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Protective and decorative yellow ceramic layer on magnesium alloy surface and preparation method thereof

A technology of ceramic layer and magnesium alloy, which is applied in the field of both protective and functional coatings on metal surfaces, can solve the problems of monotonous micro-arc oxidation coating color, unstable and safety hazards in the preparation process of yellow micro-arc oxidation ceramic layers, etc., and achieve enhanced Good protection performance and stability

Inactive Publication Date: 2017-05-31
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical purpose of the present invention is to provide a magnesium alloy surface with both protective and And a decorative yellow ceramic layer and a preparation method thereof, the ceramic layer has relatively excellent protective properties, and at the same time has an adjustable yellow color of the ceramic layer, which can promote the application of magnesium alloy as a substrate in the field of 3C and decoration

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  • Protective and decorative yellow ceramic layer on magnesium alloy surface and preparation method thereof
  • Protective and decorative yellow ceramic layer on magnesium alloy surface and preparation method thereof
  • Protective and decorative yellow ceramic layer on magnesium alloy surface and preparation method thereof

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Embodiment 1

[0032] In this embodiment, the surface of the magnesium alloy is a light yellow micro-arc oxidation ceramic layer, that is, the micro-arc oxidation ceramic layer is prepared by adding a small amount of sodium stannate electrolyte, so that the surface layer of the magnesium alloy substrate is formed in situ. Magnesium oxide porous membrane, the thickness of the ceramic layer is 10 μm.

[0033] The preparation method of the yellow micro-arc oxidation ceramic layer on the surface of the magnesium alloy comprises the following steps:

[0034] Step 1: The wire-cut magnesium alloy samples are firstly subjected to degreasing and degreasing processes, then ground with different water sandpapers, and then washed with water after polishing to prepare for micro-arc oxidation treatment.

[0035] Step 2: Select chemical reagents according to the matching principle of magnesium alloy micro-arc oxidation electrolyte, prepare stannate-based micro-arc oxidation electrolyte, wherein the concent...

Embodiment 2

[0039] In this example, the surface of the magnesium alloy is a yellow micro-arc oxidation ceramic layer, that is, the micro-arc oxidation ceramic layer is prepared by adding a relatively large amount of sodium stannate electrolyte, so that the surface layer of the magnesium alloy substrate is formed in situ and doped with a relatively large amount of Sn elements. MgO porous membrane, the thickness of the ceramic layer is 15 μm.

[0040] The preparation method of the yellow micro-arc oxidation ceramic layer on the surface of the magnesium alloy comprises the following steps:

[0041] Step 1: The wire-cut magnesium alloy samples are firstly subjected to degreasing and degreasing processes, then ground with different water sandpapers, and then washed with water after polishing to prepare for micro-arc oxidation treatment.

[0042] Step 2: Select chemical reagents according to the matching principle of magnesium alloy micro-arc oxidation electrolyte, prepare stannate-based micro-...

Embodiment 3

[0046] In this embodiment, the surface of the magnesium alloy is a deep yellow micro-arc oxidation ceramic layer, that is, the micro-arc oxidation ceramic layer is prepared in the electrolyte of adding more sodium stannate, so that the surface layer of the magnesium alloy matrix is ​​formed in situ. Magnesium oxide porous membrane of Sn element, the thickness of the ceramic layer is 20 μm.

[0047] The preparation method of the yellow micro-arc oxidation ceramic layer on the surface of the magnesium alloy comprises the following steps:

[0048] Step 1: The wire-cut magnesium alloy samples are firstly subjected to degreasing and degreasing processes, then ground with different water sandpapers, and then washed with water after polishing to prepare for micro-arc oxidation treatment.

[0049] Step 2: Select chemical reagents according to the matching principle of magnesium alloy micro-arc oxidation electrolyte, prepare stannate-based micro-arc oxidation electrolyte, wherein the c...

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Abstract

The invention discloses a protective and decorative yellow ceramic layer on a magnesium alloy surface and a preparation method thereof. The protective and decorative yellow ceramic layer is formed in the way that metal elements in a coloring agent are doped with MgO; and the content of the coloring agent in a micro-arc oxidation electrolyte and electric parameters (mainly including voltage and oxidation time) are regulated and controlled to regulate and control the content of the metal elements doped in a micro-arc oxidation ceramic layer so as to form a MgO yellow micro-arc oxidation ceramic layer with controllable doping content, the doping content of the metal elements is 0.5-10 at.%, the thickness of the ceramic layer is 5-30 [mu]m, and the yellow color is deepened with increase of the doping content. Compared with an existing yellow micro-arc oxidation ceramic layer on the magnesium alloy surface, the protective and decorative yellow ceramic layer on the magnesium alloy surface has the advantages that the process problems of poor solution stability and existence of safety hazards are solved, and particularly, the dark yellow micro-arc oxidation ceramic layer has more excellent protective performance than a traditional white micro-arc oxidation ceramic layer, therefore is more suitable for industrial popularization, and can be applied in the fields of 3C and decoration.

Description

[0001] 1. Technical field [0002] The invention relates to the technical field of protective and functional coatings on metal surfaces, in particular to a yellow ceramic layer with both protection and decoration on the surface of a magnesium alloy and a preparation method thereof. [0003] 2. Background technology: [0004] The advantages of magnesium metal, such as light specific gravity, good ductility, and strong environmental performance, have attracted widespread attention in the traditional industrial field, making it gradually become the new favorite in structural and functional materials, and is increasingly being used by ordinary people. life, such as the wide application on 3C products. However, the application of magnesium alloys in products is limited. The main reason is that the chemical properties of magnesium are very active. The standard electrode potential of magnesium is -2.37V, which is lower than that of most commonly used metals. When it is in contact wit...

Claims

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Application Information

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IPC IPC(8): C25D11/30
CPCC25D11/30C25D11/024
Inventor 杨巍高羽王建利徐大鹏田沙陈建
Owner XIAN TECHNOLOGICAL UNIV
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