Method for preparing faucet with metallic luster by coating brass or zinc alloy base material

Abstract

The invention relates to the technical field of bathroom decoration, in particular to a method for preparing a faucet with metallic luster by coating a brass or zinc alloy base material. The method comprises the following steps: pretreating and preheating the surface of the base material; spraying organic silicon primer on the surface of the base material, and curing; placing the base material treated in the above step in a multi-arc ion coating box for vacuum coating, wherein the vacuum coating mode is multi-arc ion coating, biasing and magnetron sputtering coating; spraying a PP treating agent on the surface of the coated base material, and curing; and spraying polyacrylate baking varnish on the surface of the cured base material, and curing to obtain the faucet with the metallic luster. According to the method, a layer of organic silicon primer is sprayed on the surface of the base material, a layer of pp treating agent is firstly sprayed after vacuum coating, and then polyacrylate stoving varnish is sprayed, so that the binding force between coatings is greatly enhanced, the metallic luster is enhanced, and the problems that the binding force is low and the metallic luster is not lasting when a brass or zinc alloy base material is coated in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of bathroom decoration, in particular to a method for preparing a metallic luster faucet by coating a brass or zinc alloy substrate. Background technique [0002] With the development of society, people's appearance technology of bathroom hardware is getting higher and higher. At present, the existing faucet will be electroplated with a decorative layer on its surface. The process of water electroplating process is: electrolytic degreasing-acid activation-alkali plating Copper—cleaning—copper acid plating (copper sulfate)—cleaning—nickel plating (twice)—cleaning—chrome plating, because many times of degreasing and pickling are often required in the water electroplating process, and a variety of different processes are required. The continuous replacement of the electrolyte can effectively cause the cations to be plated in the plating solution to be deposited on the surface of the base metal through electroly...

AI Technical Summary

Problems solved by technology

[0002] With the development of society, people's appearance technology of bathroom hardware is getting higher and higher. At present, the existing faucet will be electroplated with a decorative layer on its surface. The process of water electroplating process is: electrolytic degreasing-acid activation-alkali plating Copper—cleaning—copper acid plating (copper sulfate)—cleaning—nickel plating (twice)—cleaning—chrome plating, because many times of degreasing and pickling are often required in the water electroplating process, and a variety of different processes are required. The continuous replacement of the electrolyte can effectively cause the cations to be plated in the plating solution to be deposited on the surface of the base metal through electrolysis, forming a structurally stable coating. Therefore, there are serious environmental pollution such as water pollution and huge environmental protection pressure. , and the decorative color of the faucet obtained by the traditional water electroplating or baking varnish is single, the color range of the decoration is limited, the design materials and space of the faucet decoration are limited, and the decoration process of the faucet is greatly restricted.

Therefore, some manufacturers have begun to use the vacuum coating process to coat bathroom hardware such as faucets. Vacuum coating includes vacuum evaporation, multi-arc ion coating and magnetron sputtering coating. The uniformity of the coating is poor, so the process of vacuum evaporation has great limitations; while multi-arc ion coating and magnetron sputtering coating are popular because of their strong adhesion and good surface effect. However, in In the current application, when the multi-arc ion coating process is used to coat the surface of the faucet made of brass and zinc alloy, there are problems of poor adhesion of the surface coating layer and no metal brightness. Although the prior art is performing multi-arc ion coating , first spray a layer of primer on the surface of the substrate, but there is still a problem of low bonding between the primer and the coating layer, which will easily cause the coating layer to fall off, so that the metallic luster is not durable, and in order to increase the wear resistance and antibacterial of the faucet surface, etc. performance, a layer of topcoat is often sprayed on the surface of the coating layer, but the topcoat layer in the prior art can block the metallic luster of the coating layer to a certain extent, making the metallic luster of the faucet surface weaker, and the coating layer in the prior art There is also the problem of low bonding force between the coating layer and the topcoat layer, and the adhesion between the coating layer and the topcoat layer is difficult to reach level 0, resulting in easy peeling off of each coating layer, and the metallic luster is not durable, which affects the use of faucets made of brass or zinc alloy. life

Images