CN103774193A - Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil - Google Patents
Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil Download PDFInfo
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Abstract
The invention relates to a method for electrolytic-depositing dispersed zinc crystal nucleuses on the surface of a medium-high voltage electronic aluminum foil. The method comprises the following steps: after performing homogenizing annealing, forming a medium-high voltage high-purity aluminum foil, wherein a [100] structure occupancy of the medium-high voltage high-purity aluminum foil is more than 95 percent, elements of Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn and Pb electrode potentials of which are higher than that of aluminum are not enriched on the surface of the medium-high voltage high-purity aluminum foil; pretreating to remove an oxidation film on the surface, and simultaneously forming a new water-containing film; and then depositing dispersed zinc crystal nucleuses on the surface of the aluminum foil in an electrolyte by adopting quick electrochemical deposition. The medium-high voltage electronic aluminum foil deposited with the dispersed zinc crystal nucleuses on the surface is adopted, pit etching of the aluminum foil can be effectively guided by the zinc crystal nucleuses during electrolytic corrosion, the uniformity of the distribution of tunnel holes is improved, and the self-corrosion thinning of the aluminum foil is reduced, thus the specific capacitance and bending resistance performance of the aluminum foil can be remarkably improved.
Description
Technical field
The present invention relates to the manufacture field of aluminium electrolutic capacitor mesohigh anode aluminium foil and etched foil, a kind of specifically method of mesohigh aluminium foil surface galvanic deposit disperse zinc nucleus.
Background technology
Along with the development of electronic product, certainly will there is the feature of heavy body and miniaturization as the medium-high voltage aluminum electrolytic capacitor of basic device, to meet the development need of electronic product.The anode aluminium foil using in medium-high voltage aluminum electrolytic capacitor generally generates a large amount of Tunnel-holes to expand its surface-area by the method for galvanic corrosion at aluminium foil surface, thereby carries high specific capacitance.In order to guarantee that mesohigh electrode aluminium foil has needed winding performance, the aluminium foil after corrosion also must have certain tensile strength and buckling performance, need in the middle of corrosive aluminum foil, keep the certain thickness aluminum layer not being corroded for this reason.Therefore in order to make the aluminium foil maximizing performance after corrosion, mesohigh aluminium foil, in corrosion process, need to improve homogeneity that aluminium foil surface pit distributes, avoid and the generation in hole and reduce the corrosion certainly of aluminium foil surface while sending out hole as far as possible.
The technique of mesohigh aluminium foil corrosion mainly comprises: process in pre-treatment before corrosion, a hole, reaming processing.When aluminium foil is sent out hole, the form in hole and distribution mode are mainly determined by the condition of surface of aluminium foil, aluminium foil surface pre-treatment relates to the processing of various physics and chemistries, comprises thermal treatment, Roughness Surface on Control, oil removing cleaning, acid, alkaline purification, cathodic polarization processing, anodic oxidation treatment, surface oxidation, deposition inert metal etc.At present, the performance that improves mesohigh corrosive aluminum foil both at home and abroad mainly realizes by two kinds of approach.The first approach: the trace element such as Pb, Sn, In that adds ppm level in mesohigh aluminium foil, make trace element such as Pb, Sn, In etc. in aluminium foil in aluminium foil surface generation enrichment by annealing thermal treatment, in ionogen, the trace element such as these Pb, Sn, In and aluminium form a large amount of corrosion microbatterys.In anode etching process, these microbatterys that aluminium foil surface exists can improve aluminium foil corrosion and send out the homogeneity in hole, the homogeneity that consequently generates Tunnel-hole has improved, but the corrosion thinning of aluminium foil has also increased simultaneously, the former is improved the ratio electric capacity of aluminium foil, and the latter declines the mechanical property of corrosive aluminum foil.The second approach: further improve aluminium foil and send out the homogeneity in hole by pre-treatment, even realize the ordered arrangement of Tunnel-hole, make to be significantly improved than electric capacity, suppress the corrosion thinning of aluminium foil simultaneously.
A large amount of researchs show, at the aluminium foil surface sedimentation potential loose thin metal layer more positive than aluminium, as Pb, In, Sn, Zn, Fe, Cu etc., make it be attached to uniformly aluminium foil surface, the microbattery that these loose metallic films of deposition and aluminium foil form can improve aluminium foil sends out the homogeneity in hole.But can accelerate the corrosion certainly of aluminium foil surface simultaneously, cause the attenuate (W.Lin of aluminium foil, G.C.Tu, C.F.Lin and Y.M.Peng, The effects of lead impurity on the DC-etching behavior of aluminum for electrolytic capacitor usage, Corrosion Science, Vol.38, No.6, (1996), pp.889-907.) (W.Lin, G.C.Tu, C.F.Lin and Y.M.Peng, The effects of indium impurity on the DC-etching behavior of aluminum for electrolytic capacitor usage, Corrosion Science, Vol.39, No.9, (1997), pp.1531-1543.) in these microbatterys, metallics in the loose metallic film of deposition is negative electrode, aluminium foil is anode, increase thus aluminium foil surface the active site corroding has occurred, reduce the critical potential that pitting occurs, thereby improve Tunnel-hole and sent out the homogeneity in hole.But because the area density of the metallics in these loose metallic films is very high, form a large amount of corrosion microbatterys at aluminium foil surface, its area density is considerably beyond the area density that need to send out hole, thereby accelerate aluminium foil surface from corrosion, cause the remarkable attenuate of aluminium foil, be unfavorable for, than the increasing substantially of electric capacity, having reduced again the utilization ratio of aluminium foil and the mechanical property of etched foil.Therefore, in electric aluminum foil industry, do not obtain so far application in the technology of mesohigh aluminium foil surface deposition Pb, In, Sn, Zn, Fe, Cu equi-potential calibration thin metal layer.
Adopt the method for quick electrodeposition to deposit the tin nucleus of disperse at aluminium foil surface, guide the corrosion of aluminium foil to send out hole, obtained (the patent number of accepting: 201310302175.5) of good effect.Zinc, as the current potential element more positive than aluminium, also can form local microbattery with aluminum substrate and guide the corrosion of aluminium foil to send out hole, and the electropotential of zinc is than the negative (Zn of tin
2+:-0.763V, Sn
4+:+0.05V), can guide the corrosion of aluminium foil to send out hole, be not easy again to cause excessive erosion, the electricity ratio galvanic deposit tin that electrodepositing zinc needs is in addition low, is conducive to improve aluminium foil and sends out the quality in hole and reduce production costs.
Because aluminium is very active metal, its surface is very easy to generate the oxide film of protectiveness.In order to generate the Tunnel-hole perpendicular to aluminium foil surface growth, mesohigh electric aluminum foil must have that { 100} texture, { 100} texture, aluminium foil need to carry out long term annealing processing at 500-600 ℃ in order to obtain.But in this anneal process, it is more fine and close that the oxide film of aluminium foil surface becomes, become follow-up electrolytic corrosion and send out the obstacle in hole.Therefore, in the time that hole is sent out in traditional mesohigh aluminium foil electrolytic corrosion, must carry out pre-treatment this layer of fine and close oxide film removed, form the new film that contains a large amount of defects and be beneficial to the formation of Tunnel-hole.In the time of electrodepositing zinc nucleus, because the aluminium foil surface through 500-600 ℃ of long term annealing exists fine and close oxide film, therefore can not go out zinc nucleus at its surperficial Direct precipitation.One of gordian technique of the present invention is exactly to remove the fine and close oxide film of aluminium foil surface through pre-treatment, then forms new aqueous film.In the process of electrodepositing zinc, zine ion can pass through this layer of aqueous film, goes out zinc nucleus at aluminium surface deposition.
Summary of the invention
A kind of method that the object of the present invention is to provide mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus, aluminium foil can be removed the fine and close oxide film on its surface through pre-treatment, and forms the new moisture film that contains.In electrolytic solution, electrodepositing zinc nucleus is out-of-date, and zine ion can contain moisture film by this layer, thereby deposits the zinc nucleus of disperse at aluminium foil surface.
The present invention achieves the above object by the following technical solutions: a kind of method of mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus, comprising the steps: will be after homogenizing annealing be processed, form that { 100} texture occupation rate is greater than 95%, the surface not enrichment electropotential Mn higher than aluminium, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, Pb element, purity is 99.99% mesohigh high-purity aluminum foil, at high purity water, or alkaline solution, or in phosphoric acid solution, or in salpeter solution, carry out pre-treatment, or in sulfuric acid-sulphuric acid soln, carry out electrochemical polishing treatment, remove surperficial oxide film, form new aqueous film at aluminium foil surface, then in the electrolytic solution of deposition zinc nucleus, adopt quick electrodeposition technology, zine ion can aluminium foil surface aqueous film, deposit the zinc nucleus of disperse at aluminium foil surface.
Concrete operation step is: be the high purity water poach 5～50 seconds of 60～100 ℃ by be placed in temperature through homogenizing annealing mesohigh high-purity aluminum foil after treatment, or be to process 5～30 seconds in 15～70 ℃ of concentration alkaline solution that is 0.5～1.5mol/L in temperature, or process 30～60 seconds in the phosphoric acid solution that is 0.1～1mol/L 40～60 ℃ of concentration, or be to process 10～40 seconds in 30～70 ℃ of concentration salpeter solution that is 0.5～2mol/L in temperature, or be 40～70 ℃ in temperature and carry out electropolishing processing in containing 5～14mol/L phosphoric acid+5～10mol/L sulfuric acid+0.1～1mol/L glycerol mixing solutions, polishing current density is 30～120mA/cm
2, polishing time is 10～60 seconds, removes surperficial oxide film and forms the new moisture film that contains.Afterwards, the above-mentioned aluminium foil with aqueous film of handling well is placed in to the electrolytic solution that contains zine ion and carries out galvanic deposit, electrolytic solution becomes: 0.01～0.5mol/L zinc oxide+0.02～0.2mol/L sodium hydroxide; Temperature is 30～60 ℃; Take graphite as anode, forming the new mesohigh aluminium foil containing moisture film take surface is negative electrode; The charged electrolytic solution that enters of aluminium foil when galvanic deposit disperse tin nucleus, wherein the current density of galvanic deposit is 5～60mA/cm
2, electrodeposition time is 5～30 seconds.
The present invention is directed to the problem that the aluminium foil of the loose thin metal layer of surface deposition current potential calibration exists in anode etching, invented the novel method that goes out disperse zinc nucleus on mesohigh high-purity aluminum foil surface by electrochemical deposition.The problem that former method exists is mainly: send out the homogeneity in hole although this loose thin metal layer can improve aluminium foil, but can strongly accelerate the corrosion certainly of aluminium foil surface, cause the attenuate of aluminium foil, not only bad for the ratio electric capacity that increases substantially etched foil, and the utilization ratio of aluminium foil and the mechanical property of etched foil are reduced, in the present invention, the area density that need to send out hole by the area density of the disperse zinc nucleus that galvanic deposit obtains is greater than slightly solves the problems referred to above, and its principle and technical superiority are as follows:
1. between disperse zinc nucleus and aluminium foil, form microbattery, in anode electrolysis process, these microbatterys become the activity site of preferential generation Tunnel-hole, can control the density of sending out hole, improve the homogeneity of sending out hole, reduce the also generation in hole, thereby can significantly improve the ratio electric capacity of corrosive aluminum foil.
2. owing to forming the significantly decline of the thin metal layer that the quantity of microbattery is more loose than deposition between disperse zinc nucleus and aluminium foil, cause except sending out hole site, other surperficial microbattery of aluminium foil is little, therefore except sending out hole site, declining from corrosion thinning amount of other surface of aluminium foil, can significantly improve utilization ratio and the mechanical property of corrosive aluminum foil.
3. when the aluminium foil of employing deposition disperse zinc nucleus of the present invention carries out anode etching, because aluminium foil overwhelming majority surface is rafifinal, thereby insensitive to the impurity of etchant solution, can allow to contain in etchant solution higher foreign matter content, can not cause significant aluminium foil from corrosion thinning, reduce the difficulty of aluminium foil corrosion solution Industry Control, can improve the quality of foil industry corrosion products.
4. the method for deposition disperse zinc nucleus of the present invention can be used as the last treatment technology of manufacturing mesohigh electronics aluminium foil, manufactures novel mesohigh electronics aluminium foil; Also can be used as the pretreatment technology of manufacturing mesohigh electronics aluminium etched foil, manufacture high-quality mesohigh electronics aluminium etched foil.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope pattern that adopts the aluminium foil surface galvanic deposit disperse zinc nucleus that the method for the mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus described in the present invention prepares.
Embodiment
By the following examples technical scheme of the present invention is further described.
The aluminium foil that adopts surface deposition in the present invention to go out the zinc nucleus of disperse is sent out pitting corrosion, sending out hole solution is the aluminum ions mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, carry out again reaming corrosion, the salpeter solution that reaming solution is 0.07mol/L, temperature is 70 ℃, aftertreatment is salpeter solution, clean, dry, finally carry out 520V according to industry standard and change into.
Comparative example
Purity is 99.99%, thickness is 120 μ m, cubic texture occupation rate is greater than the high-purity aluminum foil of 95% surface enrichment micro lead element, adopt traditional mixing acid pretreatment technology, pretreatment fluid used is 1mol/L hydrochloric acid+3mol/L sulfuric acid, temperature is 80 ℃, aluminium foil is directly soaked 120 seconds in pretreatment fluid, then carry out above-mentioned pitting corrosion, the aftertreatment of reaming burn into and the 520V of sending out and change into processing.
Embodiment 1
Be 99.99% by purity, thickness is 110 μ m, cubic texture occupation rate be greater than 95% be placed in 95 ℃ of boiling water poach 30 seconds through not enrichment of homogenizing annealing rear surface Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, mesohigh high-purity aluminum foil that these electropotentials of Pb are higher than aluminium, form new for after moisture film at aluminium foil surface.Above-mentioned aluminium foil is placed in to electrolytic solution and carries out the processing of electrodepositing zinc nucleus, the composition of electrolytic solution is: 0.3mol/L zinc oxide+0.1mol/L sodium hydroxide; Take graphite as anode, form the new mesohigh aluminium foil containing moisture film as negative electrode take the above-mentioned surface through poach, enter in electrolytic solution charged aluminium foil, wherein the temperature of electrolytic solution is 40 ℃, the current density of galvanic deposit is 25mA/cm
2, electrodeposition time is 15 seconds.
The above-mentioned aluminium foil that obtains disperse zinc nucleus by galvanic deposit on surface is sent out to pitting corrosion, sending out hole solution is the mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, then carries out the reaming corrosion identical with comparative example, and aftertreatment and 520V change into processing.
Embodiment 2
Be 99.99% by purity, thickness is 110 μ m, cubic texture occupation rate be greater than 95% to be placed in temperature through not enrichment of homogenizing annealing rear surface Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, mesohigh high-purity aluminum foil that these electropotentials of Pb are higher than aluminium be that the alkaline solution that 60 ℃ of concentration are 1mol/L is processed 15 seconds, form new for after moisture film at aluminium foil surface.Above-mentioned aluminium foil is placed in to electrolytic solution and carries out the processing of electrodepositing zinc nucleus, the composition of electrolytic solution is: 0.3mol/L zinc oxide+0.1mol/L sodium hydroxide; Take graphite as anode, form the new mesohigh aluminium foil containing moisture film as negative electrode take the above-mentioned surface through poach, enter in electrolytic solution charged aluminium foil, wherein the temperature of electrolytic solution is 40 ℃, the current density of galvanic deposit is 25mA/cm
2, electrodeposition time is 15 seconds.
The above-mentioned aluminium foil that obtains disperse zinc nucleus by galvanic deposit on surface is sent out to pitting corrosion, sending out hole solution is the mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, then carries out the reaming corrosion identical with comparative example, and aftertreatment and 520V change into processing.
Embodiment 3
Be 99.99% by purity, thickness is 110 μ m, cubic texture occupation rate is greater than 95% be placed in through not enrichment of homogenizing annealing rear surface Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, mesohigh high-purity aluminum foil that these electropotentials of Pb are higher than aluminium the phosphoric acid solution that 60 ℃ of concentration are 0.5mol/L and process 30～60 seconds, forms new for moisture film at aluminium foil surface.Above-mentioned aluminium foil is placed in to electrolytic solution and carries out the processing of electrodepositing zinc nucleus, the composition of electrolytic solution is: 0.3mol/L zinc oxide+0.1mol/L sodium hydroxide; Take graphite as anode, form the new mesohigh aluminium foil containing moisture film as negative electrode take the above-mentioned surface through poach, enter in electrolytic solution charged aluminium foil, wherein the temperature of electrolytic solution is 40 ℃, the current density of galvanic deposit is 25mA/cm
2, electrodeposition time is 15 seconds.
The above-mentioned aluminium foil that obtains disperse zinc nucleus by galvanic deposit on surface is sent out to pitting corrosion, sending out hole solution is the mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, then carries out the reaming corrosion identical with comparative example, and aftertreatment and 520V change into processing.
Embodiment 4
Be 99.99% by purity, thickness is 110 μ m, cubic texture occupation rate is greater than 95% be placed in through not enrichment of homogenizing annealing rear surface Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, mesohigh high-purity aluminum foil that these electropotentials of Pb are higher than aluminium salpeter solution that 60 ℃ of concentration are 1mol/L and process and remove surperficial oxide film for 30 seconds, forms new for moisture film at aluminium foil surface.Above-mentioned aluminium foil is placed in to electrolytic solution and carries out the processing of electrodepositing zinc nucleus, the composition of electrolytic solution is: 0.3mol/L zinc oxide+0.1mol/L sodium hydroxide; Take graphite as anode, form the new mesohigh aluminium foil containing moisture film as negative electrode take the above-mentioned surface through poach, enter in electrolytic solution charged aluminium foil, wherein the temperature of electrolytic solution is 40 ℃, the current density of galvanic deposit is 25mA/cm
2, electrodeposition time is 15 seconds.
The above-mentioned aluminium foil that obtains disperse zinc nucleus by galvanic deposit on surface is sent out to pitting corrosion, sending out hole solution is the mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, then carries out the reaming corrosion identical with comparative example, and aftertreatment and 520V change into processing.
Embodiment 5
Be 99.99% by purity, thickness is 110 μ m, cubic texture occupation rate is greater than 95% be placed in polishing fluid through not enrichment of homogenizing annealing rear surface Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, mesohigh high-purity aluminum foil that these electropotentials of Pb are higher than aluminium and carry out electrochemical polishing treatment, and the composition of polishing fluid is: 12mol/L phosphoric acid+7.6mol/L sulfuric acid+0.2mol/L glycerol mixing solutions; While carrying out polishing, polishing current density is 60mA/cm
2, polishing time is 30 seconds, forms the new moisture film that contains at aluminium foil surface.Above-mentioned aluminium foil is placed in to electrolytic solution and carries out the processing of electrodepositing zinc nucleus, the composition of electrolytic solution is: 0.3mol/L zinc oxide+0.1mol/L sodium hydroxide; Take graphite as anode, form the new mesohigh aluminium foil containing moisture film as negative electrode take the above-mentioned surface through poach, enter in electrolytic solution charged aluminium foil, wherein the temperature of electrolytic solution is 40 ℃, the current density of galvanic deposit is 25mA/cm
2, electrodeposition time is 15 seconds.
The above-mentioned aluminium foil that obtains disperse zinc nucleus by galvanic deposit on surface is sent out to pitting corrosion, sending out hole solution is the mixing solutions of 0.8mol/L hydrochloric acid+3.6mol/L sulfuric acid+0.8mol/L, temperature is 75 ℃, then carries out the reaming corrosion identical with comparative example, and aftertreatment and 520V change into processing.
Table 1 is in comparative example and embodiment, to adopt aluminium foil that surface deposition of the present invention goes out disperse zinc nucleus at anode etching with after changing into, the corrosion thinning amount of aluminium foil, than electric capacity and bending times, can see the aluminium foil that adopts surface deposition of the present invention to go out the zinc nucleus of disperse, corrosion thinning reduces 1-3mm, improve and be greater than 5% than electric capacity, bending times improves 15% left and right.The aluminium foil corrosion attenuate amount of table 1 comparative example and embodiment, than electric capacity and bending times
| Sample | Corrosion thinning amount | Than electric capacity (μ F/cm 2) | Bending times |
| Comparative example | 5μm | 0.736 | 17 |
| Embodiment 1 | 3μm | 0.778 | 21 |
| Embodiment 2 | 4μm | 0.760 | 20 |
| Embodiment 3 | 4μm | 0.770 | 20 |
| Embodiment 4 | 2μm | 0.795 | 21 |
| Embodiment 5 | 3μm | 0.783 | 20 |
Claims (4)
1. the method for a mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus, it is characterized in that, comprising the steps: will be after homogenizing annealing be processed, form that { 100} texture occupation rate is greater than 95%, the surface not enrichment electropotential Mn higher than aluminium, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, Pb element, purity is 99.99% mesohigh high-purity aluminum foil, at high purity water, or alkaline solution, or phosphoric acid solution, or in salpeter solution, carry out pre-treatment, or in phosphoric acid-sulfuric acid mixed solution, carry out electrochemical etching pre-treatment, to remove surperficial oxide film, form the new moisture film that contains at aluminium foil surface simultaneously, then in the electrolytic solution of deposition zinc nucleus, adopt fast electrochemical deposition zinc nucleus technology, deposit the zinc nucleus of disperse at aluminium foil surface.
2. the method for mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus according to claim 1, it is characterized in that: describedly in high purity water or alkaline solution or phosphoric acid solution or salpeter solution, carrying out pre-treatment, is that mesohigh high-purity aluminum foil after treatment process homogenizing annealing is processed 5～50 seconds in 60～100 ℃ of high purity waters; Or at 15～70 ℃, in the alkaline solution that concentration is 0.5～1.5mol/L, process 5～30 seconds; Or at 40～60 ℃, in the phosphoric acid solution that concentration is 0.1～1mol/L, process 30～60 seconds, or at 30～70 ℃, in the salpeter solution that concentration is 0.5～2mol/L, process 10～40 seconds; Remove the oxide film of aluminium foil surface, washing, forms the new moisture film that contains at aluminium foil surface.
3. the method for mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus according to claim 1, it is characterized in that: describedly in phosphoric acid-sulfuric acid mixed solution, carry out electrochemical etching pre-treatment, will be through homogenizing annealing mesohigh high-purity aluminum foil after treatment, it is 40～70 ℃ in temperature, contain in 5～14mol/L phosphoric acid+5～10mol/L sulfuric acid+0.1～1mol/L glycerol mixing solutions and carry out electropolishing processing, wherein, polishing current density be 30～120mA/cm
2, polishing time is 10～60 seconds, washing forms the new moisture film that contains at aluminium foil surface.
4. according to the method for the mesohigh electric aluminum foil surface electrical deposition disperse zinc nucleus described in claim 1,2,3, it is characterized in that: the described fast electrochemical deposition zinc nucleus technology that adopts in the electrolytic solution of deposition zinc nucleus, deposit the zinc nucleus of disperse at aluminium foil surface, consisting of of its galvanic deposit disperse zinc nucleus electrolytic solution: 0.01～0.5mol/L zinc oxide+0.02～0.2mol/L sodium hydroxide, temperature is 30～60 ℃; When deposition zinc nucleus, take graphite cake as anode, it is negative electrode that surface forms the new mesohigh aluminium foil containing moisture film, the charged electrolytic solution that enters of aluminium foil, and the current density of galvanic deposit is 5～60mA/cm
2, electrodeposition time is 5～30 seconds.
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| CN104357886A (en) * | 2014-10-30 | 2015-02-18 | 广西贺州桂海铝业科技有限公司 | Method for chemically depositing diffused tin-zinc crystal nucleus on surface of high-purity aluminum foil for medium/high-voltage positive electrode |
| CN104357886B (en) * | 2014-10-30 | 2017-10-17 | 广西贺州桂海铝业科技有限公司 | The method that mesohigh anode deposits disperse tin, zinc nucleus with high-purity aluminum foil surface chemistry |
| CN104616898A (en) * | 2014-12-31 | 2015-05-13 | 东莞市长安东阳光铝业研发有限公司 | Method for improving hole production performance of aluminum foil through additional annealing treatment |
| CN104616898B (en) * | 2014-12-31 | 2017-07-07 | 东莞市长安东阳光铝业研发有限公司 | A kind of method that additional annealing treatment improves aluminium foil hair engaging aperture performance |
| CN104733181A (en) * | 2015-02-16 | 2015-06-24 | 广西贺州桂海铝业科技有限公司 | Method and device for depositing disperse tin and zinc crystal nucleuses on surface of highly pure aluminum foil for medium and high voltage anodes in mist spraying mode |
| CN104733181B (en) * | 2015-02-16 | 2017-06-06 | 广西正润新材料科技有限公司 | Mesohigh anode deposits the method and device of disperse tin, zinc nucleus with high-purity aluminum foil surface spray |
| CN113235023A (en) * | 2021-05-10 | 2021-08-10 | 广西正润新材料科技有限公司 | Low-voltage electronic aluminum foil for capacitor and preparation process thereof |
| CN113235024A (en) * | 2021-05-10 | 2021-08-10 | 广西正润新材料科技有限公司 | Annealing method in production of medium-high voltage electronic aluminum foil for high-capacity high-strength capacitor |
| CN113235023B (en) * | 2021-05-10 | 2022-05-31 | 广西正润新材料科技有限公司 | Low-voltage electronic aluminum foil for capacitor and preparation process thereof |
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