Composite zinc alloy film coating process

A technology of vacuum coating and emery, applied in metal material coating process, sputtering coating, ion implantation coating, etc., can solve the problems of not completely eliminating environmental pollution, poor corrosion resistance of vacuum chrome plating, affecting the quality of final products, etc. , to achieve the effect of eliminating the polishing process, strong metallic feeling and bright white surface

Inactive Publication Date: 2014-03-26
WUXI HUIMING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (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;
[0006] (2) The use of a ternary coating layer, that is, a "copper / nickel / chromium" layer, requires the consumption of a large amount of precious metals such as copper, nickel, chromium; (3) high energy consumption, complicated process, low production efficiency and high cost;
[0007] (4) The production conditions are poor, which has a certain impact on the health of workers
[0010] and magnetron sputtering aluminum plating, polyurethane acrylate photocuring paint spraying and curing steps, the present invention simplifies the process flow, improves production efficiency, reduces environmental pollution, and saves energy and water compared to the existing electroplating products And improved working conditions, but because chromium plating has porosity, vacuum chromium plating often has poor corrosion resistance, and it is not good to combine with aluminum plating, thereby affecting the final product quality, and the present invention needs tedious operations such as grinding, Relatively low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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:

[0033] (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 : 30glL, Na 3 PO 4: 30glL, NaOH: 1glL, surface sodium lauryl sulfate: 1g / L, after degreasing at 70°C, rinse with water, and finally dry;

[0034] (2) Surface spraying and curing: use the electrostatic spraying method to spray polyester powder and epoxy resin co-coating on the pretreated workpiece a...

Embodiment 2

[0047] A kind of compound vacuum coating method, take the zinc alloy sheet that the product size is long 100mm * wide 60mm * thick 6mm as an example to illustrate as follows:

[0048] (1) The surface of the zinc alloy sheet is pretreated: 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;

[0049] (2) Surface spraying and curing: the difference from Example 1 is that the curing temperature is 220°C, and the curing time is 30min;

[0050] (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 6.0×10-3Pa, the throttle valve is opened, and the workpiece rack is 3r / min Rotate at a high speed, fill in the working gas argon, maintain the vacuum at 0.25Pa, first turn on the magnetron sputtering power supply, the voltage is 450V, the current is 20A...

Embodiment 3

[0060] A composite vacuum coating method, taking an aluminum alloy sheet with a product size of 100 mm long x 60 mm wide x 6 mm thick as an example, the steps of surface spraying and curing, composite vacuum coating, thermosetting coating spraying and curing in this embodiment are the same as in embodiment 1 , the degreaser in the pretreatment step of the surface of the aluminum alloy sheet substrate is Na 2 CO 3 : 50glL, sodium lauryl sulfate: 1glL fatty acid diethanolamide: 1g / L, degreasing at 60°C.

[0061] After the above surface treatment, the main properties of the aluminum alloy sheet coating are as follows:

[0062] (1) Color: bright white;

[0063] (2) Hardness: 1H:

[0064] (3) Adhesion (100 cells): 100%;

[0065] (4) Salt spray resistance (CASS test): ≥120h;

[0066] (5) Heat resistance performance: 170°C for 12 hours, the coating does not fall off, and there is no change point:

[0067] (6) Temperature change resistance: 85°C / 1h--20°C / 30min is a cycle, and af...

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Abstract

The invention discloses a composite zinc alloy film coating process, and belongs to the technical field of surface treatment. The process sequentially comprises the steps of substrate surface pre-treatment, surface spraying and curing, vacuum film coating and heat-curable coating spraying and curing, wherein the vacuum film coating step comprises magnetron sputtering nickel plating, magnetron sputtering-ion plating mixed nickel-chromium plating and cathodic arc ion chromium-plating. According to the process, a heavy polishing procedure is eliminated, the process flow is simplified, the production efficiency is improved, and the labor intensity of a worker is reduced; in addition, a magnetron sputtering-ion plating mixed film coating technology is adopted, and an obtained product is high in film layer density and highly metallic; moreover, a metal layer and a metal mixed coating are prepared in the same vacuum furnace, so that the process is easy to operate, high bonding force of a film layer is ensured, and the quality of the product is improved.

Description

technical field [0001] The invention relates to a composite zinc alloy vacuum coating process, belonging to the technical field of material surfaces. Background technique [0002] With its excellent characteristics, 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 zinc alloy application, its surface treatment technology is correspondingly in a period of rapid growth, which makes the requirements for aluminum alloy and zinc alloy surface treatment technology higher and higher. Over the years, the production technology of ordinary electro-galvanized alloys has become mature, with high surface quality, excellent decoration, wear resistance and corrosion resistance. [0003] At present, the electroplating process of zinc alloy is wet electroplating: blank-inspection-degreasing-clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16C23C14/35C23C14/02C23C14/58
Inventor 袁萍
Owner WUXI HUIMING ELECTRONICS TECH
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