Coating process

Abstract

The invention discloses a coating process. The coating process comprises the following steps: pre-treating a base material; then, degreasing and / or cleaning rust, and drying; and finally, coating prime lacquer. The coating process simplifies the complex pre-treatment process, not only completely satisfies the existing economical model based on low energy consumption, low exhaustion and low pollution, but also generates the effects of circular economy and reaches the requirements for establishing a cleaning production mechanism.

Description

technical field [0001] The invention relates to the field of coating, in particular to an innovation of a coating process and a coating process of new materials in the coating technology. Background technique [0002] Reducing the cost of painting, improving the quality of painting and reducing the pollution of painting have always been the theme of the development of painting technology. [0003] In the traditional coating process, when the anti-rust primer surface treatment is applied to metal and other easy-to-rust items, the surface of the metal must reach the anti-corrosion and rust removal standard St3 or above. , completely remove all the rusted parts on the surface and the original primer and top paint; in the construction stage, at least the primer, middle and top paint should be applied separately to prevent corrosion. The tensile strength of the workpiece treated by the traditional coating process is only 600-800psi, and the coating is easy to detach from the sub...

AI Technical Summary

Problems solved by technology

[0005] 1. The pretreatment process of the traditional coating process has disadvantages such as high energy consumption, high discharge of three wastes, and high environmental pollution, which are harmful to the health of operators;

[0006] 2. The pre-treatment process is complicated, involving a lot of supporting process formulas and parameters, which is not conducive to the company's low-cost operation and employee operation;

[0007] 3. Due to space constraints, large-scale painted parts (such as passenger cars, ship hulls, etc.) may not be phosphated or passivated, and it is difficult to ensure good adhesion and anti-corrosion effects on the substrate, resulting in poor coatings and unnecessary damage. rework;

[0008] 4. Sewage treatment is complex, especially the passivation process uses chromium-containing passivation materials, Cr6 + It is a highly toxic substance and has carcinogenic effects. The maximum allowable discharge concentration in industrial wastewater is 0.5mg / L

The use of chromium-containing passivation materials will undoubtedly increase the cost of wastewater treatment;

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