Aqueous anticorrosive paint of steel structure and preparation method thereof

Abstract

The invention provides an aqueous anticorrosive paint of a steel structure and a preparation method thereof, belonging to the technical field of steel surface anticorrosive coating. The paint comprises the following materials in percentage by weight: 15-25% of rust transforming agent, 6-10% of epoxy emulsion, 40-60% of cation styrene-acrylic emulsion, 0.1-0.2% of penetrating agent, 0.1-0.5% of glycol ether, 0.1-0.3% of dispersion stabilizer and 10-20% of deionized water. The product prepared by the preparation method provided by the invention has the characteristics such as a simple preparation process, low cost, excellent performances, and the like.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion coating on steel surfaces, and in particular relates to a water-based rust surface anticorrosion coating for steel structures and a preparation method thereof. The anticorrosion coating can be directly used to coat the surface of corroded steel structure materials. Background technique [0002] According to statistics, the direct economic loss caused by metal corrosion accounts for about 4% of the gross national product in my country every year. Therefore, the corrosion protection of metals has attracted more and more attention. In the previous metal anti-corrosion coating technology, the metal surface pretreatment before painting accounted for about 45% of the total price of the entire coating project. In order to protect steel from corrosion and prolong its service life, anti-corrosion coating on steel has become the most economical and effective method. In order to obtain excellent corr...

AI Technical Summary

Problems solved by technology

For example, the existing water-based antirust coatings with rust generally have problems such as high cost, poor water resistance, and poor decoration.

For example, the invention patent CN1264754A uses phosphoric acid and organic acids, catalysts, corrosion inhibitors, active agents, penetrating agents and alloy powders to prepare water-based rust conversion agents, which solves the problems of water-based rusty coatings and construction pollution. The binding force with the outer coating film is poor, and the invention patent CN10132726A uses rust converting agents such as tannic acid and phosphoric acid, and styrene-acrylic solution as film-forming substances, together with fillers, etc. to prepare water-based rusty coatings. The process is complex and the rust transformation is not complete

Another example is that the invention patent CN101638541A ​​adopts ethylene-propylene emulsion as a film-forming material to prepare a water-based rust coating with good stability, but the adhesion and water resistance of this coating are relatively poor

In order to overcome the deficiencies in the prior art, the present invention has developed a kind of fast rust conversion agent, with epoxy emulsion and cationic styrene-acrylic solution and polyaniline emulsion composite film-forming material, has solved the uniformity of the current water-based rust coating film-forming, The problem of easy whitening of the coating film and poor rust conversion ability

Images