Preparation method of Al-Mn alloy prevention plating layer on surface of metallic matrix

An al-mn and alloy technology, which is applied in the field of preparation of ionic liquid electrodeposited Al-Mn alloy protective coating on the surface of metal substrates, can solve the problems of high cost, high energy consumption, corrosion of containers, etc.

Inactive Publication Date: 2013-05-15
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have defects such as complicated pro...

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  • Preparation method of Al-Mn alloy prevention plating layer on surface of metallic matrix
  • Preparation method of Al-Mn alloy prevention plating layer on surface of metallic matrix
  • Preparation method of Al-Mn alloy prevention plating layer on surface of metallic matrix

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preparation example Construction

[0074] Preparation of Al-Mn Alloy Protective Coating

[0075] The invention provides a method for preparing an Al-Mn alloy protective coating by an electroplating process, the method comprising:

[0076] The electroplating solution prepared by the above method is used as a plating solution, a metal substrate is used as a cathode, and a high-purity aluminum is used as an anode to form an electroplating system, and an Al-Mn alloy protective coating is obtained by electrodeposition.

[0077] The metal matrix is ​​not particularly limited, and is generally an active metal or alloy that is difficult to plate, preferably selected from the following group: NdFeB permanent magnet, magnesium alloy, lithium alloy, and aluminum alloy.

[0078] Preferably, the plating solution is heated and stirred before electroplating.

[0079] Before electroplating, a certain pretreatment can be optionally performed on the metal substrate to improve the bonding force between the plating layer and the substrate. ...

Embodiment 1

[0095] Example 1: Preparation of Al-Mn alloy protective coating on the surface of NdFeB magnet

[0096] In Example 1, the metal matrix is ​​a sintered NdFeB magnet, and the ionic liquid is aluminum chloride (AlCl 3 )-BMIC (1-butyl-3-methylimidazole chloride), add anhydrous manganese chloride (MnCl 2 ), stir to dissolve, and electrodeposit on the surface of the NdFeB magnet to obtain an Al-Mn alloy protective coating.

[0097] The specific preparation method of the Al-Mn alloy protective coating obtained by electrodeposition of the ionic liquid on the surface of the NdFeB magnet includes the following steps.

[0098] (1) Preparation of ionic liquid

[0099] Ready to configure aluminum chloride (AlCl 3 )-BMIC (1-butyl-3-methylimidazole chloride) instruments: jars, beakers, keys, electronic scales, glass rods and magnets. All equipment must be completely dried and placed in the glove box. Weigh BMIC (1-butyl-3-methylimidazole chloride) in a jar in the glove box, and then weigh aluminum ...

Embodiment 2

[0109] Example 2: Electroplating effect under different electroplating solution concentration conditions

[0110] In Example 2, the metal matrix is ​​a sintered NdFeB magnet, and the ionic liquid is aluminum chloride (AlCl 3 )-BMIC (chlorinated 1-butyl-3-methylimidazole), which is basically the same as the steps in Example 1. In step (3) electrodeposition of Al-Mn alloy coating, weigh 1.573g of anhydrous chlorinated Manganese (MnCl 2 ) Add to 50ml ionic liquid and stir to dissolve to form a 0.25mol / L plating solution.

[0111] The surface morphology of the Al-Mn alloy coating obtained by electrodeposition is as attached image 3 As shown, the surface is uniform and dense, which is brighter than the surface of the plating layer in Example 1. However, because the surface morphology was observed under high magnification, microscopic cracks were generated, resulting in its corrosion resistance inferior to the alloy coating prepared in Example 1.

[0112] The corrosion resistance test re...

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Abstract

The invention provides a preparation method of an Al-Mn alloy prevention plating layer on the surface of a metallic matrix. Specifically, the invention provides a preparation method of an Al-Mn alloy prevention plating layer on the surface of the metallic matrix by utilizing an ion liquid through electro-depositing. The Al-Mn alloy prevention plating layer can be obtained from electro-deposition in a room temperature ion liquid system. An electroplating liquid is formed by preparing R1R2IC, AlCl3 and MnCl2. Compared with originally electro-depositing a metallic prevention plating layer in a water solution, the prevention plating layer is more compact and smoother, and is better combined with the matrix, the corrosion resistance property is obviously improved, and the properties are superior to those of the ion liquid-electro-deposited pure aluminum prevention plating layer. In addition, the ion liquid is not burnt and evaporated, can be repeatedly used, is incapable of producing electroplating waste water, and is green and environment-friendly.

Description

Technical field [0001] The invention relates to the field of metal material surface coating protection, in particular, the invention provides a preparation method for electrodepositing an Al-Mn alloy protection coating on the surface of a metal substrate by an ionic liquid. Background technique [0002] NdFeB, as the third-generation rare earth permanent magnet material, has been widely used in the energy, automobile, home appliances and computer industries due to its good magnetic properties and abundant resource reserves since its inception in the 1980s. However, the surface of the NdFeB permanent magnet is loose and porous, and there is a very active neodymium-rich phase at the intersection of the grain boundary or the main phase grain boundary. Therefore, the corrosion resistance of the NdFeB magnet is very poor, which limits its application. Therefore, improving the corrosion resistance of NdFeB magnets has become a problem that must be solved in the process of its practical...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor 宋振纶余静冒守栋郑必长姜建军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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