Double-ingredient chrome-free water-based metal anticorrosive paint and preparation method thereof

Abstract

The invention relates to the field of environment-friendly paint, in particular to double-ingredient chrome-free water-based metal anticorrosive paint and a preparation method thereof. The anticorrosive paint comprises an ingredient A and an ingredient B, wherein the ingredient A is prepared from ingredients including zinc powder, aluminum power, passivants, dispersing agents and surfactants. The ingredient B is prepared from ingredients including silane coupling agents, boracic acid, passivant, natural zeolite and deionized water. The preparation method comprises the following steps that the ingredient A is stirred and mixed to prepare the ingredient A; firstly, the natural zeolite, the passivant and the deionized water are mixed, and are then mixed and stirred with the silane coupling agents and the boracic acid to prepare the ingredient B. Before use, the ingredient A and the ingredient B are mixed, stirred and uniformly prepared into finished product paint according to a weight proportion of 1:(1.3-1.4); the paint can be coated in a brush coating, spray coating or dip-coating mode; heating is used for sintering curing. The double-ingredient chrome-free water-based metal anticorrosive paint has the advantages that no heavy metal ionic compound such as hexavalent chromium, lead, mercury and cadmium compound exist; volatile noxious solvents such as benzene and xylene are not contained; the storage stability of the finished product paint is greatly improved; the anti-corrosion performance of a coating is also improved.

Description

technical field [0001] The invention relates to a preparation method of a metal anticorrosion coating, in particular to a two-component chromium-free water-based metal anticorrosion coating and a preparation method thereof. Background technique [0002] Zinc-chromium coating (also known as Dacromet coating) technology has developed rapidly since its appearance, and its application fields have been extended to industries such as medicine, electric power, petrochemical industry, and military industry. However, because the traditional zinc-chromium coating contains hexavalent chromium, which is harmful to human body, countries all over the world, especially developed countries, have begun to take increasingly strict measures to limit its use. Therefore, there is an urgent need to develop new chromium-free coatings to meet health and environmental requirements. At present, a variety of chromium-free zinc-aluminum coatings have been launched at home and abroad, and as an updated...

AI Technical Summary

Problems solved by technology

However, because the traditional zinc-chromium coating contains hexavalent chromium, which is harmful to the human body, countries around the world, especially developed countries, have begun to take increasingly strict measures to limit its use.