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Method for coating double-layer composite film on surface of metal by adopting fully drying method

A metal surface and double-layer composite technology, which is applied to the metal material coating process, the device for coating liquid on the surface, coating, etc., can solve the problem of large amount of metal consumption, lack of metal texture, high water and energy consumption, etc. problem, to achieve the effect of less metal consumption, hard and smooth surface, and improved gloss

Active Publication Date: 2011-10-19
NINGBO RUNNER INDAL CORP
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  • Application Information

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Problems solved by technology

However, the water electroplating process has the following disadvantages: (1) It consumes a lot of water and energy, and produces a large amount 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 methods have serious environmental pollution, and the 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. After that, the fixing frame and the item are directly electrocoated to make the electroplating The surface of the layer forms an acrylic layer with high corrosion resistance, wear resistance and gloss, 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 weather resistance and water resistance are relatively poor
[0006] 3) The outermost layer is organic matter, not a metal film, so the hardness is poor and lacks metal texture
[0007] 4) Primer and topcoat need to be sprayed, the yield rate is not high, and the VOC emission is high, which is not environmentally friendly

Method used

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  • Method for coating double-layer composite film on surface of metal by adopting fully drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 A kind of iron tuyere chrome plating

[0025] 1) Wipe the tuyeres of stamping iron parts with a dry cloth first, then perform flame treatment and then electrostatic dust removal, and the flame treatment time is 2 minutes.

[0026] 2) Spray a layer of 50μm thick thermosetting cross-linked powder coating. Use preheating temperature (120℃×5min), then leveling (150℃×5min), and then curing (180℃×15min).

[0027] 3) Transfer the powder-coated blank into a PVD (Physical Vapor Deposition) furnace for plasma gas activation (conditions: ion source current 0.3A, bias voltage 100V, furnace vacuum pressure 0.2Pa, working gas flow of Ar 2 and O 2 Mixed air flow, mixing ratio 50SCCM: 50SCCM, activation time 5min); then a layer of metal film Cr with a thickness of 0.1 μm is deposited on the paint surface (arc coating conditions: chromium target current 80A, bias voltage 70V, 30SCCM Ar 2 , vacuum pressure 0.2Pa, coating time 1min), followed by a layer of chromium nitride...

Embodiment 2

[0037] Embodiment 2 A kind of stainless steel lock cover is plated imitation gold

[0038] 1) Wipe the stainless steel stamped lock cover with a dry cloth first, then perform flame treatment and then electrostatic dust removal, and the flame treatment time is 3 minutes.

[0039] 2) Spray a layer of 40 μm thick heat-cured cross-linked yellow powder coating. Use preheating temperature (120℃×5min), then leveling (150℃×5min), and then curing (180℃×15min).

[0040] 3) Transfer the powder-coated blank into a PVD (Physical Vapor Deposition) furnace for plasma gas activation (conditions: ion source current 0.3A, bias voltage 100V, furnace vacuum pressure 0.2Pa, working gas flow of Ar 2 and O 2 Mixed air flow, mixing ratio 50SCCM:50SCCM, activation time 5min); then coat a layer of metal film Zr with a thickness of 0.1 μm on the paint surface (arc coating conditions: zirconium target current 120A, bias voltage 70V, 50SCCM Ar 2 , vacuum pressure 0.2Pa, coating time 1min), and then a l...

Embodiment 3

[0049] Embodiment 3 A kind of aluminum alloy imitation nickel color handle

[0050] 1) Wipe the aluminum alloy handle with a dry cloth first, then perform flame treatment and then electrostatic dust removal, and the flame treatment time is 2 minutes.

[0051] 2) Electrophoresis a layer of white paint with a thickness of 30 μm. Use preheating temperature (110℃×5min), then leveling (130℃×5min), and then curing (140℃×20min).

[0052] 3) Transfer the blank of the electrophoretic coating into a PVD (Physical Vapor Deposition) furnace for plasma gas activation (conditions: ion source current 0.3A, bias voltage 100V, vacuum pressure in the furnace 0.2Pa, working gas flow of Ar 2 and O 2 Mixed air flow, mixing ratio 50SCCM:50SCCM, activation time 5min); then coat a layer of metal film Zr with a thickness of 0.1 μm on the paint surface (arc coating conditions: zirconium target current 120A, bias voltage 70V, 50SCCM Ar 2 , vacuum pressure 0.2Pa, coating time 1min), and then a layer o...

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Abstract

The invention discloses a method for coating a double-layer composite film on a surface of metal by adopting a fully drying method, and relates to a surface treatment method for obtaining a composite metal layer on the surface of metal. In the method, a metal blank is cleaned and activated by adopting a drying method; an organic coating is sprayed on the activated metal blank; and the metal blankis put in a physical vapor deposition furnace and plated with a metal ceramic composite film so that a final product is obtained. Proved by tests, the final product not only has the advantages of corrosion resistance, wear resistance, weather resistance, temperature resistance, colorfulness and the like, but also has a hard and smooth surface, and can be on a par with the traditional water (wet method) electroplated metal product in the aspect of quality; and in the method, the procedures of coarsening and activated washing in the traditional water (wet method) electroplating process are eliminated, any harmful electroplating solutions are not used, and especially, toxic hexavalent chromium is not adopted. Simultaneously, in the plating process, the consumption of metal is low, an extremely small amount of waste gas is generated, and no waste water is discharged. The method for coating a double-layer composite film on surface of the metal can be used for improving the function and quality of products with treated metal surface, reducing the production cost, and improving the efficiency; and the whole process flow is completed without using any water, thus water is saved and the environment is protected.

Description

technical field [0001] The invention relates to a surface treatment method for obtaining a metal composite layer on a metal surface, in particular to a surface treatment method for obtaining an appearance imitating water electroplating on a metal surface by using an all-dry method. Background technique [0002] Traditional water (wet) electroplating on the metal surface can obtain products with high anti-corrosion, high wear resistance, high mirror surface and strong decoration. This kind of metal metallization (plating Cu / Ni / Cr metal film) is widely used and has become popular. Long. However, the water electroplating process has the following disadvantages: (1) It consumes a lot of water and energy, and produces a large amount of waste water. (2) Use harmful chemical plating solutions and additives. (3) Emission of toxic waste gas. (4) A large amount of metal is consumed. (5) Use hexavalent chromium which is harmful to human body. Obviously, this traditional craft is q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14C23C14/06
Inventor 吴子豹王应泉李明仁
Owner NINGBO RUNNER INDAL CORP
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