Hydrophobicity-enhanced powder coating for corrosion protection of pump valves

Abstract

The invention discloses hydrophobicity-enhanced powder coating for corrosion protection of pump valves. The hydrophobicity-enhanced powder coating is prepared from the following raw materials by weight: 52 to 54 parts of hydroxyl polyester resin, 7 to 8 parts of fluorine-carbon resin, 4 to 5 parts of triglycidyl isocyanurate, 13 to 15 parts of nano aluminum sesquioxide, 0.8 to 0.9 part of perfluoro octyl triethoxy silane, 25 to 30 parts of an ethanol solution of which the concentration is 75%, 0.5 to 0.6 part of a silane coupling agent kh560, 14 to 16 parts of calcium carbonate, 2.5 to 3.5 parts of stearic acid, 6 to 7 parts of nano-silicon sol, 2 to 3 parts of polyvinyl pyrrolidone, 1 to 1.2 parts of dibutyltin dilaurate, 0.9 to 1.1 parts of polydimethyl siloxane, and a proper amount of water. The prepared powder coating is high in leveling property, smooth in a formed coating layer, and high in corrosion resistance, is sprayed on the surface of a pump valve material via static electricity, and has the effects of resisting wiping, preventing shedding, and being long in service life.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a hydrophobic-enhanced anti-corrosion powder coating for pump valves. Background technique [0002] In recent years, the application of powder coatings has surpassed water-based coatings and high-solid coatings in the coatings industry, and has become one of the most widely used coatings in the industry. The powder coating process solves the problems of flammability, explosion and environmental pollution in the traditional paint coating process, and its coating has superior performance, the raw materials can be recycled and reused, and the coating process is simple. It can be widely used in the coating of pump and valve shells. Since the pump valve is a casting or forging, its surface is rough. At present, there are still some defects in the functional powder coating technology for valve surface treatment in the existing technology, which leads to defects such as shrinkage cavi...

AI Technical Summary

Problems solved by technology

Since the pump valve is a casting or forging, its surface is rough. At present, there are still some defects in the functional powder coating technology for valve surface treatment in the existing technology, which leads to defects such as shrinkage cavities, pinholes and severe orange peel in the coating, which in turn leads to The application of pump valves in special fields such as food, biology, pharmaceuticals, chemicals, aerospace and electronics is limited

Moreover, most of the pump valves will be used in high water content, high sand content, strong corrosion medium environment and other factors, which will aggravate the corrosion of the pump valve and make it easier to scale on the pump valve, resulting in short service life of the pump valve and short inspection cycle. , The problem of heavy workload brings inconvenience to the use. The general surface strengthening process mainly includes metal coating, ceramic coating and other coatings. Although the wear is slowed down to a certain extent and the corrosion resistance is improved, they all exist. Disadvantages: the metal coating is easy to delaminate and cause shedding; ceramics have poor impact resistance and are prone to cracking; some polymer coatings have poor mechanical and thermal properties, etc.