Railway steel bridge coating waterproof anti-corrosion paint and preparation method thereof

Abstract

The invention discloses railway steel bridge coating waterproof anti-corrosion paint and a preparation method thereof, wherein the paint is prepared from the following ingredients in parts by mass: 20 to 40 parts of epoxy resin, 60 to 80 parts of ethylene glycol, 30 to 50 parts of sodium nitrite, 20 to 40 parts of nitrilo-triethanolamine, 20 to 30 parts of kieselguhr, 2 to 8 parts of trimethylolpropane, 1 to 5 parts of diphenyl-methane-diisocyanate, 1 to 5 parts of zinc phosphate,1 to 6 parts of iron oxide red or iron oxide yellow and 2 to 10 parts of coal tar. The railway steel bridge coating waterproof anti-corrosion paint has the advantages that under the mutual cooperated effect of all ingredients, the film coating anti-impact intensity reaches 30MPa or higher; the appearance of the coating film is smooth and bright; the attachment force is the first grade; no abnormity exists after the salt spray resistance for 45d; no abnormity exists after the water resistance for 100d; the surface drying is 0.5 to 2h; the full drying is within 16h; excellent application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of coating coatings for railway steel bridges, in particular to a waterproof and anti-corrosion coating for railway steel bridges and a preparation method thereof. Background technique [0002] Corrosion of metal is a phenomenon in which metal is destroyed by chemical or electrochemical action of environmental medium. The corrosion of metals spreads all over the national economy and brings huge losses to the national economy. In industrially developed countries, the direct economic loss caused by corrosion accounts for 1% to 4% of the total output value of the national economy, the annual corroded and rusted steel accounts for about 20% of the output, and about 30% of the equipment is scrapped due to corrosion. In China, the economic loss caused by metal corrosion is as high as more than 30 billion yuan per year, accounting for 4% of the gross national product. [0003] For a long time, people have used a ...

AI Technical Summary

Problems solved by technology

However, the existing anti-corrosion coatings still have deficiencies in hardness, heat and humidity resistance, quick-drying, hiding power, etc., and it is difficult to meet the anti-corrosion requirements of high quality or harsh environments