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Preparation method of medical magnesium alloy surface nanoscale corrosion-resistant and biocompatible composite coating

A biocompatible, composite coating technology, applied in surface reactive electrolytic coatings, coatings, pharmaceutical formulations, etc., to achieve the effects of increasing surface wettability, promoting fracture healing, and excellent biosafety

Inactive Publication Date: 2020-06-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Micro-arc oxidation can prepare a dense, uniform chemical composition and high-strength film on the surface, but some micropores will be formed during the discharge, melting and sintering process, so it is necessary to further increase the corrosion resistance

Method used

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  • Preparation method of medical magnesium alloy surface nanoscale corrosion-resistant and biocompatible composite coating
  • Preparation method of medical magnesium alloy surface nanoscale corrosion-resistant and biocompatible composite coating
  • Preparation method of medical magnesium alloy surface nanoscale corrosion-resistant and biocompatible composite coating

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Effect test

Embodiment 1

[0034] The invention provides a method for preparing a nanoscale corrosion-resistant and biocompatible composite coating on the surface of a medical magnesium alloy, which comprises the following steps:

[0035] (1) Pretreatment: First, the medical Mg-Zn-Y-Nd-Zr alloy obtained by smelting is first heat-treated and extruded to obtain a rod, and the rod is cut into a cylindrical block of Ф9mm×7mm, and 100#, 200#, 400#, 600#, 800# and 1000# metallographic sandpapers were used to mechanically grind and polish the surface in turn, and ultrasonically cleaned in absolute ethanol for 5 minutes to remove surface impurities, and then air-dried naturally after taking it out;

[0036] (2) The configuration of the micro-arc oxidation electrolyte and the configuration of the electrodeposition electrolyte:

[0037] Configuration of micro-arc oxidation electrolyte: the micro-arc oxidation electrolyte contains Na 3 PO 4 、Na 2 SiO 3 , KOH and glycerol in aqueous solution, Na in a magnetical...

Embodiment 2

[0046] The invention provides a method for preparing a nanoscale corrosion-resistant and biocompatible composite coating on the surface of a medical magnesium alloy, which comprises the following steps:

[0047] (1) Pretreatment: First, the medical Mg-Zn-Y-Nd-Zr alloy obtained by smelting is first heat-treated and extruded to obtain a rod, and the rod is cut into a cylindrical block of Ф9mm×7mm, and 100#, 200#, 400#, 600#, 800# and 1000# metallographic sandpapers were used to mechanically grind and polish the surface in turn, and ultrasonically cleaned in absolute ethanol for 5 minutes to remove surface impurities, and then air-dried naturally after taking it out;

[0048] (2) The configuration of the micro-arc oxidation electrolyte and the configuration of the electrodeposition electrolyte:

[0049] Configuration of micro-arc oxidation electrolyte: the micro-arc oxidation electrolyte contains Na 3 PO 4 、Na 2 SiO 3 , KOH and glycerol in aqueous solution, Na in a magnetical...

Embodiment 3

[0054]The invention provides a method for preparing a nanoscale corrosion-resistant and biocompatible composite coating on the surface of a medical magnesium alloy, which comprises the following steps:

[0055] (1) Pretreatment: First, the medical Mg-Zn-Y-Nd-Zr alloy obtained by smelting is first heat-treated and extruded to obtain a rod, and the rod is cut into a cylindrical block of Ф9mm×7mm, and 100#, 200#, 400#, 600#, 800# and 1000# metallographic sandpapers were used to mechanically grind and polish the surface in turn, and ultrasonically cleaned in absolute ethanol for 5 minutes to remove surface impurities, and then air-dried naturally after taking it out;

[0056] (2) The configuration of the micro-arc oxidation electrolyte and the configuration of the electrodeposition electrolyte:

[0057] Configuration of micro-arc oxidation electrolyte: the micro-arc oxidation electrolyte contains Na 3 PO 4 、Na 2 SiO 3 , KOH and glycerol in aqueous solution, Na in a magneticall...

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Abstract

The invention provides a preparation method of a medical magnesium alloy surface nanoscale corrosion-resistant and biocompatible composite coating. The composite coating is prepared through the micro-arc oxidation and micro-arc oxidation two-step method, a water solution of Na2PO4, Na2SiO3, KOH and glycerol serves as an electrolyte adopted by the micro-arc oxidation method, a dense porous ceramiccoating including elements Si and P is sintered on the surface of a magnesium alloy through electrode surface micro-arc discharging, corrosion resistance can be remarkably improved through stable compounds on the surface, and meanwhile the coating components are degradable and biocompatible in vivo. Then electrochemical deposition is carried out, a water solution of Ca(NO3)2, NH4H2PO4 and NaNO3 serves as an electrolyte used for preparation, the proper pH value is controlled, currents are input to grow a nano-diameter needle-like Ca-P salt coating on the electrode surface in a deposition manner, by means of the coating, corrosion resistance of the magnesium alloy is further improved, fine needle-like Ca-P salt particles on the surface can achieve the bone induction function, fracture healing is promoted, more excellent biosecurity and excellent biodegradability are achieved, cost is low, and preparation is simple.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface treatment, and in particular relates to a method for preparing a nanoscale corrosion-resistant and biocompatible composite coating on the surface of a medical magnesium alloy. Background technique [0002] As a lightweight metal material, magnesium alloy is widely used in orthopedic implant surgery because of its in vivo degradability and excellent biocompatibility. In addition, magnesium has excellent mechanical properties, and the Young's modulus is highly matched with bone tissue, which can avoid the stress shielding effect to a certain extent, which makes magnesium alloys have extremely broad application prospects in the future. However, due to the high surface activity and fast degradation rate of magnesium and its alloys, they cannot exist in the human environment for enough time, and at the same time, the excessively degraded magnesium ions and the produced H 2 It will also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C25D5/18C25D9/12A61L27/30A61L27/32A61L27/56A61L27/58A61L27/50
CPCA61L27/306A61L27/32A61L27/50A61L27/56A61L27/58A61L2400/18A61L2420/02A61L2420/08A61L2430/02C25D5/18C25D9/12C25D11/026C25D11/30
Inventor 关绍康朱世杰刘亦贤蔡国磊班梓发厉瑞琪李懿程前崔驾雾张梦珂
Owner ZHENGZHOU UNIV