Method for carrying out electrochemical treatment on surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate

A bioactive and biomedical technology, applied in anodizing, electrolytic inorganic material coating, etc., can solve the problems of fast corrosion rate and low biological activity, and achieve the improvement of corrosion resistance, increase corrosion resistance, and reduce corrosion current density. Effect

Inactive Publication Date: 2015-06-10
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the problems of low bioactivity and fast corrosion rate in human body fluids of existing biomedical magnesium or magnesium alloys, and provides a biomedical surface electrochemical treatment method with high bioactivity and low degradation rate for biomedical magnesium or magnesium alloys. method

Method used

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  • Method for carrying out electrochemical treatment on surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate
  • Method for carrying out electrochemical treatment on surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate
  • Method for carrying out electrochemical treatment on surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate

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specific Embodiment approach 1

[0015] Embodiment 1: In this embodiment, a method for electrochemically treating the surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate is carried out through the following steps:

[0016] 1. Preparation of micro-arc oxidation film on the surface of magnesium or magnesium alloy: place the magnesium or magnesium alloy with the oxide film removed in the electrolyte as the anode, and titanium as the cathode, and perform micro-arc oxidation for 2 minutes at a voltage of 300V to 450V. ~20min, then the magnesium or magnesium alloy is taken out, rinsed and dried to obtain magnesium or magnesium alloy with a micro-arc oxidation film on the surface; wherein, the electrolyte contains Na with a concentration of 10g / L-20g / L 2 SiO 4 , NaOH with a concentration of 5g / L to 20g / L and KF with a concentration of 5g / L to 10g / L, the temperature of the electrolyte is 15°C to 40°C, and the solvent of the electrolyte is water;

[0017] Two, the...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the micro-arc oxidation is carried out for 10 minutes under the condition of a voltage of 400V. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the surface coating deposition in step 2 is divided into the following three types: ① When the deposition voltage is 3V-5V and the temperature is 25°C-45°C Add dipotassium hydrogen phosphate solution with a concentration of 0.05 mol / L dropwise to a calcium nitrate solution with a concentration of 0.0835 mol / L at a rate of 5 mL / min to 30 mL / min to obtain a surface covered with dihydrogen phosphate Calcium-coated magnesium or magnesium alloy; ② When the deposition voltage is 3V ~ 5V, the temperature is 45 ℃ ~ 65 ℃, the rate is 5mL / min ~ 30mL / min into the calcium nitrate solution with a concentration of 0.835mol / L Add dropwise dipotassium hydrogen phosphate solution with a concentration of 0.05mol / L to obtain magnesium or magnesium alloy with a mixed coating of calcium hydrogen phosphate dihydrate and hydroxyapatite on the surface; Add dipotassium hydrogen phosphate solution with a concentra...

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Abstract

The invention relates to a method carrying out electrochemical treatment on the surface of a biomedical magnesium or magnesium alloy with high biological activity and a low degradation rate. The method mainly solves the problem that an existing biomedical magnesium or magnesium alloy is low in biological activity and high in corrosion rate in human body fluid. The method comprises the steps of pretreating a base material, treating the base material in a micro-arc oxidation mode, treating micro-arc oxide magnesium in an electro-deposition mode, and covering the surface of the material with a calcium phosphate coating. The method is used for treating the surface of the biomedical magnesium or magnesium alloy.

Description

technical field [0001] The invention relates to a method for electrochemically treating the surface of biomedical magnesium or magnesium alloy with high biological activity and low degradation rate. Background technique [0002] Magnesium and its alloys have shown great advantages and potentials as biodegradable implant materials due to their outstanding intrinsic properties, and have attracted more and more attention from researchers at home and abroad. Compared with other artificial implant materials (stainless steel, titanium and cobalt-based alloys), magnesium has special advantages in terms of physical and mechanical properties (the density and elastic modulus of magnesium are very similar to natural bone), and more importantly, It is expected that magnesium can be developed into biomedical degradable implant materials and devices by utilizing its corrosion and dissolution in physiological environment. [0003] Magnesium contains Cl - The rapid corrosion in ionic solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C25D9/08
CPCC25D9/08C25D11/30
Inventor 胡津韩嘉平唐莎巍
Owner HARBIN INST OF TECH
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