CN106119909A - Nickel Nano diamond wear-resisting strengthening composite coating method is prepared with the pulse power - Google Patents

Nickel Nano diamond wear-resisting strengthening composite coating method is prepared with the pulse power Download PDF

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CN106119909A
CN106119909A CN201610769607.5A CN201610769607A CN106119909A CN 106119909 A CN106119909 A CN 106119909A CN 201610769607 A CN201610769607 A CN 201610769607A CN 106119909 A CN106119909 A CN 106119909A
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solution
nano diamond
coating
plating
sample
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刘美华
李菲晖
杨超
孟毅
张晓川
巩运兰
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Tianjin University of Commerce
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
    • 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
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/18—Electroplating using modulated, pulsed or reversing current
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Nickel Nano diamond wear-resisting strengthening composite coating method prepared by the open one pulse power of the present invention.Bath composition of the present invention is NiSO4·6H2O 240g/L, NiCl2·6H2O 20g/L, H3BO320g/L, Nano diamond 8g/L, electro-deposition process parameter is 45 DEG C, pH=4, electric current density are 2A/dm2, low whipping speed is plating 1h under conditions of 10r/min.Using SMD 10 type numerical control dual-pulse power supply, output current wave is square wave, and output frequency is 5 5000HZ, dutycycle is 0 100%, and maximum output peak point current is 10A.Experimental result is: coating hardness and elastic modelling quantity prepared by the DC electrodeposition under consistency and elasticity modular ratio the same terms of coating prepared by employing dipulse coating want height, when positive pulse is 50ms, the consistency and elasticity modulus of composite deposite reaches 5.23GPa and 197.38GPa, surface roughness value Ra is 0.792 μm.

Description

Nickel-nanodiamond wear-resisting strengthening composite coating method is prepared with the pulse power
Technical field
The present invention relates to prepare wear-resisting strengthening composite coating field, more specifically, relate to one and prepare nickel-nanometer gold The method of the wear-resisting strengthening composite coating of hard rock.
Background technology
Q235A can preferably coordinate because of performances such as intensity, plasticity, welding, and its combination property is preferable, therefore is widely used In the making of the machine components the highest to performance requirement and other unessential grinding tool parts.But, the wearability of Q235A Relatively low, under natural environment, its chemical stability is relatively low, the most corrosion-resistant.Domestic traditional secondary battery and primary alkaline battery Shell uses mild steel nickel plating to improve its corrosion resistance.Current state-of-the-art method is first to mild-carbon steel strip nickel plating, then Again the steel band of nickel plating is carried out deep-draw, directly obtain the battery steel shell of nickel plating.This production technology has that efficiency is high, speed fast, Low cost and other advantages, but it must be ensured that coating is complete, it is impossible to has crackle, fold, more can not come off.Preferably nickel coating has Higher intensity, toughness, hardness and corrosion resistance, can preferably improve abrasion resistance and the corrosion resistance on base material top layer.
Liquid phase composite deposition technology is to add one or several insoluble solid granules in a liquid, makes solid particle and base The process of matter codeposition.Root it is documented, that the most successfully study composite deposite is the Grazen of the U.S. in 1962. 1970, SiC/Ni composite deposite was applied in Wankel electromotor make as antiwear and antifriction material by Metzger et al. first With, and be the most still advantageously applied in wear part and auto industry.Utilize that composite deposition technology prepares is compound Coating, can be divided into the coating such as scuff-resistant coating, ware reducing coating layer, resistance to high temperature oxidation coating, heat-resisting and various protection by function, wherein, The emphasis of antifriction and wear resistant composite plating always research.
The second phase particles that traditional composite deposition technology is selected is micro-size particles mostly, and grain graininess is relatively big, in plating Suspending power in liquid is very poor so that the particle content in coating is low, skewness and coating surface coarse, coating easily from In substrate peel off, this development that have impact on this technology to a certain extent and application, and nanoparticle appear as conventional composite Deposition technique brings new opportunity.Research finds, nanoparticle is applied to the nanometer obtained in composite deposition technology multiple Close coating, than common composite deposite, there is higher hardness, wearability, antifriction quality.Prepare at present that wear-resistant composite deposite commonly uses the Two-phase nanoparticle has SiC, WC, Al2O3、SiO2And Nano diamond (ND) etc., wherein, Composite coatings with nanodiamond, because of it Distinctive character enjoys favor in composite deposition technology.
The states such as home and abroad is carried out the research of Nano diamond composite electrodeposition technique and started from the nineties in last century, Russia are first The research in composite deposite field of the rear beginning Nano diamond.China also has many units to be engaged in the R&D work of this respect.In The Wang Liping of academy of science of state Lanzhou Chemical Physics institute, that the Luan Xinwei et al. of University On The Mountain Of Swallows have studied nickel/Nano diamond is multiple Close structure and frictional behaviour, Beijing Electromechanical Research Inst's Tong Xiao brightness, Tsing-Hua University poplar Ilicis Purpureae, University Of Qingdao's application technology of coating Institute thanks big waves and Changsha Mining & Metallurgy Inst Wang Bai spring et al. and have studied the frictional behaviour of chromium/Composite coatings with nanodiamond, Go out is consistent it is concluded that Composite coatings with nanodiamond has good frictional behaviour, has good application prospect.
The blade of China's part steam turbine and refrigeration compressor uses aluminum alloy surface nickel-phosphor-Diamond compound electroless plating Layer technology, but this coating is very poor with ground bond strength, the product of current domestic use is by Japan's import.So, carry out The basic research of diamond composite deposition technology is of great immediate significance and using value, can be that actively preparation has height Intensity composite deposite provides organization design principle and theoretical basis.
Summary of the invention
The technical problem to be solved is, overcomes the deficiencies in the prior art, it is provided that a kind of with pulse electricity Nickel-nanodiamond wear-resisting strengthening composite coating method is prepared in source.
Nickel-nanodiamond wear-resisting strengthening composite coating method prepared by the present invention pulse power, enters as steps described below OK:
1. mechanical polishing: be first that 60#, 80#, 120# corundum wheel polishes sample surfaces by granularity, then with granularity be 240#, The sea emery wheel of 400#, 600#, is polished sample surfaces successively, after polishing sample surfaces roughness Ra in 0.071 μm～ Between 0.050 μm；Then clean with distilled water, dry up sample with cold wind；
2. electrochemical deoiling: the container placing degreasing fluid is placed in water bath with thermostatic control, under the conditions of 70 DEG C, sample is placed on and removes Oil removing 2min in fluid, then the distilled water of the sample after oil removing is cleaned, and dries up with cold wind；The component of electrochemical deoiling liquid and content As follows: NaOH 65g/L, Na2CO3 17.5g/L、Na3PO4·12H2O 17.5g/L、Na2SiO3·9H2O 5g/L, solvent is Water；
3. electrochemical degreasing: Q235A is negative electrode, and platinum titanium net is anode, is placed in the container holding electrochemical degreasing liquid, DC current is 0.2A, and the container holding electrochemical degreasing liquid is placed in the water bath with thermostatic control that temperature is 70 DEG C, oil removing 1min, so Sample distilled water after rear oil removing is cleaned；Component and the content of electrochemical degreasing liquid are as follows: NaOH 15g/L, Na2CO3 55g/ L、Na3PO4·12H2O 35g/L、Na2SiO3·9H2O 7.5g/L, solvent is water；
4. plating: Nano diamond mean particle size is 15nm, is made into the Nano diamond that mass percent is 20% Aqueous solution；First Nano diamond aqueous solution is placed on ultrasonic disperse one hour in ultrasonic washing unit before plating, is subsequently adding In plating solution, in plating solution, diamond concentration is 8g/L, under the conditions of mixing speed 10r/min, carries out composite electrodeposition；Use SMD-10 Type numerical control dual-pulse power supply, output current wave is square wave, and output frequency is 5-5000HZ, dutycycle is 0-100%, maximum defeated Going out peak point current is 10A；Electro-deposition process parameter is 45 DEG C, pH=4, electric current density are 2A/dm2, electroplating time is 1h；Plating After end, sample taking-up distilled water is cleaned surface, then dry up with cold wind；Composition and the content of plating solution are as follows: NiSO4·6H2O 240g/L, NiCl2·6H2O 20g/L, H3BO320g/L, Nano diamond 8g/L.
The compound method of described plating solution, is carried out as steps described below:
A. in the beaker of 1L, add 470mL distilled water, be heated to 50 DEG C in being placed on water bath with thermostatic control, by load weighted NiSO4·6H2O、NiCl2·6H2O is added sequentially in beaker, and stirring is to dissolving；
B. in the beaker of 250mL, add 200mL distilled water, be heated to 90 DEG C in being placed on water bath with thermostatic control, by H3BO3Put into In beaker so that it is dissolve；
C. after the medicine in beaker all dissolves, by H3BO3Solution and NiSO4·6H2O、NiCl2·6H2The mixing of O is molten Liquid mixes；
D., after being cooled to room temperature, solution is moved in the volumetric flask of 1L, constant volume, labelled stand-by；
When e. using, concentration is the H of 10%2SO4Solution or 10% NaOH solution pH value is adjusted to 4；
F. according to required concentration, diamond is added in plating solution.
Compared with prior art, the invention has the beneficial effects as follows:
DC electrodeposition under consistency and elasticity modular ratio the same terms of composite deposite prepared by employing dipulse coating The composite deposite consistency and elasticity modulus of preparation wants height, and when positive pulse is 50ms, the consistency and elasticity modulus of composite deposite reaches 5.23GPa and 197.38GPa, surface roughness value Ra are 0.792 μm.
Accompanying drawing explanation
Fig. 1 is nickel plating apparatus schematic diagram；
Fig. 2 XRD spectra；
The surface topography of Fig. 3 (a) direct current electrode position coating, composite deposite surface topography OLYMPUS image (× 1000)；
The surface topography of Fig. 3 (b) double-pulse plating coating, composite deposite surface topography OLYMPUS image (× 1000)；
Fig. 4 (a) is the test result direct impulse working time 50ms of dipulse electrodeposition cladding surface roughness Ra；
Fig. 4 (b) is the test result direct impulse working time 100ms of dipulse electrodeposition cladding surface roughness Ra；
When Fig. 5 (a) show DC electrodeposition mode, the surface roughness Ra test result of composite deposite；
When Fig. 5 (b) show pulse electrodeposition mode, the surface roughness Ra test knot of composite deposite.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that described herein Specific embodiment only in order to explain the present invention, be not intended to limit the present invention.
Carry out as steps described below:
1. mechanical polishing: be first that 60#, 80#, 120# corundum wheel polishes sample surfaces by granularity, then with granularity be 240#, The sea emery wheel of 400#, 600#, is polished sample surfaces successively, after polishing sample surfaces roughness Ra in 0.071 μm～ Between 0.050 μm；Then clean with distilled water, dry up sample with cold wind；
2. electrochemical deoiling: the container placing degreasing fluid is placed in water bath with thermostatic control, under the conditions of 70 DEG C, sample is placed on and removes Oil removing 2min in fluid, then the distilled water of the sample after oil removing is cleaned, and dries up with cold wind；The component of electrochemical deoiling liquid and content As follows: NaOH 65g/L, Na2CO3 17.5g/L、Na3PO4·12H2O 17.5g/L、Na2SiO3·9H2O 5g/L, solvent is Water；
3. electrochemical degreasing: Q235A is negative electrode, and platinum titanium net is anode, is placed in the container holding electrochemical degreasing liquid, DC current is 0.2A, and the container holding electrochemical degreasing liquid is placed in the water bath with thermostatic control that temperature is 70 DEG C, oil removing 1min, so Sample distilled water after rear oil removing is cleaned；Component and the content of electrochemical degreasing liquid are as follows: NaOH 15g/L, Na2CO3 55g/ L、Na3PO4·12H2O 35g/L、Na2SiO3·9H2O 7.5g/L, solvent is water；
4. plating: Nano diamond mean particle size is 15nm, is made into the Nano diamond that mass percent is 20% Aqueous solution；First Nano diamond aqueous solution is placed on ultrasonic disperse one hour in ultrasonic washing unit before plating, is subsequently adding In plating solution, in plating solution, diamond concentration is 8g/L, under the conditions of mixing speed 10r/min, carries out composite electrodeposition；Fig. 1 is nickel plating Device schematic diagram, uses SMD-10 type numerical control dual-pulse power supply, and output current wave is square wave, and output frequency is 5-5000HZ, Dutycycle is 0-100%, and maximum output peak point current is 10A；Electro-deposition process parameter is 45 DEG C, pH=4, electric current density are 2A/dm2, electroplating time is 1h；Sample taking-up distilled water is cleaned surface after terminating by plating, then dries up with cold wind；Described plating Composition and the content of liquid are as follows: NiSO4·6H2O 240g/L, NiCl2·6H2O20g/L, H3BO320g/L, Nano diamond 8g/L；
Using SMD-10 type numerical control dual-pulse power supply, output current wave is square wave, and output frequency is 5-5000HZ, duty Ratio is 0-100%, and maximum output peak point current is 10A.There are some researches show that increasing pulsewidth can play the purpose of crystallization of refinement.This Experiment changes the direct impulse working time, carries out double-pulse plating.Dipulse electro-deposition process parameter is shown in Table 1.
Table 1 dipulse electro-deposition process parameter
(1) compound method of plating solution
A. in the beaker of 1L, add 470mL distilled water, be heated to 50 DEG C in being placed on water bath with thermostatic control, be 168g's by quality NiSO4·6H2The NiCl of O, 14g2·6H2O is added sequentially in beaker, and stirring is to dissolving；
B. in the beaker of 250mL, add 200mL distilled water, be heated to 90 DEG C in being placed on water bath with thermostatic control, be 14g by quality H3BO3Put in beaker so that it is dissolve；
C. after the medicine in beaker all dissolves, by H3BO3Solution and NiSO4·6H2O、NiCl2·6H2The mixing of O is molten Liquid mixes；
D., after being cooled to room temperature, solution is moved in the volumetric flask of 1L, constant volume, labelled stand-by；
When e. using, concentration is the H of 10%2SO4Solution or 10% NaOH solution pH value is adjusted to 4；
F. according to required concentration, 28mL Nano diamond solution is added in above-mentioned plating solution.
(2) measurement to coating
With D/MAX-2500 type X-ray diffractometer, coating being carried out material phase analysis, test condition is copper target, and pipe pressure is 40Kv scanning speed is 8 °/min, and 2 θ angles are 40-100 °.In the XRD spectra 2 that composite deposite is corresponding, original Q235 base steel Body is in 2 θ=64.68, and the diffraction maximum corresponding at 82.05,98.63 disappears, and in 2 θ=44.4,51.8,76.22,92.9, Occur in that multiple new diffraction maximum at 98.4, find after the position of these diffraction maximums and standard x RD spectrogram are analyzed, These peaks correspond respectively to Ni (PDF-#65-2865) and the diffraction maximum of diamond C (PDF-#75-0410), and this result shows In the plating solution that diamond concentration is different, DC electrodeposition gained coating all contains Ni and C element, i.e. diamond to be successfully combined Enter nickel coating.
In order to study the impact on coating surface morphology of the electro-deposition mode, under conditions of other technological parameters are identical, change Power transformation depositional mode, uses the surface topography contrast of dipulse electro-deposition mode and DC electrodeposition, wherein, dipulse forward work It is 50ms and 100ms as the time.Result shows: the coating that coating surface prepared by dipulse electro-deposition is prepared than DC electrodeposition More even compact.Fig. 3 is the surface topography of different electro-deposition mode coating, and Olympus OLYMPUS STM6 is micro-in measurement Mirror.As can be observed from Figure: prepare coating with DC electrodeposition and compare, the nickel-nanodiamond Composite Coatings that prepared by dipulse The crystal grain of layer is tiny, surface more smooth.Because during pulse electrodeposition, the formation of new nucleus is occupied an leading position and nucleus Growth accounts for backseat, so the sedimentary formed has more even curface.The coating prepared with dipulse electro-deposition exists When forward operating current is 50ms, coating is more smooth, and crystal grain is thinner.
Coating surface roughness Ra is measured with 2302A type synthesis measuring profilometer.Measurement parameter is: sample length is 2.5mm, evaluates a length of 12.5mm, and driving box sliding speed is 0.5mm/s.
Fig. 4 is the test result of dipulse electrodeposition cladding surface roughness Ra, wherein, and direct impulse work shown in Fig. 4 (a) Making the surface roughness Ra value of coating during time 50ms less, coating surface is more smooth.During the work of direct impulse shown in Fig. 4 (b) Between 100ms time coating surface roughness.
When Fig. 5 show employing different electro-deposition mode, the surface roughness Ra test result of composite deposite, can see Go out: relative to DC electrodeposition, the composite deposite surface roughness Ra value using pulse electrodeposition to obtain is less.
By the hardness of the Nano Indenter XP type nanometer mechanics test system and test coating equipped with diamond penetrator and Elastic modelling quantity.Test parameters: loading speed and rate of debarkation are 40nm/s, compression distance is 2000nm, presses depths in maximum Persistent pressure 10s.Owing to thickness of coating is about 20 μm, compression distance is the 10% of thickness of coating.Composite deposite hardness and bullet Property modulus is shown in Table 2.
The consistency and elasticity modulus of the different electro-deposition mode composite deposite of table 2
Conclusion: consistency and elasticity modular ratio the same terms of nickel-nanodiamond composite deposite prepared by employing dipulse Under the coating hardness prepared of DC electrodeposition and elastic modelling quantity want height, the consistency and elasticity modulus of coating when positive pulse is 50ms Reaching 5.23GPa and 197.38GPa, surface roughness value Ra is 0.792 μm.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art For art personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications Also should be regarded as protection scope of the present invention.

Claims (3)

1. prepare a nickel-nanodiamond wear-resisting strengthening composite coating method with the pulse power, it is characterized in that, according to following step Suddenly carry out:
(1) mechanical polishing: first polish sample surfaces with three kinds of varigrained corundum wheels, then with three kinds of varigrained seas Emery wheel, is polished sample surfaces successively, and after polishing, sample surfaces roughness Ra is between 0.071 μm-0.050 μm；Then Clean with distilled water, dry up sample with cold wind；
(2) electrochemical deoiling: the container placing degreasing fluid is placed in water bath with thermostatic control, under the conditions of 70 DEG C, sample is placed on degreasing fluid Middle oil removing 2min, then the distilled water of the sample after oil removing is cleaned, and dries up with cold wind；The component of electrochemical deoiling liquid and content are such as Under: NaOH 65g/L, Na2CO3 17.5g/L、Na3PO4·12H2O17.5g/L、Na2SiO3·9H2O 5g/L, solvent is water；
(3) electrochemical degreasing: Q235A is negative electrode, and platinum titanium net is anode, is placed in the container holding electrochemical degreasing liquid, directly Stream electric current is 0.2A, and the container holding electrochemical degreasing liquid is placed in the water bath with thermostatic control that temperature is 70 DEG C, oil removing 1min, then Sample after oil removing distilled water is cleaned；Component and the content of electrochemical degreasing liquid are as follows: NaOH 15g/L, Na2CO3 55g/L、 Na3PO4·12H2O 35g/L、Na2SiO3·9H2O 7.5g/L, solvent is water；
(4) plating: Nano diamond mean particle size is 15nm, is made into the Nano diamond that mass percent is 20% water-soluble Liquid；First Nano diamond aqueous solution is placed on ultrasonic disperse one hour in ultrasonic washing unit before plating, is subsequently adding plating solution In, in plating solution, diamond concentration is 8g/L, under the conditions of mixing speed 10r/min, carries out composite electrodeposition；Use SMD-10 type number Control dual-pulse power supply, output current wave is square wave, and output frequency is 5-5000HZ, dutycycle is 0-100%, maximum output peak Value electric current is 10A；Electro-deposition process parameter is 45 DEG C, pH=4, electric current density are 2A/dm2, electroplating time is 1h；Plating terminates After sample taking-up distilled water is cleaned surface, then dry up with cold wind；Composition and the content of plating solution are as follows: NiSO4·6H2O 240g/L, NiCl2·6H2O 20g/L, H3BO320g/L, Nano diamond 8g/L.
Nickel-nanodiamond wear-resisting strengthening composite coating method prepared by the pulse power the most according to claim 1, and it is special Levy and be, the compound method of plating solution in described step (4), carry out as steps described below:
A. in the beaker of 1L, add 470mL distilled water, be heated to 50 DEG C in being placed on water bath with thermostatic control, be 168g's by quality NiSO4·6H2The NiCl of O, 14g2·6H2O is added sequentially in beaker, and stirring is to dissolving；
B. in the beaker of 250mL, add 200mL distilled water, be heated to 90 DEG C in being placed on water bath with thermostatic control, by the H of 14g3BO3Put into In beaker so that it is dissolve；
C. after the medicine in beaker all dissolves, by H3BO3Solution and NiSO4·6H2O、NiCl2·6H2The mixed solution of O mixes It is combined；
D., after being cooled to room temperature, solution is moved in the volumetric flask of 1L, constant volume, labelled stand-by；
When e. using, concentration is the H of 10%2SO4Solution or 10% NaOH solution pH value is adjusted to 4；
F. according to required concentration, 28mL Nano diamond solution is added in above-mentioned plating solution.
Nickel-nanodiamond wear-resisting strengthening composite coating method prepared by the pulse power the most according to claim 1, and it is special Levy and be, in described step (1), first polish sample surfaces with granularity 60#, 80#, 120# corundum wheel, then with granularity be 240#, Sample surfaces is polished by the sea emery wheel of 400#, 600#.
CN201610769607.5A 2016-08-30 2016-08-30 Nickel Nano diamond wear-resisting strengthening composite coating method is prepared with the pulse power Pending CN106119909A (en)

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CN107326405A (en) * 2017-06-23 2017-11-07 安庆市枞江汽车部件制造有限公司 A kind of electroplating surface processing technology of car belt buckle
CN110724983A (en) * 2019-10-12 2020-01-24 天津大学 Method for preparing nano-copper-coated tungsten carbide core-shell structure powder by pulse electrodeposition
CN112144082A (en) * 2019-06-27 2020-12-29 天津乾宇超硬科技股份有限公司 Process for preparing high-hardness nickel-nano diamond composite coating
CN114525568A (en) * 2022-02-21 2022-05-24 重庆大学 Cr-modified nano diamond wear-resistant coating

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Application publication date: 20161116