Preparation method of anti-corrosion and anti-friction synergistic coating on the surface of light alloy and composite material

A composite material and light alloy technology, applied in the field of material engineering, can solve problems such as few reports, and achieve the effects of good corrosion resistance, process stability and simplified process

Active Publication Date: 2017-10-20
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The research status at home and abroad shows that the existing Concorde coating preparation methods mainly use anodic oxidation, electroplating, chemical plating and other methods for the base layer, and the introduction of functional substances usually uses hot dipping, spraying, physical vapor deposition, and electrolysis. However, there are few reports on the preparation of Concorde coatings by plasma electrolytic oxidation composite electrodeposition technology.

Method used

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  • Preparation method of anti-corrosion and anti-friction synergistic coating on the surface of light alloy and composite material
  • Preparation method of anti-corrosion and anti-friction synergistic coating on the surface of light alloy and composite material
  • Preparation method of anti-corrosion and anti-friction synergistic coating on the surface of light alloy and composite material

Examples

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Effect test

Embodiment 1

[0035] Embodiment 1: A method for preparing a corrosion-resistant and wear-reducing Concord coating on the surface of a magnesium alloy, comprising the following steps:

[0036] Pretreatment: The magnesium alloy sample was first polished with sandpaper, then cleaned with acetone, and finally rinsed with deionized water for later use. Then complete the preparation in the following steps:

[0037] The first step: prepare a porous base layer on the surface of the magnesium alloy sample by plasma electrolytic oxidation:

[0038]First prepare the electrolyte according to sodium silicate 5g / L, sodium hydroxide 1g / L, potassium fluoride 5 g / L, and hydrogen peroxide 3ml / L, and the solvent is deionized water; then import the above electrolyte into the stainless steel tank as the cathode , the magnesium alloy sample was used as the anode, and the porous base layer was prepared by plasma electrolytic oxidation treatment on the magnesium alloy sample by means of DC pulse power output. Th...

Embodiment 2

[0044] Embodiment 2: A method for preparing a corrosion-resistant and wear-reducing Concord coating on the surface of an aluminum alloy, comprising the following steps:

[0045] Pretreatment: The aluminum alloy sample was first polished with sandpaper, then cleaned with acetone, and finally rinsed with deionized water for later use.

[0046] The first step: prepare a porous base layer on the surface of the aluminum alloy sample by plasma electrolytic oxidation:

[0047] First prepare the electrolyte according to potassium silicate 15g / L, potassium hydroxide 2g / L, potassium fluoride 10 g / L, and hydrogen peroxide 5ml / L, and the solvent is deionized water; then import the above electrolyte into the stainless steel tank as the cathode , the aluminum alloy sample was used as an anode, and the porous base layer was prepared by plasma electrolytic oxidation treatment on the aluminum alloy sample by means of DC pulse power output. The conditions for plasma electrolytic oxidation trea...

Embodiment 3

[0052] Embodiment 3: A method for preparing a corrosion-resistant and wear-reducing Concord coating on the surface of a magnesium-based alloy, comprising the following steps:

[0053] Pretreatment: The magnesium-based composite material sample was first polished with sandpaper, then cleaned with acetone, and finally rinsed with deionized water for later use.

[0054] The first step: prepare a porous base layer on the surface of the magnesium-based composite material sample by plasma electrolytic oxidation:

[0055] First prepare the electrolyte according to sodium silicate 20g / L, sodium hydroxide 3g / L, potassium fluoride 15 g / L, hydrogen peroxide 10ml / L, and the solvent is deionized water; then import the above electrolyte into the stainless steel tank as the cathode , the magnesium-based composite material sample was used as an anode, and the porous base layer was prepared by plasma electrolytic oxidation treatment on the magnesium-based composite material sample by means of ...

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Abstract

The invention relates to a preparation method of a corrosion-resistant wear-resistant synergistic coating for the surfaces of a light alloy and a composite material. The preparation method comprises 1, preparing a porous base layer on the surface of an alloy sample through a plasma electrolytic oxidation method, 2, carrying out fluoropolymer coating cathode electro-deposition on the surface of the alloy sample through a constant current method and 3, putting the alloy sample into a vacuum drying box and carrying out thermal insulation for some time so that the coating and the base are completely fused and the synergistic coating is formed. A lot of the fluoropolymer permeating into holes of the base film and the ceramic base layer produce synergism so that the synergistic self-lubricating coating with high wear resistance and low friction coefficient i.e. good wear resistance is obtained. The used solution is suitable for the surface of a part which works in various climates and environments and has requirements of wear resistance, corrosion resistance and contains simple components. The coating can be prepared through simple processes and is suitable for surfaces with various sizes and complex shapes. The preparation method can be operated and controlled easily, has process stability and high treatment efficiency and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of material engineering, and in particular relates to a method for preparing a corrosion-resistant and friction-reducing synergistic coating on the surface of light alloys and composite materials. Background technique [0002] Light alloys such as aluminum, magnesium, and titanium are widely used in aerospace industry, transportation, optical instruments, electronics industry, automobile manufacturing, electronic communications, notebook computers, military and other industrial sectors due to their excellent performance. Light alloys will be more and more widely used in vehicles such as automobiles due to the increasing requirements for light weight of walking machinery such as motorcycles, energy saving, consumption reduction, emission reduction and environmental protection. However, the anti-friction properties of aluminum, magnesium, and titanium and the outstanding corrosion resistance of magnesium alloys limit th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/02
CPCC25D11/02
Inventor 王萍李建平马群郭永春杨忠王建利马志军白亚平夏峰高培虎
Owner XIAN TECH UNIV
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