CN105154963A - Electrolytic polishing solution for magnesium alloy medical heart stent and surface polishing processing technology of medical heart stent - Google Patents
Electrolytic polishing solution for magnesium alloy medical heart stent and surface polishing processing technology of medical heart stent Download PDFInfo
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Abstract
The invention relates to an electrolytic polishing solution for a magnesium alloy medical heart stent and a surface polishing processing technology of the medical heart stent. The electrolytic polishing solution for the medical heart stent is prepared from alcohol and acid. The magnesium alloy surface polishing processing technology of the medical heart stent comprises the first step of mechanical grinding and polishing, the second step of oil and dirt removing, the third step of ultrasonic vibrating and alkali washing, the fourth step of electrolytic polishing, the fifth step of ultrasonic vibrating and alcohol washing and the sixth step of drying and vacuum sealing storage. A product obtained through the fifth step is dried, and a finished magnesium alloy heart stent with the bright mirror surface is obtained and is stored by a vacuum package bag in a sealed manner. By means of the technical scheme, firstly, chromic anhydride large in toxicity and serious in pollution is not contained, the processing difficulty of the waste polishing solution is lowered, the environment pollution is reduced, and the polishing solution is environmentally friendly; secondly, the requirement of the polishing technology for the temperature range is not high, the effect of polishing the bright mirror surface can be achieved under the room temperature, and therefore the operation cost is greatly reduced; and thirdly, reaction time is short and is 1-10 min. Compared with a traditional polishing technology, the polishing electrolysis time can be greatly shortened, and accordingly energy consumption is effectively reduced.
Description
Technical field
The present invention relates to a kind of polishing liquid for metal surface, particularly relate to a kind of magnesium alloy medical cardiac stent electrolytic polishing liquid and surface polishing process thereof.
Background technology
In recent years, magnesium alloy obtains people's research extensively and profoundly as a kind of biodegradable embedded material, magnesium is the indispensability trace element maintaining human metabolism, be present in the various tissue of human body, participate in multiple biological respinse, there is good biocompatibility and excellent mechanical property, become the preferred material of degradable angiocarpy bracket.
But, a lot of bad biological respinse can be produced due in the process that through metal and the blood of surface irregularity directly contact, such as timbering material surface platelet aggregation, adhesion, distortion, blood coagulation system, fibrinolytic system activate, thus cause forming thrombus and intimal hyperplasia, and then cause congee sample arteriosclerosis, therefore, surface finish is carried out to magnesium alloy sample very necessary.
Magnesium alloy polishing can be divided into mechanical polishing, chemical rightenning and electropolishing three kinds of processing methodes, is not suitable for the complex-shaped workpiece such as such as magnesium alloy bracket for mechanical polishing; Chemical rightenning cost is low, has no special requirements to the geometrical shape of workpiece, but quality of finish controllability is poor, is unfavorable for batch production; The advantage of electrochemical etching relative chemical polishing is, production efficiency is high, equipment cost is low, workpiece surface roughness is low, the electrolytic solution life-span is long and the advantage such as can to use continuously.
Electrochemical etching, to be thrown workpiece for anode, insoluble petal is negative electrode, the two poles of the earth are immersed in electrolyzer simultaneously, pass to direct current ionization reaction and produce selectively anode dissolution, thus reach the effect that workpiece surface removes trickle burr and luminance brightness increase, electrochemical etching has become the important technical controlling Metal Surface Roughness, but there is itself cost in magnesium alloy angiocarpy bracket, the restriction of material and shape and the requirement to degradation rate, the support glossing that simultaneously can improve material surface planeness and erosion resistance also rarely has report.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of magnesium alloy medical cardiac stent electrolytic polishing liquid and surface polishing process thereof, pass through the technical program, for existing electrochemical polishing method Problems existing, the electrolytic polishing liquid of the magnesium alloy medical cardiac stent providing a kind of cost low and the magnesium alloy medical cardiac stent surface polishing process that a kind of technique is simple, production efficiency is high, thus effectively make up the deficiencies in the prior art.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of magnesium alloy medical cardiac stent electrolytic polishing liquid, be made up of alcohol and acid, the volume ratio of described acid and alcohol is 1:9 ~ 25:1.
Described acid be selected from massfraction be 68% nitric acid or massfraction be any one in the phosphoric acid of 85%.
It is any one or any one above combination in analytically pure methyl alcohol, ethanol and glycerol that described alcohol is selected from concentration.
The technical program comprises additive, and described additive is the combination of any one or citric acid and two kinds, copper sulfate in citric acid and copper sulfate.
A magnesium alloy surface polishing processing technique for magnesium alloy medical cardiac stent, comprises the following steps:
magnesium alloy cardiac stent work in-process are carried out grinding and polishing by polished machine #2000 sand paper by Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, then carry out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm;
degrease process: above-mentioned steps
the degreaser that middle products obtained therefrom uses carries out the process that degreases, degreaser is one or more combinations in grease-removing agent, ethanol, acetone, clean 1 ~ 30 minute under ultrasonic vibration, during ultrasonic vibration, temperature is 1 ~ 40 DEG C, is beneficial to the greasy dirt removing magnesium alloy medical cardiac stent surface of semi-finished;
ultrasonic vibration alkali cleaning: above-mentioned steps
products obtained therefrom utilizes alkaline wash to carry out ultrasonic vibration alkali cleaning, and alkaline concentration is 0.2 ~ 3.0mol/L, and the ultrasonic vibration time is 1 ~ 10 minute, and ultrasonic vibration temperature is 1 ~ 50 DEG C;
electrochemical etching: during operation, magnesium alloy medical cardiac stent work in-process are connect positive source as anode, connects power cathode using the electro-conductive material that resistance to polishing fluid corrodes as negative electrode, above-mentioned steps
products obtained therefrom puts into electrolytic polishing liquid described in claim 1-4 any one, and carries out electrochemical etching with for anode, and when carrying out electrochemical etching, temperature is 1 ~ 80 DEG C, and voltage is 0 ~ 15V, and polishing time is 1 ~ 10 minute;
ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after carrying out electrochemical etching are placed in dehydrated alcohol and carry out ultrasonic vibration alcohol wash, the ultrasonic vibration alcohol wash time is 1 ~ 30 minute, and during ultrasonic vibration alcohol wash, temperature is 1 ~ 50 DEG C;
dry and vacuum-sealing preservation: by above-mentioned steps
products obtained therefrom is dried, and obtains the magnesium alloy cardiac stent finished product of surperficial bright in mirror surface, preserves with vacuum seal pack sealing.
Above-mentioned steps
middle ultrasonic vibration alkaline wash is one or more the combination in sodium hydroxide, potassium hydroxide, sodium carbonate.
Above-mentioned steps
electropolishing in the electro-conductive material of resistance to polishing fluid corrosion be platinum electrode or graphite, and connect power cathode as negative electrode.
Above-mentioned steps
described in dry be adopt filter paper absorbing surface residual liquid, and utilize heated compressed air or hair dryer directly to dry up magnesium alloy medical cardiac stent surface of semi-finished fast at 30 DEG C of-50 DEG C of temperature.
Beneficial effect after employing technique scheme is: a kind of magnesium alloy medical cardiac stent electrolytic polishing liquid and surface polishing process thereof, be compared with the prior art by the technical program, have the following advantages:
1. the polishing fluid in the technical program, compared with existing electrolytic polishing liquid, not containing large, the with serious pollution chromic trioxide of toxicity, reduces polishing liquid waste disposal difficulty, decreases environmental pollution, belong to feature of environmental protection polishing fluid.
2. in the technical program glossing to a wider range of temperature requirement pine, the effect of bright in mirror surface of at room temperature can dishing out thus greatly reduce operating cost.
3. the glossing reaction times in the technical program is short, in 1 ~ 10 minute, compared with traditional glossing, can significantly shorten polishing electrolysis time, thus effectively reduce energy consumption.
Accompanying drawing explanation
Fig. 1 is the Electronic Speculum figure of the present invention's electrochemical etching effect and non-polishing product control group under different electrolytic polishing liquid.
Fig. 2 be the present invention under electrolytic polishing liquid of the same race during different polishing electric current AFM figure.
With the long period of soaking erosion profile figure of non-polishing product when Fig. 3 is different polishing electric current under the embodiment of the present invention three electrolytic polishing liquid.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
The magnesium alloy medical cardiac stent electrolytic polishing liquid that the present invention relates to, is made up of alcohol and acid, and the volume ratio of described acid and alcohol is 1:9 ~ 25:1.
Described acid be selected from massfraction be 68% nitric acid or massfraction be any one in the phosphoric acid of 85%.
It is any one or any one above combination in analytically pure methyl alcohol, ethanol and glycerol that described alcohol is selected from concentration.
The technical program comprises additive, and described additive is the combination of any one or citric acid and two kinds, copper sulfate in citric acid and copper sulfate.
A magnesium alloy surface polishing processing technique for magnesium alloy medical cardiac stent, comprises the following steps:
magnesium alloy cardiac stent work in-process are carried out grinding and polishing by polished machine #2000 sand paper by Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, then carry out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm;
degrease process: above-mentioned steps
the degreaser that middle gained half product uses carries out the process that degreases, degreaser is one or more combinations in grease-removing agent, ethanol, acetone, clean 1 ~ 30 minute under ultrasonic vibration, during ultrasonic vibration, temperature is 1 ~ 40 DEG C, is beneficial to the greasy dirt removing magnesium alloy medical cardiac stent surface of semi-finished;
ultrasonic vibration alkali cleaning: above-mentioned steps
products obtained therefrom utilizes alkaline wash to carry out ultrasonic vibration alkali cleaning, and alkaline concentration is 0.2 ~ 3.0mol/L, and the ultrasonic vibration time is 1 ~ 10 minute, and ultrasonic vibration temperature is 1 ~ 50 DEG C;
electrochemical etching: during operation, magnesium alloy medical cardiac stent work in-process are connect positive source as anode, connects power cathode using the electro-conductive material that resistance to polishing fluid corrodes as negative electrode, above-mentioned steps
products obtained therefrom puts into electrolytic polishing liquid described in claim 1-4 any one, and carries out electrochemical etching with for anode, and when carrying out electrochemical etching, temperature is 1 ~ 80 DEG C, and voltage is 0 ~ 15V, and polishing time is 1 ~ 10 minute;
ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after carrying out electrochemical etching are placed in dehydrated alcohol and carry out ultrasonic vibration alcohol wash, the ultrasonic vibration alcohol wash time is 1 ~ 30 minute, and during ultrasonic vibration alcohol wash, temperature is 1 ~ 50 DEG C;
dry and vacuum-sealing preservation: by above-mentioned steps
products obtained therefrom is dried, and obtains the magnesium alloy cardiac stent finished product of surperficial bright in mirror surface, preserves with vacuum seal pack sealing.
Above-mentioned steps
middle ultrasonic vibration alkaline wash is one or more the combination in sodium hydroxide, potassium hydroxide, sodium carbonate.
Above-mentioned steps
electropolishing in the electro-conductive material of resistance to polishing fluid corrosion be platinum electrode or graphite, and connect power cathode as negative electrode.
Above-mentioned steps
described in dry be adopt filter paper absorbing surface residual liquid, and utilize heated compressed air or hair dryer directly to dry up magnesium alloy medical cardiac stent surface of semi-finished fast at 30 DEG C of-50 DEG C of temperature.
By above step, adopt the magnesium alloy medical cardiac stent work in-process of same size, under three kinds of different polishing fluids, carry out the repeatedly experiment of different polishing electric current and polishing time, the experiment proved that, effectively can remove by the technical program the Mg alloy surface cut that mechanical polishing causes, eliminate and contact the oxide film formed with air, make specimen sample reach the effect of bright in mirror surface, obtain the magnesium alloy medical cardiac stent finished product that quality of finish is higher, more smooth, corrosion resistance nature is more excellent.
Embodiment one
The magnesium alloy medical cardiac stent surface polishing process of the embodiment of the present invention one, carries out according to the following steps.
A. Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, by polished machine grinding and polishing to #2000 sand paper, then carries out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm.B. degrease process: be that analytically pure acetone joins in the beaker of 1000ml by 200ml concentration, in step a, gained work in-process are placed in beaker, and at 25 DEG C, ultrasonic vibration cleans 30 minutes.C. ultrasonic vibration alkali cleaning: in the 1000ml beaker filling 150ml deionized water, adding 1.0g concentration is that analytically pure sodium hydroxide is mixed with alkali lye, and gained work in-process in step b are placed in beaker, and at 45 DEG C, ultrasonic vibration cleans 2 minutes.
D. the preparation of electrolytic polishing liquid: be analytically pure phosphoric acid solution by 650ml concentration, 250ml concentration is that analytically pure glycerin solution joins in 1000ml beaker, adding purity is analytically pure citric acid 0.6g, copper sulfate 0.5g, leaves standstill after obtaining electrolytic polishing liquid 900ml after stirring.
E. electrochemical etching: connect positive source as anode using magnesium alloy medical cardiac stent work in-process, graphite is that negative electrode connects power cathode and carries out electrochemical etching, the processing parameter of electrochemical etching: electrochemical etching temperature is 40 DEG C, voltage 5.0V, electrochemical etching 5 minutes.
F. ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after electropolishing are placed in the 500ml beaker filling 300ml dehydrated alcohol, and the ultrasonic vibration time is 15 minutes, and ultrasonic vibration temperature is 30 DEG C.
G. dry and vacuum-sealing preservation: the magnesium alloy medical cardiac stent work in-process electricity consumption after ultrasonic alcohol wash is dried up surface, obtains the magnesium alloy medical cardiac stent product of surperficial bright in mirror surface, preserve with vacuum seal pack sealing.
Embodiment two
The magnesium alloy medical cardiac stent surface polishing process of the embodiment of the present invention two, carries out according to the following steps.
A. Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, by polished machine grinding and polishing to #2000 sand paper, then carries out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm.
B. degrease process: be that analytically pure acetone joins in the beaker of 1000ml by 200ml concentration, gained work in-process in step a are placed in beaker, at 45 DEG C, ultrasonic vibration cleans 20 minutes.
C. ultrasonic vibration alkali cleaning: in the 1000ml beaker filling 150ml deionized water, adding 2.0g concentration is that analytically pure sodium hydroxide is mixed with alkali lye, and gained work in-process in step b are placed in beaker, and at 40 DEG C, ultrasonic vibration cleans 2 minutes.
D. the preparation of electrolytic polishing liquid: be analytically pure phosphoric acid solution by 300ml concentration, 700ml concentration is that analytically pure ethanolic soln joins in 1500ml beaker, adding purity is analytically pure citric acid 0.6g, copper sulfate 0.5g, leaves standstill after obtaining electrolytic polishing liquid 1000ml after stirring.
E. electrochemical etching: connect positive source as anode using magnesium alloy medical cardiac stent work in-process, graphite is that negative electrode connects power cathode and carries out electrochemical etching, the processing parameter of electrochemical etching: electrochemical etching temperature is 50 DEG C, voltage 8.0V, electrochemical etching 4 minutes.
F. ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after electropolishing are placed in the 500ml beaker filling 300ml dehydrated alcohol, and the ultrasonic vibration time is 20 minutes, and ultrasonic vibration temperature is 30 DEG C.
G. dry and vacuum-sealing preservation: the magnesium alloy medical cardiac stent work in-process electricity consumption after ultrasonic alcohol wash is dried up surface, obtains the magnesium alloy medical cardiac stent product of surperficial bright in mirror surface, preserve with vacuum seal pack sealing.
Embodiment three
The magnesium alloy medical cardiac stent surface polishing process of the embodiment of the present invention three, carries out according to the following steps.
A. Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, by polished machine grinding and polishing to #2000 sand paper, then carries out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm.
B. degrease process: be that analytically pure acetone joins in the beaker of 1000ml by 200ml concentration, in step a, gained work in-process are placed in beaker, and at 25 DEG C, ultrasonic vibration cleans 30 minutes.
C. ultrasonic vibration alkali cleaning: in the 1000ml beaker filling 150ml deionized water, adding 1.5g concentration is that analytically pure sodium hydroxide is mixed with alkali lye, and gained work in-process in step b are placed in beaker, and at 45 DEG C, ultrasonic vibration cleans 3 minutes.
D. the preparation of electrolytic polishing liquid: be analytically pure phosphoric acid solution by 250ml concentration, 10ml concentration is analytically pure glycerin solution and 750ml concentration is that analytically pure ethanolic soln joins in 1500ml beaker, adding purity is analytically pure citric acid 0.6g, copper sulfate 0.5g, leaves standstill after obtaining electrolytic polishing liquid 1000ml after stirring.
E. electrochemical etching: connect positive source as anode using magnesium alloy medical cardiac stent work in-process, graphite is that negative electrode connects power cathode and carries out electrochemical etching, the processing parameter of electrochemical etching: electrochemical etching temperature is 70 DEG C, voltage 10.0V, electropolishing 4 minutes.
F. ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after electropolishing are placed in the 500ml beaker filling 300ml dehydrated alcohol, and the ultrasonic vibration time is 30 minutes, and ultrasonic vibration temperature is 30 DEG C.
G. dry and vacuum-sealing preservation: the magnesium alloy medical cardiac stent work in-process electricity consumption after ultrasonic alcohol wash is dried up surface, obtains the magnesium alloy medical cardiac stent product of surperficial bright in mirror surface, preserve with vacuum seal pack sealing.
Fig. 1 is that the present invention is under the different embodiment electrolytic polishing liquids of three embodiments, different polishing time, the electrochemical etching effect of polishing electric current and the Electronic Speculum figure of non-polishing product control group, show from result, be 0.1A at polishing electric current, when polishing time is 3min, polishing is carried out not exclusively, and surface still has certain roughness; Be 0.2A at polishing electric current, when polishing time is 6-9min, surface is destroyed again, occurs the phenomenon that polishing is excessive; Be 6-9min at polishing time, when polishing electric current is 0.1A, three kinds of polishing fluids of embodiment all obtain good polishing effect, surface is comparatively smooth, in the careful contrast by three embodiments, the electrolytic solution polishing effect of enforcement three is relatively best, and conclusion and non-polishing specimen surface have obvious cut, and after polishing, specimen surface flat smooth cut significantly reduces.
Fig. 2 is that the present invention is 0.1A, 0.15A, 0.2A at polishing electric current respectively under embodiment three electrolytic polishing liquid, AFM figure when polishing time is 5min.Result shows: after three groups of polishings, sample roughness Ra is respectively 5.02nm, 8.35nm, 4.41nm, has lower roughness, better when polishing electric current is 0.1A, 0.2A, and non-glazed surface has obvious cut, and roughness is higher, unavailable AFM test.
Fig. 3 is the present invention is 0.1A, 0.15A, 0.2A at polishing electric current respectively under embodiment three electrolytic polishing liquid, with the long period of soaking erosion profile figure of non-polishing product when polishing time is 5min, show from result: polishing and non-polishing all show as non-uniform corrosion Hank ' s simulated body fluid, after polishing, obtain certain delaying to a certain extent relative to unpolished erosion rate.
In sum, use embodiment three electrolytic polishing liquid, be 0.1A at polishing electric current, when polishing time is 5-9min, can obtain the surface of comparatively smooth, surfaceness is lower, best results.
The above, be only better possible embodiments of the present invention, and be not used to limit protection scope of the present invention.
Claims (8)
1. a magnesium alloy medical cardiac stent electrolytic polishing liquid, is characterized in that, is made up of alcohol and acid, and the volume ratio of described acid and alcohol is 1:9 ~ 25:1.
2. magnesium alloy medical cardiac stent electrolytic polishing liquid according to claim 1, is characterized in that, described acid be selected from massfraction be 68% nitric acid or massfraction be any one in the phosphoric acid of 85%.
3. magnesium alloy medical cardiac stent electrolytic polishing liquid according to claim 1, is characterized in that, it is any one or any one above combination in analytically pure methyl alcohol, ethanol and glycerol that described alcohol is selected from concentration.
4. magnesium alloy medical cardiac stent electrolytic polishing liquid according to claim 1, is characterized in that, comprise additive, and described additive is the combination of any one or citric acid and two kinds, copper sulfate in citric acid and copper sulfate.
5. a magnesium alloy surface polishing processing technique for magnesium alloy medical cardiac stent, is characterized in that, comprise the following steps:
magnesium alloy cardiac stent work in-process are carried out grinding and polishing by polished machine #2000 sand paper by Mechanical polishing: magnesium alloy materials is made magnesium alloy medical cardiac stent work in-process by Linear cut, then carry out grinding and polishing with the diamond polishing cream that diameter is 0.25 μm;
degrease process: above-mentioned steps
the degreaser that middle products obtained therefrom uses carries out the process that degreases, degreaser is one or more combinations in grease-removing agent, ethanol, acetone, clean 1 ~ 30 minute under ultrasonic vibration, during ultrasonic vibration, temperature is 1 ~ 40 DEG C, is beneficial to the greasy dirt removing magnesium alloy medical cardiac stent surface of semi-finished;
ultrasonic vibration alkali cleaning: above-mentioned steps
products obtained therefrom utilizes alkaline wash to carry out ultrasonic vibration alkali cleaning, and alkaline concentration is 0.2 ~ 3.0mol/L, and the ultrasonic vibration time is 1 ~ 10 minute, and ultrasonic vibration temperature is 1 ~ 50 DEG C;
electrochemical etching: during operation, magnesium alloy medical cardiac stent work in-process are connect positive source as anode, connects power cathode using the electro-conductive material that resistance to polishing fluid corrodes as negative electrode, above-mentioned steps
products obtained therefrom puts into electrolytic polishing liquid described in claim 1-4 any one, and carries out electrochemical etching with for anode, and when carrying out electrochemical etching, temperature is 1 ~ 80 DEG C, and voltage is 0 ~ 15V, and polishing time is 1 ~ 10 minute;
ultrasonic vibration alcohol wash: the magnesium alloy medical cardiac stent work in-process after carrying out electrochemical etching are placed in dehydrated alcohol and carry out ultrasonic vibration alcohol wash, the ultrasonic vibration alcohol wash time is 1 ~ 30 minute, and during ultrasonic vibration alcohol wash, temperature is 1 ~ 50 DEG C;
dry and vacuum-sealing preservation: by above-mentioned steps
products obtained therefrom is dried, and obtains the magnesium alloy cardiac stent finished product of surperficial bright in mirror surface, preserves with vacuum seal pack sealing.
6. the magnesium alloy surface polishing processing technique of magnesium alloy medical cardiac stent according to claim 5, is characterized in that: above-mentioned steps
middle ultrasonic vibration alkaline wash is one or more the combination in sodium hydroxide, potassium hydroxide, sodium carbonate.
7. the magnesium alloy surface polishing processing technique of magnesium alloy medical cardiac stent according to claim 5, is characterized in that: above-mentioned steps
electropolishing in the electro-conductive material of resistance to polishing fluid corrosion be platinum electrode or graphite, and connect power cathode as negative electrode.
8. the magnesium alloy surface polishing processing technique of magnesium alloy medical cardiac stent according to claim 5, is characterized in that: above-mentioned steps
described in dry be adopt filter paper absorbing surface residual liquid, and utilize heated compressed air or hair dryer directly to dry up magnesium alloy medical cardiac stent surface of semi-finished fast at 30 DEG C of-50 DEG C of temperature.
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| CN105603500A (en) * | 2016-01-13 | 2016-05-25 | 上海轻合金精密成型国家工程研究中心有限公司 | Electrolytic polishing agent and electrolytic polishing method for pretreatment of magnesium alloy residual stress test |
| CN106544714A (en) * | 2016-10-21 | 2017-03-29 | 郑州大学 | A kind of preparation method of medical magnesium alloy surface coating |
| CN106567122A (en) * | 2017-02-17 | 2017-04-19 | 大博医疗科技股份有限公司 | Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy |
| CN107313031A (en) * | 2017-06-28 | 2017-11-03 | 西安理工大学 | A kind of chemical nickel-plating method for surface for improving corrosion stability of magnesium alloy |
| CN108193260A (en) * | 2018-01-26 | 2018-06-22 | 北京大学深圳研究院 | A kind of magnesium alloy blood vessel rack processing of surface polishing and auxiliary body |
| CN110129871A (en) * | 2018-02-02 | 2019-08-16 | 上海釜强智能科技有限公司 | A kind for the treatment of process of non-chromium electrolytic polishing solution |
| CN110919115A (en) * | 2019-12-13 | 2020-03-27 | 南京航空航天大学 | Phosphoric acid-ethanol mixed electrolyte for micro-electrolysis linear cutting and polishing and method thereof |
| CN111270240A (en) * | 2020-01-20 | 2020-06-12 | 东南大学泰州生物医药与医疗器械研究院 | Two-step polishing method of magnesium alloy intravascular stent and polishing solution thereof |
| CN111455447A (en) * | 2020-05-28 | 2020-07-28 | 四川大学 | Self-expandable interventional valve stent and surface treatment method thereof |
| CN114395763A (en) * | 2021-12-15 | 2022-04-26 | 创美得医疗器械（天津）有限公司 | Surface cleaning process suitable for magnesium alloy implant |
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| CN105603500A (en) * | 2016-01-13 | 2016-05-25 | 上海轻合金精密成型国家工程研究中心有限公司 | Electrolytic polishing agent and electrolytic polishing method for pretreatment of magnesium alloy residual stress test |
| CN106544714A (en) * | 2016-10-21 | 2017-03-29 | 郑州大学 | A kind of preparation method of medical magnesium alloy surface coating |
| CN106567122A (en) * | 2017-02-17 | 2017-04-19 | 大博医疗科技股份有限公司 | Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy |
| CN107313031B (en) * | 2017-06-28 | 2019-10-25 | 西安理工大学 | A kind of chemical nickel-plating method for surface improving corrosion stability of magnesium alloy |
| CN107313031A (en) * | 2017-06-28 | 2017-11-03 | 西安理工大学 | A kind of chemical nickel-plating method for surface for improving corrosion stability of magnesium alloy |
| CN108193260A (en) * | 2018-01-26 | 2018-06-22 | 北京大学深圳研究院 | A kind of magnesium alloy blood vessel rack processing of surface polishing and auxiliary body |
| CN110129871A (en) * | 2018-02-02 | 2019-08-16 | 上海釜强智能科技有限公司 | A kind for the treatment of process of non-chromium electrolytic polishing solution |
| CN110919115A (en) * | 2019-12-13 | 2020-03-27 | 南京航空航天大学 | Phosphoric acid-ethanol mixed electrolyte for micro-electrolysis linear cutting and polishing and method thereof |
| CN110919115B (en) * | 2019-12-13 | 2021-02-05 | 南京航空航天大学 | Micro-electrolysis linear cutting and polishing method using phosphoric acid-ethanol mixed electrolyte |
| CN111270240A (en) * | 2020-01-20 | 2020-06-12 | 东南大学泰州生物医药与医疗器械研究院 | Two-step polishing method of magnesium alloy intravascular stent and polishing solution thereof |
| CN111270240B (en) * | 2020-01-20 | 2021-12-17 | 东南大学泰州生物医药与医疗器械研究院 | Two-step polishing method of magnesium alloy intravascular stent and polishing solution thereof |
| CN111455447A (en) * | 2020-05-28 | 2020-07-28 | 四川大学 | Self-expandable interventional valve stent and surface treatment method thereof |
| CN114395763A (en) * | 2021-12-15 | 2022-04-26 | 创美得医疗器械（天津）有限公司 | Surface cleaning process suitable for magnesium alloy implant |
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