A water-based inorganic rust-removing high-temperature-resistant anti-corrosion coating and preparation method thereof

Abstract

The invention relates to waterborne inorganic rust-removing high-temperature-resistant corrosion-resistant coating applicable to rusted surfaces. The waterborne inorganic rust-removing high-temperature-resistant corrosion-resistant coating comprises, by weight, 28-40 parts of silicic acid / methyl lithium silicate / sodium mixed resin, 70-59 parts of corrosion-resistant filler and 1-2 parts of auxiliaries, wherein the mole ratio of silicate to methyl silicate to lithium ions to sodium ions of the silicic acid / methyl lithium silicate / sodium mixed resin is (1.2-1.5):(0.4-0.46):(5.5-6):(0.9-1.2); thecorrosion-resistant filler comprises, by weight, 0-65 parts of iron oxide red, 0-51 parts of silane coupling agent modified zinc powder, 0-14 parts of aluminum dihydrogen phosphate, 0.6-2 parts of glass flake powder, 0.6-3 parts of aluminum oxide, 0.6-3 parts of aluminum hydroxide, 3-16 parts of mica iron oxide and 0-1.4 parts of tannin. The waterborne inorganic rust-removing high-temperature-resistant corrosion-resistant coating is capable of satisfying the corrosion preventing requirements of existing high-temperature equipment and high-temperature process pipelines, single in component, convenient in construction, good in corrosion resistance, fast in solidification, free of VOC, environmentally friendly and nontoxic.

Description

technical field [0001] The invention relates to an anti-corrosion material and a preparation method thereof, in particular to a zero-VOC water-based inorganic compound anti-corrosion and high-temperature-resistant anti-corrosion coating, which belongs to the field of high-temperature-resistant anti-corrosion materials. Background technique [0002] The existing domestic anti-corrosion coatings mainly include various organic anti-corrosion coatings such as epoxy and polyurethane. There are disadvantages in the anti-corrosion of high-temperature equipment and high-temperature process pipelines, and because organic resin coatings contain a large amount of solvents, their VOC content is generally high, so they are not suitable for chemical plants (such as: various high-temperature process pipelines in chemical plants) with temperature operations and The construction of confined spaces (such as anti-corrosion renovation inside bridge box girders) has a great impact on constructio...

AI Technical Summary

Problems solved by technology

There are disadvantages in the anti-corrosion of high-temperature equipment and high-temperature process pipelines, and because organic resin coatings contain a large amount of solvents, their VOC content is generally high, so they are not suitable for chemical plants (such as: various high-temperature process pipelines in chemical plants) with temperature operations and The construction of confined spaces (such as anti-corrosion renovation inside bridge box girders) has a great impact on construction personnel and the environment. Traditional organic anti-corrosion coatings produce a large amount of harmful substances and flammable volatiles during the curing process, which seriously affects construction personnel and construction. The environment and safety of the project location, waste will cause serious pollution, traditional organic materials are hazardous chemicals, and corresponding safety protection measures need to be taken during logistics distribution and transportation

In terms of inorganic anti-corrosion coatings, the existing inorganic zinc-rich coatings have high requirements on the surface treatment of substrates, which cannot meet the anti-corrosion requirements of a large number of high-temperature equipment and high-temperature process pipelines currently in operation.

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