Film coating liquid used in drinking water pipe and method for coating metal drinking water pipe with film

Abstract

The invention provides film coating liquid used in a water pipe, which comprises, by weight, 15-30 parts of bactericidal metal salt, 0.01-0.3 part of complexing agent and 60-85 parts of water. According to the film coating liquid used in the water pipe provided by the invention, through chemical replacement, the silver ions in the soluble silver salt are replaced by metals such as iron and aluminum in the metal water pipe, so that a compact bactericidal metal layer is formed on the inner wall of the water pipe, and the cleanness of drinking water is guaranteed by using the bactericidal performance of the bactericidal metal. A method for coating the inner wall of the water pipe with the film by adopting the film coating liquid can prevent dirt and bacterial colony from being generated again, and after film coating, the bactericidal metal layer can effectively prevent the pipe wall of the metal water pipe from being oxidized by oxygen in water and prevent dirt from being generated, so that the generation of rust and bacteria is fundamentally reduced, the problems of continuous secondary pollution and dirt generation of the metal water pipe are solved, and the problems of cleaning andsterilizing the water pipe are solved.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty anti-corrosion coatings, and relates to a water pipe inner coating solution and a water pipe inner coating method, in particular to a drinking water pipe inner coating liquid and a metal drinking water pipe inner coating method. Background technique [0002] Water pipes are water supply pipes. There are three types of water pipes. The first type is metal pipes, such as hot-dip cast iron pipes with plastic lining, copper pipes, stainless steel pipes, and early galvanized pipes. Among them, galvanized pipes are used as water pipes. After several years of use, a large amount of rust and scale are produced in the pipe. The yellow water flowing out not only pollutes the sanitary ware, but also contains bacteria that grow on the rough inner wall. The rust causes the heavy metal content in the water to be too high, which seriously endangers human health. Therefore, the country has issued regulations to...

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Problems solved by technology

[0005] More importantly, the above-mentioned existing technologies in the industry are still in the stage of cleaning water pipes. Although some scale and rust can be removed, they cannot prevent re-pollution of water pipes and the generation of dirt and rust.

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