performance; excellent cathodic protection and static electricity. There is no adverse effect on welding performance, and it can be used with most coatings. It has become the most common and important primer in the ...

AI Technical Summary

Problems solved by technology

[0007] Since the content of zinc powder in zinc-rich paint (paint) is between 85-95%, it is easy to produce secondary flash rust; the rust removal requirements for the substrate are high; since zinc powder is an expensive metal mineral, the price starts from 10 yuan / kg soars to more than 30 yuan / kg; for the construction party: the surface treatment of the substrate must be sandblasting and shot blasting to reach the level of mechanical derusting Sa2.5; The upper cover is connected with paint, otherwise there will be secondary flash rust, which has high requirements for rust removal and strict labor protection requirements for personnel; and the price is expensive

[0008] Although inorganic zinc-rich paint has the advantages of fast drying and high temperature resistance, a large amount of zinc will overflow from the paint film of zinc-rich paint when welding and cutting flames, and the steam generated will seriously harm the health of workers. Operators are prone to hot zinc disease