Nanometer antirust coating for PVC pipe

Abstract

The invention discloses a nanometer antirust coating for a PVC pipe. The nanometer antirust coating comprises, by weight, 20-30 parts of nanometer bentonite, 25-28 parts of nitrocellulose with particle sizes of 5-15 micrometers, 12-15 parts of medium sand, 2-4 parts of a filler, 0.5-0.8 parts of a high-efficiency water reducing agent, 2-4 parts of an Ag-Zn-containing inorganic antibacterial agent,4-6 parts of feldspar, 3-5 parts of an expansion agent, 3-6 parts of graphite powder and 2-4 parts of a rust inhibitor. The nanometer antirust coating can form a compact and hard coating on the surface of a PVC pipe and has high strength, high wear resistance, high temperature resistance, corrosion resistance and aging and warping resistance. The expansion agent can offset the shrinkage of the mortar and effectively reduce the shrinkage and cracking. The high-efficiency water reducer can reduce the use amount of water in the mortar, reduce the water-cement ratio, and reduce the shrinkage of the mortar during the setting process. The rust inhibitor improves the structural durability and helps to resist the corrosion of the steel bar in order to improve the sealing performance of a PVC pipeand effectively prolongs the service life of a PVC pipe.

Description

technical field [0001] The invention belongs to the technical field of nano coatings, in particular to nano antirust coatings for PVC pipe fittings. Background technique [0002] The main component of PVC is polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is back-coated adhesive. PVC pipe (UPVC pipe) Rigid polyvinyl chloride pipe is made of polyvinyl chloride resin, stabilizer, lubricant, etc., and is extruded by hot pressing. It is the earliest plastic pipe that has been developed and applied. At present, due to environmental factors such as weather, climate, and humidity, many PVC pipe fittings have high humidity in the storage environment of PVC pipe fittings, and moisture penetrates into the pipe fittings, resulting in aging and warping of PVC pipe fittings. In order to solve this pheno...

AI Technical Summary

Problems solved by technology

At present, due to environmental factors such as weather, climate, and humidity, many PVC pipe fittings have high humidity in the storage environment of PVC pipe fittings, and moisture penetrates into the pipe fittings, resulting in aging and warping of PVC pipe fittings. In order to solve this phenomenon, improving the utilization rate of PVC pipe fittings has become an important topic

[0003] However, there will be different degrees of shrinkage during use, which will not only lead to cracking of the repair surface, but also affect the durability of the structure

At the same time, the existing coating still has the problem of low density, and it is easy to cause corrosion inside the repaired part, which further affects the durability of the structure