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Aluminum alloy surface coating and method for forming coating

A kind of aluminum alloy surface and aluminum alloy technology, which is applied in the direction of surface coating liquid device, coating, special surface, etc., can solve the problems of complex equipment, long process route, large space occupation, etc., and achieve obvious metallic feeling and solve the problem of The effect of long process route and reduced floor space

Inactive Publication Date: 2017-02-22
CITIC DICASTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has a long process route, complicated equipment, and takes up a lot of space.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A new coating process for aluminum alloy wheels, the basic process route is as follows:

[0037] (1) provide the aluminum alloy surface of the wheel hub; (2) pretreat the aluminum alloy surface, and dry it; (3) spray the color base powder on the surface obtained in step (2) and solidify it, and the thickness of the powder sprayed 100-120 microns, the curing temperature is 160 degrees Celsius, and the curing time is 20 minutes; (4) the surface obtained in step (3) is sprayed with transparent powder and cured, and the powder spraying thickness is 80 microns, and the curing temperature is 180 degrees Celsius. The time is 20 minutes.

[0038] The aluminum alloy wheel hub produced by this process has a slight orange peel phenomenon in the back cavity of the hub, and there is no defect in other positions. According to the aluminum alloy wheel appearance standard GM9591083 of the general company wheel system, the composite appearance standard is judged.

Embodiment 2

[0040] A new coating process for aluminum alloy wheels, the basic process route is as follows:

[0041] (1) provide the aluminum alloy surface; (2) pretreat the aluminum alloy surface and dry it; (3) spray the color base powder on the surface obtained in step (2) and solidify, and the powder spraying thickness is 160-200 microns, the curing temperature is 220 degrees Celsius, and the curing time is 10 minutes; (4) the surface obtained in step (3) is sprayed with transparent powder and cured, the powder spraying thickness is 130-160 microns, and the curing temperature is 220 degrees Celsius, The curing time was 10 minutes. The article number of the color base powder used is 10363.

[0042] The aluminum alloy wheels produced by this process have a slight sagging phenomenon at the outer rim, and there are no defects in other positions. According to the appearance standard GM9591083 of the aluminum alloy wheel of the general company wheel system, the composite appearance standard...

Embodiment 3

[0044] A new coating process for aluminum alloy wheels, the basic process route is as follows:

[0045](1) provide the aluminum alloy surface; (2) pretreat the aluminum alloy surface and dry it; (3) spray the color base powder on the surface obtained in step (2) and solidify, and the powder spraying thickness is 120-160 microns, the curing temperature is 200 degrees Celsius, and the curing time is 14 minutes; (4) the surface obtained in step (3) is sprayed with transparent powder and cured, the powder spraying thickness is 100-130 microns, and the curing temperature is 200 degrees Celsius, The curing time was 14 minutes. The article number of the color base powder used is 10363.

[0046] The aluminum alloy wheels produced by this process have no defects in the front, window, back cavity, etc. According to the appearance standard GM9591083 of the aluminum alloy wheel of the general company wheel system, the composite appearance standard is judged.

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Abstract

The invention provides an aluminum alloy surface coating and a preparation method thereof. The aluminum alloy surface coating comprises an aluminum alloy matrix, a colorful bottom powder layer and a transparent powder layer in turn, wherein the resin bottom powder is arranged on the colorful bottom powder layer; the thickness of the colorful bottom powder layer is 50-300 microns; the resin bottom powder is arranged on the transparent powder layer; the thickness of the transparent powder layer is 50-350 microns; the colorful bottom powder layer is composed of resin, auxiliaries, pigment, padding and metal powder; and / or the transparent powder layer is composed of resin, auxiliaries and curing agent. Through the spray coating of the colorful bottom powder, the paint spraying process is avoided; the functions of covering the workpiece surface defects and acquiring elegant appearance color can be realized; the intrinsic problems of long process route and long production period of the traditional technique can be solved. The aluminum alloy surface coating is capable of greatly increasing the production efficiency, reducing the material and labor cost, reducing the pollutant emission, shortening the spray coating line, reducing the floor area of the spray coating workshop, protecting the environment and easily realizing industrial large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment methods, in particular to an aluminum alloy surface coating and a method for forming the coating. Background technique [0002] Coating is an important process to ensure that the wheel hub has excellent corrosion resistance and good appearance. The traditional aluminum alloy wheel coating process includes three processes: pretreatment, powder spraying and painting. Among them, the purpose of the pretreatment process is to remove the oil and scale on the surface of the aluminum alloy and provide a film layer with good bonding force with the powder. The purpose of the powder spraying process is to make up for the slight defects on the surface of the workpiece and ensure the smoothness of the overall appearance of the workpiece. Exquisite appearance can be obtained by spraying different paints. [0003] The general process of traditional painting is: material hub→pretreatment→drying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D7/00B05D5/06B05D3/02
CPCB05D7/14B05D3/0254B05D5/06B05D7/534B05D2202/25
Inventor 朱志华张胜超杜云鹏
Owner CITIC DICASTAL
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