CN105568348A - Method for assisting composite plating with magnetic field - Google Patents

Method for assisting composite plating with magnetic field Download PDF

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Publication number
CN105568348A
CN105568348A CN201610033756.5A CN201610033756A CN105568348A CN 105568348 A CN105568348 A CN 105568348A CN 201610033756 A CN201610033756 A CN 201610033756A CN 105568348 A CN105568348 A CN 105568348A
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plating
magnetic field
composite
concentration
core
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张全生
摩尔根
尹佳佳
张道明
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Shanghai Institute of Technology
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Shanghai Institute of Technology
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D5/006

Abstract

The invention provides a method for assisting composite plating with a magnetic field. Magnetic iron sesquioxide particles of a core-shell structure are ultrasonically dispersed in electroplate liquid; under the action of the applied magnetic field, the magnetic particles, dispersed in the electroplate liquid, of the core-shell structure are adsorbed to the surface of a cathode; and current passes through an electroplate system, the magnetic particles, adsorbed to the cathode, of the core-shell structure are gradually compounded into a metal coating along with increase of the thickness of a deposited metal layer, and a composite coating is formed. The content of the magnetic composite particles in the composite coating can be controlled by controlling the additive number of the composite particles, the current density of the composite plating cathode and the strength of the magnetic field.

Description

A kind of employing magnetic field assisted recombination electric plating method
Technical field
The invention belongs to technical field of surface, relate to a kind of composite electric plating method, specifically a kind of employing magnetic field assisted recombination electric plating method.
Background technology
Magnetic ferric oxide not only has the magnetic property of ferric oxide after coated, is also provided with the surface property of coating layer, and the core-shell structure magnetic particulate of dual property is widely used in catalysis, environment, medicine and other fields.
About the preparation of core-shell structure magnetic Indian red, have and study widely, composite particles as coated by titanium dioxide ferric oxide mostly is spherical, the preparation method being spherical core-shell type magnetic ferric oxide composite particles that CN101186762A, CN101037205A, CN101205420A, CN101783217A, CN101752049 introduce; CN101707106A, CN1445797A, CN1477082A describe the preparation method of the martial ethiops composite particles of spherical monokaryon or multinuclear, can not obtain the monokaryon magnetic core-shell particulate of high dispersive; CN103357360A, CN103157430A describe the martial ethiops composite particles of the hud typed coated by titanium dioxide adopting the precursor synthesis of ferric oxide spherical; CN103721714A has prepared axiolitic magnetic particle, by controlling ferric oxide particle and titanium sulfate solution mol ratio, obtains the composite particles of thick shell structure.SiO 2, Al 2o 3, ZrO 2deng coating layer, the core-shell structure magnetic particulate of SiC, BC, C coating layer also obtains investigation and application.
Inorganic particles composite plating mainly relies on particulate to adhere on electrode, composite plating enters in coating, this adhesive attraction is subject to the impact of particulate and electrode characteristic, also relevant with solution composition and performance and plating conditions, and in coating, the Content and distribution of particulate is difficult to control.
Summary of the invention
The invention provides a kind of employing magnetic field assisted recombination electric plating method, described this employing magnetic field assisted recombination electric plating method solves microparticulate in the plating solution existed in conventional composite plating, the technical problem of the difficulty of fraction of particle and distributed controll in coating.
The invention provides a kind of employing magnetic field assisted recombination electric plating method, comprise the steps:
(1) the magnetic ferric oxide microparticulate ultrasound of nucleocapsid structure is dispersed in electroplate liquid;
(2) under the effect of externally-applied magnetic field, dispersion core-shell structure magnetic particulate is in the plating solution adsorbed on cathode surface;
(3) electric current is passed through plating system, the core-shell structure magnetic particulate being adsorbed on negative electrode increases with metal refining layer thickness, is progressively compound in metal plating, forms composite deposite.
Further, in step (1), the coated shell of core-shell structure magnetic ferric oxide microparticle surfaces is SiO 2, TiO 2, ZrO 2, or Al 2o 3deng oxide skin, or be the carbide such as SiC, C, BC.
Further, in step (1), core-shell structure magnetic ferric oxide content is in the plating solution 1-3g/L.
Further, the pattern of core-shell structure magnetic ferric oxide is spherical, elliposoidal or needle-like in step (1), and the diameter of particle of core-shell structure magnetic ferric oxide is less than 1 micron.
Further, in step (1), electroplate liquid is to ensure that core-shell structure magnetic particulate constituent stablizes the monometallic electroplate liquid system of plating Cu, Ni, Zn, Cr layer, or Zn-Ni, Cu-Sn alloy plating liquid system.
Further, externally-applied magnetic field provides for permanent magnet in step (2), or is provided by electromagnet.
Further, the magnet in step (2) is placed on negative electrode side, and keeps and cathode parallel position.
Further, in step (2), cathode base is before absorption core-shell structure magnetic particulate carries out composite plating, and by polished finish or the process of electroplating bright coating, the gauge control of bright coating is below 5 microns.
Further, by repeating step (1)-(3), can obtain the composite deposite of multilayered structure, the gauge control of the metal plating of outermost layer structure is at 40 ~ 60% of core-shell structure magnetic diameter of particle.
Concrete, above-mentioned one adopts magnetic field assisted recombination electric plating method, comprises the steps:
1) compound concentration is 1 ~ 5g/L core-shell structure magnetic composite particles suspension liquid, ultrasonic disperse 0.5 ~ 2 hour;
2) step of a preparation bright nickel plating bath; First take single nickel salt, nickelous chloride, pour in a container, add water stirring and make it dissolve; Add the boric acid solution of having dissolved again, obtain basic bath, then add sodium lauryl sulphate, asccharin, butynediol, in above-mentioned bright nickel plating bath, the concentration of single nickel salt is 300g/L, the concentration of nickelous chloride is 40g/L, and the concentration of boric acid is 30g/L, and the concentration of sodium lauryl sulphate is 0.05g/L, the concentration of asccharin is 0.5g/L, the concentration of butynediol is 0.25g/L, T=55-60 DEG C, J=3A/dm 2, pH=3.8-4.4;
3) step of a preparation composite nickel-plating liquid; First take single nickel salt, nickelous chloride, join in a reaction vessel, add water stirring and make it dissolve, add the boric acid solution of having dissolved wherein, the pH=2.0-4.5 of above-mentioned composite nickel-plating liquid, T=55-60 DEG C, the concentration of boric acid in above-mentioned composite nickel-plating liquid is 20g/L; The concentration of single nickel salt in above-mentioned composite nickel-plating liquid is 300g/L, and the concentration of nickelous chloride in above-mentioned composite nickel-plating liquid is 40g/L;
4) a pretreated step of negative electrode, negative electrode is made with copper sheet, according to polishing, cold wash, electrochemical deoiling, cold wash, the weak etch of diluted acid, the step of cold wash carries out pre-treatment, electrochemical deoiling adopts alkaline degreasing system, described alkaline degreasing system is by sodium hydroxide, sodium carbonate, sodium phosphate, water glass and deionized water composition, in described alkaline degreasing system, the concentration of sodium hydroxide is 8g/L, the concentration of sodium carbonate is 60g/L, the concentration of sodium phosphate is 60g/L, the concentration of water glass is 6g/L, electrochemical deoiling temperature is 80-90 DEG C, time is 3-5 minute, carry out in the process of weak etch at employing diluted acid, diluted acid to be mass percent concentration be 3 ~ 8% sulphuric acid soln, the etch time is 0.5-1min,
5) step of a bright nickel plating; With the bright nickel plating bath that step (2) is prepared, on step (4) pretreated red copper matrix, electroplating the light that a layer thickness is 500 ~ 700nm, smooth coating in advance as bottom, the current density of bright nickel plating adopts 2-3A/dm 2;
6) one adopts the step of magnetic field assisted recombination electronickelling; The hanging drop of core-shell structure magnetic particulate step (1) prepared is added in the composite nickel-plating electroplate liquid that step (3) prepares, described suspension and the volume ratio of electroplate liquid are 2 ~ 4:200, abundant dispersion, magnetic field is added in coating bath outer cathode side, after the complete uniform adsorption negative electrode of the core-shell structure magnetic particulate suspended in electroplated liquid, plating is started according to composite nickel-plating technique, the gauge control of matrix metal nickel dam is at 600-2200nm, repetitive operation, obtains the ellipsoid shape magnetic composite particle γ-Fe containing aligning 2o 3/ TiO 2composite deposite.
Concrete, magnetic field is provided by electro-magnet, and magneticstrength is controlled by the strength of current controlling electro-magnet.
The core-shell structure particles that the present invention is core with magnetic ferric oxide disperses in the plating solution, utilize the magneticaction of externally-applied magnetic field, the core-shell structure magnetic particulate be suspended in electroplate liquid is adsorbed on negative electrode, matrix metal is separated out at negative electrode by the method for DC electrodeposition, the magnetic-particle compound being adsorbed on cathode surface is entered in coating by depositing metal layers, obtains composite deposite.The core-shell structure magnetic particulate of absorption is embedded in matrix metal, obtain composite deposite.
The present invention compares with prior art, and its technical progress is significant.Under the effect of outside magnetic field of the present invention, magnetic-particle is adsorbed on cathode surface, simultaneously electroplated metal layer.The present invention, by controlling composite particles addition, composite plating cathode current density, magneticstrength, can control magnetic composite particle content in composite deposite.
Accompanying drawing explanation
Fig. 1 is the SEM figure of coated by titanium dioxide magnetic ferric oxide particulate under amplification 80,000 times of ellipsoid shape nucleocapsid structure.
Fig. 2 is the Ni-(γ-Fe of embodiment 1 gained 2o 3/ TiO 2) composite deposite microscopic appearance.
Embodiment
Also by reference to the accompanying drawings the present invention is set forth further below by specific embodiment, but do not limit the present invention.
Embodiment 1
A kind of employing magnetic field assisted recombination electric plating method, comprises the steps:
(1), compound concentration is the composite particles suspension liquid of 2.5g/L: take 0.05g nucleocapsid structure composite particles γ-Fe 2o 3/ TiO 2, put into Erlenmeyer flask, measure 20mL distilled water and add in Erlenmeyer flask, stir ultrasonic disperse 1 hour, for subsequent use;
(2), the preparation of bright nickel plating bath; Bright nickel plating liquid formula, as preplating plating solution, first takes 300g single nickel salt, 40g nickelous chloride, pours in beaker to add deionized water and stirring and make it dissolve; In another one beaker, take 30g boric acid, heated and stirred makes boric acid dissolve, and the boric acid solution of dissolving carefully is poured in the nickel salt solution prepared, obtains basic bath.0.05g sodium lauryl sulphate is added, 0.5g asccharin, 0.25g butynediol, adjustment liquor capacity to liter in basic bath.This plating solution electroplating technology scope: T=60 DEG C, J=3A/dm 2, pH=3.8.
(3), the preparation of composite nickel-plating liquid; First take 300g single nickel salt, 40g nickelous chloride, pour in beaker add tap water stir make it dissolve; Take 20g boric acid in another beaker, heated and stirred makes boric acid dissolve, and the boric acid solution of dissolving carefully is poured in the nickel salt solution of preparation, and adding distil water obtains one liter to complete soln volume.This plating solution processing range: T=60 DEG C, J=3A/dm 2, pH=4.5.
(4), electrochemical deoiling preparation method; Weighing sodium hydroxide 8g, sodium carbonate 60g, sodium phosphate 60g/L, water glass 6g/L, prepares degreasing fluid with deionized water dissolving.Copper sheet through sanding and polishing is put into 85 DEG C of degreasing fluid oil removal treatment 3 minutes.After clean by washed with de-ionized water, the dilution heat of sulfuric acid with 5% carries out etch, and the time is 1min.
(5), copper sheet bright nickel plating: Ni-based Composite Coatings electroplate all in advance before plating a layer thickness be the light of 600nm, smooth coating as bottom, the current density of bright nickel plating adopts 3A/dm 2.
(6), composite nickel-plating; Red copper electrode composite plating after bright nickel plating.Get 200 milliliters of composite nickel-plating solution, the suspension of the prepared composite particles of a certain amount of (3mL) is pipetted with transfer pipet, join in composite plating bath, make composite particles dispersed in the plating solution, leave standstill 3 minutes afterwards, enable magnetic composite particle fully and directed be arranged on negative electrode, then carrying out composite plating.Composite nickel-plating current density adopts 3/dm 2; Simultaneously at coating bath externally-applied magnetic field, it is parallel with it that magnet is placed on negative electrode side, can carry out composite plating, and likely obtain the ellipsoid shape magnetic composite particle nickel plating (γ-Fe containing aligning under a small amount of particulate exists 2o 3/ TiO 2) composite deposite.
The pattern of the coated by titanium dioxide magnetic ferric oxide particulate of above-mentioned ellipsoid shape nucleocapsid structure as shown in Figure 1, as can be seen from Figure 2 nickel plating (γ-Fe 2o 3/ TiO 2) composite particles of high areal density in composite deposite.Show by preparation method of the present invention thus, in magnetic field, auxiliary lower composite plating, can obtain the nickel plating (γ-Fe of high density composite particulate 2o 3/ TiO 2) composite deposite.
Described content be only the present invention conceive under basic explanation, and according to any equivalent transformation that technical scheme of the present invention is done, all should protection scope of the present invention be belonged to.

Claims (10)

1. adopt a magnetic field assisted recombination electric plating method, it is characterized in that comprising the steps:
(1) the magnetic ferric oxide microparticulate ultrasound of nucleocapsid structure is dispersed in electroplate liquid;
(2) under the effect of externally-applied magnetic field, dispersion core-shell structure magnetic particulate is in the plating solution adsorbed on cathode surface;
(3) electric current is passed through plating system, the core-shell structure magnetic particulate being adsorbed on negative electrode increases with metal refining layer thickness, is progressively compound in metal plating, forms composite deposite.
2. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, is characterized in that: in step (1), the coated shell of core-shell structure magnetic ferric oxide microparticle surfaces is SiO 2, TiO 2, ZrO 2, Al 2o 3deng oxide skin, SiC, C or be the carbide lamellas such as BC.
3. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, is characterized in that: in step (1), core-shell structure magnetic ferric oxide content is in the plating solution 1-3g/L.
4. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, it is characterized in that: the pattern of core-shell structure magnetic ferric oxide is spherical, elliposoidal or needle-like in step (1), and the diameter of particle of core-shell structure magnetic ferric oxide is less than 1 micron.
5. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, it is characterized in that: in step (1), electroplate liquid is to ensure that core-shell structure magnetic particulate constituent stablizes the monometallic electroplate liquid system of plating Cu, Ni, Zn, Cr layer, or Zn-Ni, Cu-Sn alloy plating liquid system.
6. as claimed in claim 1 a kind of adopt magnetic field assisted recombination electric plating method, it is characterized in that: in step (2), externally-applied magnetic field provides for permanent magnet, or is provided by electromagnet.
7. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, is characterized in that: the magnet in step (2) is placed on negative electrode side, and keeps and cathode parallel position.
8. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, it is characterized in that: in step (2), cathode base is before absorption core-shell structure magnetic particulate carries out composite plating, by polished finish or the process of electroplating bright coating, the gauge control of bright coating is below 5 microns.
9. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, it is characterized in that: by repeating step (1)-(3), can obtain the composite deposite of multilayered structure, the gauge control of the metal plating of outermost layer structure is at 40 ~ 60% of core-shell structure magnetic diameter of particle.
10. a kind of employing magnetic field as claimed in claim 1 assisted recombination electric plating method, is characterized in that comprising the steps:
1) compound concentration is 1 ~ 5g/L core-shell structure magnetic composite particles suspension liquid, ultrasonic disperse 0.5 ~ 2 hour;
2) step of a preparation bright nickel plating bath, first takes single nickel salt, nickelous chloride, pours in a container, adds water stirring and makes it dissolve; Add the boric acid solution of having dissolved again, obtain basic bath, then add sodium lauryl sulphate, asccharin, butynediol, in above-mentioned bright nickel plating bath, the concentration of sodium lauryl sulphate is 0.01-0.05g/L, the concentration of asccharin is 0.3-0.5g/L, and the concentration of butynediol is 0.2-0.25g/L, and the concentration of single nickel salt is 300-350g/L, the concentration of nickelous chloride is 35-40g/L, the concentration of boric acid is 20-30g/L, T=55-60 DEG C, J=3A/dm 2, pH=3.8-4.4;
3) step of a preparation composite nickel-plating liquid, first take single nickel salt, nickelous chloride, join in a reaction vessel, adding water stirring makes it dissolve, add the boric acid solution of having dissolved wherein, the pH=2.0-4.5 of above-mentioned composite nickel-plating liquid, T=55-60 DEG C, the concentration of boric acid in above-mentioned composite nickel-plating liquid is 20-30g/L; The concentration of single nickel salt in above-mentioned composite nickel-plating liquid is 300-350g/L, and the concentration of nickelous chloride in above-mentioned composite nickel-plating liquid is 35-40g/L;
4) a pretreated step of negative electrode, negative electrode is made with copper sheet, according to polishing, cold wash, electrochemical deoiling, cold wash, the weak etch of diluted acid, the step of cold wash carries out pre-treatment, electrochemical deoiling adopts alkaline degreasing system, described alkaline degreasing system is by sodium hydroxide, sodium carbonate, sodium phosphate, water glass and deionized water composition, in described alkaline degreasing system, the concentration of sodium hydroxide is 6-8g/L, the concentration of sodium carbonate is 50-60g/L, the concentration of sodium phosphate is 60-70g/L, the concentration of water glass is 6-10g/L, electrochemical deoiling temperature is 80-90 DEG C, time is 3-5 minute, carry out in the process of weak etch at employing diluted acid, diluted acid to be mass percent concentration be 3 ~ 8% sulphuric acid soln, the etch time is 0.5-1min,
5) step of a bright nickel plating; With the bright nickel plating bath that step (2) is prepared, on step (4) pretreated red copper matrix, electroplating the light that a layer thickness is 500 ~ 700nm, smooth coating in advance as bottom, the current density of bright nickel plating adopts 2-3A/dm 2;
6) one adopts the step of magnetic field assisted recombination electronickelling; The hanging drop of core-shell structure magnetic particulate step (1) prepared is added in the composite nickel-plating electroplate liquid that step (3) prepares, described suspension and the volume ratio of electroplate liquid are 2 ~ 4:200, abundant dispersion, magnetic field is added in coating bath outer cathode side, after the complete uniform adsorption negative electrode of the core-shell structure magnetic particulate suspended in electroplated liquid, plating is started according to composite nickel-plating technique, the gauge control of matrix metal nickel dam is at 600-2200nm, repetitive operation, obtains the ellipsoid shape magnetic composite particle γ-Fe containing aligning 2o 3/ TiO 2composite deposite.
CN201610033756.5A 2016-01-19 2016-01-19 Method for assisting composite plating with magnetic field Pending CN105568348A (en)

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Cited By (5)

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CN107740171A (en) * 2017-09-14 2018-02-27 浙江大学 Magnetic response mineralized collagen coating of structure-controllable for medical metal implant surfaces and preparation method thereof
CN108103565A (en) * 2018-02-05 2018-06-01 深圳市瑞世兴科技有限公司 A kind of crystal grain refinement metal plating device
CN108728884A (en) * 2018-06-28 2018-11-02 浙江惠尔涂装环保设备有限公司 A kind of magnetic field type list anode cathode electrophoretic painting equipment
US11512407B2 (en) 2020-08-18 2022-11-29 Jiangsu University Method and device for laser-assisted electrochemical composite deposition using rifling-type hollow rotating electrode
CN115787014A (en) * 2022-11-30 2023-03-14 江苏东方九天新能源材料有限公司 Surface treatment process for battery nickel-plated steel strip

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Publication number Priority date Publication date Assignee Title
CN107740171A (en) * 2017-09-14 2018-02-27 浙江大学 Magnetic response mineralized collagen coating of structure-controllable for medical metal implant surfaces and preparation method thereof
CN108103565A (en) * 2018-02-05 2018-06-01 深圳市瑞世兴科技有限公司 A kind of crystal grain refinement metal plating device
CN108728884A (en) * 2018-06-28 2018-11-02 浙江惠尔涂装环保设备有限公司 A kind of magnetic field type list anode cathode electrophoretic painting equipment
US11512407B2 (en) 2020-08-18 2022-11-29 Jiangsu University Method and device for laser-assisted electrochemical composite deposition using rifling-type hollow rotating electrode
CN115787014A (en) * 2022-11-30 2023-03-14 江苏东方九天新能源材料有限公司 Surface treatment process for battery nickel-plated steel strip
CN115787014B (en) * 2022-11-30 2023-10-13 江苏东方九天新能源材料有限公司 Surface treatment process of nickel-plated steel strip of battery

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Application publication date: 20160511