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Electroplating method for magnesium and magnesium alloy

a technology of electroplating method and magnesium alloy, which is applied in the direction of liquid/solution decomposition chemical coating, coating, metallic material coating process, etc., can solve the problems of affecting the quality of electroplating and difficulty in electroplating magnesium

Inactive Publication Date: 2010-02-04
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

The present patent is about an electroplating method for magnesium and magnesium alloys. The technical effects of the patent include improving the corrosion resistance and metallic appearance of magnesium and magnesium alloys by electroplating them. The method also addresses the challenges of electroplating magnesium and magnesium alloys, such as difficulty in pretreating the substrate and reacting with metal ions in the electrolyte. The method involves a series of steps, including pretreating the substrate, roughening the surface, activating the substrate, and electroplating the substrate to form a nickel coating. The electroplated coating presents good appearance and enhances the corrosion resistance of the substrate.

Problems solved by technology

However, there are some difficulties for electroplating the magnesium and magnesium alloys because they are highly chemically active.
Additionally, during electroplating, magnesium and magnesium alloys tend to react with metal ions contained in electrolytes, which will affect the quality of the electroplating.

Method used

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  • Electroplating method for magnesium and magnesium alloy
  • Electroplating method for magnesium and magnesium alloy

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Embodiment Construction

[0008]Referring to the FIGURE, an electroplating method for magnesium and magnesium alloys may include the steps S10 to S70.

[0009]In step S10, a magnesium or a magnesium alloy substrate is provided. The substrate may be a housing of a mobile phone, a digital camera, a personal digital assistant, or a note-book computer. The substrate may also be a housing of a container.

[0010]In step S20, the substrate is pretreated. The pre-treating step may comprise degreasing and cleaning the substrate. The degreasing process may be carried out by dipping the substrate in a degreasing solution for about 5-15 minutes. The mass concentration of the degreasing solution is about 150-200 grams per liter (g / L). The temperature of the degreasing solution is about 75-90° C. After the degreasing process, the substrate is removed from the degreasing solution and bathed in water. Then, the substrate is dipped in a sodium hydroxide solution for about 4-10 minutes to be polished. The sodium hydroxide solution...

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Abstract

An electroplating method for magnesium and magnesium alloys, comprising: providing a magnesium or magnesium alloy substrate and pre-treating it to be cleaned; roughening the surface of the substrate; activating the surface of the substrate; chemically plating the substrate to form a nickel coating on its surface; and electroplating the substrate to form, in order, a first nickel coating, a copper coating, a second nickel coating, and a chromium coating on the chemically produced nickel coating.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates to an electroplating method for magnesium and magnesium alloys.[0003]2. Description of Related Art[0004]Magnesium and magnesium alloys are prone to corrosion such as galvanic corrosion and therefore, should be surface treated before being used. A typical surface treatment method now for magnesium and magnesium alloys is electroplating. After electroplating, the corrosion resistance and the metallic appearance of the magnesium and magnesium alloys may be greatly improved. However, there are some difficulties for electroplating the magnesium and magnesium alloys because they are highly chemically active. Additionally, during electroplating, magnesium and magnesium alloys tend to react with metal ions contained in electrolytes, which will affect the quality of the electroplating.[0005]Therefore, there is room for improvement within the art.BRIEF DESCRIPTION OF THE DRAWING[0006]Many aspects of the electroplating meth...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25D5/10
CPCC23C18/36C25D3/06C25D3/12C25D3/38C23C18/1653C25D5/42C25D5/48C23C18/1844C25D5/14C25D5/627
Inventor SU, JONG-YICHEN, CHENG-SHINWANG, REN-NINGQU, HONG-JUN
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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