Stabilized coating for surface rust layer of weatherproof steel

Abstract

The invention provides a stabilized coating for a surface rust layer of weatherproof steel. The coating is prepared from the following components in percentage by weight: 4.1-6.5% of polyvinyl butyral resin, 8.5-8.7% of chromium sulfate, 3.7-5.7% of a corrosion inhibitor, 12.9-13.2% of iron red, 28.3-28.9% of barium sulfate and the balance of a solvent which is absolute ethyl alcohol, wherein the corrosion inhibitor is sodium molybdate, or sodium molybdate and at least one of zinc phosphate and talcum powder; zinc phosphate accounts for 0-1.0% of the total weight of the coating and talcum powder accounts for 0-2.0% of the total weight of the coating. The coating prepared by using a universal coating preparation process is simple in component and treatment process. The coating is spread in a brush coating manner without multiple steps for treatment; the coating can be cured at a normal temperature in a short time and can be used for enhancing the corrosion resistance of a weatherproof steel matrix and improving the surface rusty liquid sagging phenomenon.

Description

technical field [0001] The invention belongs to the field of organic-inorganic composite coatings on the surface of weathering steel, and in particular relates to a coating for stabilizing the rust layer on the surface. Background technique [0002] Weathering steel has good atmospheric corrosion resistance, and a dense and stable rust layer can be formed on the surface during use. This rust layer has good corrosion resistance and can effectively prevent the entry of corrosive media. The exposed use of weathering steel eliminates the need for painting and regular anti-corrosion treatment, so it can produce good economic and environmental benefits. However, weathering steel also has some problems when it is used bare. First of all, it takes 4 to 10 years to form a stabilized rust layer on the surface of weathering steel. Before that, exposed weathering steel, like ordinary carbon steel, produces loose rust layers and rust liquids such as red rust and yellow rust, and the rus...

AI Technical Summary

Problems solved by technology

Obviously, this treatment technology is cumbersome and requires high temperature curing, so it is not suitable for practical application in the field.

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