An all-dry method for performing composite coatings with high decorative functions on metal surfaces

Abstract

The present invention relates to a full-dry method for a composite coating with a high decorative function on a metal surface. The full-dry method comprises the following steps of 1) performing plasma polishing on a to-be-treated metal blank and washing the metal blank clean to obtain a bright and flat workpiece surface; 2) putting the plasma polished workpiece in a vacuum hydrocarbon cleaning machine for treatment; 3) spraying a paint layer on the surface of the well-cleaned workpiece; 4) transferring the sprayed workpiece into a PVD furnace to carry out plasma gas activation; 5) carrying out arc coating on the paint surface of the activated workpiece to coat a ceramic compound film with the thickness of 0.1-1 [mu]m. Compared with metal products prepared by a conventional method, the metalized metal product prepared by the full-dry method not only has the advantages of corrosion resistance, wear resistance, weather resistance, temperature resistance and the like but also has hard and smooth the surface capable of matching the quality of a conventional water (wet) plating metal product. Besides, no harmful electroplating liquid is used in the full-dry method; metal consumption is small; no VOC and wastewater are discharged; and cost is low.

Description

technical field [0001] The invention relates to a method for obtaining a metal composite layer on a metal surface, in particular to a method for applying a full-dry method to a double-layer composite coating on a metal surface to achieve surface treatment effects such as traditional CP (chrome plating) and PB (imitation gold). Background technique [0002] Traditional water (wet) electroplating on the metal surface can obtain products with high anti-corrosion, high wear resistance, specular high gloss and strong decoration. This kind of metal metallization (plating Cu / Ni / Cr metal film) is widely used and popular It has been a long time. However, the water electroplating process has the following recognized disadvantages: (1) It consumes a lot of water and energy, and produces a large amount of wastewater. (2) Use harmful chemical plating solutions and additives. (3) Emission of toxic waste gas. (4) A large amount of metal is consumed. (5) Use of hexavalent chromium which...

AI Technical Summary

Problems solved by technology

However, the water electroplating process has the following recognized disadvantages: (1) It consumes a lot of water and energy, and produces a lot of waste water

(3) Emission of toxic waste gas

(4) Large amount of metal consumption

[0003] Chinese patent CN1468976 discloses a surface treatment method suitable for metals and non-metals. It is mainly because the existing surface treatment method has serious environmental pollution, and its anti-corrosion effect and surface gloss are poor after treatment. It is a fixed frame that can be used for positioning items. The items are positioned on the fixed bracket. First, a base film is placed on the surface of the item, and then a metal plating layer is formed by vacuum electroplating. Highly corrosive, wear-resistant and glossy acrylic layer, which can effectively improve the problems existing in common surface treatment methods

[0005] 2) The colored organic coating on the surface is directly exposed to the outside, and the wear resistance and water resistance are poor;

[0006] 3) It needs to spray primer and electrocoating topcoat, the yield rate is not high, and the VOC emission is high, which is not environmentally friendly