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Electrophoretic coating process for magnesium alloy appearance parts

A technology for electrophoretic coating and appearance parts, which is applied in metal material coating process, electrolytic paint, electrophoretic plating, etc., can solve the problems of heavy weight of appearance parts and difficulty in meeting magnesium alloy appearance parts.

Inactive Publication Date: 2019-04-16
研精舍(上海)精密机械加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of the same appearance effect of the paint surface, compared with electrophoretic coating, the paint surface of spray paint is thicker, and the weight of the exterior parts after painting is larger, which is difficult to meet the demand of "light" and "thin" for magnesium alloy exterior parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An electrophoretic coating process for magnesium alloy exterior parts, comprising the following steps: step a, subjecting the surface of the magnesium alloy exterior parts to micro-arc oxidation treatment to form a ceramic film layer; step b, performing micro-arc oxidation on the surface of the magnesium alloy exterior part ceramic film layer PVD (Physical Vapor Deposition) aluminum plating to form an aluminum film layer; step c, performing AED (anodic electrophoretic coating) process treatment on the magnesium alloy exterior parts, so that the surface of the aluminum film layer is attached with an electrophoretic paint film.

[0047]The AED process in step c includes the following steps: step c1, fix the magnesium alloy appearance part through the clamp on the hanger, and then put the magnesium alloy appearance part in the ultrasonic degreasing tank for 4 minutes, and the temperature in the ultrasonic degreasing tank is controlled at 60 °C ; step c2, washing the magnesi...

Embodiment 2

[0053] An electrophoretic coating process for magnesium alloy appearance parts, comprising the following steps,

[0054] In step a, micro-arc oxidation treatment is carried out on the surface of the magnesium alloy appearance part to form a ceramic film layer; in step b, PVD (physical vapor deposition) aluminum plating is performed on the surface of the magnesium alloy appearance part ceramic film layer to form an aluminum film layer; in step c, AED (anodic electrophoretic coating) process is carried out on the magnesium alloy exterior parts to make the surface of the aluminum film layer adhere to the electrophoretic paint film.

[0055] The AED process in step c includes the following steps: step c1, fix the magnesium alloy appearance part through the clamp on the hanger, and then put the magnesium alloy appearance part into the ultrasonic degreasing tank for degreasing for 5 minutes, and the temperature in the ultrasonic degreasing tank is controlled at 65 °C ; step c2, wash...

Embodiment 3

[0061] An electrophoretic coating process for magnesium alloy exterior parts, comprising the following steps: step a, subjecting the surface of the magnesium alloy exterior parts to micro-arc oxidation treatment to form a ceramic film layer; step b, performing micro-arc oxidation on the surface of the magnesium alloy exterior part ceramic film layer PVD (Physical Vapor Deposition) aluminum plating to form an aluminum film layer; step c, performing AED (anodic electrophoretic coating) process treatment on the magnesium alloy exterior parts, so that the surface of the aluminum film layer is attached with an electrophoretic paint film.

[0062] The AED process in step c includes the following steps: step c1, fix the magnesium alloy appearance part through the clamp on the hanger, and then put the magnesium alloy appearance part in the ultrasonic degreasing tank for 3 minutes to degrease, and the temperature in the ultrasonic degreasing tank is controlled at 55 ℃ ; step c2, washing...

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Abstract

The invention relates to an electrophoretic coating process, in particular to an electrophoretic coating process for magnesium alloy appearance parts. The process comprises the following steps: (a) the micro-arc oxidation is performed on the surfaces of the magnesium alloy appearance parts to form ceramic film layers; (b) the PVD (physical vapor deposition) aluminum plating is performed on the surfaces of the ceramic film layers of the magnesium alloy appearance parts to form aluminum film layers; and (c) the AED (anode electrophoretic coating) treatment is performed on the magnesium alloy appearance parts to attach electrophoretic paint films on the surfaces of the aluminum film layers. The magnesium alloy appearance parts are generally applied to such mobile equipment as notebook computers, tablet computers and mobile phones. The micro-arc oxidation and the PVD aluminum plating are both traditional technologies. Aluminum is continuously plated on the compact ceramic films formed on the surfaces of the magnesium alloy appearance parts after micro-arc oxidation, so that the uniform surface electric conductivity of the appearance parts is achieved, and the appearance parts are coated by adopting an electrophoretic mode.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an electrophoretic coating process. Background technique [0002] Electrophoretic paint coating is a process in which charged colloidal particles are deposited on the metal surface through the action of a direct current electric field. After the power is turned on, when the colloidal particles are positively charged, they are deposited on the surface of the cathode, which is the cathodic electrophoretic paint. Conversely, when the colloidal particles are negatively charged, they are deposited on the surface of the anode, which is called anodic electrophoretic paint. [0003] Compared with conventional spray paint, electrophoretic paint coating has the following advantages: (1) The film thickness of electrophoretic paint coating is easy to control; (2) For parts with complex shapes, the inner and outer surfaces of the shell, the sharp angles and sharp Electrophor...

Claims

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Application Information

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IPC IPC(8): C25D11/30C23C28/00C25D11/02C25D13/04C25D13/20
CPCC23C28/322C23C28/345C25D11/026C25D11/30C25D13/04C25D13/20
Inventor 庄昆仑
Owner 研精舍(上海)精密机械加工有限公司
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