CN106048705B - Foam chromium and preparation method thereof - Google Patents
Foam chromium and preparation method thereof Download PDFInfo
- Publication number
- CN106048705B CN106048705B CN201610568973.4A CN201610568973A CN106048705B CN 106048705 B CN106048705 B CN 106048705B CN 201610568973 A CN201610568973 A CN 201610568973A CN 106048705 B CN106048705 B CN 106048705B
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- chromium
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- electrolysis bath
- electroetching
- acidic electrolysis
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/08—Etching of refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/14—Etching locally
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The invention discloses a kind of foam chromium, it includes chromium skeleton and positioned at the chromium skeletal internal and multiple pore chamber for penetrating each other.According to the present invention foam chromium be it is a kind of have concurrently high chemical stability, high rigidity, bigger serface, light, heat-proof quality is good, sound insulation value is good the features such as brand-new material.The invention also discloses the preparation method of above-mentioned foam chromium, including step：A, chromium solid will be contained to be placed in acidic electrolysis bath；B, electroetching is carried out to the solid containing chromium, to form chromium skeleton and positioned at the chromium skeletal internal and multiple pore chambers for penetrating each other.Preparation in accordance with the present invention is using acidic electrolysis bath as medium, you can above-mentioned foam chromium is prepared simply by electroetching；The raw material that the preparation method uses is cheap and easy to get, and preparation technology is quick and easy.
Description
Technical field
The invention belongs to porous material technical field, specifically, is related to a kind of foam chromium and preparation method thereof.
Background technology
Crome metal has many characteristics such as high-melting-point, high antioxidant and high antiseptic property, and the density of crome metal is 7.2g/
cm3, fusing point is 1857 DEG C, and boiling point is more than 2480 DEG C.Crome metal has larger hardness simultaneously, and its Brinell hardness is reachable
500kg/cm2~900kg/cm2, Mohs' hardness is suitable with corundum up to 9.0, is only second to diamond.Crome metal is because of its high chemistry
The characteristic of stability and high rigidity, there is the status of uniqueness in the fields such as special material, anti-corrosion and Aero-Space.
But crome metal in general application in, as a kind of bulk metal material, its density is larger, and specific surface area compared with
Small, these deficiencies limit its application；Therefore, if can be by the above-mentioned gold for possessing the features such as high rigidity, high chemical stability
Category chromium is prepared into porous material light, that specific surface area is big, will be a significant contribution to field of porous materials.
The content of the invention
To solve the above-mentioned problems of the prior art, the invention provides a kind of foam chromium and preparation method thereof, the bubble
Foam chromium not only remains the characteristics such as the high chemical stability of crome metal, high rigidity, also has bigger serface, light, thermal insulation concurrently
Can be good, sound insulation value is good the features such as, and the preparation method is simple, it is easily prepared.
In order to reach foregoing invention purpose, present invention employs following technical scheme：
A kind of foam chromium, including chromium skeleton and positioned at the chromium skeletal internal and multiple pore chambers for penetrating each other.
Another object of the present invention also resides in the preparation method for providing a kind of foam chromium as described above, including step：A、
Chromium solid will be contained to be placed in acidic electrolysis bath；B, electroetching is carried out to the solid containing chromium, to form chromium skeleton and positioned at described
Chromium skeletal internal and the multiple pore chambers penetrated each other.
Further, in the step B, electroetching is carried out to the solid containing chromium using square-wave potential method.
Further, when carrying out electroetching to the solid containing chromium using square-wave potential method, working electrode contains chromium to be described
Solid, to any one of the material of electrode in stainless steel, lead, titanium alloy, gold, platinum.
Further, when carrying out electroetching to the solid containing chromium using square-wave potential method, the current potential upper limit is 0.5V~6V,
Current potential lower limit is -6V~3V, and square wave frequency is 0.01Hz~1000Hz, and time of electroetching is 10s~600min, the acidity
The temperature of electrolyte is 20 DEG C~100 DEG C；Wherein, the current potential upper limit and the current potential lower limit using saturated calomel electrode as
Obtained when reference electrode is measured.
Further, it is water-soluble to be selected from aqueous sulfuric acid, aqueous hydrochloric acid solution, aqueous solution of nitric acid, phosphoric acid for the acidic electrolysis bath
In liquid, aqueous citric acid solution, aqueous acetic acid, aqueous ascorbic acid any one or at least two mixing.
Further, the pH of the acidic electrolysis bath is 0~3.
Further, when carrying out electroetching to the solid containing chromium, the acidic electrolysis bath is in flow regime.
Further, the flow during acidic electrolysis bath flowing is no more than 10m3/h。
The present invention is using acidic electrolysis bath as medium, you can foam chromium is prepared simply by electroetching, so as to obtain
It is a kind of have concurrently high chemical stability, high rigidity, bigger serface, the features such as light, heat-proof quality is good, sound insulation value is good it is brand-new
Material.At the same time, the raw material used according to the preparation method of the foam chromium of the present invention is cheap and easy to get, and preparation technology is quickly simple
It is single.
Brief description of the drawings
The following description carried out in conjunction with the accompanying drawings, above and other aspect, feature and the advantage of embodiments of the invention
It will become clearer, in accompanying drawing：
Fig. 1 is the SEM photograph of according to an embodiment of the invention 1 foam chromium；
Fig. 2 is the partial enlarged drawing of a-quadrant in Fig. 1.
Embodiment
Hereinafter, with reference to the accompanying drawings to embodiments of the invention are described in detail.However, it is possible to come in many different forms real
Apply the present invention, and the specific embodiment of the invention that should not be construed as limited to illustrate here.Conversely, there is provided these implementations
Example is in order to explain the principle and its practical application of the present invention, so that others skilled in the art are it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.
The invention discloses a kind of foam chromium, it includes chromium skeleton and penetrated positioned at the chromium skeletal internal and each other more
Individual pore chamber.
The foam chromium not only has the characteristics such as crome metal possessed high chemical stability, high rigidity of block, also simultaneous
Have the features such as bigger serface, light, heat-proof quality is good, sound insulation value is good, be a kind of brand-new material, it can be applicable to heat-insulated
The fields such as material, acoustic material, or carrier as other materials etc..
Hereinafter, the preparation method of the above-mentioned foam chromium of the present invention will be described in detail, according to the foam of the present invention
The preparation method of chromium is referring in particular to following steps：
In step 1, chromium solid will be contained and be placed in acidic electrolysis bath.
Specifically, solid containing chromium can be chromium piece, chromium plate, chromium block or the chromium film layer for being plated in electrode surface；And institute
State acidic electrolysis bath and include but is not limited to aqueous sulfuric acid, aqueous hydrochloric acid solution, aqueous solution of nitric acid, phosphate aqueous solution, citric acid water
Any one in solution, aqueous acetic acid, aqueous ascorbic acid, or above-mentioned at least two mixed solution, only need to protect
The pH value for demonstrate,proving the acidic electrolysis bath is controlled in the range of 0~3.
In step 2, electroetching is carried out to the solid containing chromium, with form chromium skeleton and positioned at the chromium skeletal internal and
The multiple pore chambers penetrated each other.
In the present embodiment, electroetching is carried out to the solid containing chromium using square-wave potential method.Specifically, using three electrodes
System, using the solid containing chromium as working electrode, using saturated calomel electrode as reference electrode, with stainless steel, lead, titanium alloy,
Any one in gold, platinum is as the material to electrode.
More specifically, each electrode is connected, and square wave current potential is applied to working electrode；Join when being used as using saturated calomel electrode
During than electrode, the control of the current potential upper limit be 0.5V~6V, and the control of current potential lower limit be -6V~3V, square wave frequency control be 0.01Hz~
1000Hz, the time of electroetching is 10s~600min, and the temperature of acidic electrolysis bath is 20 DEG C~100 DEG C.
Preferably, when carrying out electroetching to the solid containing chromium so that acidic electrolysis bath keeps flow regime；Namely
Say, ensure that the container for containing acidic electrolysis bath has the passage for being used for flowing in and out acidic electrolysis bath.In this way, on the one hand
Hydrionic supplement on working electrode surface can be accelerated, on the other hand can also wash away the reaction production of working electrode surface generation
Thing.Usually, the flow during acidic electrolysis bath flowing is controlled to be no more than 10m3/ h.
Hereinafter, the preparation method of the foam chromium according to the present invention will be described in detail with reference to specific embodiment,
For convenience of being contrasted to each embodiment, analysis in table form contrasts each embodiment.Foam chromium in embodiment 1-4 is not
It is as shown in table 1 with the comparing result under experiment parameter.
Comparing result of the foam chromium under different experiments parameter in the embodiment 1-4 of table 1
Note：In table 1, " --- " represents do not have, i.e., acidic electrolysis bath does not flow.
Carried out sem test (abbreviation SEM) to the foam chromium that embodiment 1 is prepared, test result such as Fig. 1 and
Shown in Fig. 2.From figure 1 it appears that the surface for the foam chromium that embodiment 1 is prepared is in cellular, amplify a-quadrant therein
Obtain Fig. 2；In figure 2 it can be seen that the foam chromium is including chromium skeleton and positioned at the chromium skeletal internal and penetrates each other more
Individual pore chamber, it is obvious that in fig. 2, pore chamber is larger, causes chromium skeleton more scattered, so that the foam chromium formed is bigger
Present cotton-shaped under the camera lens of multiple, there is larger specific surface area.
Although the present invention has shown and described with reference to specific embodiment, it should be appreciated by those skilled in the art that：
In the case where not departing from the spirit and scope of the present invention limited by claim and its equivalent, can carry out herein form and
Various change in details.
Claims (8)
1. a kind of preparation method of foam chromium, the foam chromium is including chromium skeleton and positioned at the chromium skeletal internal and passes through each other
Logical multiple pore chambers；It is characterised in that it includes step：
A, chromium solid will be contained to be placed in acidic electrolysis bath；
B, electroetching is carried out to the solid containing chromium, to form chromium skeleton and penetrate positioned at the chromium skeletal internal and each other more
Individual pore chamber.
2. preparation method according to claim 1, it is characterised in that in the step B, using square-wave potential method to institute
State solid containing chromium and carry out electroetching.
3. preparation method according to claim 2, it is characterised in that carried out using square-wave potential method to the solid containing chromium
During electroetching, working electrode is the solid containing chromium, to material the appointing in stainless steel, lead, titanium alloy, gold, platinum of electrode
Meaning is a kind of.
4. the preparation method according to Claims 2 or 3, it is characterised in that using square-wave potential method to the solid containing chromium
When carrying out electroetching, the current potential upper limit is 0.5V~6V, and current potential lower limit is -6V~3V, and square wave frequency is 0.01Hz~1000Hz, electricity
The time of etching is 10s~600min, and the temperature of the acidic electrolysis bath is 20 DEG C~100 DEG C；Wherein, the current potential upper limit and
The current potential lower limit obtains when being measured using saturated calomel electrode as reference electrode.
5. preparation method according to claim 1 or 2, it is characterised in that the acidic electrolysis bath be selected from aqueous sulfuric acid,
Appointing in aqueous hydrochloric acid solution, aqueous solution of nitric acid, phosphate aqueous solution, aqueous citric acid solution, aqueous acetic acid, aqueous ascorbic acid
Anticipate a kind of or at least two mixing.
6. preparation method according to claim 5, it is characterised in that the pH of the acidic electrolysis bath is 0~3.
7. preparation method according to claim 1 or 2, it is characterised in that when carrying out electroetching to the solid containing chromium, institute
It is in flow regime to state acidic electrolysis bath.
8. preparation method according to claim 7, it is characterised in that the flow during acidic electrolysis bath flowing is no more than
10m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610568973.4A CN106048705B (en) | 2016-07-19 | 2016-07-19 | Foam chromium and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610568973.4A CN106048705B (en) | 2016-07-19 | 2016-07-19 | Foam chromium and preparation method thereof |
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| CN106048705A CN106048705A (en) | 2016-10-26 |
| CN106048705B true CN106048705B (en) | 2018-01-16 |
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| CN201610568973.4A Active CN106048705B (en) | 2016-07-19 | 2016-07-19 | Foam chromium and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB799245A (en) * | 1954-11-30 | 1958-08-06 | Renault | Improvements in or relating to a process for removing deposits of chromium on articles |
| JP2010209401A (en) * | 2009-03-10 | 2010-09-24 | Nisshin Steel Co Ltd | Method for producing surface-roughened metal material |
| CN103774184A (en) * | 2014-03-05 | 2014-05-07 | 南京工业大学 | Electrolytic preparation method of porous tungsten |
| CN105441983A (en) * | 2015-11-19 | 2016-03-30 | 中国科学院过程工程研究所 | Preparation method for metal chromium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03233000A (en) * | 1990-02-08 | 1991-10-16 | Mitsubishi Heavy Ind Ltd | Production of porous metal |
| CN101831674A (en) * | 2010-02-08 | 2010-09-15 | 长沙力元新材料有限责任公司 | Porous chromium alloy material and preparation method thereof |
| CN102505128A (en) * | 2011-12-23 | 2012-06-20 | 西北有色金属研究院 | Method for directly preparing porous metal product by molten salt electrolysis |
| CN104458851B (en) * | 2014-12-09 | 2018-07-06 | 孚派特环境科技（苏州）有限公司 | A kind of porous three-dimensional electrode material and preparation method thereof |
| CN105603265B (en) * | 2016-03-21 | 2017-10-31 | 中南大学 | Foamy graphite alkene skeleton reinforced aluminum matrix composites and preparation method thereof |
| CN105603248B (en) * | 2016-03-21 | 2018-01-02 | 中南大学 | A kind of foamy graphite alkene skeleton enhancing Cu-base composites and preparation method |
| CN105671354B (en) * | 2016-03-21 | 2017-11-07 | 中南大学 | A kind of foam diamond framework reinforced aluminum matrix composites and preparation method thereof |
-
2016
- 2016-07-19 CN CN201610568973.4A patent/CN106048705B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB799245A (en) * | 1954-11-30 | 1958-08-06 | Renault | Improvements in or relating to a process for removing deposits of chromium on articles |
| JP2010209401A (en) * | 2009-03-10 | 2010-09-24 | Nisshin Steel Co Ltd | Method for producing surface-roughened metal material |
| CN103774184A (en) * | 2014-03-05 | 2014-05-07 | 南京工业大学 | Electrolytic preparation method of porous tungsten |
| CN105441983A (en) * | 2015-11-19 | 2016-03-30 | 中国科学院过程工程研究所 | Preparation method for metal chromium |
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| CN106048705A (en) | 2016-10-26 |
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