CN106086993A - A kind of magnesium alloy differential arc oxidation electrolyte and magnesium alloy differential arc oxidation method - Google Patents
A kind of magnesium alloy differential arc oxidation electrolyte and magnesium alloy differential arc oxidation method Download PDFInfo
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- CN106086993A CN106086993A CN201610589679.1A CN201610589679A CN106086993A CN 106086993 A CN106086993 A CN 106086993A CN 201610589679 A CN201610589679 A CN 201610589679A CN 106086993 A CN106086993 A CN 106086993A
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
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Abstract
The invention provides a kind of magnesium alloy differential arc oxidation electrolyte, including each component of following content: highly basic 3 20g/L, fluoride 2 15g/L, containing zinc electrolyte 2 10g/L, wherein, described is EDTAZnNa containing zinc electrolyte2Or zinc acetate.This electrolyte solution composition is simple, it is easy to control, without easily decomposing composition, and process stabilizing, and without to human body and the material of bad environmental, for green electrolyte.Use this electrolyte that magnesium alloy carries out differential arc oxidation and can obtain containing zinc oxidation film layer, this oxidation film layer thickness uniformly, densification, smooth surface, hole diameter little, there is ceramic outward appearance, good with basal body binding force, there is good anti-microbial property, corrosion resisting property and biocompatibility.Present invention also offers a kind of magnesium alloy differential arc oxidation method, and by what the method prepared, there is the application in Bone Defect Repari of the magnesium alloy workpiece containing zinc oxidation film layer.
Description
Technical field
The present invention relates to technical field of magnesium alloy surface treatment, particularly relate to a kind of magnesium alloy differential arc oxidation electrolyte and
Magnesium alloy differential arc oxidation method.
Background technology
The wound caused along with scientific technological advance, aged tendency of population and industry, traffic, physical culture etc. increases, people couple
The demand of bio-medical material and goods thereof is increasing.The most widely used Fracture internal fixaiion equipment is many by stainless at present
Steel and titanium alloy manufacture.Compared with rustless steel and titanium alloy material, magnesium alloy has the advantage that the springform of (1) magnesium alloy
Amount with people's bone closer to, can effectively alleviate stress-shielding effect；(2) magnesium is one of necessary macroelement of human body, has a lot
Biological function and good biocompatibility, play the biggest effect to bone formation；And other metallic biomaterial is at body fluid
Poisonous ion or granule may be discharged after middle corrosion or abrasion；(3) the most conventional metal implant is for Bone Defect Repari
After need through second operation take out；Magnesium alloy, as degradation material, is avoided that second operation, reduces patient suffering and economy is born
Load.Although magnesium alloy has the application prospect of uniqueness, but its corrosion degradation excessive velocities in body fluid in bio-medical field.Cause
This, the biocompatibility and the corrosion resistance that improve magnesium alloy become the key that magnesium alloy is applied in orthopaedics inner implantation material field.
Differential arc oxidation is a kind of process for treating surface at metal surface in-situ preparation ceramic membranes such as magnesium, aluminum and titaniums, institute's shape
The film layer become has that corrosion resisting property is good, anti-wear performance is high and matrix such as is well combined at the feature.Use differential arc oxidation at magnesium alloy table
Face in-situ preparation oxide-film, can not only delay magnesium alloy corrosion degradation speed in body fluid, and owing to spark discharge is being coated with
The loose structure that layer surface is formed is conducive to osteoblastic adhesion, breeds and break up, and improves magnesium alloy biocompatibility.And by
Ceramic membrane performance such as surface topography, composition, structure and the corrosion resistance prepared in differential arc oxidation are mainly made up of electrolyte, matrix material
Material and electrical quantity are determined, therefore can obtain the oxide-film of certain performance by regulating above influence factor.Additionally, due to it is real
Inorganic component in the bone of people from border is not pure hydroxyapatite (HA), and it is possibly together with trace units such as sodium, magnesium, silicon, strontium, zinc, copper
Element.Therefore in terms of bionical angle, for improving the synosteosis of oxidation film layer further, effective approach is these trace units clear
Element effect in skeletonization also introduces them into the film layer of calcic microcosmic salt.Zinc is one of micronutrient element of needed by human,
Affect human skeleton grow, metabolism and function, promote bone propagation and differentiation, promote skeletonization and the mineralising of osteocyte,
The apoptosis of osteocyte can be suppressed the most to a certain extent.Experiment in vitro shows, after the zinc of proper content is introduced film layer, can change
The biology performance of kind film layer.It addition, zinc or a kind of conventional inorganic antiseptic.
Implant infections relating is the complication the most serious that patient faces, and always perplexs the challenge of orthopedist
A property difficult problem.Although magnesium alloy substrate has anti-microbial property, but is implanted by the magnesium alloy of Surface Creation film layer, it is the most not
There is anti-microbial property.Therefore prepare antibiotic property biological membranous layer at Mg alloy surface to be highly desirable to.Have document at present to use first
Magnesium alloy is carried out differential arc oxidation process, then use the method for electroless zinc plating zinc is introduced in oxidation film layer (in graceful, Li De
Super, Li Muqin, Wang Jingang, Liu Lichen. the impact bioactive on osteoblast of pure magnesium differential arc oxidation bioactivity coatings on zinc
[J]. China's stereology and graphical analysis, 2015,20 (2): 136-141), but this method needs two steps to realize, technique
Relative complex.
Summary of the invention
In consideration of it, first aspect present invention provides a kind of magnesium alloy differential arc oxidation electrolyte, this electrolyte solution composition
Simply, it is easy to control, without easily decomposing composition, process stabilizing, and green non-pollution, this electrolyte is used to carry out micro-to magnesium alloy
Arc oxidation can obtain have good corrosion resisting property, anti-microbial property and bio-compatible performance containing zinc oxidation film layer.
First aspect, the invention provides a kind of magnesium alloy differential arc oxidation electrolyte, including each component of following content: strong
Alkali 3-20g/L, fluoride 2-15g/L, containing zinc electrolyte 2-10g/L, wherein, described is EDTAZnNa containing zinc electrolyte2Or second
Acid zinc.
In magnesium alloy differential arc oxidation electrolyte of the present invention, highly basic and fluoride are the strong passivator of magnesium alloy, can promote micro-
Arc oxide-film is at Mg alloy surface normal growth.
In the present invention, described highly basic can be sodium hydroxide or potassium hydroxide；Described fluoride can be ammonium acid fluoride, sodium fluoride
Or potassium fluoride.Sodium fluoride or potassium fluoride are alkalescence, and ammonium acid fluoride is neutral, use ammonium acid fluoride can reduce micro-pore diameter,
Increase the thickness of oxide-film, thus improve the corrosion resisting property of film layer.
In the present invention, EDTAZnNa2Fine with zinc acetate dissolubility in water, and EDTAZnNa2There is chelating agent
Matter, is conducive to introducing in oxide-film the zinc ion in solution, and zinc acetate is cheap, beneficially industrialized production.
Alternatively, in magnesium alloy differential arc oxidation electrolyte of the present invention, the content of described highly basic is 6-15g/L, 10-18g/L
Or 8-12g/L；The content of described fluoride is 5-10g/L or 8-12g/L；The described content containing zinc electrolyte is 5-8g/L.
In the present invention, described magnesium alloy differential arc oxidation electrolyte also can farther include the one or many in following component
Kind: phosphorous acid or phosphate, calcium salt, carbonate, silicate, boric acid or borate.
In the present invention, described magnesium alloy differential arc oxidation electrolyte farther include the one in the component of following content or
Multiple: phosphorous acid or phosphate 3-50g/L, calcium salt 3-50g/L, carbonate 5-20g/L, silicate 5-50g/L, boric acid or boron
Hydrochlorate 5-50g/L.Alternatively, the content of each component is: phosphorous acid or phosphate 5-20g/L, calcium salt 5-20g/L, carbonate
10-15g/L, silicate 8-20g/L, boric acid or borate 8-20g/L.
In the present invention, described phosphorous acid or phosphate are organic phytic acid or phytate or inorganic phosphoric acid or phosphate；
Described calcium salt is one or more in calcium acetate, calcium carbonate, dalcium biphosphate, calcium hydroxide and calcium glycerophosphate；Described carbon
Hydrochlorate is alkali carbonate (such as sodium carbonate, potassium carbonate, lithium carbonate) or alkali metal hydrogencarbonate；Described silicate is alkali metal
Silicate (such as sodium silicate, potassium silicate or Lithium metasilicate)；Described borate is alkali borate (sodium tetraborate or dipotassium tetraborate)
Or alkali metal metaborate (sodium metaborate or potassium metaborate).Wherein, phytic acid or phytate, nontoxic.Phytic acid is also known as inositol
Six phosphate ester, are widely present in oils and seed corn.In phytate molecule structure, 6 phosphate only one of which are in a position, its
It 5 wherein have 4 phosphates in the same plane all on e position, therefore phytic acid is when metal surface and metal complex,
Easily form one layer of fine and close unimolecule protecting film in metal surface, can effectively stop O2Deng entrance metal surface, thus effectively
Slow down corrosion of metal.
The magnesium alloy differential arc oxidation electrolyte that first aspect present invention provides, solution composition is simple, it is easy to control, without easily
Decompose composition, process stabilizing, and do not contain human body and the material of bad environmental, green non-pollution；Use this electrolyte that magnesium is closed
Gold carries out differential arc oxidation and can obtain containing zinc oxidation film layer, this oxidation film layer thickness uniformly, densification, smooth surface, hole diameter little,
There is ceramic outward appearance, good with basal body binding force, and there is good anti-microbial property, corrosion resisting property and biocompatibility.
Second aspect, the invention provides a kind of magnesium alloy differential arc oxidation method, comprises the following steps:
Magnesium alloy workpiece is carried out pre-treatment；
Magnesium alloy workpiece after pre-treatment is immersed magnesium alloy differential arc oxidation electrolysis as described in the first aspect of the invention
Liquid carries out differential arc oxidation, after having aoxidized, forms the uniform oxidation film layer on zinc at described magnesium alloy work-piece surface, then through after
Process and i.e. obtain that there is the magnesium alloy workpiece containing zinc oxidation film layer.
In the present invention, the machine for workpiece adds and die casting surface, and described pre-treatment can be: carry out defat and pickling behaviour successively
Make；And for having the workpiece on sand casting surface, described pre-treatment can be: the most mechanically (polish or grind) removing table
Facing sand grain, then carries out oil removing and pickling.
Described defat uses aqueous slkali to be concentration 5-40g/L sodium hydroxide, 5-35g/L potassium hydroxide, 10-25g/L silicic acid
Sodium, 10-30g/L sodium carbonate, 10-20g/L sodium phosphate one of which or its compound, its wash temperature control 50-95 DEG C it
Between, the time is 5-15min；Described pickling use solution be concentration 5-20g/L Fluohydric acid., 5-15g/L nitric acid, 5-25g/L sulphuric acid,
A kind of acid or the combination solution of multiple acid in 5-40g/L phosphoric acid, its wash temperature controls at 20-60 DEG C, and the time is 0.5-5min.
When magnesium alloy sample greasy dirt is serious, petroleum-type, virtue can be used before the inventive method above-mentioned (aqueous slkali) defat
The same clan, hydro carbons or chloride kind solvent carry out solvent process, to reach optimal degreasing effect.
In the present invention, after described in being formed containing zinc oxidation film layer, farther include to use tap water and distilled water flushing, so
Use hot blast drying post-processing operation afterwards, or carry out sealing of hole post-processing operation.Specifically, sodium silicate aqueous solution carries out sealing of hole,
Or in the aqueous solution of phytic acid or phytate, carry out sealing of hole.Described sealing of hole in sodium silicate aqueous solution: sodium silicate aqueous solution concentration
For 50g/L, process 15 minutes in 95 DEG C, then place in air and cool down 30 points.
In the present invention, in described micro-arc oxidation process, power supply used is the pulse power, its have positive negative pulse stuffing, frequency and
The continuously adjustable feature of pulse duty factor, pulse frequency 100Hz-3000Hz, dutycycle 5%-40%, electric current density is 10mA/
cm2-80mA/cm2, electrolyte temperature controls at 15-40 DEG C, and oxidization time is 2～50 minutes, and whole voltage is 100-800V.Specifically
Ground, each 5-40% of positive and negative pulse duty factor, positive whole voltage is 100-800V, and negative whole voltage is 50-150V.
In the present invention, the described surface containing zinc oxidation film layer is cellular, and aperture is 0.1-3.0 μm, described containing zinc oxide-film
The thickness of layer is 4-30 μm, and Zn content is 0.2%-5% atomic percent.Color containing zinc oxidation film layer is Lycoperdon polymorphum Vitt.The present invention
In, by control the parameters such as different oxidization time can obtain different-thickness containing zinc oxidation film layer.
In micro-arc oxidation process of the present invention, workpiece poly fourfluoroplastics is become attached to encapsulation, and rustless steel is negative electrode.Owing to spark is put
During electricity, solution temperature can raise, thus oxidation unit also includes stirring cooling device.Stirring electrolyte and low electrolysis liquid temperature
Degree can make oxide/electrolyte surface preferably cool down, thus the hole of oxide-film is less, and pattern is evenly；Stirring
Another effect be accelerate gas the two poles of the earth separate out, improve film layer uniformity.
Washing it is both needed to after each operating procedure of the present invention.
Second aspect present invention provide magnesium alloy differential arc oxidation method, use a step differential arc oxidation method can successfully by
Appropriate zinc introduces in micro-arc oxidation films, it is achieved prepare high corrosion-resistant antiseptic paint at medical magnesium alloy surface；The method work
Skill is stable, it is easy to control.
The third aspect, the method as described in respect of the second aspect of the invention that present invention also offers prepares to have and aoxidizes containing zinc
The application in Bone Defect Repari of the magnesium alloy workpiece of film layer.
Advantages of the present invention will partly illustrate, and a part is apparent according to description
, or can be known by the enforcement of the embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 be in the embodiment of the present invention 1 preparation containing zinc oxidation film layer surface topography map；
Fig. 2 be in the embodiment of the present invention 2 preparation containing zinc oxidation film layer surface topography map.
Detailed description of the invention
The following stated is the preferred implementation of the embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from embodiment of the present invention principle, it is also possible to make some improvements and modifications, these improve
With the protection domain that retouching is also considered as the embodiment of the present invention.
Embodiment 1
A kind of magnesium alloy differential arc oxidation method, comprises the following steps:
(1) pressure casting magnesium alloy workpiece, carries out aqueous slkali defat and Fluohydric acid. pickling pre-treatment successively by it；
Defat: with 10g/L sodium hydroxide, 15g/L sodium phosphate and the washing of 15g/L sodium carbonate combination solution, remove general dirty
Thing, the lubricant of sintering attachment, cutting agent etc.；Temperature controls at 70 DEG C, and the time is 5 points；Then wash；
Pickling: by the compounding acid solution wash of dense Fluohydric acid., phosphoric acid 1:1 by volume, the wherein matter of HF in Fluohydric acid.
Amount percent concentration is no less than 40%, H in phosphoric acid3PO4Mass percent concentration no less than 85%, remove in defat not removed
Oxide skin, corrosion product, sintering attachment lubricant, the lubricant brought into, steel grit, casting model powder and other dirts；Temperature is
30 DEG C, the time is 1 point；Then wash；
(2) by after pre-treatment magnesium alloy workpiece immerse containing 10g/L NaOH, 8g/L phytic acid, 2g/L ammonium acid fluoride and
2g/L EDTAZnNa2Magnesium alloy differential arc oxidation electrolyte in carry out differential arc oxidation, in oxidizing process, electric current density is 40mA/
cm2, pulse frequency is 2000Hz, and dutycycle is 35%, and electrolyte temperature controls at 25 DEG C, oxidization time 3min, positive whole voltage
For 300V, negative whole voltage is 120V；After having aoxidized, magnesium alloy work-piece surface formed thickness be 7.0 μm containing zinc oxide-film
Layer, i.e. obtains having the magnesium alloy workpiece containing zinc oxidation film layer.
Fig. 1 be the present embodiment prepare containing zinc oxidation film layer surface topography map.It is seen that this oxidation film layer surface
Smooth, uniform, fine and close and in cellular, the diameter in hole is little, and about 0.1-2.0 μm, crackle is few.Oxygen prepared by the present embodiment
Changing sample and with staphylococcus aureus, escherichia coli are contacted 30min, antibiotic rate is all higher than 60%.
Use the corrosion resistance of salt spray test detection magnesium alloy workpiece.Salt mist experiment is entered by ASTMB117 and ASTMB398 standard
OK.Experimental temperature is 35.5 ± 0.5 DEG C, and corrosive medium used is the 5%NaCl solution of pH=7, sample testing face and Vertical Square
To institute, angulation is 20 DEG C, and in addition to test surfaces, other each, sample adhesive tape seals protection.Salt mist experiment 48 hours, sample table
Only there is 1-2 small corrosion pit in face.
Embodiment 2
A kind of magnesium alloy differential arc oxidation method, comprises the following steps:
(1) pressure casting magnesium alloy workpiece, carries out aqueous slkali defat and Fluohydric acid. pickling pre-treatment successively by it；Concrete with real
Execute example 1；
(2) by after pre-treatment magnesium alloy workpiece immerse containing 10g/L NaOH, 8g/L phytic acid, 2g/L ammonium acid fluoride and
2.5g/L EDTAZnNa2Magnesium alloy differential arc oxidation electrolyte in carry out differential arc oxidation, in oxidizing process, electric current density is
40mA/cm2, pulse frequency is 2000Hz, and dutycycle is 35%, and electrolyte temperature controls at 30 DEG C, oxidization time 3min, the most eventually
Voltage is 300V, and negative whole voltage is 120V；After having aoxidized, magnesium alloy work-piece surface formed thickness be 6.0 μm containing zinc oxygen
Change film layer, more post-treated i.e. obtaining has the magnesium alloy workpiece containing zinc oxidation film layer.
Fig. 2 be the present embodiment prepare containing zinc oxidation film layer surface topography map.It is seen that this oxidation film layer surface
Smooth, uniform, fine and close and in cellular, the diameter in hole is little, about 0.1-1.6 μm, and crackle is less relative to embodiment 1.
Embodiment 3
Difference from Example 1 is only that, after being formed containing zinc oxidation film layer, carries out as follows in sodium silicate aqueous solution
Sealing pores: in the sodium silicate aqueous solution of 50g/L, heats 15 minutes in 95 DEG C, then places in air and cool down 30 points, obtain
After sealing of hole containing zinc oxidation film layer magnesium alloy workpiece.
Use the corrosion resistance of salt spray test detection magnesium alloy workpiece.Salt mist experiment is entered by ASTMB117 and ASTMB398 standard
OK.Experimental temperature is 35.5 ± 0.5 DEG C, and corrosive medium used is the 5%NaCl solution of pH=7, sample testing face and Vertical Square
To institute, angulation is 20 DEG C, and in addition to test surfaces, other each, sample adhesive tape seals protection.Salt mist experiment 48 hours, sample table
Face produces without obvious hot spot.
Embodiment 4
A kind of magnesium alloy differential arc oxidation method, comprises the following steps:
(1) pressure casting magnesium alloy workpiece, carries out aqueous slkali defat and Fluohydric acid. pickling pre-treatment successively by it；Concrete with real
Execute example 1；
(2) magnesium alloy workpiece after pre-treatment is immersed the zinc acetate Han 3g/L, 8g/L NaOH, 4g/L sodium fluoride, 5g/L
Phytic acid, 10g/L sodium silicate, the magnesium alloy differential arc oxidation electrolyte of 10g/L sodium borate carries out differential arc oxidation.In oxidizing process,
Electric current density is 40mA/cm2, pulse frequency is 2000Hz, and dutycycle is 35%, and electrolyte temperature controls at 25 DEG C, during oxidation
Between 3min, positive whole voltage is 300V, and negative whole voltage is 120V；After having aoxidized, forming thickness at magnesium alloy work-piece surface is 8.0
μm containing zinc oxidation film layer, micro-pore diameter is 0.1-2.0 μm.The oxidation sample prepared by the present embodiment is to escherichia coli and golden yellow
Color staphylococcus contact 30min, antibiotic rate is all higher than 50%.
Embodiment 5
A kind of magnesium alloy differential arc oxidation method, comprises the following steps:
(1) pressure casting magnesium alloy workpiece, carries out aqueous slkali defat and Fluohydric acid. pickling pre-treatment successively by it；Concrete with real
Execute example 1；
(2) by after pre-treatment magnesium alloy workpiece immerse containing 7g/L sodium hydroxide, 5g/L sodium fluoride, 8g/L sodium phytate,
10g/L sodium silicate, 10g/L sodium borate and 2.0g/L EDTAZnNa2Magnesium alloy differential arc oxidation electrolyte in carry out differential of the arc oxygen
Change.In oxidizing process, electric current density is 40mA/cm2, pulse frequency is 2000Hz, and dutycycle is 20%, and electrolyte temperature controls
At 25 DEG C, oxidization time 4min, positive whole voltage is 300V, and negative whole voltage is 120V；After having aoxidized, at magnesium alloy work-piece surface
Formed thickness be 8.0 μm containing zinc oxidation film layer, pore size is 0.1-2.5 μm.Oxidation sample pair prepared by the present embodiment
Escherichia coli contact 30min with staphylococcus aureus, and antibiotic rate is all higher than 40%.
Embodiment 6
A kind of magnesium alloy differential arc oxidation method, comprises the following steps:
(1) pressure casting magnesium alloy workpiece, carries out aqueous slkali defat and Fluohydric acid. pickling pre-treatment successively by it；Concrete with real
Execute example 1；
(2) magnesium alloy workpiece after pre-treatment is immersed containing 7g/L sodium hydroxide, 8g/L phytic acid, 4.0g/L
EDTAZnNa2, 4g/L dalcium biphosphate and 10g/L ammonium acid fluoride magnesium alloy differential arc oxidation electrolyte in carry out differential arc oxidation.
In oxidizing process, electric current density is 40mA/cm2, pulse frequency is 2000Hz, and dutycycle is 20%, and electrolyte temperature controls
25 DEG C, oxidization time 4min, positive whole voltage is 300V, and negative whole voltage is 120V；After having aoxidized, in magnesium alloy work-piece surface shape
Become thickness be 7.0 μm containing zinc oxidation film layer, pore size is 0.1-2.5 μm；
(3) by the magnesium alloy workpiece sealing of hole in the aqueous solution of phytic acid or phytate after oxidation: by 4g/ in the present embodiment
Carrying out sealing of hole in the solution of L sodium hydroxide and 12g/L phytic acid composition, dispensing order is: be initially charged sodium hydroxide and part distillation
Water, is subsequently adding phytic acid, it is to avoid sodium hydroxide directly contacts with phytic acid and violent chemical reaction occurs, and solution temperature controls 60
DEG C, the sealing of hole time is 10 minutes.
Claims (10)
1. a magnesium alloy differential arc oxidation electrolyte, it is characterised in that include each component of following content: highly basic 3-20g/L, fluorine
Compound 2-15g/L, containing zinc electrolyte 2-10g/L, wherein, described is EDTAZnNa containing zinc electrolyte2Or zinc acetate.
2. magnesium alloy differential arc oxidation electrolyte as claimed in claim 1, it is characterised in that farther include the group of following content
One or more in Fen: phosphorous acid or phosphate 3-50g/L, calcium salt 3-50g/L, carbonate 5-20g/L, silicate 5-
50g/L, boric acid or borate 5-50g/L.
3. magnesium alloy differential arc oxidation electrolyte as claimed in claim 1, it is characterised in that described highly basic is sodium hydroxide or hydrogen
Potassium oxide.
4. magnesium alloy differential arc oxidation electrolyte as claimed in claim 1, it is characterised in that described fluoride be ammonium acid fluoride,
Sodium fluoride or potassium fluoride.
5. magnesium alloy differential arc oxidation electrolyte as claimed in claim 2, it is characterised in that described phosphorous acid or phosphate are
Organic phytic acid or phytate or inorganic phosphoric acid or phosphate；Described calcium salt is calcium acetate, calcium carbonate, dalcium biphosphate, hydrogen-oxygen
Change one or more in calcium and calcium glycerophosphate；Described carbonate is alkali carbonate or alkali metal hydrogencarbonate；Described
Silicate is alkali silicate；Described borate is alkali borate or alkali metal metaborate.
6. a magnesium alloy differential arc oxidation method, it is characterised in that comprise the following steps:
Magnesium alloy workpiece is carried out pre-treatment；
Magnesium alloy workpiece after pre-treatment is immersed the magnesium alloy differential arc oxidation electrolyte as described in any one of claim 1-5
In carry out differential arc oxidation, after having aoxidized, form the uniform oxidation film layer on zinc at described magnesium alloy work-piece surface, i.e. had
There is the magnesium alloy workpiece containing zinc oxidation film layer.
7. magnesium alloy differential arc oxidation method as claimed in claim 6, it is characterised in that forming the described oxidation film layer on zinc
After, farther include sealing of hole post-processing operation.
8. magnesium alloy differential arc oxidation method as claimed in claim 6, it is characterised in that in described micro-arc oxidation process, used
Power supply is the pulse power, pulse frequency 100Hz-3000Hz, dutycycle 5%-40%, and electric current density is 10mA/cm2-80mA/
cm2, electrolyte temperature controls at 15-40 DEG C, and oxidization time is 2-50 minute, and whole voltage is 100-800V.
9. magnesium alloy differential arc oxidation method as claimed in claim 6, it is characterised in that the described surface containing zinc oxidation film layer is in many
Poroid, aperture is 0.1-3.0 μm, and the described thickness containing zinc oxidation film layer is 4-30 μm, and Zn content is 0.2%-5% atomic percent
Ratio.
10. the method as described in any one of claim 6-9 prepares and has the magnesium alloy workpiece containing zinc oxidation film layer at bone
Application in reparation.
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| CN109432514A (en) * | 2018-12-12 | 2019-03-08 | 西南大学 | Have degradable magnesium alloy bone nail and preparation method that squamous imitates bone nano-structured coating |
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| CN109913922A (en) * | 2019-03-15 | 2019-06-21 | 石狮市星火铝制品有限公司 | For the electrolyte of antibacterial Microarc Oxidation of Al-mg Alloy, antibacterial magnesium alloy and preparation method thereof |
| CN113913897B (en) * | 2021-10-12 | 2024-01-09 | 长安大学 | Preparation method of ceramic membrane with antibacterial function based on magnesium alloy |
| CN113913897A (en) * | 2021-10-12 | 2022-01-11 | 长安大学 | Preparation method of ceramic membrane with antibacterial function based on magnesium alloy |
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