Wear-resistant and corrosion-resistant centrifugal pump impeller coating and its preparation method and application

Abstract

The invention discloses a wear and corrosion resisting centrifugal pump impeller coating layer and a preparation method and application thereof. The centrifugal pump impeller coating layer comprises a base layer coating and a surface layer coating. The base layer coating is prepared from, by weight, 11-15 parts of heavy calcium carbonate powder, 3-8 parts of aluminum oxide, 20-27 parts of octyl epoxy stearate, 10-16 parts of nano barium sulfate and 8-13 parts of dimethyl formamide. The surface layer coating is prepared from, by weight, 5-9 parts of silicon dioxide, 3-8 parts of zirconium silicate, 18-25 parts of epoxy resin, 14-20 parts of chlorinated paraffin, 20-27 parts of polypropylene resin and 5-10 parts of cobaltous hydroxide. All the raw materials in the base layer coating are placed into a ball mill to be subjected to ball milling, sieving and ultrasonic oscillation to obtain the base layer coating. The raw materials, except for the chlorinated paraffin, in the surface layer coating are ball-milled and sieved, then the chlorinated paraffin is added, ultrasonic oscillation and heat treatment are carried out, and therefore the surface layer coating is obtained. A centrifugal pump impeller is high in corrosion resistance and wear resistance, the service life is prolonged, the production process is stable and reliable, the coating layer construction cost is reduced, and construction is convenient.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a wear-resistant and corrosion-resistant centrifugal pump impeller coating and a preparation method and application thereof. Background technique [0002] Centrifugal pumps work by rotating the impeller to cause the water to move centrifugally. Before starting the pump, the pump casing and the suction pipe must be filled with water, and then the motor is started to drive the impeller and the water to rotate at a high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows through the volute pump casing. The pressure water pipeline flowing into the water pump. The basic structure of a centrifugal pump is composed of six parts: the impeller, the pump body, the pump shaft, the bearing, the sealing ring, and the stuffing box. The impeller is the core part of the centrifugal pump. Its rotating speed is higher than that of th...

AI Technical Summary

Problems solved by technology

However, the current metal coating technology has problems such as short corrosion resistance, weak impact resistance, and poor wear resistance, which limit its rapid development.

At present, some anti-corrosion and wear-resistant coatings are also disclosed. However, the prior art generally only discloses a kind of base coating or surface coating of the coating, and often ignores the combination of different base coatings and surface coatings.

Images