CN101968477B - Medical integrated magnesium alloy biodegradability gas-collection measurement device - Google Patents
Medical integrated magnesium alloy biodegradability gas-collection measurement device Download PDFInfo
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- CN101968477B CN101968477B CN201010265162.XA CN201010265162A CN101968477B CN 101968477 B CN101968477 B CN 101968477B CN 201010265162 A CN201010265162 A CN 201010265162A CN 101968477 B CN101968477 B CN 101968477B
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- tube
- gas
- air scoop
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- magnesium alloy
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Abstract
The invention discloses a medical integrated magnesium alloy biodegradability gas-collection measurement device, which comprises a gas measuring tube, a gas guide hood, a plug valve and a flow guide tube, wherein the tube wall of the gas measuring tube is provided with containing marks and lengths marks, and the tube wall of the marked areas is transparent; the gas guide hood is a hollow cone of which two ends are open; and one end of the gas measuring tube is connected with the flow guide tube by the plug valve, while the other end is connected with the small open end of the gas guide hood. The device has the advantages of compact structure, measurement accuracy, convenience of use, high universality and the like, can easily realize the real-time collection and synchronous accurate measurement of insoluble gases produced in a specific area in a liquid medium so as to meet requirements on the fast and accurate measurement of the corrosion degradability of materials, and is particularly applied to the hydrogen-evolution measurement of the biodegradability of degradable biomedical metal materials/devices, such as magnesium alloys and medical device products thereof.
Description
Technical field
The invention belongs to material/apparatus technical field of performance test, relate to the insoluble gas that in a kind of liquid towards medium, specific region produces and with discharge opeing gas collection principle, carry out the device of real-time collecting and synchronous accurate quantification.
Background technology
Discharge opeing gas collection principle is widely utilized in scientific research and experimental teaching.Wherein, for Corrosion Behaviors of Magnesium Alloys barrier propterty as the liberation of hydrogen mensuration of biodegradability evaluation be exactly typical case.Magnesium alloy is when there is degraded in as seawater, simulated body fluid etc. in aqueous medium, and cathodic depolarization reaction be take evolving hydrogen reaction as main, and overall reaction equation is as follows:
If the intermediate steps that may relate to is not considered, above-mentioned overall reaction can be decomposed as follows:
Anodic solution: M → M
n++ ne
-(2)
Cathode hydrogen evolution: 2H
2o+2e
-→ H
2+ 2OH
-(3)
Subsidiary reaction: M
n++ nOH
-→ M (OH)
n(4)
Wherein, in the formula of (1)-(4), M represents the main alloy element in Mg or magnesium alloy.
Electrochemical principle accordingly, insoluble gas---the hydrogen (H that degrades and produce by collection
2) and its volume is carried out quantitatively, and then utilizing the equation of gas state to calculate its amount of substance, association reaction equation (1) can be known anodic solution (corrosion degraded) information of magnesium alloy as calculated afterwards.Therefore, as a kind of gas volumetric method, liberation of hydrogen mensuration is in Corrosion Behaviors of Magnesium Alloys Study on degradation especially 1) catabolite is difficult to thorough removing, or 2) non-homogeneous degraded, or 3) there is special value in the dynamics research that requires based on a large amount of real time datas.In liberation of hydrogen is measured, the collection of hydrogen, be quantitatively that core is crucial.Existing liberation of hydrogen mensuration equipment therefor comprises independently funnel and eudiometer tube (as buret), main operational steps is as follows: sample is put into the container (as beaker) that fills solution, back-off one funnel on container, funnel tail end is back-off one eudiometer tube again, funnel and eudiometer tube are filled solution before experiment starts, and the hydrogen that sample produces, by funnel inlet tracheae, is replaced solution wherein, thereby realize the collection of gas, the gas flow throughput tracheae scale of collecting obtains.Said apparatus and method seem simply, but have following main drawback during practical operation:
1) for the gas that guarantees to be filled solution in funnel and eudiometer tube and arrive by collection funnel finally can inlet tracheae so that metering, funnel osculum end must be positioned at eudiometer tube and the eudiometer tube mouth of pipe must be positioned at below liquid level, causes thus funnel position to be difficult to control because of clamping inconvenience.Unless relied on special-purpose bracing or strutting arrangement, otherwise can only falling within container bottom and container, funnel forms relative closed space, cause: A. affect the mass exchange of the inside and outside solution of funnel, and finally affect the performance test results that is subject to the sample that funnel shrouds; Thereby B. owing to being difficult to adjust in real time the wherein pose of sample, control its effective working area, during accidents such as therefore inclining, fall at sample, easily cause the failure of an experiment.
2) shutoff to sample upper space due to eudiometer tube and funnel, cannot adopt conventional simple " suspension type " load sample method to carry out sample loading, therefore causes series inconvenience, even affects experimental result.
3) owing to limit by funnel and eudiometer tube shape and specification, gas collection amount and measuring accuracy are restricted simultaneously.
4), because convention amount tracheae is without length scale, cause pipe measurement interior, that manage outer liquid level difference to have inconvenience.
Summary of the invention
Object of the present invention is exactly the deficiency for existing method and device, a kind of compact conformation is provided, measures Medical integrated magnesium alloy biodegradability gas-collection measurement device accurate, easy to use, highly versatile.
Above-mentioned purpose of the present invention is achieved through the following technical solutions: a kind of Medical integrated magnesium alloy biodegradability gas-collection measurement device, comprise eudiometer tube, air scoop, stopcock and drainage tube, wherein eudiometer tube tube wall is with capacity scale and length scale respectively, and scale area tube wall is transparent; Air scoop is the cone of hollow and open at both ends; One end of eudiometer tube is connected with drainage tube by stopcock, and the other end is connected with the little opening end of air scoop.
Wall thickness is identical everywhere for described air scoop cover body, and its inner chamber is provided with sample hook.
Described sample hook integral body is " L " type, one end is fixedly connected with air scoop cover body inwall, other end perk, horizontal segment has " one " font band tooth or hangs sample groove with extension sample platform or " V " font in hole, and the central point of extension sample platform or extension sample groove is positioned on the axis of eudiometer tube.
Described drainage tube is hollow ring pipe, and its free end is open type.
Described eudiometer tube, air scoop, stopcock and drainage tube are integrated.
Compare with prior art and equipment, outstanding effect of the present invention is:
1) in eudiometer tube, gas volume can be changed and directly be obtained by liquid level in pipe, and range, precision and sensitivity etc. all can be controlled flexibly by the choice of diameter, is convenient to meet the need of trace or a large amount of gas reaction of formation application.
2) in eudiometer tube pipe, the length scale of the outer liquid level difference of pipe on can throughput tracheae tube wall directly obtain, be convenient to gas actual pressure in pipe to carry out accurate measure.
3) the supporting design of drainage tube and stopcock, is convenient to gas collection test and starts the smooth filling of fluid media (medium) in front eudiometer tube and air scoop.
4) geometrical construction of air scoop can guarantee that the insoluble gas product of separating out finally can be pooled in eudiometer tube smoothly, has avoided the delay at other position; In addition, effective overlay area of air scoop can be by controlling the selection of its big opening end internal diameter flexibly, be convenient to adjust according to the physical size of test specimen effective collecting zone of insoluble gas product, the generation of the phenomenon of can avoiding becoming flat.
5) sample of apparatus integration structural design and special construction hook, is very easy to the installation, fixing of device integral body and test specimen.This device has versatility for gas collection method test material corrosion degradation property, is particularly suitable for degradable medical metal material/apparatus as medical magnesium alloy and prison, the detection in real time and accurately of medical device product biodegradability thereof.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention of carry sample hook.
Fig. 2 is the structural representation that " one " font is hung sample platform.
Fig. 3 is the structural representation that band hole " " font is hung sample platform.
Fig. 4, Fig. 5, Fig. 6 are three kinds of structural representations that band tooth " " font is hung sample platform.
Fig. 7 is the structural representation that band tooth " V " font is hung sample groove.
Fig. 8 is application implementation schematic diagram of the present invention.
In figure: 1-eudiometer tube, 2-air scoop, 3-sample hook, 4-stopcock, 5-drainage tube, 6-containing mark, 7-length scale, 8-test container, 9-tests sample.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention is described further, but enforcement of the present invention and protection domain are not limited to this.
As shown in Figure 1, Medical integrated magnesium alloy biodegradability gas-collection measurement device is comprised of integrated eudiometer tube 1, air scoop 2, stopcock 4 and drainage tube 5.Wherein eudiometer tube 1 tube wall is with respectively containing mark 6 and length scale 7, and scale area tube wall is transparent, therefore in eudiometer tube 1 pipe, gas volume can directly obtain by the variation of liquid level wherein, range, precision, sensitivity all can, by the selection of eudiometer tube 1 caliber is controlled, be convenient to meet the need of trace or a large amount of gas reaction of formation application.On the other hand, eudiometer tube 1 pipe is interior, the outer liquid level difference of pipe can directly be obtained by the length scale on its tube wall, is convenient to gas actual pressure in pipe to carry out accurate measure.Air scoop 2 is the cone of hollow and open at both ends, and cover body everywhere wall thickness is identical, and this geometrical construction of air scoop 2 can guarantee that the insoluble gas product of separating out finally can be pooled in eudiometer tube 1 smoothly, has avoided the delay at other position.Effective overlay area of air scoop 2 can be by controlling the selection of its big opening end internal diameter flexibly, be convenient to effective collecting zone that physical size is per sample adjusted insoluble gas product, the generation of the phenomenon of can avoiding becoming flat.Air scoop 2 inner chambers are provided with the sample hook 3 that integral body is " L " type, and one end of sample hook 3 is fixedly connected with air scoop 2 cover body inwalls, other end perk, and horizontal segment is for hanging sample platform or hanging sample groove.The central point of wherein hanging sample platform or hanging sample groove is positioned on the axis of eudiometer tube, and the insoluble gas product that is conducive to react with surrounding medium loading test specimen on it generation is collected.One end of eudiometer tube 1 is connected with drainage tube 5 by stopcock 4, and its other end is connected with the little opening end of air scoop 2.The supporting design of drainage tube 5 and stopcock 4, is convenient to gas collection test and starts the smooth filling of fluid media (medium) in front eudiometer tube and air scoop.Drainage tube 5 is hollow Bamboo-shaped pipe, and its free end is open type, is convenient to external hose and uses air-breathing instrument and in device, manufacture negative pressure, can guarantee the impermeability of flexible pipe and drainage tube 5 junctions simultaneously.
As shown in Fig. 2-Fig. 7, it is the typical structure schematic diagram of sample hook 3 they " one " fonts extension sample platforms or " V " word extension sample groove.Variation, the structural design of becoming privileged, greatly facilitate the installation, fixing of test specimen, can firmly load one or more test specimens, thereby meet different test needs.
As shown in Figure 8, be enforcement schematic diagram of the present invention.The liberation of hydrogen test that utilizes the present invention to carry out medical magnesium alloy biodegradation of take is example, introduces in detail usage of the present invention as follows: first this device is vertically fixed; The test sample 9 that is drilled with in advance through hole is carried out to the pre-treatments such as metallographic polishing, cleaning, dry, the differential of the arc/anodic oxidation, chemical conversion, bionical passivation, electroless plating, afterwards it is fixed on sample hook 3 by thin nylon wire; The simulated body fluid configuring is poured in test container 8 as Hank ' s liquid etc.; In the simulated body fluid that air scoop 2 is immersed in test container 8; Open stopcock 4; At drainage tube 5 free end external rubber pipes, use air-breathing instrument as the formation negative pressure in device such as ear washing bulb, simulated body fluid is entered and be full of air scoop 2 and eudiometer tube 1; Liquid level in adjustment amount tracheae 1; Cut-out tap valve 4; The position of adjusting gear is positioned at the assigned address of test container 8 to the sample on sample hook 3.With the carrying out of interfacial reaction between simulated body fluid/test specimen, cathode product H
2through air scoop 2, to eudiometer tube 1, collect, discharge solution wherein, cause the liquid level in eudiometer tube 1 to decline.During time t, by the H in containing mark 6 amount to obtain tracheaes 1
2growing amount Δ V (t); By altitude scale 7, obtain and manage interior, pipe outer liquid level difference h (t), H in the initial liquid level recorder calculated amount tracheae 1 of binding capacity tracheae 1
2dividing potential drop P (t), then by Δ V (t), P (t) and gas actual temperature T, according to the equation of gas state, calculate H
2amount of substance, and then calculate H
2generating rate, and finally obtain the information of magnesium alloy biodegradability aspect.
Claims (3)
1. a Medical integrated magnesium alloy biodegradability gas-collection measurement device, comprise eudiometer tube (1), air scoop (2) and drainage tube (5), wherein eudiometer tube (1) scale area tube wall is transparent, air scoop (2) is the cone of hollow and open at both ends, one end of eudiometer tube (1) is connected with drainage tube (5) by stopcock (4), and the other end is connected with the little opening end of air scoop (2); It is characterized in that eudiometer tube (1) tube wall is with respectively containing mark (6) and length scale (7); Wall thickness is identical everywhere for described air scoop (2) cover body, and its inner chamber is provided with sample hook (3); Described sample hook (3) integral body is " L " type, one end is fixedly connected with air scoop (2) cover body inwall, other end perk, horizontal segment has " one " font band tooth or hangs sample groove with extension sample platform or " V " font in hole, and the central point of extension sample platform or extension sample groove is positioned on the axis of eudiometer tube (1).
2. a kind of Medical integrated magnesium alloy biodegradability gas-collection measurement device according to claim 1, is characterized in that: described drainage tube (5) is hollow ring pipe, and its free end is open type.
3. a kind of Medical integrated magnesium alloy biodegradability gas-collection measurement device according to claim 1, is characterized in that: described eudiometer tube (1), air scoop (2), stopcock (4) and drainage tube (5) are integrated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010265162.XA CN101968477B (en) | 2010-08-27 | 2010-08-27 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010265162.XA CN101968477B (en) | 2010-08-27 | 2010-08-27 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101968477A CN101968477A (en) | 2011-02-09 |
| CN101968477B true CN101968477B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010265162.XA Expired - Fee Related CN101968477B (en) | 2010-08-27 | 2010-08-27 | Medical integrated magnesium alloy biodegradability gas-collection measurement device |
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| CN106198129A (en) * | 2016-07-11 | 2016-12-07 | 中国海洋大学 | A kind of example reaction generates gas collector |
| CN111521663B (en) * | 2020-04-29 | 2022-09-27 | 安徽工业大学 | Gas collection and measurement device, electrochemical analysis and measurement system and measurement method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811912U (en) * | 2010-08-27 | 2011-04-27 | 华南理工大学 | Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3657172B2 (en) * | 2000-05-24 | 2005-06-08 | 株式会社日本製鋼所 | Corrosion evaluation method for magnesium alloy materials |
| CN101109692B (en) * | 2007-08-23 | 2011-08-31 | 复旦大学 | Metallic film test piece and its preparing method for estimating and screening museum exhibition stuff |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811912U (en) * | 2010-08-27 | 2011-04-27 | 华南理工大学 | Medical magnesium alloy biodegradation performance integrated gas collecting and measuring device |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2001-330601A 2001.11.30 * |
| 伍沙.生物镁合金腐蚀降解行为研究.《中国优秀硕士学位论文全文数据库》.2009,23-24. * |
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Granted publication date: 20141203 Termination date: 20200827 |