Temporary steel protective coating and preparation method thereof

Abstract

The invention discloses a temporary steel protective coating. The temporary steel protective coating comprises the following components in percentage by weight: 10-20% of tetraethoxysilane, 3-8% of silane monomer, 35-50% of water, 0.001-0.01% of acidic catalyst, 30-40% of mixed solvent and 1-5% of silane coupling agent. According to the invention, during coating synthesis, tetraethoxysilane, a silane monomer, a mixed solvent, water and an acidic catalyst are subjected to a sol-gel method, thus an organic-inorganic composite material is prepared through self-assembly and is of a three-dimensional mesh structure. A large number of hydroxyl groups are contained in the structure, thus the organic-inorganic composite material can be well combined with chemical bonds on the surface of steel. Thestructure contains one or more organic groups such as methyl capable of exerting hydrophobic effect, thus a base material is separated from water vapor and protection efficacy is achieved. Meanwhile,due to the organic-inorganic hybrid property of the material, the material is excellent in combination with silicates, the material can be used for temporary protection in an early stage of use by building steel and lasting protection after use by the building steel, and the performance of the material is superior to that of a method for spraying a layer of silane coupling agent diluent on the surface of the base material.

Description

technical field [0001] The invention relates to a paint, in particular to a steel temporary protective paint and a preparation method thereof. Background technique [0002] Rebar, which is the most used steel in construction, is rarely protected, and the storage period before use is generally 1-3 months. Under harsh conditions, steel corrosion is serious, resulting in huge waste and economic losses. At the same time, due to the corrosion of steel, it may have defects, so that the building may have potential safety hazards. The steel bars corrode slowly after pouring the cement, resulting in a reduction in the service life of the building. [0003] Construction steel, such as rebar, is rarely protected. One reason is that the cost is too high. The second is that the existing coatings cannot meet the continuous anti-corrosion requirements after construction, and there may be new safety hazards if they are not disposed of (the service life of ordinary anti-corrosion coatings...

AI Technical Summary

Problems solved by technology

Under harsh conditions, steel corrosion is serious, resulting in huge waste and economic losses

At the same time, due to the corrosion of steel, it may have defects, so that the building may have potential safety hazards

There is slow corrosion of steel bars after cement pouring, resulting in a reduction in the service life of the building

[0003] Construction steel such as rebar is rarely protected, one reason is that the cost is too high

Second, the existing coating cannot meet the continuous anti-corrosion requirements after construction, and if it is not disposed of, there may be new safety hazards (the service life of ordinary anti-corrosion coatings generally does not exceed 5 years and does not match the life of the building.

At the same time, steel bars have mechanical requirements in buildings, and ordinary anti-corrosion coatings are difficult to meet), thus increasing the cost

Images