High-performance easy-construction two-component aqueous epoxy zinc-rich coating and preparation method thereof

Abstract

The invention relates to an easy-construction two-component packaging aqueous epoxy zinc-rich coating. The coating selects a low-molecular-weight epoxy resin, an active diluent, a high-efficiency antifoaming agent, a wetting dispersant, ultrafine zinc powder, a self-emulsifying aqueous epoxy hardener, a cosolvent and water as raw materials. The aqueous epoxy zinc-rich coating has the advantages of good corrosion resistance, realization of resisting salt spray for 1500h, no foaming, rust or shredding of the coat of the coating, according with requirements of HG / T3668-2009 Zinc Rich Primer, good application performance, convenient onsite use, realization of the thickness of the once-formed coat of above 80mum, 1h surface drying and 16h hard drying at 25DEG C, and satisfying of the steel structure anticorrosion construction requirement. The aqueous epoxy zinc-rich coating can be applied to the anticorrosion of steel structures comprising ships, bridges, sea engineering apparatuses and the like, and can also be applied to the steel plate pretreatment streamline as a workshop primer.

Description

technical field [0001] The invention relates to an anti-corrosion coating and a preparation method thereof, especially a high-performance and easy-to-construct two-component water-based epoxy zinc-rich coating and a preparation method thereof. Background technique [0002] Epoxy zinc-rich coating is one of the important anti-corrosion coatings for ships, marine engineering, steel structures, etc. It has excellent anti-corrosion performance and can prolong the anti-corrosion period of the coating system. Because zinc is more active than iron, it is easy to lose electrons. Zinc powder and steel substrate form a primary battery. The electrode potential of zinc is negative than that of iron. Zinc is the anode (usually called sacrificial anode), and iron is the cathode. The current flows from zinc to iron When the zinc-rich paint flows, the steel is cathodically protected; at the same time, the zinc-rich coating is continuously corroded during the application process, and the cor...

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Problems solved by technology

[0007] In order to solve the problem that water easily reacts with zinc powder in the prior art, which affects the storage stability of the coating, which will cause adverse reactions such as swelling and deterioration of the coating, and when the zinc powder is a component of a separate package, the mixing is uneven, the particles are relatively coarse, and the construction When the paint is easy to sink to the bottom, which affects the technical problems such as the actual application of the paint and the anti-corrosion performance, the present invention provides a high-performance and easy-to-construct two-component water-based epoxy zinc-rich paint. Developed for carbon environmental protection and water-based, it can be applied to anti-corrosion of steel structures such as ships, marine engineering equipment, bridges, and docks

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