CN109468669A - A method of Ni-Mo composite deposite is deposited in closed-cell foam aluminium surface - Google Patents
A method of Ni-Mo composite deposite is deposited in closed-cell foam aluminium surface Download PDFInfo
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- CN109468669A CN109468669A CN201811569186.7A CN201811569186A CN109468669A CN 109468669 A CN109468669 A CN 109468669A CN 201811569186 A CN201811569186 A CN 201811569186A CN 109468669 A CN109468669 A CN 109468669A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
Abstract
The invention discloses a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, this method comprises: one, be add to deionized water nickel sulfate, sodium molybdate, sodium citrate and ammonium chloride to obtain electrolyte；Two, inject the electrolyte into the electrolytic cell of electrodeposition apparatus, respectively by closed-cell aluminum foam, nickel plate be connected to electrodeposition apparatus power cathode and anode and submerge carry out electro-deposition in the electrolytic solution, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam.The present invention prepares Ni-Mo composite deposite using the electric current self-regulating function of pressure stabilizing electro-deposition, improve the covering power to closed-cell aluminum foam, improve the quality of Ni-Mo composite deposite, complete uniform, compact structure Ni-Mo composite deposite is obtained, the performances such as density, corrosion resistance, yield strength, the size of plateau stress, unit volume absorption energy to improve closed-cell aluminum foam, expand the application field of closed-cell aluminum foam.
Description
Technical field
The invention belongs to process for modifying surface fields, and in particular to a kind of compound in closed-cell foam aluminium surface deposition Ni-Mo
The method of coating.
Background technique
Foamed aluminium is a kind of lightweight functional material, due to its Superlight and higher specific strength and specific surface area, by
To the extensive concern of people.It not only has lightweight nature possessed by porous material, also has excellent possessed by metal
The physical properties such as mechanical property and heat, electricity.Foamed aluminium has excellent heat-conductive characteristic, heat-resisting, energy-absorbing, sound absorption, sound insulation and electricity
The advantages that magnetic screen.Keep it more in communications and transportation, building machinery, chemical metallurgy, telecommunications, aerospace, military equipment etc.
A field has broad application prospects.For closed-cell aluminum foam, because large number of orifices hole is distributed with inside it, though it will lead to the strong of aluminium
The mechanical properties such as degree, rigidity decrease, but its energy absorption ability greatly improves, can be several especially in collision energy-absorbing field
Constant pressure effect is lower to carry out energy absorption, this is that the material of general structure is difficult to realize, therefore foamed aluminium is in vapour
In turner industry with development potential.
However foamed aluminium self-strength hardness is low, the disadvantages of poor corrosion resistance, limits it in the application neck of special dimension
Domain.For example, when foamed aluminium participates in ocean work for marine vehicles such as ships, since aluminium corrosion resistance is poor, Hai Ping
Face seawater below and salt fog in water and microorganism can all generate corrosion to it and destroy hull, therefore, to foamed aluminium into
Row surface treatment shows particularly important to improve its corrosion resistance；When foamed aluminium is applied to automobile industry, foamed aluminium can
Substitute original energy-absorbing material acrylic resin as packing material as liner, whippletree and the bracket in bumper assembly,
Energy is more effectively absorbed when automobile collides, protects car light, reduces loss.Therefore, coating is prepared in foam aluminium surface
There is important research significance to improve corrosion resistance and the mechanical performance of foamed aluminium.
Ni-Mo alloy is widely used in protective coating because of its excellent mechanical performance, corrosion resistance, wearability,
It includes being used as corrosion resistance coating, abrasion coating and thermostabilization coating etc., thus people in the concrete application of engineering in practice
Extensive research is carried out to the preparation of Ni-Mo alloy, the method for preparing Ni-Mo coating has very much, including chemical plating, colloidal sol-are solidifying
Glue method, vapour deposition process etc., wherein the method for electro-deposition passes through control because that preparation method is simple and easy is especially noticeable
The Ni-Mo alloy deposition layer of superior performance can be made in electrodeposition condition (plating solution composition, temperature, PH, current density etc.).Dan Jin
Category molybdenum cannot have from aqueous solution electrodeposition, but in plating solution can induce itself and nickel ion co-deposition when citrate ion, electricity is heavy
Product goes out Ni-Mo alloy.At this stage, Most scholars use the method for current stabilization all to prepare coating, but are mostly suitable for matrix
The alloy of plate, the metal covering power with special hilum structure this for foamed aluminium are not good enough.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide one kind in closed-cell foam
The method of aluminium surface deposition Ni-Mo composite deposite.This method has the function of electric current self-regulation in closed pore using pressure stabilizing electro-deposition
Foam aluminium surface prepares Ni-Mo composite deposite, improves the covering power to closed-cell aluminum foam, improves Ni-Mo composite deposite
Quality, obtained it is complete uniformly, the Ni-Mo composite deposite of compact structure, to improve the density of closed-cell aluminum foam, corrosion resistant
Corrosion energy, yield strength, plateau stress, unit volume absorb the performances such as the size of energy, expand the application of closed-cell aluminum foam
Field.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of to deposit Ni- in closed-cell foam aluminium surface
The method of Mo composite deposite, which is characterized in that method includes the following steps:
Step 1: being add to deionized water nickel sulfate, sodium molybdate, sodium citrate and ammonium chloride to obtain electrolyte；Institute
The concentration for stating nickel sulfate in electrolyte is 0.23mol/L~0.38mol/L, the concentration of sodium molybdate be 0.012mol/L~
0.034mol/L, the concentration of sodium citrate are 0.45mol/L~0.65mol/L, the concentration of ammonium chloride be 0.68mol/L~
0.80mol/L；
Step 2: electrolyte obtained in step 1 is injected into the electrolytic cell of electrodeposition apparatus, by closed-cell aluminum foam
It is connected to the power cathode of electrodeposition apparatus and submerges in the electrolytic solution, nickel plate is connected to the power anode of electrodeposition apparatus simultaneously
Submergence in the electrolytic solution, then carries out electro-deposition, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam；The electricity
The voltage of deposition is 3.0V~5.3V, and the time is 10min~50min.
The present invention prepares Ni-Mo composite deposite, electrodeposition process on the surface of closed-cell aluminum foam using the method for electro-deposition
The middle electrolyte used is citrate system electrolyte, and the sodium molybdate in the citrate system electrolyte is as offer molybdic acid
The main salt of radical ion, nickel sulfate provide the main salt of nickel ion as to plating solution, and complexing agent is played the role of in the addition of sodium citrate,
Since molybdenum cannot be precipitated out from aqueous solution, but can be realized under the action of complexing agent along with iron family element nickel coprecipitated
Product, so that Ni-Mo composite deposite is prepared, and ammonium chloride makes electrodeposition process larger as the brightener in electrodeposition process
Current density under carry out, and the degree of dissociation of nickel sulfate can be reduced, reduce the hydrolysis degree of nickel sulfate, improve coating, thus
Bright Ni-Mo composite deposite is obtained, avoids generating point, improves the leveling performance of Ni-Mo composite deposite, while chloride ion
Cathodic polarization effect is also increased, coating internal stress is reduced, therefore using the electrolyte of mentioned component and concentration, is obtained
Ni-Mo composite deposite even compact and binding force is strong, it is not easily to fall off.The present invention prepares coating using the electro-deposition method of pressure stabilizing,
Since pressure stabilizing electrocasting/electrodeposition mode has the function of electric current self-regulation, so that the cathode-current density at closed-cell aluminum foam shrinkage pool becomes
Greatly, so that there is the metal ion at closed-cell aluminum foam shrinkage pool sufficiently large cathodic polarization value to carry out electro-deposition, cathode negative potential
Increase, the deposition potential of metal becomes just relatively, and closed-cell aluminum foam covering power improves, and electro-deposition later period electric current tends to be steady
It is fixed, the covering power to closed-cell aluminum foam is further improved, complete uniform Ni-Mo composite deposite has been obtained；And it selects
Voltage is constant pressure electro-deposition under conditions of 3.0V~5.3V, has both improved the driving force of Ni-Mo composite deposite particle forming core, thus
The deposition velocity for improving composite deposite, in turn avoiding overtension causes the metal ion velocity of discharge to be accelerated, so as to cause
Metal ion relatively lags behind in the diffusion velocity of closed-cell foam aluminium surface, and forming core is caused to accumulate, and coating particle is coarse and coating
Cracked problem, while avoiding closed-cell foam aluminium surface and the phenomenon that Partial ablation occur because voltage is excessive；Pressure stabilizing electricity
The time of deposition is set to 10min~50min, has both avoided that electrodeposition time is too short to cause Ni-Mo composite deposite that cannot cover completely
Lid closed-cell foam aluminium surface, in turn avoids that electrodeposition time is too long to cause Ni-Mo composite deposite blocked up, thus Ni-Mo Composite Coatings
Crackle caused by layer internal stress is excessive.
A kind of above-mentioned method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that step 1 institute
The concentration for stating nickel sulfate in electrolyte is 0.35mol/L, and the concentration of sodium molybdate is 0.027mol/L, and the concentration of sodium citrate is
0.53mol/L, the concentration of ammonium chloride are 0.72mol/L.The electrolyte of above-mentioned preferred each component concentration, the Ni- being prepared
Mo composite deposite quality is good and flawless.
A kind of above-mentioned method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that in step 2
The distance between the closed-cell aluminum foam and nickel plate are 5cm.5cm is set by the distance between closed-cell aluminum foam and nickel plate, is kept away
Exempted from apart from too small caused ablation phenomen, in turn avoid apart from it is excessive it is caused be not easy electro-deposition phenomenon, be conducive in closed pore
Uniform Ni-Mo composite deposite is prepared on foamed aluminium.
A kind of above-mentioned method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that in step 2
The temperature that electrolyte is controlled during the electro-deposition is 30 DEG C.Temperature by controlling electrolyte is 30 DEG C, avoids electricity
Solution liquid temperature is excessively high to cause the crystallization of Ni-Mo composite deposite thicker, in turn avoids that electrolyte temperature is too low to be caused under electrolyte property
Drop, cause current efficiency reduce, the deposition rate of Ni-Mo composite deposite it is slack-off, so as to cause plated film production efficiency it is low,
The preparation efficiency of Ni-Mo composite deposite is improved while improving Ni-Mo composite deposite quality.
A kind of above-mentioned method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that in step 2
The power supply of the electro-deposition is DC power supply.The electric current self-regulation effect of DC voltage-stabilizing is preferable, is conducive to improve to closed-cell foam
The covering power of aluminium.
A kind of above-mentioned method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that in step 2
The voltage is 5.3V.Using the Ni-Mo composite deposite dense uniform being prepared under the preferred voltage value and to closed-cell foam
The covering of aluminium surface is complete.
Compared with the prior art, the present invention has the following advantages:
1, the present invention prepares Ni-Mo composite deposite in closed-cell foam aluminium surface by the method for pressure stabilizing electro-deposition, due to steady
Piezo deposition has the function of electric current self-regulation, so that the metal ion at closed-cell aluminum foam shrinkage pool has sufficiently large cathode pole
Change value is to carry out electro-deposition, and electro-deposition later period electric current tends towards stability, and improves the covering power to closed-cell aluminum foam, changes
It has been apt to the quality of Ni-Mo composite deposite, complete uniform, compact structure Ni-Mo composite deposite has been obtained, to improve closed pore
Density, corrosion resistance, yield strength, plateau stress, the unit volume of foamed aluminium absorb the performances such as the size of energy, expand
The application field of closed-cell aluminum foam.
2, the present invention using pressure stabilizing electrodeposition technology and selects technological parameter appropriate, improves the rate of electro-deposition, fastly
The Ni-Mo composite deposite of even compact fastly is formed in closed-cell foam aluminium surface, while improving Ni-Mo composite deposite and closed pore
The binding force of foam aluminium surface obtains the coating of suitable thickness, so that the corrosion-resistant and mechanical property of closed-cell aluminum foam is improved,
It is energy-efficient.
3, the citrate system electrolyte service life that the present invention uses is up to 4 months or more, and due to the lemon
It generates the metal ion seriously polluted in silicate system electrolyte to environment without containing high valence chrome etc., has long-acting, environmentally protective
The advantages of.
4, electro-deposition preparation process of the invention to porosity, size of closed-cell aluminum foam etc. without particular/special requirement, as long as can
Electrodeposition process can be carried out with the closed-cell aluminum foam of submergence in the electrolytic solution, to obtain uniformly on the surface of closed-cell aluminum foam
Fine and close Ni-Mo composite deposite, improves the scope of application of preparation method of the present invention.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the photo of the closed-cell aluminum foam of the embodiment of the present invention 1.
Fig. 2 is the photo that the surface of the embodiment of the present invention 1 is deposited with the closed-cell aluminum foam of Ni-Mo composite deposite.
Fig. 3 is the section SEM figure that the surface of the embodiment of the present invention 1 is deposited with the closed-cell aluminum foam of Ni-Mo composite deposite.
Fig. 4 is the SEM figure (50 ×) for the Ni-Mo composite deposite that the embodiment of the present invention 1 is prepared on the surface of closed-cell aluminum foam.
Fig. 5 is the SEM figure (500 ×) for the Ni-Mo composite deposite that the embodiment of the present invention 1 is deposited in closed-cell foam aluminium surface.
Fig. 6 is the SEM figure (5000 ×) for the Ni-Mo composite deposite that the embodiment of the present invention 1 is deposited in closed-cell foam aluminium surface.
Fig. 7 is the EDS energy spectrum diagram in Fig. 6 at Q.
Fig. 8 is the SEM figure for the Ni-Mo composite deposite that the embodiment of the present invention 5 is prepared in closed-cell foam aluminium surface.
Fig. 9 is the SEM figure for the Ni-Mo composite deposite that comparative example 2 of the present invention is prepared in closed-cell foam aluminium surface.
Figure 10 is the SEM figure for the Ni-Mo composite deposite that the embodiment of the present invention 6 is prepared in closed-cell foam aluminium surface.
Figure 11 is the SEM figure for the Ni-Mo composite deposite that the embodiment of the present invention 7 is prepared in closed-cell foam aluminium surface.
Figure 12 is the SEM figure for the Ni-Mo composite deposite that comparative example 3 of the present invention is prepared in closed-cell foam aluminium surface.
Specific embodiment
Embodiment 1
The present embodiment the following steps are included:
Step 1: being add to deionized water nickel sulfate, sodium molybdate, sodium citrate and ammonium chloride to obtain electrolyte；Institute
The concentration for stating nickel sulfate in electrolyte is 0.35mol/L, and the concentration of sodium molybdate is 0.027mol/L, and the concentration of sodium citrate is
0.53mol/L, the concentration of ammonium chloride are 0.72mol/L；
Step 2: electrolyte obtained in step 1 is injected into the electrolytic cell of electrodeposition apparatus, by closed-cell aluminum foam
It is connected to the power cathode of electrodeposition apparatus and submerges in the electrolytic solution, nickel plate is connected to the power anode of electrodeposition apparatus simultaneously
Submergence in the electrolytic solution, then carries out electro-deposition, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam；It is described to close
The distance between hole foamed aluminium and nickel plate are 5cm；The temperature that electrolyte is controlled during the electro-deposition is 30 DEG C, the electricity
The voltage of deposition is 5.3V, time 10min；The power supply of the electro-deposition is DC power supply
Fig. 1 is the photo of the closed-cell aluminum foam of the present embodiment, and Fig. 2 is that the surface of the present embodiment is prepared with Ni-Mo Composite Coatings
The photo of the closed-cell aluminum foam of layer, by Fig. 1 and Fig. 2 comparison as can be seen that the surface of closed-cell aluminum foam is deposited with the Ni- of black gray expandable
Mo composite deposite, illustrate that the present embodiment electro-deposition method can prepare Ni-Mo composite deposite on the surface of closed-cell aluminum foam.
The closed-cell aluminum foam that the obtained surface of the present invention is prepared with Ni-Mo composite deposite sample and use molybdenum powder edge sample into
Row electron-microscope scanning, Fig. 3 is the section SEM figure that the surface of the present embodiment is prepared with the closed-cell aluminum foam of Ni-Mo composite deposite, in figure
A be closed-cell aluminum foam, B is Ni-Mo composite deposite, and the molybdenum powder that is compacted after sample is is inlayed by the place C.
Fig. 4 is the SEM figure (50 ×) for the Ni-Mo composite deposite that the present embodiment is prepared on the surface of closed-cell aluminum foam, from Fig. 4
It can be seen that, electro-deposition method of the invention makes also to deposited Ni-Mo composite deposite at closed-cell aluminum foam shrinkage pool, improves to closed pore
The covering power of foamed aluminium obtains complete uniform coating.
Fig. 5 is the SEM figure (500 ×) for the Ni-Mo composite deposite that the present embodiment is prepared in closed-cell foam aluminium surface, from Fig. 5
It can be seen that Ni-Mo composite deposite even compact manufactured in the present embodiment.
Fig. 6 is the SEM figure (5000 ×) for the Ni-Mo composite deposite that the present embodiment is prepared in closed-cell foam aluminium surface, from Fig. 6
As can be seen that Ni-Mo composite deposite manufactured in the present embodiment is distributed in nodule shape, densification is combined between coating particle, is not free
Gap.Fig. 7 is the EDS energy spectrum diagram in Fig. 6 at Q, from figure 7 it can be seen that the element in Ni-Mo composite deposite manufactured in the present embodiment
Including Ni, Mo, O, Al, illustrate that Ni-Mo composite deposite manufactured in the present embodiment is deposited on closed-cell foam aluminium surface, and Ni-Mo
Composite deposite will appear oxidative phenomena, and the aluminium element in energy spectrum diagram derives from closed-cell aluminum foam.
Comparative example 1
This comparative example difference from example 1 is that: current density be 4.5A/dm2Current stabilization under the conditions of carry out
Electro-deposition.
Embodiment 2
The present embodiment difference from example 1 is that: electrodeposition time described in step 2 be 20min.
Embodiment 3
The present embodiment difference from example 1 is that: electrodeposition time described in step 2 be 30min.
Embodiment 4
The present embodiment difference from example 1 is that: electrodeposition time described in step 2 be 40min.
Embodiment 5
The present embodiment difference from example 1 is that: the time of electro-deposition described in step 2 be 50min.
Fig. 8 is the SEM figure for the Ni-Mo composite deposite that the present embodiment is prepared in closed-cell foam aluminium surface, as can be seen from Figure 8,
Longer electrodeposition time makes the Ni-Mo composite deposite being prepared slight packing phenomenon occur.
Comparative example 2
This comparative example difference from example 1 is that: the time of electrodeposition process described in step 2 be 60min.
Fig. 9 is the SEM figure for the Ni-Mo composite deposite that this comparative example is prepared in closed-cell foam aluminium surface, can from Fig. 9
Out, it is blocked up to will lead to Ni-Mo composite deposite for the overlong time of electro-deposition, causes so that Ni-Mo composite deposite internal stress is excessive
Ni-Mo composite deposite is cracked.
Embodiment 6
The present embodiment difference from example 1 is that: the voltage of electro-deposition described in step 2 be 3.0V.
Figure 10 is the SEM figure for the Ni-Mo composite deposite that the present embodiment is prepared in closed-cell foam aluminium surface, can from Figure 10
Out, the electro-deposition voltage of the present embodiment is smaller, and the velocity of discharge of ion is slower, therefore the number of nuclei of unit time ion is got over
It is few, Figure 10 and Fig. 5 are compared to the coating as can be seen that in the Ni-Mo composite deposite being prepared under the present embodiment voltage
Grain is to the area coverage of matrix than the reduction of embodiment 1, and the compactness extent of Ni-Mo composite deposite is also than the reduction of embodiment 1.
Embodiment 7
The present embodiment difference from example 1 is that: the voltage of electro-deposition described in step 2 be 4.6V.
Figure 11 is the SEM figure for the Ni-Mo composite deposite that the present embodiment is prepared in closed-cell foam aluminium surface, from Figure 11 and Fig. 5
Compare as can be seen that the Ni-Mo composite deposite particle that prepare in closed-cell foam aluminium surface of the present embodiment is not fine and close enough, fails complete
Cover matrix.
Comparative example 3
This comparative example difference from example 1 is that: the voltage of electro-deposition described in step 2 be 7.2V.
Figure 12 is the SEM figure for the Ni-Mo composite deposite that this comparative example is prepared in closed-cell foam aluminium surface, can from Figure 12
Out, when voltage is 7.2V, cause electrodepositing speed too fast since voltage is excessive, it is internal in the Ni-Mo composite deposite of preparation to answer
Power is excessive and cracks.
Embodiment 8
The method of the present embodiment the following steps are included:
Step 1: nickel sulfate, sodium molybdate, sodium citrate, ammonium chloride are added in deionized water, stirred evenly after mixing,
Electrolyte is obtained, the concentration of nickel sulfate is 0.35mol/L in the electrolyte, and the concentration of sodium molybdate is 0.027mol/L, lemon
The concentration of sour sodium is 0.53mol/L, and the concentration of ammonium chloride is 0.72mol/L；
Step 2: the note of electrolyte obtained in step 1 is connected closed-cell aluminum foam sample to be processed in electrolytic cell
It is submerged in the electrolytic solution after being connected to the cathode of electro-deposition power supply, is immersed in electrolysis after nickel plate to be connected to the anode of electro-deposition power supply
In liquid, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam；The distance between the closed-cell aluminum foam and nickel plate are
5cm；The temperature that electrolyte is controlled during the electro-deposition is 30 DEG C, and the voltage of the electro-deposition is 3.0V, and the time is
50min。
Embodiment 9
The method of the present embodiment the following steps are included:
Step 1: nickel sulfate, sodium molybdate, sodium citrate, ammonium chloride are added in deionized water, stirred evenly after mixing,
Obtain electrolyte, obtain electrolyte, in the electrolyte concentration of nickel sulfate be 0.35mol/L, the concentration of sodium molybdate is
0.027mol/L, the concentration of sodium citrate are 0.53mol/L, and the concentration of ammonium chloride is 0.72mol/L,；
Step 2: the note of electrolyte obtained in step 1 is connected closed-cell aluminum foam sample to be processed in electrolytic cell
It is submerged in the electrolytic solution after being connected to the cathode of electro-deposition power supply, is immersed in electrolysis after nickel plate to be connected to the anode of electro-deposition power supply
In liquid, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam；The distance between the closed-cell aluminum foam and nickel plate are
5cm；The temperature that electrolyte is controlled during the electro-deposition is 30 DEG C, and the voltage of the electro-deposition is 4.6V, and the time is
30min。
Embodiment 10
The present embodiment difference from example 1 is that: in electrolyte concentration of nickel sulfate be 0.23mol/L, sodium molybdate
Concentration be 0.012mol/L, the concentration of sodium citrate is 0.45mol/L, and the concentration of ammonium chloride is 0.68mol/L.
Embodiment 11
The present embodiment difference from example 1 is that: in electrolyte concentration of nickel sulfate be 0.38mol/L, sodium molybdate
Concentration be 0.034mol/L, the concentration of sodium citrate is 0.65mol/L, and the concentration of ammonium chloride is 0.80mol/L.
The surface deposition that closed-cell aluminum foam, 1~embodiment of the embodiment of the present invention 9 and 1~comparative example of comparative example 3 are obtained
The closed-cell aluminum foam and closed-cell aluminum foam of Ni-Mo composite deposite carry out quasistatic compression test on electronic universal tester, quasi-
The parameter of static compression test are as follows: pressure 10kN, compression speed 5mm/min, compression ratio reach 70% or more, and the surrender measured is strong
The mechanical properties datas such as degree, plateau stress, unit volume absorption energy are as shown in table 1 below.
Surface prepared by 1 closed-cell aluminum foam of table, 1~embodiment of embodiment 9 and 1~comparative example of comparative example 3 is deposited with Ni-
The mechanical properties data of the closed-cell aluminum foam of Mo composite deposite
As known from Table 1, it is steeped using the closed pore that the surface that pressure stabilizing electro-deposition method is prepared is deposited with Ni-Mo composite deposite
The mechanical performances such as yield strength, plateau stress and the unit volume energy absorption of foam aluminium are improved, and illustrate pressure stabilizing of the invention
Electro-deposition method improves the covering power to closed-cell aluminum foam, improves the quality of Ni-Mo composite deposite, has obtained complete equal
Even, compact structure Ni-Mo composite deposite, to improve the mechanical performance of closed-cell aluminum foam.
The surface that from table 1 prepared by 1~embodiment of embodiment 5 and comparative example 2 is deposited with the closed pore bubble of Ni-Mo composite deposite
The mechanical properties data of foam aluminium can be seen that the growth with electrodeposition time, and surface is deposited with the closed-cell foam of composite deposite
The trend increased is presented in yield strength, plateau stress and the unit volume energy absorption of aluminium, illustrates the growth with electrodeposition time,
The amount for being deposited on Ni-Mo composite deposite on closed-cell aluminum foam increases, and surface is deposited with the closed-cell aluminum foam of Ni-Mo composite deposite
Yield strength, plateau stress and unit volume absorb energy and improve, when electrodeposition time is too long, as electricity is heavy in comparative example 2
When the long-pending time is 60min, surface is deposited with yield strength, plateau stress and the list of the closed-cell aluminum foam of Ni-Mo composite deposite
Position volume-absorption energy declines instead, and illustrating that electrodeposition time is too long causes Ni-Mo composite deposite blocked up, so that Ni-Mo is compound
Coating internal stress is excessive to cause Ni-Mo composite deposite cracked, so that reducing surface is deposited with Ni-Mo composite deposite
Yield strength, plateau stress and the unit volume of closed-cell aluminum foam absorb energy, and the time of electro-deposition is 10min~50min
It can obtain uniform, fine and close and cover the strong Ni-Mo composite deposite of binding force.
The surface that from table 1 prepared by embodiment 1,6~embodiment of embodiment 7 and comparative example 3 is deposited with Ni-Mo composite deposite
The mechanical properties data of closed-cell aluminum foam can be seen that in the range of 3.0V~5.3V, with the growth of electro-deposition voltage,
Becoming for increase is presented in yield strength, plateau stress and the unit volume energy absorption that surface is deposited with the closed-cell aluminum foam of composite deposite
Gesture, when voltage is more than 5.3V, when such as the voltage of comparative example 3 being 7.2V, the surrender of the Ni-Mo composite deposite on closed-cell aluminum foam
There is reduced trend in intensity, plateau stress and unit volume energy absorption, when the voltage of electro-deposition is 5.3V, the surface of preparation
The mechanical performance for being deposited with the closed-cell aluminum foam of Ni-Mo composite deposite is best.
The surface that from table 1 prepared by closed-cell aluminum foam, embodiment 1 and comparative example 1 is deposited with the closed pore of Ni-Mo composite deposite
The mechanical properties data of foamed aluminium can be seen that surface prepared by embodiment 1 and comparative example 1 and be deposited with Ni-Mo composite deposite
Closed-cell aluminum foam of the yield strength, plateau stress and unit volume energy absorption of closed-cell aluminum foam than non-coating is improved
Improve, wherein the surface that embodiment 1 uses pressure stabilizing electro-deposition to prepare is deposited with bending for the closed-cell aluminum foam of Ni-Mo composite deposite
Take intensity, plateau stress and unit volume energy absorption be above comparative example 1 using current stabilization electro-deposition preparation surface be deposited with Ni-
Yield strength, plateau stress and the unit volume energy absorption of the closed-cell aluminum foam of Mo composite deposite illustrate the present invention using pressure stabilizing
Electrodeposition process, which prepares the surface Ni-Mo and is deposited with the closed-cell aluminum foam of composite deposite, is substantially better than current stabilization electrodeposition process.
The above is only preferable profile embodiment of the invention, not does any restrictions to the present invention, all
According to inventive technique any simple modification substantially to the above embodiments, change and equivalent structural changes, this is still fallen within
In the protection scope of inventive technique scheme.
Claims (6)
1. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite, which is characterized in that this method includes following step
It is rapid:
Step 1: being add to deionized water nickel sulfate, sodium molybdate, sodium citrate and ammonium chloride to obtain electrolyte；The electricity
The concentration for solving nickel sulfate in liquid is 0.23mol/L~0.38mol/L, and the concentration of sodium molybdate is 0.012mol/L~0.034mol/
L, the concentration of sodium citrate are 0.45mol/L~0.65mol/L, and the concentration of ammonium chloride is 0.68mol/L~0.80mol/L；
Step 2: electrolyte obtained in step 1 is injected into the electrolytic cell of electrodeposition apparatus, closed-cell aluminum foam is connected
To electrodeposition apparatus power cathode and submerge in the electrolytic solution, nickel plate is connected to power anode and the submergence of electrodeposition apparatus
In the electrolytic solution, electro-deposition is then carried out, Ni-Mo composite deposite is prepared on the surface of closed-cell aluminum foam；The electro-deposition
Voltage be 3.0V~5.3V, the time be 10min~50min.
2. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite according to claim 1, feature exist
In the concentration of nickel sulfate is 0.35mol/L in electrolyte described in step 1, and the concentration of sodium molybdate is 0.027mol/L, citric acid
The concentration of sodium is 0.53mol/L, and the concentration of ammonium chloride is 0.72mol/L.
3. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite according to claim 1, feature exist
In the distance between closed-cell aluminum foam and nickel plate described in step 2 are 5cm.
4. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite according to claim 1, feature exist
In the temperature for controlling electrolyte during electro-deposition described in step 2 is 30 DEG C.
5. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite according to claim 1, feature exist
In the power supply of electro-deposition described in step 2 is DC power supply.
6. a kind of method in closed-cell foam aluminium surface deposition Ni-Mo composite deposite according to claim 1, feature exist
In voltage described in step 2 is 5.3V.
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| CN108998818A (en) * | 2018-07-16 | 2018-12-14 | 长安大学 | A method of in closed-cell aluminum foam copper-depositing on surface coating |
| CN110331423A (en) * | 2019-07-12 | 2019-10-15 | 中国原子能科学研究院 | A kind of electric depositing solution formula preparing foam nickel-molybdenum alloy |
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