Coating for rusted coating of surfaces of rusted hot-dip galvanized steel structures

Abstract

The invention belongs to the technical field of anticorrosive paint, and particularly relates to a coating for rusted coating of surfaces of rusted hot-dip galvanized steel structures. The coating comprises a coating A and a coating B; the coating A is prepared from, by weight, 5-8 parts of lauric acid, 12-20 parts of epoxy resin, 42-53 parts of reduced zinc powder, 10-20 parts of xylene, 2-5 parts of ethyl alcohol, 2-4 parts of organic bentonite, 5-10 parts of hectorite and 20-25 parts of water; the coating B is prepared from the following components in parts by weight: 7 to 9 parts of polyepoxysuccinic acid, 3 to 5 parts of a silicate, 2 to 4 parts of a molybdate, 12 to 14 parts of ethylene glycol, 6 to 9 parts of N-sodium lauroyl sarcosine, 8 to 12 parts of acrylic emulsion and 5 to 8 parts of water. The coating has good binding force with the surfaces of the hot-dip galvanized steel, and the adhesive force is 0 grade; the coating is good in flexibility and corrosion resistance, andcan be used for coating the rusted surface of rusted hot-dip galvanized steel with rust.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a coating used for coating with rust on the surface of corroded hot-dip galvanized steel structures. Background technique [0002] Hot-dip galvanizing is an anti-corrosion method that is widely used in steel structures. In order to prevent the surface of the steel plate from being corroded and prolong its service life, a layer of metal zinc is coated on the surface of the steel plate. This galvanized thin steel plate is called galvanized Plate, hot-dip galvanized. However, after the hot-dip galvanized layer is corroded, when it is protected again, because the surface energy of the zinc layer is very low, the adhesion of many coatings on its surface is poor, and the protective effect is greatly affected. Paint coating is one of the most effective ways to prevent corrosion of steel structures. Before the rusty steel substrate is coated with anti-rust p...

AI Technical Summary

Problems solved by technology

Existing solvent-based antirust coatings that can be painted with rust not only contain a large amount of volatile and flammable organic solvents, but also contain heavy metals, which are highly toxic and seriously pollute the environment

Although the existing water-based antirust coatings that can be painted with rust can basically meet the requirements of environmental protection regulations, they have developed rapidly in recent years, but the quality is uneven, and the performance cannot be guaranteed.

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