CN106757229A - A kind of electro-plating method - Google Patents
A kind of electro-plating method Download PDFInfo
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- CN106757229A CN106757229A CN201611099579.7A CN201611099579A CN106757229A CN 106757229 A CN106757229 A CN 106757229A CN 201611099579 A CN201611099579 A CN 201611099579A CN 106757229 A CN106757229 A CN 106757229A
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
- C25D5/022—Electroplating of selected surface areas using masking means
-
- 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
-
- 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
- C25D5/48—After-treatment of electroplated surfaces
Abstract
The invention discloses a kind of electro-plating method, belong to electroplating technology field.The electro-plating method includes pre-processing the surface of part to be plated,Layers of chrome is formed in piece surface to be plated,Part to be plated to being formed with layers of chrome carries out dehydrogenation,First area is processed,Surface activation process is carried out to first area,In second area covering protection film,Zinc layers are formed on the first region,Part to be plated to being formed with zinc layers carries out dehydrogenation,So that there is corrosion resistance higher the first area of part to be plated,Second area has wearability higher,Solve the problems, such as that different parts are different with the requirement of corrosion is delayed for wearability,Dehydrogenation twice,The hydrogen content in layers of chrome and zinc layers can be reduced,Avoid Hydrogen Brittleness Phenomena,Preceding surface active is carried out to first area zinc-plated,The oxide on chromium top layer can be removed,Be conducive to improving the adhesion of zinc layers and layers of chrome,Avoid producing space between zinc layers and layers of chrome,Zinc layers are avoided to be peeled off from layers of chrome.
Description
Technical field
The present invention relates to electroplating technology field, more particularly to a kind of electro-plating method.
Background technology
Plating is a kind of metal surface treating method, according to plating material difference, can reach avoid corrosion of metal,
Improve wearability, the purpose such as make material more attractive.
Chromium plating and it is zinc-plated be two kinds of relatively common electroplating technologies, can improve the resistance to of steel by alphatization
Mill property, while steel corrosion can also be delayed, it is zinc-plated preferably to delay corrosion compared to chromium plating.
The need for the surface of many machine components carries out just meeting use after zinc-plated or chromium plating, but there is part zero
Part, different position is to wearability and delays the performances such as corrosion to have different demands, such as support of the carbon steel material in pulley
Axle, when being electroplated, the two ends of support shaft are main to delay based on corrosion, and support shaft middle part is mainly then to improve wearability
It is main, therefore support shaft is fully met performance requirement using simple zinc-plated or chromium plating.
The content of the invention
In order to solve the problems, such as that different parts are different with the requirement of corrosion is delayed for wearability in support shaft, the present invention is real
Example is applied there is provided a kind of electro-plating method.The technical scheme is as follows：
A kind of electro-plating method, the electro-plating method includes：
Surface to part to be plated pre-processes；
First electroplated electrode and the part to be plated are immersed in the coating bath for filling plating chromic electrolyte, with the part to be plated
It is negative electrode, the first electroplated electrode is anode, and layers of chrome is formed in the piece surface to be plated；
Part described to be plated to being formed with the layers of chrome carries out dehydrogenation；
First area is processed, to reduce the surface roughness of the first area, the first area is described
Zinc-plated region is needed in layers of chrome；
Surface activation process is carried out to the first area；
In second area covering protection film, the second area is the area in addition to the first area in the layers of chrome
Domain；
Second electroplated electrode and the part to be plated are immersed in the coating bath for filling zinc plating electrolyte, with the part to be plated
It is negative electrode, second electroplated electrode is anode, and zinc layers are formed on the first area；
Part described to be plated to being formed with the zinc layers carries out dehydrogenation.
Preferably, the surface to part to be plated pre-processes, including：
Surface to the part to be plated carries out oil removing；
Part to be plated described in etch.
Preferably, the surface to part to be plated pre-processes, and also includes：
Anode treatment is carried out to the part to be plated.
Further, the temperature of the anode treatment is 53~55 DEG C, and the time of the anode treatment is 50~70s, institute
The anodic current density for stating anode treatment is 30~35A/dm2。
Preferably, it is described that the first area is processed, to reduce the surface roughness of the first area, bag
Include：
Grinding is carried out to the first area, the surface roughness Ra for making the first area is 0.2~0.4.
Alternatively, it is described to carry out surface activation process to the first area, including：
Smeared using acid solution and wash the first area, to remove the oxide-film at the first area.
Preferably, it is formed with after the part described to be plated of the zinc layers carries out dehydrogenation at described Dui, the plating
Method also includes：
Light extraction treatment is carried out to the zinc layers using nitric acid.
Further, it is formed with after the part described to be plated of the zinc layers carries out dehydrogenation at described Dui, the electricity
Electroplating method also includes：
Treatment is passivated to the zinc layers using passivating solution.
Alternatively, the cathode-current density when the piece surface to be plated forms layers of chrome is 30~35A/dm2。
Alternatively, the cathode-current density on the first area during formation zinc layers is 1~2A/dm2。
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：Located in advance by carrying out surface to part to be plated
After reason and anode treatment, one layer of chromium first is plated in piece surface to be plated, then in second area covering protection film, in first area plating
Zinc, so that there is corrosion resistance higher the first area of part to be plated, second area has wearability higher, solution
Different parts of the having determined problem different with the requirement of corrosion is delayed for wearability.By carrying out dehydrogenation twice, can drop
Hydrogen content in low layers of chrome and zinc layers, it is to avoid Hydrogen Brittleness Phenomena occurs, is processed by the zinc-plated preceding surface to layers of chrome, can be with
The surface roughness of first area is reduced, the adhesion between zinc layers and layers of chrome is improved, by before zinc-plated, entering to first area
Row surface activation process, can remove the sull on chromium top layer, be conducive to further improving the knot between zinc layers and layers of chrome
With joint efforts, it is to avoid space is produced between zinc layers and layers of chrome, it is to avoid zinc layers are peeled off from layers of chrome.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of flow chart of electro-plating method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of pulley support axle provided in an embodiment of the present invention；
Fig. 3 is the flow chart of another electro-plating method provided in an embodiment of the present invention；
Fig. 4 is the state diagram after a kind of pulley support axle chromium plating provided in an embodiment of the present invention；
Fig. 5 be a kind of pulley support axle provided in an embodiment of the present invention it is zinc-plated after state diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of flow chart of electro-plating method provided in an embodiment of the present invention, as shown in figure 1, the method includes：
S11：Surface to part to be plated pre-processes.
The part to be plated can be carbon steel part.
S12：Part to be plated and the first electroplated electrode are immersed in the coating bath for filling plating chromic electrolyte, is cloudy with part to be plated
Pole, the first electroplated electrode is anode, and layers of chrome is formed in piece surface to be plated.
S13：Part to be plated to being formed with layers of chrome carries out dehydrogenation.
S14：First area is processed, to reduce the surface roughness of first area, first area is to be needed in layers of chrome
Want zinc-plated region.
S15：Surface activation process is carried out to first area.
S16：In second area covering protection film, second area is the region in addition to first area in layers of chrome.
S17：Second electroplated electrode and part to be plated are immersed in the coating bath for filling zinc plating electrolyte, is cloudy with part to be plated
Pole, the second electroplated electrode is anode, and zinc layers are formed on the first region.
S18：Part to be plated to being formed with zinc layers carries out dehydrogenation.
The embodiment of the present invention is first in piece surface to be plated after surface preparation and anode treatment are carried out to part to be plated
One layer of chromium of plating, then in second area covering protection film, it is zinc-plated in first area, so that the first area of part to be plated
There is corrosion resistance higher, second area has wearability higher, solve different parts for wearability and delay corrosion
The different problem of requirement, by carrying out dehydrogenation twice, the hydrogen content in layers of chrome and zinc layers can be reduced, it is to avoid hydrogen occurs
Crisp phenomenon, is processed by the zinc-plated preceding surface to layers of chrome, can reduce the surface roughness of first area, improves zinc layers
Adhesion between layers of chrome, by before zinc-plated, surface activation process being carried out to first area, can remove the oxygen on chromium top layer
Compound film, is conducive to further improving the adhesion between zinc layers and layers of chrome, it is to avoid produce space between zinc layers and layers of chrome, keep away
Exempt from zinc layers to be peeled off from layers of chrome.
Electro-plating method provided in an embodiment of the present invention is illustrated as a example by being electroplated to pulley support axle below.Need
Illustrate, electro-plating method provided in an embodiment of the present invention is applicable not only to pulley support axle, apply also for other different parts
To wearability and the performances such as corrosion are delayed to have the part of different demands.
Fig. 2 is a kind of structural representation of pulley support axle provided in an embodiment of the present invention, as shown in Fig. 2 pulley support
Axle 10 includes that the installation portion 10a and supporting part 10b positioned at installation portion 10a two ends, supporting part 10b are used to be supported on pulley bracket
On, pulley sleeve is mounted in installation portion 10a.
Fig. 3 is the flow chart of another electro-plating method provided in an embodiment of the present invention, as shown in figure 3, the method includes：
S211：Surface to part to be plated carries out oil removing.
Specifically, degreaser oil removing can be used.
Further, degreaser is held in degreasing tank, part to be plated is immersed in degreaser, by rag to be plated
The surface of part smear washing.
Preferably, control the temperature of degreaser for 70~80 DEG C, degreaser can faster by be plated zero at such a temperature
The greasy dirt dissolving on part surface.
After carrying out smearing for 3~5 times to part to be plated and washing, 3 are carried out to piece surface to be plated by 70~100 DEG C of hot water~
5 cleanings, to ensure to be washed away using the spot produced by degreaser oil removing, then are cleaned, to be plated by 3~5 normal-temperature waters
Whether part is lowered the temperature, and observe in water and also have oil stain to produce.Piece surface to be plated forms uniform water after normal temperature is washed
During film, cleaning can be stopped.
S212：Etch part to be plated.
The oxide-film of piece surface to be plated can be removed by etch.
When realizing, part to be plated can be immersed in etch solution.
Alternatively, etch solution can be the mixed solution of hydrochloric acid and sulfuric acid.
When realizing, it is that commercially pure hydrochloric acid solution and commercially pure sulfuric acid solution are mixed that etch solution can use pureness specifications
Conjunction is formed.
Further, commercially pure 70~100mL of hydrochloric acid solution, commercially pure sulfuric acid solution are mixed with every 1L etch solution
100~135mL.
Preferably, the etch time can be 10~20s, and etch overlong time can cause the surface of part to be plated serious
Corrosion, the etch time is too short, then the oxide-film of piece surface to be plated may not removed completely.
Specifically, the true qualities that metal can be exposed to piece surface to be plated with etch, can be using etch and water repeatedly
Wash, to observe the color of piece surface to be plated.
Further, when completing the laggard water-filling of etch and washing, it is 6~8 that should clean the pH to the water of piece surface, to ensure
The etch solution of piece surface is fully washed away.
S213：Anode treatment is carried out to part to be plated.
Specifically, can by part to be plated immerse coating bath in, with part to be plated as anode, the first electroplated electrode as negative electrode,
Connect direct current.Being processed by anode can cause that piece surface to be plated is more smooth, be conducive to improving chromium plating quality.
Alternatively, the temperature of anode treatment can be 53~55 DEG C, and the time of anode treatment can be 50~70s, anode
The anodic current density for the treatment of can be 30~35A/dm2。
When realizing, carried out in the coating bath that the first electroplated electrode and part to be plated immersion can be filled directly plating chromic electrolyte
Anode treatment, after anode treatment is completed, follow-up chromium plating is carried out by only need to changing galvanic direction so that operation is more
Simply.
S22：In piece surface chromium plating to be plated.
Specifically, the first electroplated electrode and part to be plated are immersed in the coating bath for filling plating chromic electrolyte, with part to be plated
It is negative electrode, the first electroplated electrode is anode, and layers of chrome is formed in piece surface to be plated.
Wherein, the first electroplated electrode can be lead-antimony alloy electrode.
Fig. 4 is the state diagram after a kind of pulley support axle chromium plating provided in an embodiment of the present invention, as shown in figure 4, pulley branch
Layers of chrome 11 is formed with the surface for supportting axle 10.
Alternatively, the cathode-current density in piece surface chromium plating to be plated is 30~35A/dm2, the chromium plating time can be with root
Thickness according to required layers of chrome determines, if cathode-current density is too low, is likely to occur thickness of coating inequality, local plating leakage
Situation, if cathode-current density is too high, is likely to occur the coarse situation of coating surface.
When realizing, the main component of plating chromic electrolyte is chromic anhydride, sulfuric acid, trivalent chromium, iron, and plating chromic electrolyte can use pure
Metric lattice are commercially pure chromic anhydride, and pureness specifications are that the pure sulfuric acid solution of chemistry is formulated.
Further, in plating chromic electrolyte, the content of pure chromic anhydride is 180~220g/L, the content of pure sulfuric acid
It is 1.8~2.2g/L, wherein, the content of pure chromic anhydride is 80~100 times of the content of pure sulfuric acid, additionally, the plating per 1L
In chromium electrolyte, also contain the fe that the trivalent chromium and quality that quality is 2~4g are 0~5g.
S23：Part to be plated to being formed with layers of chrome carries out dehydrogenation.
Dehydrogenation can remove the hydrogen atom penetrated into chromium plating in plating, it is to avoid Hydrogen Brittleness Phenomena, Hydrogen Brittleness Phenomena occur
It refer to the Microamounts of Hydrogen entered inside steel in the smelting process of material and the manufacture and assembly process (such as plating, welding) of part
Internally phenomenon that is remaining or causing material embrittlement even to ftracture under additional stress.
Specifically, by chromium plating after part to be plated insert except hydrogen storage equipment, stand 8~10 hours under atmospheric pressure environment.
When realizing, except hydrogen storage equipment can be baking oven or stove, except the temperature in hydrogen storage equipment can be 190~220 DEG C.
Preferably, dehydrogenation is carried out in 1h after chromium plating, if time interval is too long, the effect of dehydrogenation can be reduced so that
Cannot elimination of hydrogen embrittlement.
S24：Grinding is carried out to first area.
The burr in layers of chrome can be removed by grinding, the surface roughness of layers of chrome is reduced, is conducive in layers of chrome
Carry out zinc-plated.
As shown in figure 4, in the present embodiment, first area refers to the table of the layers of chrome 11 on the supporting part 10b of pulley support axle 10
Face.
Preferably, after part is cooled to room temperature, grinding is carried out to first area, makes the rough surface of first area
Degree Ra is 0.2~0.4, and the too high adhesion that can be reduced between zinc layers and layers of chrome of surface roughness Ra is easily peeled off zinc layers, table
Surface roughness Ra is too low, can increase the difficulty of grinding, increases processing cost.
S25：Surface to part to be plated carries out oil removing again.
After chromium plating is completed, the surface of part to be plated may again be infected with greasy dirt, it is therefore desirable to oil removing again.
Step S25 is optional step, and detailed process is referred to step S211, no longer describes in detail herein.
S26：Surface activation process is carried out to first area.
The sull of the chromium formed on first area can be removed by surface activation process, is conducive to strengthening zinc layers
With the adhesion of layers of chrome.
Specifically, smeared using acid solution and wash first area, to remove the oxide-film at first area.
When realizing, acid solution can use pureness specifications to be formulated for the pure sulfuric acid solution of chemistry.
Further, in the acid solution for preparing, the mass fraction of sulfuric acid can be 5~10%, and sulfuric acid concentration is too low then
Can increase and smear the time of washing, concentration is excessive may to cause larger corrosion to layers of chrome.
Preferably, can carry out 3~4 times to first area and smear to wash by being soaked with the rag of sulfuric acid solution, to ensure oxidation
Thing film is removed.
S27：In second area covering protection film.
As shown in figure 4, in the present embodiment, second area refers to the table of the layers of chrome 11 on the installation portion 10a of pulley support axle 10
Face.
In order to avoid plating zinc in second area, it is therefore desirable in second area covering protection film.
When realizing, diaphragm can be plastic sheeting, and plastic sheeting can prevent the corrosion of zinc plating electrolyte, and be easy to cover
Lid.
S28：It is zinc-plated on the first region.
Specifically, the second electroplated electrode and part to be plated are immersed in the coating bath for filling zinc plating electrolyte, with part to be plated
It is negative electrode, the second electroplated electrode is anode, and zinc layers are formed on the first region.
Wherein, the second electroplated electrode can be zinc electrode.
Fig. 5 be a kind of pulley support axle provided in an embodiment of the present invention it is zinc-plated after state diagram, as shown in figure 5, pulley branch
Layers of chrome 11 is formed with the surface for supportting axle 10, zinc layers 12 are formed with the surface of layers of chrome 11 at supporting part 10b.
Alternatively, cathode-current density when forming zinc layers on the first region is 1~2A/dm2, the zinc-plated time can be with root
Thickness according to required zinc layers determines.
Alternatively, the main component of zinc plating electrolyte be zinc oxide, NaOH, zinc-plating additive, wherein, zinc-plated addition
Agent includes WB alkaline zinc platings additive and the alkaline zinc plating additives of DPE- III.
Wherein, the pureness specifications of zinc oxide can be pure for chemistry, and the pureness specifications of NaOH can be pure for chemistry.
Specifically, in zinc plating electrolyte, the content of pure zinc oxide can be 10~12g/L, pure NaOH
Content can be 100~120g/L, additionally, in per 1L zinc plating electrolytes, being also added with the WB alkaline zinc platings addition of 4~6mL
The alkaline zinc plating additives of DPE- III of agent and 4~6mL.
S29：Part to be plated to being formed with zinc layers carries out dehydrogenation.
Detailed process is referred to step S23, no longer describes in detail herein.
S30：Light extraction treatment is carried out to zinc layers using nitric acid.
Light extraction treatment refers to so that coating is brighter, to pass through after coating is formed by the top layer of chemical reagent removal coating
Light extraction treatment can remove the small burr on zinc layers surface, so that zinc layers are more smooth bright.
Can be that light extraction treatment is carried out to zinc layers after the pure nitric acid of chemistry dilutes by pureness specifications when realizing.
Further, in the salpeter solution after dilution, the mass fraction of nitric acid can be 4~6g/L, the quality point of nitric acid
Counted conference and caused zinc layers by excessive corrosion, concentration is too small can not completely to remove flash removed so that zinc layers surface roughness is excessive.
Specifically, can will be zinc-plated after part insert 3~5s in salpeter solution, overlong time can cause zinc layers excessive
Corrosion, the time is too short can not completely to remove flash removed so that zinc layers surface roughness is excessive, reduce the lustrous surface of zinc layers, influence
It is attractive in appearance.
S31：Zinc layers are passivated with treatment using passivating solution.
The corrosion of zinc layers, guard time of the extension to part can be slowed down by passivation.
Specifically, part is passivated in passivating dip first, then part is bleached in liquid lime chloride, passed through
Liquid lime chloride can remove the color formed in passivating process.
Alternatively, the main component of passivating dip is chromic anhydride, sulfuric acid, nitric acid.
When realizing, passivating dip can use pureness specifications for commercially pure chromic anhydride, pureness specifications be the pure sulfuric acid of chemistry,
Pureness specifications are that the pure nitric acid of chemistry is formulated.
Further, in passivating dip, the content of pure chromic anhydride is 150~180g/L, and the content of pure sulfuric acid is 5
~10g/L, the content of pure nitric acid is 10~15g/L.
Alternatively, the main component of liquid lime chloride is chromic anhydride, chromium chloride, sodium fluoride, nitric acid, sulfuric acid, hydrochloric acid.
When realizing, it is the pure fluorination of chemistry for commercially pure chromic anhydride, pureness specifications that liquid lime chloride can use pureness specifications
Sodium, pureness specifications be the pure nitric acid of chemistry, pureness specifications be the pure hydrochloric acid of chemistry, pureness specifications be the pure sulfuric acid of chemistry prepare and
Into.
Further, in liquid lime chloride, the content of pure chromic anhydride is 2~5g/L, the content of pure sodium fluoride for 0~
2g/L, the content of pure chromium chloride is 0~2g/L, additionally, in per 1L liquid lime chlorides, being also mixed with the chemical pure of 30~50mL
Salpeter solution, the chemical pure sulfuric acid solution of 10~15mL, the chemical pure hydrochloric acid solution of 10~15mL.
When realizing, first part can be immersed in passivating dip, continue 5~10s, then part is placed in air, continued
10~15s, is then immersed in liquid lime chloride, continues 15~25s, then part is placed in air, continues 15~25s, in passivation
The time stood in solution, liquid lime chloride and air is relevant with temperature, and passivating dip, liquid lime chloride and temperature are higher, then the time
It is shorter, on the contrary it is more long, passivating dip can be heated when passivating dip temperature is less than 15 DEG C.
It should be noted that after step s 212, after step S22, after step S25, after step S26 and step
Part can be cleaned after S28, during cleaning, 3~5 can be carried out to piece surface by 70~100 DEG C of hot water
Secondary cleaning, to ensure that spot is washed away, then is cleaned by 3~5 normal-temperature waters, and part is lowered the temperature, and observe in water whether
Also spot is produced.When piece surface forms uniform moisture film after normal temperature washing, that is, represent and clean, cleaning can be stopped.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of electro-plating method, it is characterised in that the electro-plating method includes：
Surface to part to be plated pre-processes；
First electroplated electrode and the part to be plated are immersed in the coating bath for filling plating chromic electrolyte, is cloudy with the part to be plated
Pole, the first electroplated electrode is anode, and layers of chrome is formed in the piece surface to be plated；
Part described to be plated to being formed with the layers of chrome carries out dehydrogenation；
First area is processed, to reduce the surface roughness of the first area, the first area is the layers of chrome
It is upper to need zinc-plated region；
Surface activation process is carried out to the first area；
In second area covering protection film, the second area is the region in addition to the first area in the layers of chrome；
Second electroplated electrode and the part to be plated are immersed in the coating bath for filling zinc plating electrolyte, is cloudy with the part to be plated
Pole, second electroplated electrode is anode, and zinc layers are formed on the first area；
Part described to be plated to being formed with the zinc layers carries out dehydrogenation.
2. electro-plating method according to claim 1, it is characterised in that the surface to part to be plated pre-processes,
Including：
Surface to the part to be plated carries out oil removing；
Part to be plated described in etch.
3. electro-plating method according to claim 2, it is characterised in that the surface to part to be plated pre-processes,
Also include：
Anode treatment is carried out to the part to be plated.
4. electro-plating method according to claim 3, it is characterised in that the temperature of the anode treatment is 53~55 DEG C, institute
The time for stating anode treatment is 50~70s, and the anodic current density of the anode treatment is 30~35A/dm2。
5. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that described to be carried out to the first area
Processing, to reduce the surface roughness of the first area, including：
Grinding is carried out to the first area, the surface roughness Ra for making the first area is 0.2~0.4.
6. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that described to be carried out to the first area
Surface activation process, including：
Smeared using acid solution and wash the first area, to remove the oxide-film at the first area.
7. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that be formed with the zinc layers at described pair
Part described to be plated carry out dehydrogenation after, the electro-plating method also includes：
Light extraction treatment is carried out to the zinc layers using nitric acid.
8. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that be formed with the zinc layers at described pair
Part described to be plated carry out dehydrogenation after, the electro-plating method also includes：
Treatment is passivated to the zinc layers using passivating solution.
9. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that described in the piece surface to be plated
Cathode-current density when forming layers of chrome is 30~35A/dm2。
10. the electro-plating method according to any one of Claims 1 to 4, it is characterised in that the shape on the first area
It is 1~2A/dm into cathode-current density during zinc layers2。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447243A (en) * | 2017-06-19 | 2017-12-08 | 中南大学 | A kind of device being modified for the unidirectional surface of metal differential arc oxidation |
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| CN114214680A (en) * | 2022-01-07 | 2022-03-22 | 深圳市虹喜科技发展有限公司 | Silver plating process and heat-insulating container prepared by same |
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| CN107447243A (en) * | 2017-06-19 | 2017-12-08 | 中南大学 | A kind of device being modified for the unidirectional surface of metal differential arc oxidation |
| CN107447243B (en) * | 2017-06-19 | 2023-07-14 | 中南大学 | Device for metal micro-arc oxidation unidirectional surface modification |
| CN110735163A (en) * | 2019-10-15 | 2020-01-31 | 苏州胜利精密制造科技股份有限公司 | electroplating processes |
| CN114214680A (en) * | 2022-01-07 | 2022-03-22 | 深圳市虹喜科技发展有限公司 | Silver plating process and heat-insulating container prepared by same |
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