Composite vacuum plating method

A technology of vacuum coating and substrate, applied in vacuum evaporation coating, sputtering coating, ion implantation coating and other directions, can solve the problems of complex process, high processing cost, tedious grinding, etc. The effect of stable chemical properties and good physical properties

Active Publication Date: 2012-03-21
HUZHOU BIAOLI ENERGY SAVING TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The electroplating waste liquid contains a certain amount of toxic and harmful substances, especially cyanide and hexavalent chromium, which need to be treated with three wastes. The treatment process is complicated, the treatment cost is high, and the environmental pollution cannot be completely eliminated;
[0005] (2) The use of ternary plating layer, that is, "copper / nickel / chromium" layer needs to consume a large amount of precious metals such as copper, nickel, chromium, etc.;
[0006] (3) High energy consumption, complicated process, low production efficiency and high cost;
[0007] (4) Poor production conditions have a certain impact on the health of workers
As a protective decorative coating, aluminum alloy and zinc alloy are passive in the atmospheric environment, so the traditional ferrous metal surface treatment technology has poor adhesion on the surface, and it is difficult to achieve a satisfactory protective effect. Before and after vacuum coating, usually use Organic coatings are used for primer and top coating to form a composite coating of "organic coating / vacuum coating / organic coating"
[0010] The applicant disclosed a coating process for aluminum alloy wheels in Chinese patent CN101343740A, which sequentially includes degreasing, cleaning and drying, pretreatment, epoxy polyester powder spraying and curing, grinding I, methyl methacrylate-acrylate copolymerization Paint spraying and curing, grinding II, polybutadiene high-temperature insulating paint spraying and curing, vacuum cathodic arc ion chrome plating and magnetron sputtering aluminum plating, polyurethane acrylate photocuring paint spraying and curing steps, the present invention is compared to the existing Electroplated products simplify the process flow, improve production efficiency, reduce environmental pollution, save energy and water, and improve working conditions. However, due to the porosity of chrome plating, vacuum chrome plating often has poor corrosion resistance, and is different from The bonding during aluminum plating is not good, which affects the quality of the final product, and the present invention requires cumbersome grinding and other processes, and the production efficiency is relatively low

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1As shown, a composite vacuum coating method, taking an aluminum alloy sheet with a product size of 120mm long x 80mm wide x 8mm thick as an example, is described as follows:

[0035] (1) Pre-treat the surface of the aluminum alloy sheet: use a cloth wheel coated with kraft glue to dip in 280# emery to basically flatten the aluminum sheet, and then use a degreasing agent to remove the oil. The degreasing agent can be an alkali metal salt , surfactant, also can be alkali metal alkali and tensio-active agent, can also be alkali metal salt, alkali metal alkali and tensio-active agent, present embodiment uses alkali metal salt, alkali metal alkali and tensio-active agent namely Na 2 CO 3 : 30g / L, Na 3 PO 4 : 30g / L, NaOH: 1g / L, surface sodium lauryl sulfate: 1g / L, after degreasing at 70℃, wash with water, and finally dry;

[0036] (2) Surface spraying and curing: use electrostatic spraying method to spray polyester powder and epoxy resin copolymer coating ...

Embodiment 2

[0049] Such as figure 1 As shown, a composite vacuum coating method, taking a zinc alloy sheet whose product size is 100mm long x 60mm wide x 6mm thick as an example, is explained as follows:

[0050] (1) Pretreat the surface of the zinc alloy sheet: the method is the same as in Example 1, except that the degreasing agent used is K 2 CO 3 : 30g / L, K 3 PO 4 : 30g / L, KOH: 1g / L, fatty acid diethanolamide: 2g / L, degreasing at 50°C;

[0051] (2) Surface spraying and curing: The difference from Example 1 is that the curing temperature is 220°C and the curing time is 30 minutes;

[0052] (3) Composite vacuum coating: Hang the zinc alloy sheet into the vacuum furnace, the target / base distance is 200mm, pre-vacuumize, when the vacuum degree reaches 6.0×10 -3 After Pa, the throttle valve is opened, the workpiece frame rotates at a rate of 3r / min, and the working gas is filled with argon to maintain the vacuum at 0.25Pa. Count 1 piece, the target material is nickel target, the coat...

Embodiment 3

[0062] Such as figure 1 As shown, a composite vacuum coating method, taking the aluminum alloy sheet whose product size is 100mm long x 60mm wide x 6mm thick as an example, the surface spraying and curing, composite vacuum coating, thermosetting coating spraying and curing steps are the same in this embodiment Example 1, the degreaser is Na in the pretreatment step on the surface of the aluminum alloy sheet substrate 2 CO 3 : 50g / L, Sodium Lauryl Sulfate: 1g / L Fatty Acid Diethanolamide: 1 g / L, degreasing at 60°C.

[0063] After the above surface treatment, the main properties of the aluminum alloy sheet coating are as follows:

[0064] (1) Color: bright white;

[0065] (2) Hardness: 1H;

[0066] (3) Adhesion (100 cells): 100%;

[0067] (4) Salt spray resistance (CASS test): ≥120h;

[0068] (5) Heat resistance: 170°C / 2h, no peeling off of the coating, no change point;

[0069] (6) Temperature change resistance: 85°C / 1h→-20°C / 30min is a cycle, after 4 cycles, the coating ...

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Abstract

The invention discloses a composite vacuum plating method and belongs to the technical field of surface treatment. The method comprises steps of surface pretreatment of a base material, surface spraying and solidification, vacuum plating, spraying of thermocuring paint and solidification. The vacuum plating comprises nickel plating through magnetron sputtering, nickel-chromium plating through combination of magnetron sputtering and chrome plating through ion plating and cathode arc ion. The invention omits an onerous furbisher process, simplifies technical flow, increases production efficiency and mitigates labor intensity of workers; secondly, a mixed film plating technology of magnetron sputtering and ion plating is employed that the obtained product film has high film density and strong metal feel; thirdly, preparations of a metal layer and a metal mixed coating are carried out in a same vacuum furnace, so as to facilitate operation, guarantee good bond of the film and enhance product quality.

Description

technical field [0001] The invention relates to a composite vacuum coating method, belonging to the technical field of material surfaces. Background technique [0002] Due to their excellent properties, aluminum alloys and zinc alloys are widely used in aviation, aerospace, construction, mechanical equipment, bridges, vehicles, ships, household appliances, electronic equipment, etc., and play an important role in my country's national economy. With the development of the application of aluminum alloy and zinc alloy, its surface treatment technology is correspondingly in a period of rapid growth, which makes the requirements of aluminum alloy and zinc alloy surface treatment technology more and more high. Over the years, the production technology of ordinary electroplated aluminum alloy and zinc alloy has become mature, with high surface quality, excellent decoration, wear resistance and corrosion resistance. [0003] At present, the electroplating process of aluminum alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/32B05D1/02B05D1/04B05D3/02
Inventor 姚毅汪强王红伟秦洁鲁旭亮吴丽丽
Owner HUZHOU BIAOLI ENERGY SAVING TECH CO LTD
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