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Micro-arc oxidation method in non-aqueous electrolyte system

A non-aqueous electrolyte, micro-arc oxidation technology, used in electrolytic coatings, anodizing, surface reaction electrolytic coatings, etc., to achieve excellent osteogenic activity, good adaptability and stability, and good stability.

Active Publication Date: 2018-12-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of a certain amount of water in the electrolyte, the oxygen content is still as high as 21.4 at%.

Method used

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  • Micro-arc oxidation method in non-aqueous electrolyte system
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  • Micro-arc oxidation method in non-aqueous electrolyte system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A micro-arc oxidation method in a non-aqueous electrolyte system, comprising the following steps:

[0028] ⑴ Preparation of electrolyte:

[0029] Add 120 g of ammonium bifluoride to 1 L of mixed alcohol, stir at 65°C until completely dissolved, cool to room temperature, and then dissolve in 10 g of lactic acid to obtain an electrolyte.

[0030] Wherein: mixed alcohol refers to the mixed solution of 10 wt% absolute ethanol and 90 wt% ethylene glycol.

[0031] ⑵Sample pretreatment:

[0032] AZ91 magnesium alloy sample (25 mm×25 mm×10 mm), AM60 magnesium alloy sample (25 mm×25 mm×10 mm), WE43 magnesium alloy sample (25 mm×10 mm×5 mm), pure magnesium Sample (20 mm×10 mm×5 mm), 2024 aluminum alloy sample (25 mm×25 mm×5 mm), 6061 aluminum alloy sample (25 mm×25 mm×5 mm), ZL101 aluminum alloy sample (25 mm×25 mm×10 mm) and pure aluminum sample (20 mm×10 mm×5 mm) were polished and polished by 320#-600#-1000#-2000# water sandpaper respectively, and then passed th...

Embodiment 2

[0039] Embodiment 2 A micro-arc oxidation method in a non-aqueous electrolyte system, comprising the following steps:

[0040] ⑴ Preparation of electrolyte:

[0041] Add 120 g of ammonium fluoride to 1 L of mixed alcohol, stir at 50°C until completely dissolved, cool to room temperature, and then dissolve in 10 g of citric acid to obtain an electrolyte.

[0042] Wherein: mixed alcohol refers to the mixed solution of 10 wt% absolute ethanol and 90 wt% ethylene glycol.

[0043] ⑵Sample pretreatment:

[0044] After the AZ91 magnesium alloy sample (25 mm×25 mm×10 mm) and the 6061 aluminum alloy sample (25 mm×25 mm×5 mm) were polished by 320#-600#-1000#-2000# water sandpaper , rinsed with running water and deionized water, ultrasonically cleaned with absolute ethanol for 5 min, and then dried for later use.

[0045] ⑶ Micro-arc oxidation:

[0046] The pretreated sample is connected to the anode of the micro-arc oxidation power supply, and the stainless steel sheet is connected to...

Embodiment 3

[0051] Embodiment 3 A micro-arc oxidation method in a non-aqueous electrolyte system, comprising the following steps:

[0052] ⑴ Preparation of electrolyte:

[0053] Measure five parts of mixed alcohol, 1 L each, add 30 g of barium fluoride, cesium fluoride, lithium fluoride, ammonium fluoroborate, potassium fluoroborate respectively, stir at 40°C until completely dissolved, then cool to At room temperature, dissolve 6 g of lactic acid and 3 g of citric acid to obtain the electrolyte.

[0054] Wherein: mixed alcohol refers to the mixed solution of 10 wt% absolute ethanol and 90 wt% ethylene glycol.

[0055] (2) Sample pretreatment is the same as in Example 2.

[0056] ⑶ Micro-arc oxidation:

[0057] The pretreated sample is connected to the anode of the micro-arc oxidation power supply, and the stainless steel sheet is connected to the cathode, and placed in the electrolyte. The sample after the micro-arc oxidation treatment is rinsed with running water and deionized water,...

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Abstract

The invention relates to a micro-arc oxidation method in a non-aqueous electrolyte system. The micro-arc oxidation method comprises the following steps that (1) an electrolyte is prepared, wherein a fluorine-containing compound is added into mixed alcohol, stirring is carried out until complete dissolving is achieved, cooling is carried out to the room temperature, then an additive is dissolved ina mixture, and the electrolyte is obtained; (2) sample pretreatment is carried out, wherein samples are ground, polished, rinsed, ultrasonically cleaned and blown to be dried for standby application;and (3) micro-arc oxidation is carried out, wherein the pre-treated samples connected with a micro-arc oxidation power supply anode and a stainless steel sheet connected with a cathode are placed inthe electrolyte, and then rinsing and blow drying are carried out after micro-arc oxidation treatment. The method is simple and easy to implement, and a prepared fluoride film layer can be applied tothe fields of acid environment corrosion resistance, biomedical magnesium alloy surface treatment and the like.

Description

technical field [0001] The invention relates to the field of surface treatment of light metal materials, in particular to a micro-arc oxidation method in a non-aqueous electrolyte system. Background technique [0002] Light metal materials are known for their light weight and high performance, and have good mechanical properties and forming (type) properties. They are widely used in military weapons, aerospace, machinery manufacturing, and automobile industries. Among them, magnesium alloy and aluminum alloy are indispensable materials in the current civilian consumption field. In addition, good biocompatibility and degradability also make magnesium alloys receive more and more attention in the field of biomedicine. However, in practical applications, these two types of alloys generally require surface treatment to improve corrosion resistance and surface properties. Among them, the micro-arc oxidation technology not only has the technical advantages of simple process and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/10C25D11/16C25D11/30
CPCC25D11/026C25D11/10C25D11/16C25D11/30
Inventor 梁军齐玉明彭振军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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