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Coating method for replacing electroplating

A coating method and coating technology, which can be applied to the device for coating liquid on the surface, the coating of coating, the coating of superimposed layer, etc., can solve the problem of weak adhesion between coating and organic coating, difficulty in realizing industrialization, silver Problems such as easy discoloration of mirror restoration and bright coating

Inactive Publication Date: 2012-02-01
HANGZHOU HAIYUAN SURFACE ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problems of cross-linking (coupling) between the organic coating and the metal silver layer (inorganic) and the finish paint are not solved in the above-mentioned patented technology, resulting in weak adhesion between the coating and the organic coating, easy peeling phenomenon, and silver mirror restoration brightness The coating is very easy to change color, it is very difficult to realize industrialization, and the yield is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of coating method that replaces electroplating is characterized in that adopting following steps:

[0019] 1) Pretreatment of metal workpieces before coating: one of phosphating treatment, zirconium treatment and silane treatment;

[0020] 2) Spraying primer: Spray a layer of primer on the surface of the workpiece after pretreatment. The raw material of the primer is epoxy, polyurethane, a kind of fluorocarbon coating, and the coating thickness is 15 microns;

[0021] 3) Spray pre-film: Spray a layer of pre-film on the primer after drying. The pre-film components are palladium chloride 0.2g / L, stannous chloride 8g / L, hydrochloric acid 10g / L, sodium chloride 180g / L For the mixture of L, wash at room temperature for 0.5 minutes with pure water whose conductivity is less than 0.1 μs / cm after coating at 40°C for 1 minute;

[0022] 4) Chemically sprayed metal mirror coating: on the primer after cleaning, adopt two-component spray gun chemical spraying to form metal m...

Embodiment 2

[0028] A kind of coating method that replaces electroplating is characterized in that adopting following steps:

[0029] 1) Pretreatment of metal workpieces before coating: one of phosphating treatment, zirconium treatment and silane treatment;

[0030] 2) Spray primer: Spray a layer of primer on the surface of the workpiece after pretreatment. The raw material of the primer is epoxy, polyurethane, a kind of fluorocarbon coating, and the coating thickness is 25 microns;

[0031] 3) Coating pre-film: apply a layer of pre-film on the primer after drying, the pre-film components are palladium chloride 0.5g / L, stannous chloride 24g / L, hydrochloric acid 15g / L, sodium chloride 180g / L mixture, after coating at 30°C for 1 minute, wash with pure water with conductivity less than 0.1μs / cm at room temperature for 0.5 minutes;

[0032]4) Chemically sprayed metal mirror coating: on the primer after cleaning, adopt two-component spray gun chemical spraying to form metal mirror coating; Co...

Embodiment 3

[0038] A kind of coating method that replaces electroplating is characterized in that adopting following steps:

[0039] 1) Pretreatment of metal workpieces before coating: one of phosphating treatment, zirconium treatment and silane treatment;

[0040] 2) Spray primer: Spray a layer of primer on the surface of the workpiece after pretreatment. The raw material of the primer is epoxy, polyurethane, and one of fluorocarbon coatings, and the coating thickness is 20 microns;

[0041] 3) Coating pre-film: coat a layer of pre-film on the primer after drying, the pre-film components are palladium chloride 0.3g / L, stannous chloride 16g / L, hydrochloric acid 13g / L, sodium chloride 180g / L mixture, after coating at 35°C for 1 minute, wash with pure water with conductivity less than 0.1μs / cm at room temperature for 0.5 minutes;

[0042] 4) Chemically sprayed metal mirror coating: on the primer after cleaning, adopt two-component spray gun chemical spraying to form metal mirror coating; ...

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Abstract

The invention provides a coating method for replacing an electroplating. The coating method comprises the following steps of: pre-treating a metal work piece before coating a metal work piece, spraying primer, spraying a pre-film, chemically plating a metal mirror surface plating layer, washing with pure water, plating an anti-blushing agent and a cross-linking agent, dehydrating and drying, and spraying finishing paint, wherein double-member spray gun is adopted to plate in the step of chemically plating. The coating method provided by the invention has the advantages that: (1) the metal work piece is treated by a nanometer grade silane chemical conversion coating treatment before spraying the primer on the metal work piece so that a base body adhesive force is improved by a covalent bond structure; (2) the reflectivity of a metal bright coating which is chemically plated on the primer reaches 95-100%; (3) a layer of metal complex colorful coating which is sprayed on the chemically sprayed plating layer is highly transparent and the hardness of the metal complex colorful coating is 3-4 H; (4) a molecular bridge structure is formed between an organic coating containing the cross-linking agent and the metal plating layer and the metal plating layer and the organic coating are coupled by a covalent way; and (5) in the technological process, a waste-water and waste-gas purifying device is convenient to arrange and the environmentally-friendly requirements on zero emission are met.

Description

technical field [0001] The invention relates to a coating method, in particular to a coating method replacing electroplating. Background technique [0002] Electroplating is a technology that only appeared after the battery was invented. The British scientist Faraday discovered the law of electrochemical equivalent in 1833, which laid the theoretical foundation for the industrialization of electroplating. The cyanide silver plating process proposed by G.ELKington & H.ELKingtond in Britain in 1840 is considered the beginning of the electroplating industry. Usually electroplating methods are divided into three categories: 1) decorative; 2) protective; 3) functional. The first two types account for about 80% of the electroplating industry. The coating is usually composed of multiple coatings according to technical requirements, and is generally divided into three layers: the bottom layer is copper, the middle layer is nickel, and the surface layer is chromium, called copper / ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C18/31B05D5/00
Inventor 王一建骆剑贾伟郑建宾托马斯·尤尔
Owner HANGZHOU HAIYUAN SURFACE ENG