Preparation method of weatherable green nontoxic antirust pigment

Abstract

The invention discloses a preparation method of weatherable green nontoxic antirust pigment and belongs to the technical field of preparation of anti-rust pigments. Silica sol is made with tetraethoxysilane, ethylene glycol and deionized water, limestone surface soil is applied to the surface of a self-made inorganic salt solid medium for constant-temperature cultivation to obtain mixed hyphal suspension, ferric chloride, calcium chloride, citric acid and the like are stirred and mixed, mixed solution that is obtained is mixed with the above silica sol and the mixed hyphal suspension, the citric acid is consumed by using microorganisms such that metal ions complexed with the citric acid are released, and metal carbonate and hydroxide precipitates are produced and covered with the silica sol and are calcined at high temperature and then cooled so as to obtain the mixed hyphal suspension. The anti-rust pigment prepared herein is nontoxic, is harmless to human bodies and environments, has good anti-rust effect, also has good weatherability, good covering power and high adhesion, is an ideal replacement for existing anti-rust coatings, and has a promising application prospect.

Description

technical field [0001] The invention discloses a preparation method of a weather-resistant green non-toxic antirust pigment, which belongs to the technical field of antirust pigment preparation. Background technique [0002] Metal corrosion refers to the damage or deterioration of metals caused by the external environment. During corrosion, a chemical or electrochemical heterogeneous reaction occurs at the interface of the metal, which turns the metal into an oxidized (ionic) state. This will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, destroy the geometry of metal components, increase wear between parts, deteriorate electrical and optical physical properties, shorten the service life of equipment, and even cause disasters such as fire and explosion. sex accident. Corrosion not only affects the luster of the original metal, but also brings great economic losses. [0003] The loss caused by metal corrosion ...

AI Technical Summary

Problems solved by technology

[0006] The technical problems mainly solved by the present invention are as follows: the existing anti-rust pigments appear in the process of preparation and use, the weather resistance is poor, resulting in weak adhesion during use, easy to fall off, and contain heavy metal elements such as lead and chromium, In order to solve the problem of harming the human body and the environment, a method for preparing a weather-resistant green non-toxic anti-rust pigment is provided. In this method, ethyl orthosilicate, ethylene glycol, and deionized water are stirred to adjust the pH to obtain a silica sol. Then apply the limestone surface soil on the surface of the self-made inorganic salt solid medium for constant temperature cultivation, rinse the medium to obtain a mixed mycelium suspension, stir and mix ferric chloride, calcium chloride, citric acid, etc. to prepare a mixed solution Mixed with the above-mentioned silica sol and mixed mycelium suspension, use microorganisms to consume citric acid, release the complexed metal ions, generate metal carbonate and hydroxide precipitates, and be coated with silica sol, and then calcined at high temperature, After cooling, the weather-resistant green non-toxic anti-rust pigment is obtained. The anti-rust pigment prepared by the present invention is non-toxic, will not cause harm to the human body and the environment, has good anti-rust effect, and has good weather resistance, hiding power and strong Adhesion, it is an ideal substitute for existing anti-rust coatings, and has broad application prospects