Spraying method for anti-acidic-corrosion coating for mechanical component

Abstract

The invention relates to the field of machining protecting spraying agents and discloses a spraying method for anti-acidic-corrosion coating for a mechanical component. According to the key points ofthe spraying method, the surface of the mechanical component is cleaned firstly and dried, and the mechanical component is subjected to sand blasting treatment after drying; then undercoat is sprayed,the undercoat is evenly sprayed on the surface of the mechanical component through a spray gun after the undercoat is stirred evenly, and the undercoat surface is polished; and finally, anti-acidic-corrosion finishing coat is sprayed on the polished undercoat surface, wherein the undercoat is waterborne alkyd resin, amino resin, film-forming resin, calcium lignin sulfonate, a water-retaining agent, an organic silicon water repellent and deionized water. The problem that as for a product machined through an existing metal etching technique, usually, the spraying effect is not ideal, or the unqualified position exists in the coating sprayed face, protecting coating suffers from acidic corrosion, thus the mechanical surface is exposed in the exterior environment, and thus the service life ofthe product is shortened are solved.

Description

technical field [0001] The invention relates to the field of protective coatings for mechanical processing, in particular to a method for spraying anti-acid corrosion coatings for mechanical parts. Background technique [0002] In the existing mechanical processing, when the finished product is completed, it is necessary to coat the exterior with paint. The main purpose of this paint is to isolate the humid environment from the metal surface of the machine and reduce the risk of corrosion on the machine surface. However, in actual use, conventional paint can only be used Isolate the general humid environment. As carbon dioxide emissions exceed the standard, there is a certain amount of acid rain in all major, medium and small cities. Although conventional coatings can isolate the humid environment, as the droplets adsorbed on the surface of the machine dry, the concentration of the acidic liquid increases. The surface of the paint is corroded, causing the mechanical surface ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the fact that the products processed by the existing metal etching process often have unsatisfactory spraying effects, or there are unqualified parts on the sprayed paint surface, and the protective coating is corroded by the acidic environment, which causes the mechanical surface to be exposed to the external environment and reduces its use. To solve the problem of service life, provide a method of spraying anti-acid corrosion paint for mechanical parts