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Preparation method of magnesium alloy surface micro-arc oxidation-electrophoresis composite coating

A composite coating and micro-arc oxidation technology, which is applied in metal material coating process, coating, anodic oxidation, etc., can solve the problem of low bonding strength between hydroxyapatite coating and metal surface, and achieve the purpose of suppressing arc discharge, Improve biological activity and reduce the effect of pore size

Active Publication Date: 2015-05-13
哈尔滨规格科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the electrochemical deposition process, conditions such as electrolyte temperature, substrate, and electrolyte composition will affect the composition, structure, and surface morphology of the electrochemically deposited calcium-phosphorus product, so there will also be hydroxyapatite coating and Problems such as low bonding strength of metal surface

Method used

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  • Preparation method of magnesium alloy surface micro-arc oxidation-electrophoresis composite coating
  • Preparation method of magnesium alloy surface micro-arc oxidation-electrophoresis composite coating
  • Preparation method of magnesium alloy surface micro-arc oxidation-electrophoresis composite coating

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Embodiment approach 1

[0021] 1. Preparation of electrolyte: Weigh raw materials of sodium aluminate or potassium aluminate 20g / l, sodium hydroxide or potassium hydroxide 3g / l, hydrogen peroxide 2ml / l, glycerol 3ml / l, sodium lactate 5ml / l , and dissolved in deionized water in turn to obtain an electrolyte for later use.

[0022] 2. Preparation of electrophoretic suspension: First, weigh 10g / l of hydroxyapatite (HA), 10ml / l of polyethylene glycol, and 2g / l of cerium nitrate, dissolve them in deionized water in turn, and adjust the pH value to 4. Then perform ultrasonic treatment for 2 hours, and finally stir for 24 hours to obtain an electrophoretic suspension for use.

[0023] 3. Preparation of the micro-arc oxidation film on the surface of the magnesium alloy: pretreatment will be carried out (the pretreatment process means that the magnesium alloy raw material is polished and polished successively with 400, 1200, and 2000 mesh sandpaper, and then cleaned with deionized water, acetone or ethanol A...

Embodiment approach 2

[0036] The difference between this embodiment and embodiment one is that in step one, the electrolyte is composed of potassium hydroxide with a concentration of 3g / l, hydrogen peroxide at 2ml / l, glycerol at 3ml / l, sodium lactate at 8ml / l, and 20g / l l made of sodium aluminate. Other steps and process parameters are the same as the first embodiment.

Embodiment approach 3

[0038] The difference between this embodiment and the specific embodiment one is that in step one, the electrolyte is composed of potassium hydroxide with a concentration of 3g / l, hydrogen peroxide of 2ml / l, glycerol of 2ml / l, sodium lactate of 4.5ml / l and 25g / l sodium aluminate. Other steps and process parameters are the same as the first embodiment.

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Abstract

The invention discloses a preparation method of a magnesium alloy surface micro-arc oxidation-electrophoresis composite coating, and belongs to the field of magnesium alloy surface treatment. The preparation method is used for solving problems of conventional magnesium alloy that biological activity is poor, and bonding force with composite membrane is low. According to the preparation method, micro-arc oxidation is adopted so as to form a micro-arc oxidized ceramic coating on magnesium alloy surface, and a composite coating with biological activity is obtained via electrophoresis treatment using a pulsed power supply; and a used electrophoretic liquid is composed of one compound selected from hydroxyapatite, acetic acid, and absolute ethyl alcohol or polyethylene glycol, and one compound selected from lanthanum nitrate or cerous nitrate. Ideal combination of micro-arc oxidation with pulse electrophoresis is realized; compounds such as hydroxyapatite are introduced onto the surface of magnesium alloy; and electrophoresis treatment is used for hole sealing of holes of the micro-arc oxidized ceramic coating so as to improve biological activity and corrosion resistance of magnesium alloy, and bonding strength is relatively high.

Description

technical field [0001] The invention relates to a method for preparing a micro-arc oxidation-electrophoresis composite coating on an alloy surface. The composite coating thus prepared has good corrosion resistance and wear resistance, and is expected to become a novel biomedical material. Background technique [0002] Magnesium and magnesium alloy-based biomaterials are the most likely to become the next generation of metal-based human implant materials. The density and Young's modulus of magnesium metal are close to those of human bone, which can avoid the stress shielding effect; magnesium is an indispensable element in the human body, and its content is second only to calcium, sodium and potassium. At the same time, magnesium is also the main component of bone, which can promote Bone, tooth and cell formation, and play an important role in the regulation of bone mineral metabolism. Even if magnesium ions are generated in human body fluids, they can be absorbed by surroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23C14/06C23C14/28C23C8/24A61L27/32A61L27/30A61L27/56
CPCA61L27/047A61L27/306A61L27/32A61L27/54A61L27/56A61L2420/02A61L2420/06A61L2420/08A61L2430/02C23C28/04C25D11/30C25D13/02
Inventor 常立民田利丰刘伟
Owner 哈尔滨规格科技有限公司
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