Electrochemical treatment method suitable for magnesium alloy interventional device and auxiliary equipment

A processing method and auxiliary equipment technology, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of unstable polishing results, complicated operation, and the content of polishing liquid, etc., and achieve the effect of convenient clamping, high smoothness, and bright surface quality

Active Publication Date: 2014-10-01
ZHENGZHOU UNIV
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Problems solved by technology

[0006]Currently, there are few related discussions on the electrolytic polishing technology of magnesium alloy interventional devices. A method for processing and preparing a biodegradable magnesium alloy stent body, but the polishing solution contains harmful substances to the human body and is carried out at very high temperature
Zhang Xiaobo and Yuan Guangyin of Shanghai Jiaotong University disclosed an electrochemical polishing method for degradable magnesium alloy stents. This method is healthy and environmentally friendly, but the polishing results are unstable and the operation is complicated

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  • Electrochemical treatment method suitable for magnesium alloy interventional device and auxiliary equipment
  • Electrochemical treatment method suitable for magnesium alloy interventional device and auxiliary equipment
  • Electrochemical treatment method suitable for magnesium alloy interventional device and auxiliary equipment

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Embodiment 1

[0026] Embodiment 1: Electrolytic polishing of magnesium zinc yttrium neodymium alloy vascular stent

[0027] An electrochemical treatment method suitable for magnesium alloy interventional devices, including surface pretreatment and electrolytic polishing, the pretreatment is: ultrasonically cleaning the magnesium zinc yttrium neodymium alloy stent in a pretreatment aqueous solution at 50 ° C for 15 minutes, and then Then place it in absolute ethanol for ultrasonic cleaning for 10 minutes; 1 L of pretreatment aqueous solution is composed of: 30 g of sodium phosphate, 20 g of sodium hydroxide, 80 g of sodium silicate, and the balance is distilled water. The power of the ultrasonic cleaner is 50Hz. The electrolytic polishing is as follows: the pretreated magnesium zinc yttrium neodymium alloy vascular stent is clamped and then placed in the electrolyte, and electrolytic polishing is carried out at room temperature; the cathode material is an annular mesh stainless steel elect...

Embodiment 2

[0031] Embodiment 2: Electropolishing of magnesium-zinc-calcium bone plate or bone nail

[0032]An electrochemical treatment method suitable for magnesium alloy interventional devices, including surface pretreatment and electrolytic polishing, the pretreatment is: ultrasonically cleaning magnesium-zinc-calcium bone plates or bone nails in a pretreatment aqueous solution at 60°C for 10 minutes, Then place it in absolute ethanol for ultrasonic cleaning for 10 minutes; 1 L of pretreatment aqueous solution is composed of: 20 g of sodium phosphate, 30 g of sodium hydroxide, 60 g of sodium silicate, and the balance is distilled water. The power of the ultrasonic cleaner is 50Hz. The electrolytic polishing is as follows: the surface pretreated magnesium-zinc-calcium bone plate or bone nail is clamped and then placed in the electrolyte, and electrolytic polishing is carried out at room temperature; the cathode material is an annular mesh stainless steel electrode, and the polishing ...

Embodiment 3

[0036] Embodiment 3: Electrolytic polishing to AZ31 alloy wire

[0037] An electrochemical treatment method suitable for magnesium alloy interventional devices, including surface pretreatment and electrolytic polishing, the pretreatment is: AZ31 alloy wire is ultrasonically cleaned at 70°C for 5 minutes in a pretreatment aqueous solution, and then placed in Ultrasonic cleaning in absolute ethanol for 15 minutes; 1 L of pretreatment aqueous solution is composed of: 45 g of sodium phosphate, 10 g of sodium hydroxide, 30 g of sodium silicate, and distilled water as the balance. The power of the ultrasonic cleaner is 50Hz. The electrolytic polishing is as follows: clamp the AZ31 alloy wire that has been pretreated on the surface, place it in the electrolyte, and perform electrolytic polishing at room temperature; the cathode material is an annular mesh stainless steel electrode, the polishing voltage is 20V, and the polishing current It is 0.10A, the electrode distance is 60mm,...

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Abstract

The invention relates to an electrochemical treatment method suitable for a magnesium alloy interventional device. The electrochemical treatment method comprises surface pretreatment and electrochemical polishing, wherein the pretreatment comprises the sub-steps: ultrasonically cleaning the magnesium alloy interventional device in a pretreatment aqueous solution at the temperature of 40-70 DEG C for 5-30 minutes, and ultrasonically cleaning in absolute ethyl alcohol for 5-20 minutes, wherein 1L of pretreatment aqueous solution comprises the following components: 5-50g of sodium phosphate, 5-40g of sodium hydroxide, 10-100g of sodium silicate and the balance of distilled water. According to the pretreatment aqueous solution, the electrochemical polishing solution has high biocompatibility, the surface treatment effect is good, and the pretreatment aqueous solution is suitable for most of magnesium alloy interventional devices. Moreover, the related auxiliary equipment clamping mode is unique and convenient, the product can be uniformly polished, multiple samples of different types can be simultaneously clamped, and the method is suitable for electrochemical polishing of the meshed, rod-shaped, tubular, plate-shaped and other-shaped magnesium alloy interventional devices.

Description

technical field [0001] The invention belongs to the technical field of biomedical materials, and in particular relates to an electrochemical treatment method and auxiliary equipment suitable for magnesium alloy interventional devices. Background technique [0002] Magnesium is one of the essential constant elements for the human body, and it is the fourth metal element in the human body. It is mainly distributed in the cells and participates in a series of metabolic processes, and the standard equilibrium potential of magnesium is relatively negative (-2.37V), so it is easy to be absorbed by the human body. Corrosion and degradation in the environment, so magnesium and magnesium alloys have the natural advantages of developing biodegradable materials, which are suitable for the preparation of degradable implant materials. [0003] In recent years, magnesium alloy materials have received special attention and are known as a revolutionary medical metal material. Researchers fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/18C25F7/00
Inventor 关绍康谭文徐小洁王利国朱世杰赵鹏超
Owner ZHENGZHOU UNIV
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