Spraying method for improving quality of primer of anti-corrosion coating of blade profile

Abstract

The invention discloses a spraying method for improving the quality of a primer of an anti-corrosion coating of a blade profile. The spraying method for improving the quality of the primer of the anti-corrosion coating of the blade profile comprises the following steps of (1) controlling a spraying environment, and ensuring temperature, humidity and cleanliness; (2) pre-treating the blade, cleaning the surface of a substrate, and removing pollutants; (3) conducting sand blasting on the substrate, conducting full-coverage sand blasting on an area to be sprayed, and enabling the surface roughness of the substrate to be 4 to 10 microns; (4) conducting primer spraying, spraying a blade body, an air inlet and outlet edge, a blade top and a blade root adapter face step by step, and enabling the coating thickness to be uniform and consistent; and (5) conducting primer surface drying, controlling the surface drying environment and the surface drying time, and after the surface of the coating is completely whitened, conducting curing in a furnace. According to the spraying method, the spraying environment, the substrate surface cleanliness, the substrate sand blasting quality, the spraying technique and the coating surface drying process are controlled, so that the to-be-sprayed process is stable, clean and orderly, the process is prevented from being out of control, the quality problems of blistering, cracking, salient points and the like of the primer are completely eradicated, and then the quality of the primer of the anti-corrosion coating of the blade profile is effectively improved.

Description

technical field [0001] The invention relates to the technical field of blade anti-corrosion processing, in particular to a spraying method for improving the quality of the anti-corrosion coating primer on the blade profile. Background technique [0002] The surface anti-corrosion coating has reliable oxidation resistance and corrosion resistance, and has good bonding strength. The protected parts are especially suitable for harsh climates such as deserts and oceans, as well as high-temperature, corrosive and erosive environments. Therefore, It is suitable for anti-corrosion of the blades of engines, internal combustion engines, compressors and large high-temperature pump bodies. [0003] Different from the dry film lubricating coating for anti-fretting wear of the blade tenons, the anti-corrosion coating for the profile usually consists of two coatings: primer and topcoat. The primer is a phosphate and chromate system containing aluminum powder , which can be used to protec...

AI Technical Summary

Problems solved by technology

The spraying of the topcoat is carried out after the end of the whole primer process. Only by obtaining a high-quality and stable primer can the quality of the topcoat be guaranteed. Quality, spraying technique and surface drying process of the coating are all key factors affecting the quality of the primer. Once the process is out of control during the spraying process, the final cured primer is prone to quality problems such as blistering, cracking, and bumps.