CN115161646A - Method for removing oxide on surface of electrolytic nickel - Google Patents
Method for removing oxide on surface of electrolytic nickel Download PDFInfo
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- CN115161646A CN115161646A CN202210803657.6A CN202210803657A CN115161646A CN 115161646 A CN115161646 A CN 115161646A CN 202210803657 A CN202210803657 A CN 202210803657A CN 115161646 A CN115161646 A CN 115161646A
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- electrolytic nickel
- oxide
- pickling
- acid
- nickel
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000005554 pickling Methods 0.000 claims abstract description 30
- 238000005406 washing Methods 0.000 claims abstract description 30
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000002791 soaking Methods 0.000 claims description 11
- 238000000643 oven drying Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 238000003466 welding Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 229910000480 nickel oxide Inorganic materials 0.000 description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 6
- 230000035484 reaction time Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- -1 nickel sesquioxide Chemical compound 0.000 description 2
- GNMQOUGYKPVJRR-UHFFFAOYSA-N nickel(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ni+3].[Ni+3] GNMQOUGYKPVJRR-UHFFFAOYSA-N 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005477 sputtering target Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a method for removing electrolytic nickel surface oxide, which comprises the following steps: carrying out acid washing, water washing and drying on electrolytic nickel to be treated in sequence to obtain electrolytic nickel with surface oxides removed; the pickling agent used in the pickling includes nitric acid and/or hydrochloric acid. The method for removing the oxide on the surface of the electrolytic nickel can completely remove the oxide on the surface of the electrolytic nickel by adopting the acid liquid with lower concentration, and the safety coefficient is higher; concentrated nitric acid and/or hydrofluoric acid are not used and are relatively more environmentally friendly.
Description
Technical Field
The invention belongs to the technical field of removing oxide skin on the surface of a metal material, and relates to a method for removing an oxide on the surface of electrolytic nickel.
Background
Electrolytic nickel is nickel produced using an electrolytic process. Roasting the enriched sulfide ore into oxide, reducing the oxide into crude nickel by using carbon, and electrolyzing to obtain pure metallic nickel. Nickel is used as a catalyst for hydrogenation reactions in the chemical industry. The nickel electroplating refers to the process of depositing a coating by the directional migration of ions under the action of an electric field. Has good conductivity and is black and gray in color. Besides the main components of main salt, various electroplating additives and various assistants are added to the plating solution, which is mainly used for brightening the plating layer, leveling, refining crystals, preventing pinholes and promoting cathode polarization. The electrolytic nickel is mainly used in atomic energy industry, alkaline storage battery, electrical alloy, high temperature high strength alloy, catalyst and powder metallurgy additive metallurgy, diamond tool, non-ferrous alloy, hydrogenation agent which can also be used for chemical reaction, etc.
The metal nickel belongs to high-temperature molten metal, light substances are released to a greater extent, and the light substances are pumped out of the furnace body under the condition of vacuum pumping, so that the aim of purification is fulfilled. However, most metal oxides have a melting point much higher than that of the simple metal, and when the metal is melted, the oxide is not melted to a large extent and exists as large impurities inside and outside the metal ingot. The surface of the electrolytic nickel has a layer of gray black material which is high-valence nickel oxide, namely nickel sesquioxide, and has a chemical formula (Ni) 2 O 3 ) For the semiconductor high-purity sputtering target industry, raw material purity needs to be controlled from the source, so oxides on electrolytic nickel must be removed before smelting.
CN 110092423A discloses a method for producing a nickel sulfate solution by quickly dissolving nickel oxide and deacidifying and removing impurities from nickel soap, wherein sulfuric acid is added into nickel oxide for dissolution reaction, and the ratio of the volume (mL) of the sulfuric acid to the mass (g) of the nickel oxide is 1: (1-2), the concentration of hydrogen ions in sulfuric acid is 12-16 mol/L, the reaction temperature is 90-95 ℃, and the reaction time is 15-30 min; the method uses a sulfuric acid heating method to remove nickel oxide, and the operation is complex. The heated sulfuric acid may splash, which may pose a safety threat to the personal safety of the operator.
CN 102888613A discloses a pickling solution for removing oxide skin on the surface of nickel and nickel alloy and a pickling method, wherein the pickling solution is prepared by uniformly mixing the following raw materials in percentage by volume: 13-45% of hydrofluoric acid, 11-30% of nitric acid and the balance of water; the mass percentage concentration of the hydrofluoric acid is 55%; the mass percentage concentration of the nitric acid is 65-68%. The method comprises the following steps: soaking the brocade or the brocade alloy with the oxide scale on the surface in pickling solution for 5min to 30min at the temperature of 35 ℃ to 45 ℃, taking out the brocade or the brocade alloy, washing the brocade or the brocade alloy with high pressure water to remove the oxide scale on the surface, and drying the surface of the brocade or the brocade alloy with the oxide scale removed. The pickling solution used in the method contains hydrofluoric acid, and can threaten the personal safety of operators in the using process.
CN 111112787A discloses a method for removing nickel-plating oxide on a shell, which comprises the following steps: step S1: putting the nickel-plated shell to be reduced into a vacuum welding furnace, and vacuumizing the vacuum welding furnace to 5mba; step S2: filling pure hydrogen into the vacuum welding furnace to normal pressure, and vacuumizing the vacuum welding furnace to 5mba; and step S3: ammonia gas passes through formic acid liquid and is filled into a vacuum welding furnace to normal pressure; and step S4: heating the vacuum welding furnace to more than 200 ℃, and simultaneously filling hydrogen gas passing through formic acid liquid into the vacuum welding furnace; step S5: preserving the heat of the vacuum welding furnace, and simultaneously filling hydrogen gas passing through formic acid liquid into the vacuum welding furnace; step S6: and cooling the vacuum welding furnace to 45 ℃. The method provided by the patent is complex to operate, high in cost and not suitable for popularization and application in the field of target preparation processes.
In the industry of high-purity sputtering target materials of semiconductors, aiming at the gray black high-valence nickel oxide on the surface of electrolytic nickel, the purity of raw materials needs to be controlled from the source, so that the provision of a simple, safe and green cleaning method is one of the problems to be solved in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for removing the oxide on the surface of electrolytic nickel. The method can completely remove the oxide on the surface of the electrolytic nickel by adopting the acid solution with lower concentration, and has higher safety factor; concentrated nitric acid and/or hydrofluoric acid are not used and are relatively more environmentally friendly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
carrying out acid washing, water washing and drying on electrolytic nickel to be treated in sequence to obtain electrolytic nickel with surface oxides removed;
the pickling agent used in the pickling includes nitric acid and/or hydrochloric acid.
The method can completely remove the oxide on the surface of the electrolytic nickel by adopting nitric acid and/or hydrochloric acid, and has higher safety coefficient.
Preferably, the pickling comprises immersing the electrolytic nickel to be treated in a pickling agent.
Preferably, the acid pickling agent used in the acid pickling has a mass concentration of 20 to 30wt%, and may be, for example, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, or 30wt%, but is not limited to the recited values, and other values not recited in the range of values are also applicable.
The concentration of the acid washing agent provided by the invention is too high or too low to effectively clean the oxide on the surface of the electrolytic nickel.
Preferably, the acid washing temperature is 20-30 ℃, for example, can be 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃ or 30 ℃, but not limited to the enumerated values, other numerical values in the range are also applicable.
The pickling temperature is room temperature, so that the phenomenon that pickling solution splashes due to overhigh temperature of the acid solution is avoided, and the personal safety of operators is not threatened.
Preferably, the acid washing time is 22-26h, for example 22h, 22.5h, 23h, 23.5h, 24h, 24.5h, 25h, 25.5h or 26h, but is not limited to the recited values, and other values not recited in the range of values are also applicable.
According to the invention, the metal nickel cleaned after too long pickling time reacts with the pickling solution, so that the loss of nickel is increased; if the time is too short, the oxide on the surface of the electrolytic nickel is not removed completely.
Preferably, the water wash comprises flushing the electrolytic nickel to be treated with flowing water.
Preferably, the flow rate of water in the water wash is 0.7 to 1.2m/s, and may be, for example, 0.7m/s, 0.8m/s, 0.9m/s, 1.0m/s, 1.1m/s or 1.2m/s, but is not limited to the values recited, and other values not recited within the range of values are equally applicable.
Preferably, the washing time is 20-40min, such as 20min, 22min, 24min, 26min, 28min, 30min, 32min, 34min, 36min, 38min or 40min, but not limited to the values listed, and other values not listed within the range of values are equally applicable.
Preferably, the drying comprises oven drying or air gun drying.
As a preferred technical scheme, the method for removing the oxide on the surface of the electrolytic nickel comprises the following steps:
soaking the electrolytic nickel to be treated in a pickling agent with the mass concentration of 20-30wt% at the temperature of 20-30 ℃ for pickling for 22-26h, then washing with water with the flow rate of 0.7-1.2m/s for 20-40min, and drying to obtain the electrolytic nickel without surface oxides.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the beneficial effects that:
(1) The method for removing the oxide on the surface of the electrolytic nickel can completely remove the oxide on the surface of the electrolytic nickel by adopting the acid liquid with lower concentration, and the safety coefficient is higher; concentrated nitric acid and/or hydrofluoric acid are not used, and the method is relatively more environment-friendly;
(2) The method for removing the oxide on the surface of the electrolytic nickel does not need to carry out mechanical treatment on the surface of the electrolytic nickel, and avoids the damage of the surface of the electrolytic nickel.
Detailed Description
The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in 25wt% nitric acid at 22 ℃ for acid washing for 24h, then washing with water at the flow rate of 0.9m/s for 30min, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
The method provided by the embodiment can effectively remove the oxide on the surface of the electrolytic nickel, and the electrolytic nickel after the oxide is removed has smooth surface and good brightness.
Example 2
The embodiment provides a method for removing an oxide on the surface of electrolytic nickel, which comprises the following steps:
and soaking the electrolytic nickel to be treated in 20wt% nitric acid at 20 ℃ for acid washing for 26h, then flushing with water at the flow rate of 0.7m/s for 40min, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
By adopting the method provided by the embodiment, the oxide on the surface of the electrolytic nickel can be effectively removed, and the electrolytic nickel after the oxide is removed has a smooth surface and good brightness.
Example 3
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in nitric acid with the mass concentration of 30wt% at 30 ℃ for acid washing for 22 hours, then washing with water with the flow rate of 1.2m/s for 20 minutes, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
By adopting the method provided by the embodiment, the oxide on the surface of the electrolytic nickel can be effectively removed, and the electrolytic nickel after the oxide is removed has a smooth surface and good brightness.
Example 4
The embodiment provides a method for removing an oxide on the surface of electrolytic nickel, which comprises the following steps:
and soaking the electrolytic nickel to be treated in hydrochloric acid with the mass concentration of 24wt% at 26 ℃ for acid washing for 24h, then washing with water with the flow rate of 1.2m/s for 35min, and drying to obtain the electrolytic nickel with surface oxides removed.
By adopting the method provided by the embodiment, the oxide on the surface of the electrolytic nickel can be effectively removed, and the electrolytic nickel after the oxide is removed has a smooth surface and good brightness.
Example 5
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in nitric acid with the mass concentration of 18wt% at 22 ℃ for acid washing for 24 hours, then flushing with water with the flow rate of 0.9m/s for 30 minutes, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
The method provided by the embodiment reduces the concentration of the nitric acid, and cannot effectively remove the oxide on the surface of the electrolytic nickel.
Example 6
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in 35wt% nitric acid at 22 ℃ for acid washing for 24h, then washing with water at the flow rate of 0.9m/s for 30min, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
The method provided by the embodiment improves the concentration of the nitric acid, and the washed metal nickel reacts with the dilute nitric acid, so that the loss of electrolytic nickel is increased.
Example 7
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in 25wt% nitric acid at 22 ℃ for acid pickling for 21h, then washing with water at the flow rate of 0.9m/s for 30min, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
The method provided by the embodiment shortens the reaction time of acid washing, and the oxide on the surface of the electrolytic nickel cannot be removed cleanly due to too short reaction time.
Example 8
The embodiment provides a method for removing electrolytic nickel surface oxide, which comprises the following steps:
and soaking the electrolytic nickel to be treated in 25wt% nitric acid at 22 ℃ for acid washing for 28h, then washing with water at the flow rate of 0.9m/s for 30min, and drying by using an air gun to obtain the electrolytic nickel without surface oxides.
The method provided by the embodiment increases the reaction time of acid washing, the reaction time is too long, the washed metal nickel reacts with dilute nitric acid, and the loss of electrolytic nickel is increased.
Example 9
This example provides a method of removing electrolytic nickel surface oxide which differs from example 1 only in that: in this example, nitric acid is changed to a mixed solution of nitric acid and hydrochloric acid, wherein the mass ratio of nitric acid to hydrochloric acid is 1.
The method provided by the embodiment can effectively remove the oxide on the surface of the electrolytic nickel, and the electrolytic nickel after the oxide is removed has smooth surface and good brightness.
Comparative example 1
This comparative example provides a method of removing electrolytic nickel surface oxide that differs from example 1 only in that: this comparative example changed nitric acid to sulfuric acid.
The oxide on the surface of the electrolytic nickel cannot be effectively removed by adopting the method provided by the comparative example.
In conclusion, the method for removing the oxide on the surface of the electrolytic nickel provided by the invention can completely remove the oxide on the surface of the electrolytic nickel by adopting the acid solution with lower concentration, and the safety coefficient is higher; concentrated nitric acid and/or hydrofluoric acid are not used and are relatively more environmentally friendly.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for removing electrolytic nickel surface oxide is characterized by comprising the following steps:
carrying out acid washing, water washing and drying on electrolytic nickel to be treated in sequence to obtain electrolytic nickel with surface oxides removed;
the pickling agent used in the pickling includes nitric acid and/or hydrochloric acid.
2. The method of removing electrolytic nickel surface oxide as claimed in claim 1, wherein the pickling comprises immersing the electrolytic nickel to be treated in a pickling agent.
3. The method for removing surface oxides of electrolytic nickel according to claim 1 or 2, characterized in that the mass concentration of the pickling agent used in the pickling is 20 to 30 wt.%.
4. A method for removing electrolytic nickel surface oxide according to any one of claims 1 to 3, characterized in that the pickling temperature is 20 to 30 ℃.
5. The method for removing electrolytic nickel surface oxide according to any one of claims 1 to 4, characterized in that the pickling time is 22 to 26 hours.
6. A method for the removal of electrolytic nickel surface oxides as claimed in any one of claims 1 to 5, characterized in that the water washing comprises rinsing the electrolytic nickel to be treated with flowing water.
7. The method for removing electrolytic nickel surface oxide according to any one of claims 1 to 6, characterized in that the flow rate of water in the water wash is 0.7 to 1.2m/s.
8. The method for removing electrolytic nickel surface oxide according to any one of claims 1 to 7, characterized in that the time of the water washing is 20 to 40min.
9. The method for removing electrolytic nickel surface oxide according to any one of claims 1 to 8, wherein the drying comprises oven drying or air gun blowing.
10. Method for removing electrolytic nickel surface oxides according to any one of claims 1 to 9, characterized in that it comprises the following steps:
soaking the electrolytic nickel to be treated in a pickling agent with the mass concentration of 20-30wt% at the temperature of 20-30 ℃ for pickling for 22-26h, then washing with water with the flow rate of 0.7-1.2m/s for 20-40min, and drying to obtain the electrolytic nickel without surface oxides.
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| CN110158085A (en) * | 2019-05-30 | 2019-08-23 | 郑州比克电池有限公司 | A kind of method that hydro-thermal method synthesizes porous nickel hydroxide in nickel foam substrate |
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2022
- 2022-07-07 CN CN202210803657.6A patent/CN115161646A/en active Pending
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|---|---|---|---|---|
| GB528209A (en) * | 1938-05-27 | 1940-10-24 | Mond Nickel Co Ltd | Improvements in and relating to composite metal structures |
| CN101397686A (en) * | 2007-09-27 | 2009-04-01 | 宝山钢铁股份有限公司 | Method for preparing nickel base alloy surface composite plating |
| CN102874882A (en) * | 2012-11-06 | 2013-01-16 | 东华大学 | Preparation method of porous Co3O4 nanosheet |
| CN106283128A (en) * | 2016-08-04 | 2017-01-04 | 浙江工业大学义乌科学技术研究院有限公司 | A kind of method of electrolytic preparation bright nickel in alkaline electrolyte |
| CN107868959A (en) * | 2016-09-23 | 2018-04-03 | 中国科学院金属研究所 | A kind of lithographic method for increasing foam nickel electrode electrochemical surface area |
| CN107758750A (en) * | 2017-10-19 | 2018-03-06 | 郑州比克电池有限公司 | A kind of method that hydro-thermal method prepares the nickel hydroxide nano piece of different-shape |
| CN110158085A (en) * | 2019-05-30 | 2019-08-23 | 郑州比克电池有限公司 | A kind of method that hydro-thermal method synthesizes porous nickel hydroxide in nickel foam substrate |
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