CN109056001B - Neodymium-iron-boron nickel electroplating solution, preparation method and use method thereof, and electroplated part - Google Patents
Neodymium-iron-boron nickel electroplating solution, preparation method and use method thereof, and electroplated part Download PDFInfo
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- CN109056001B CN109056001B CN201811245438.0A CN201811245438A CN109056001B CN 109056001 B CN109056001 B CN 109056001B CN 201811245438 A CN201811245438 A CN 201811245438A CN 109056001 B CN109056001 B CN 109056001B
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- 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
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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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
- C25D7/001—Magnets
Abstract
The invention discloses a neodymium iron boron nickel electroplating solution, which comprises the following components in concentration: 250-300g/L nickel sulfate, 15-25g/L magnesium sulfate, 40-50g/L sodium sulfate, 10-15g/L sodium chloride, 40-60g/L boric acid, 1-3g/L acetic acid, 0.5-0.8g/L saccharin, 3-5g/L sodium fluoride and the balance of water. The invention also discloses a preparation method and a use method of the neodymium iron boron nickel electroplating solution and an electroplated part. The invention can meet the binding force requirements and salt spray test requirements of neodymium iron boron products with different sizes and shapes, and the plated part has good performance.
Description
Technical Field
The invention relates to the technical field of electroplating. More specifically, the invention relates to a neodymium iron boron nickel electroplating solution, a preparation method, a using method and an electroplated part thereof.
Background
With the expansion of the application field of neodymium iron boron, the requirements of customers on products are continuously improved, the shapes of the products are more and more complex, the unit area is also continuously increased, the requirements on the electroplating technical level are higher and higher, and the electroplating speed, the bonding force and the salt spray time are the targets pursued by electroplating. During electroplating, the solution of the first layer of nickel is the key to determine the electroplating effect, and is the most important factor. The first layer of nickel is good in electroplating, which means that the bonding force requirement can be met, the bonding force is good, and the time of a salt spray test can be prolonged, so that how to improve the proportion of the first layer of nickel solution and enhance the bonding force and the salt spray time become the most urgent problem to be solved for the neodymium iron boron.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide the neodymium iron boron nickel electroplating solution, the preparation method, the use method and the electroplated part thereof, which can meet the binding force requirements and the salt spray test requirements of neodymium iron boron products with different sizes and shapes, and the electroplated part has good performance.
To achieve these objects and other advantages in accordance with the present invention, there is provided a neodymium iron boron electro-nickelling solution including the following components in concentrations: 250-300g/L nickel sulfate, 15-25g/L magnesium sulfate, 40-50g/L sodium sulfate, 10-15g/L sodium chloride, 40-60g/L boric acid, 1-3g/L acetic acid, 0.5-0.8g/L saccharin, 3-5g/L sodium fluoride and the balance of water.
Preferably, the following components are also included in the following concentrations: 0.05g/L of p-ethylbenzene sulfonamide, 0.1g/L of 3-butyn-1-ol, 0.04g/L of sodium p-toluenesulfinate and 0.4g/L of sodium allylsulfonate.
The preparation method of the neodymium iron boron nickel electroplating solution comprises the following preparation steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 2-4mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in the form of 10 vol.% hydrogen peroxide solution;
s5, adding 2-4g/L of activated carbon, stirring for 2 hours, and standing for 6-8 hours;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.1-0.4A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray.
Preferably, the following maintenance steps are also included:
A. testing once a week, and supplementing the components to the above concentration according to the test result;
B. adding 1-2mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in the form of 10 vol.% hydrogen peroxide solution;
C. filtering with activated carbon for 4 h;
D. corrugated board is used according to the current density of 0.1-0.4A/dm2Electrolyzing for more than 4h until the low current density area changes from dark black to light gray.
The neodymium iron boron electroplating piece is obtained by electroplating a neodymium iron boron product in a neodymium iron boron nickel electroplating solution.
Preferably, the neodymium iron boron electroplated part is a neodymium iron boron electroplated part with a nickel plating layer on the surface.
The application method of the neodymium iron boron nickel electroplating solution comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 40-60 ℃, immersing a deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution to serve as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
Preferably, before immersing the neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution, introducing inert gas into the neodymium iron boron magnet nickel electroplating solution to 3MPa, stirring, maintaining the pressure for 1h, then decompressing to atmospheric pressure, cooling to room temperature, and pumping to negative pressure.
The invention at least comprises the following beneficial effects:
firstly, the invention adds 15-25g/L magnesium sulfate and 40-50g/L sodium sulfate as conductive salts, thus enhancing the conductive capability of the solution, improving the current density, improving the current efficiency, shortening the time for plating a nickel layer, improving the binding force of the product substrate and the plating layer, and also having certain compensation function on pinholes generated in the electroplating process, certain leveling property of magnesium ions and sodium ions existing in the plating solution, fine electroplating crystals, and certain benefit on prolonging the salt spray test of large products, and the nickel chloride is replaced by the sodium chloride, thus reducing certain electroplating cost;
secondly, the formula of the invention adds p-ethyl benzene sulfonamide, 3-butyne-1-alcohol, sodium p-toluenesulfinate and sodium allylsulfonate, the materials are adsorbed on the growth point of the cathode through unsaturated carbon bonds, the cathode polarization is increased, the growth speed of the cathode surface tends to be consistent, the adsorption and desorption dynamic balance is realized, the tensile stress of the coating is balanced, the grain size of the coating is reduced, the ductility of the coating is good, the pinholes are few, the high-pressure dissolution-vacuum separation of inert gas is carried out, the plating solution raw materials are leveled, the discharge reaction of nickel ions during electroplating is hindered, the clean growth of the coating is inhibited, the grains deposited on the cathode are regularly arranged in parallel to the surface of the matrix, the grains are refined, and the coating is.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a wafer with a central point as a low current region test point;
FIG. 2 is a schematic diagram of a test point with a high current region at 1mm of the edge of the wafer.
Detailed Description
The present invention is further described in detail below with reference to examples to enable those skilled in the art to practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified.
< example 1>
The neodymium iron boron nickel electroplating solution comprises the following components in concentration: 250g/L of nickel sulfate, 15g/L of magnesium sulfate, 40g/L of sodium sulfate, 10g/L of sodium chloride, 40g/L of boric acid, 1g/L of acetic acid, 0.5g/L of saccharin, 3g/L of sodium fluoride and the balance of water.
The preparation method comprises the following steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 2mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in a hydrogen peroxide solution form of 10 vol.%;
s5, adding 2g/L of activated carbon, stirring for 2h, and standing for 6 h;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.1A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray.
The application method of the neodymium iron boron nickel electroplating solution comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 40 ℃, immersing the deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution to be used as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
< example 2>
The neodymium iron boron nickel electroplating solution comprises the following components in concentration: 300g/L of nickel sulfate, 25g/L of magnesium sulfate, 50g/L of sodium sulfate, 15g/L of sodium chloride, 60g/L of boric acid, 3g/L of acetic acid, 0.8g/L of saccharin, 5g/L of sodium fluoride and the balance of water.
The preparation method comprises the following steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 4mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in a hydrogen peroxide solution form of 10 vol.%;
s5, adding 4g/L of activated carbon, stirring for 2 hours, and standing for 8 hours;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.4A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray.
The application method of the neodymium iron boron nickel electroplating solution comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 60 ℃, immersing the deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution to be used as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
< example 3>
The neodymium iron boron nickel electroplating solution comprises the following components in concentration: 280g/L of nickel sulfate, 20g/L of magnesium sulfate, 45g/L of sodium sulfate, 12g/L of sodium chloride, 50g/L of boric acid, 3g/L of acetic acid, 0.6g/L of saccharin, 4g/L of sodium fluoride and the balance of water.
The preparation method comprises the following steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 3mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in a hydrogen peroxide solution form of 10 vol.%;
s5, adding 3g/L of activated carbon, stirring for 2 hours, and standing for 7 hours;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.3A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray.
The application method of the neodymium iron boron nickel electroplating solution comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 50 ℃, immersing the deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution to be used as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
< example 4>
The neodymium iron boron nickel electroplating solution comprises the following components in concentration: 280g/L of nickel sulfate, 20g/L of magnesium sulfate, 45g/L of sodium sulfate, 12g/L of sodium chloride, 50g/L of boric acid, 3g/L of acetic acid, 0.6g/L of saccharin, 4g/L of sodium fluoride, 0.05g/L of p-ethyl benzene sulfonamide, 0.1g/L of 3-butyn-1-ol, 0.04g/L of p-toluene sodium sulfinate, 0.4g/L of sodium allyl sulfonate and the balance of water.
The preparation method comprises the following steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 3mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in a hydrogen peroxide solution form of 10 vol.%;
s5, adding 3g/L of activated carbon, stirring for 2 hours, and standing for 7 hours;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.3A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray.
The application method of the neodymium iron boron nickel electroplating solution comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 50 ℃, introducing inert gas into the neodymium iron boron magnet nickel electroplating solution to 3MPa, stirring, maintaining the pressure for 1h, then decompressing to atmospheric pressure, cooling to room temperature, pumping to negative pressure, heating to 50 ℃, immersing the deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
< comparative example 1>
The formulation of the neodymium iron boron electro-nickel plating solution is the same as that of example 3, except that the content of magnesium sulfate is 4 g/L.
The preparation method is the same as example 3.
< comparative example 2>
The formulation of the neodymium-iron-boron electro-nickel plating solution is the same as that of example 3, except that the content of magnesium sulfate is 35 g/L.
The preparation method is the same as example 3.
< comparative example 3>
The formulation of the neodymium-iron-boron electro-nickel plating solution is the same as that of example 3, except that magnesium sulfate and sodium sulfate are not contained in the formulation, and 12g/L of sodium chloride is replaced by 45g/L of nickel chloride.
The preparation method is the same as example 3.
< test for uniformity of plating thickness >
The neodymium iron boron nickel electroplating solutions prepared in example 3, comparative example 1 and comparative example 2 were subjected to nickel plating, the same electroplated parts were subjected to test analysis, as shown in fig. 1 and 2, and the test results are shown in table 1, it can be seen that the difference between the high current region and the low current region of example 3 is 1.8-2.3, the average value is 1.97, and the fluctuation range is 0.5; comparative example 1 the difference between the high current region and the low current region was in the range of 2.1 to 3.2, the average value was 2.84, and the fluctuation range was 0.9; comparative example 2 the difference between the high current region and the low current region was in the range of 2.8 to 3.6, the average value was 3.12, and the fluctuation range was 0.8; in summary, example 3 has the least difference between the high current region and the low current region and the least fluctuation.
TABLE 1
< bonding force and salt spray test >
The neodymium iron boron nickel electroplating solutions prepared in the examples 3 and the comparative examples 3 are subjected to nickel plating, the test results of the same electroplated parts are shown in table 2, and it can be seen that in the bonding force test, 2 times of disqualification exist in 10 times of tests in the comparative example 3, the disqualification rate is 80%, and 0 time of disqualification exists in 10 times of tests in the examples 3, the disqualification rate is 0%, and the results are better than those in the comparative example 3; in the salt spray test, in the 10 tests of the comparative example 3, the salt spray test time length is 36-48h, in the 10 tests of the example 3, the salt spray test time length is 96-114h, the salt spray test time length is increased by more than 2.5 times, and the advantages are obvious. The same plated article, based on the plating thickness of 15 μm, had a difference between the high current region and the low current region of 2.9 to 3.7 and an average value of 3.27 μm in comparative example 3, while the difference between the high current region and the low current region of 1.8 to 2.3 and an average value of 1.97 in example 3, the uniformity of the plating thickness was superior to that in comparative example 3.
TABLE 2
< test on plating Performance >
The NdFeB electronickelling solutions prepared in examples 3, 4 and 3 were nickel-plated, and the same plated articles were subjected to test analysis (Current Density 4A/dm)2) The test results are shown in table 3, and it can be seen that the formulation of example 4 is significantly better than that of comparative example 3.
The detection of the brightness of the plating layer is based on the grading reference standard of the visual brightness experience assessment method which is commonly used at present, and the grading reference standard is as follows:
level 1: bright mirror surface: the plating layer is as bright as a mirror, so that the five sense organs and the eyebrows of a person can be clearly distinguished;
and 2, stage: brightness: the surface of the plating layer is bright, so that the five sense organs and the eyebrows of a human can be seen, but the eyebrow part is not clear enough;
and 3, level: semi-bright: the surface of the coating is relatively bright, but the outline of the five sense organs of a human body can be seen, and the eyebrow part is fuzzy;
4, level: no brightness: the plating layer is basically dull and cannot clearly see the outline of five sense organs of the human face;
and (3) detecting the deposition rate of the plating solution:
respectively weighing the weight of the sample before and after plating by an electronic balance, taking the weight gain of the matrix in unit time as the deposition speed,
deposition rate (weight of sample after nickel plating-weight of sample before nickel plating)/plating time
And (3) detecting the current efficiency of the plating solution:
the current efficiency generally refers to the cathode current efficiency, the ratio of the theoretical consumed electricity to the actual consumed electricity, the actual consumed electricity is calculated by the current, time and electrochemical equivalent of the deposited metal,
current efficiency (weight of sample after nickel plating-weight of sample before nickel plating)/(current used at the time of plating × electrochemical equivalent of cathode deposit) × 100%
And (3) testing the dispersing ability of the plating solution:
the measuring of the dispersing ability adopts a far and near cathode method, the distance ratio of the far and near cathodes to the anode is 2:1, copper sheets with the size of 20mm multiplied by 30mm and the thickness of 0.5mm are respectively hung at the two ends of the beaker to be used as the cathode, an electric control or reticular nickel sheet with the size equal to that of the cathode is hung between the two cathodes to be used as the anode,
the dispersion capacity is (distance ratio between the near and far cathodes and the anode-weight gain of the near cathode/weight gain of the far cathode)/(distance ratio between the near and far cathodes and the anode + weight gain of the near cathode/weight gain of the far cathode-2) × 100%
TABLE 3
| Brightness property | Deposition Rate (mg/h) | Current efficiency (%) | Dispersibility (%) | |
| Example 3 | 2 | 267 | 94.12 | 40.11 |
| Example 4 | 1 | 289 | 95.66 | 47.75 |
| Comparative example 3 | 3 | 169.5 | 89.57 | 21.58 |
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the examples shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (6)
1. The neodymium iron boron nickel electroplating solution is characterized by comprising the following components in concentration: 250-300g/L nickel sulfate, 15-25g/L magnesium sulfate, 40-50g/L sodium sulfate, 10-15g/L sodium chloride, 40-60g/L boric acid, 1-3g/L acetic acid, 0.5-0.8g/L saccharin, 3-5g/L sodium fluoride and the balance of water;
the preparation method comprises the following preparation steps:
s1, adding pure water to the position of the plating bath 2/3, and heating to 60-70 ℃;
s2, adding the components with the above concentrations, and stirring to completely dissolve the components;
s3, adding nickel carbonate, and adjusting the pH value to 4.8-5.2;
s4, adding 2-4mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in the form of 10 vol.% hydrogen peroxide solution;
s5, adding 2-4g/L of activated carbon, stirring for 2 hours, and standing for 6-8 hours;
s6, filtering;
s7, adjusting the pH to 4.0-4.8 with 10 wt.% sulfuric acid;
s8, using corrugated board according to the current density of 0.1-0.4A/dm2Electrolyzing for more than 6h until the low current density area changes from dark black to light gray;
the using method comprises the steps of adjusting the pH value of the neodymium iron boron nickel electroplating solution to 4.0-5.5, heating to 40-60 ℃, immersing the deoiled and pickled neodymium iron boron product into the neodymium iron boron magnet nickel electroplating solution to be used as a cathode, taking metal nickel as an anode, and introducing direct current to obtain a coating.
2. The neodymium-iron-boron electronickelling solution of claim 1, wherein the formulation further comprises the following components in concentration: 0.05g/L of p-ethylbenzene sulfonamide, 0.1g/L of 3-butyn-1-ol, 0.04g/L of sodium p-toluenesulfinate and 0.4g/L of sodium allylsulfonate.
3. The neodymium-iron-boron electronickelling solution according to claim 1, wherein the preparation method further comprises the following maintenance steps:
A. testing once a week, and supplementing the components to the above concentration according to the test result;
B. adding 1-2mL/L hydrogen peroxide, stirring and inflating for 2h, wherein the hydrogen peroxide is added in the form of 10 vol.% hydrogen peroxide solution;
C. filtering with activated carbon for 4 h;
D. corrugated board is used according to the current density of 0.1-0.4A/dm2Electrolyzing for more than 4h until the low current density area changes from dark black to light gray.
4. The NdFeB electronickelling solution of claim 1, wherein before immersing the NdFeB product into the NdFeB magnet electronickelling solution, the NdFeB magnet electronickelling solution is filled with inert gas to 3MPa, stirred, kept for 1h, then decompressed to atmospheric pressure, cooled to room temperature, and pumped to negative pressure.
5. A neodymium iron boron electroplated part, which is obtained by electroplating a neodymium iron boron product in the neodymium iron boron nickel electroplating solution of any one of claims 1 to 4.
6. The NdFeB electroplate of claim 5, wherein the NdFeB electroplate is a NdFeB electroplate having a nickel plating on a surface thereof.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4917778A (en) * | 1989-05-26 | 1990-04-17 | Yugen Kaisha Johoku Riken Kogyo | Process for the corrosion protection of neodymium-iron-boron group sintered magnets |
| CN102978679A (en) * | 2012-08-10 | 2013-03-20 | 浙江东阳东磁有限公司 | Neodymium-iron-boron magnet nickel electroplating solution and use method thereof |
| CN105220194A (en) * | 2015-10-16 | 2016-01-06 | 宁波韵升磁体元件技术有限公司 | A kind of method for electroplating nickel of neodymium iron boron thin slice magnet steel product |
| CN105696029A (en) * | 2014-11-28 | 2016-06-22 | 重庆市巴南区仁荣机械厂 | Preparation method of nickel plating solution |
-
2018
- 2018-10-24 CN CN201811245438.0A patent/CN109056001B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4917778A (en) * | 1989-05-26 | 1990-04-17 | Yugen Kaisha Johoku Riken Kogyo | Process for the corrosion protection of neodymium-iron-boron group sintered magnets |
| CN102978679A (en) * | 2012-08-10 | 2013-03-20 | 浙江东阳东磁有限公司 | Neodymium-iron-boron magnet nickel electroplating solution and use method thereof |
| CN105696029A (en) * | 2014-11-28 | 2016-06-22 | 重庆市巴南区仁荣机械厂 | Preparation method of nickel plating solution |
| CN105220194A (en) * | 2015-10-16 | 2016-01-06 | 宁波韵升磁体元件技术有限公司 | A kind of method for electroplating nickel of neodymium iron boron thin slice magnet steel product |
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