CN110484939A - A kind of hardware chromium replacement electroplating method - Google Patents
A kind of hardware chromium replacement electroplating method Download PDFInfo
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- CN110484939A CN110484939A CN201910857685.4A CN201910857685A CN110484939A CN 110484939 A CN110484939 A CN 110484939A CN 201910857685 A CN201910857685 A CN 201910857685A CN 110484939 A CN110484939 A CN 110484939A
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- Prior art keywords
- chromium
- plating
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- hardware
- processing
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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
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
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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
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
-
- 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
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
-
- 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
- C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The present invention relates to electroplating technology more particularly to a kind of hardware chromium replacement electroplating methods, comprising the following steps: completes zinc-plated processing in matrix surface；Plating zinc-nickel processing is completed in Several Thiourea Derivatives on Zinc Plate Surface；Plating is completed for chromium processing on zinc-plated nickel layer surface；Passivation Treatment is completed for layers of chrome surface in plating.Goal of the invention of the invention is to provide a kind of hardware chromium replacement electroplating method, is electroplated using technical solution provided by the invention for decorative hardware, coating surface can be made to reach traditional hexavalent chromium plating effect, bright, corrosion resistance is good, and heavy metal free, nontoxic.
Description
Technical field
The present invention relates to electroplating technology more particularly to a kind of hardware chromium replacement electroplating methods.
Technical background
Plating is exactly to plate the process of the other metal or alloy of a thin layer on certain metal surfaces using electrolysis principle, electricity
Depositing process is must to complete according to sequencing, and electroplating assembly line equipment is in order to which workpiece is sequentially placed into electroplating bath and is carried out
Plating.
In the electroplating technology of traditional sexavalence chromium plating, workpiece is completed to be electroplated after preceding processing using following steps
Processing: copper facing → nickel plating → plating Dai Ge → passivation.In above-mentioned electroplating process, cyanide can be used, increases environmental pollution, together
When that there are plating copper and nickels is at high cost, electroplating technology requires high drawback.For the high technical problem of electroplating cost, technical staff can
With using zinc-plated → plating Dai Ge → passivation technology, although product which simplifies process, but plate out will appear after placing
Decorative appearance effect is not achieved in yellowing phenomenon.
Summary of the invention
Goal of the invention of the invention is to provide a kind of hardware chromium replacement electroplating method, using technical solution provided by the invention
It is electroplated for decorative hardware, coating surface can be made to reach traditional hexavalent chromium plating effect, bright, corrosion resistance is good, and
Heavy metal free is nontoxic.
In order to reach above-mentioned technical effect, the present invention provides a kind of hardware chromium replacement electroplating method, comprising the following steps:
S100, zinc-plated processing is completed in matrix surface；
S200, plating zinc-nickel processing is completed in Several Thiourea Derivatives on Zinc Plate Surface；
S300, plating is completed for chromium processing on zinc-plated nickel layer surface；
S400, Passivation Treatment is completed for layers of chrome surface in plating.
Preferably, in the step s 100, electroplate liquid used in the zinc-plated processing includes following ratio:
KCl:250g/L；
ZnCl2: 50g/L；
Brightener NT-ZincAC260A:0.5 ∽ 2ml/L；
Walk agent NT-ZincAC260B:20 ∽ 40ml/L.
Preferably, the zinc-plated processing in step S100 includes with 2 ∽ 4A/dm2Room temperature is electroplated 25 minutes.
Preferably, in step s 200, electroplate liquid used in the plating zinc-nickel processing includes following ratio:
NaOH:120g/L；
ZnO:10g/L；
Brightener NT401A:1 ∽ 3ml/L；
Complexing agent NT401B:40 ∽ 80ml/L；
Replenishers NT401C:18 ∽ 22ml/L；
Brilliant thin agent NT401D:1 ∽ 3ml/L.
Preferably, the plating zinc-nickel processing in step S200 includes with 0.5 ∽ 4A/dm2Room temperature is electroplated 1 minute.
Preferably, in step S300, the plating includes following ratio for electroplate liquid used in chromium processing:
For chromium open cylinder agent UT-550:250 ∽ 300ml/L；
Agent UT-550:80 ∽ 120ml/L is fed for chromium.
Preferably, the plating in step S300 includes with 0.5 ∽ 1.5A/dm for chromium processing2Room temperature is electroplated 1 minute.
Preferably, after the zinc-plated processing, the zinc coat with a thickness of 10 μm of 6 ∽.
Preferably, after plating zinc-nickel processing, the zinc-plated nickel layer with a thickness of 3 μm of 2 ∽.
Preferably, after the plating is for chromium processing, the plating is for layers of chrome with a thickness of 3 μm of 2 ∽.
From the foregoing, it will be observed that making product reach the appearance of plating Cr VI, also using hardware chromium replacement electroplating method provided by the invention
The use for reducing toxic Cr VI, reduces environmental pollution, keeps worker operation convenient, and process controllability greatly improves, from
And reduce costs, fraction defective is reduced, production efficiency is improved.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the present invention will be implemented below
Attached drawing needed in the description of example or the prior art is briefly described.It should be evident that the accompanying drawings in the following description
Only a part of the embodiments of the present invention, for those of ordinary skill in the art, in not making the creative labor property
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is hardware of embodiment of the present invention chromium replacement electroplating method flow block diagram；
Fig. 2 is hardware of embodiment of the present invention chromium replacement electroplating schematic diagram of a layer structure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In electroplating technology, in order to reach the electroplating effect of Cr VI, cyanide can be used, increases environmental pollution, together
When that there are plating copper and nickels is at high cost, electroplating technology requires high drawback.For the high technical problem of electroplating cost, technical staff can
With using zinc-plated → plating Dai Ge → passivation technology, although product which simplifies process, but plate out will appear after placing
Decorative appearance effect is not achieved in yellowing phenomenon.
As shown in Figure 1, in order to solve the above-mentioned technical problem, the present embodiment provides a kind of hardware chromium replacement electroplating methods, including
Following steps:
S100, zinc-plated processing is completed in matrix surface.
In this step, electroplate liquid used in zinc-plated processing includes following ratio: KCl:250g/L；ZnCl2: 50g/L；
Brightener NT-ZincAC260A:0.5 ∽ 2ml/L；Walk agent NT-ZincAC260B:20 ∽ 40ml/L.It specifically can be by receiving this
The dedicated plating medicament AC260 production of surface treatment Co., Ltd, Thailand.
The concrete operations of zinc-plated processing are with 2 ∽ 4A/dm2 room temperature plating 25 minutes.
After completing zinc-plated processing, zinc coat can be formed on the surface of matrix, to adjust the brightness of electroplated product, increased
The corrosion resisting property of workpiece.
S200, plating zinc-nickel processing is completed in Several Thiourea Derivatives on Zinc Plate Surface.
In this step, electroplate liquid used in the processing of plating zinc-nickel includes following ratio: NaOH:120g/L；ZnO:10g/
L；Brightener NT401A:1 ∽ 3ml/L；Complexing agent NT401B:40 ∽ 80ml/L；Replenishers NT401C:18 ∽ 22ml/L；It is brilliant thin
Agent NT401D:1 ∽ 3ml/L.The dedicated plating medicament NT-401 production of Co., Ltd can be specifically surface-treated by Na Sitai.
The concrete operations for plating zinc-nickel processing are with 0.5 ∽ 4A/dm2Room temperature is electroplated 1 minute.
After completing plating zinc-nickel processing, the Several Thiourea Derivatives on Zinc Plate Surface that can be obtained in the step s 100 forms zinc-plated nickel layer, so that work
Part reaches high corrosion resistance.
S300, plating is completed for chromium processing on zinc-plated nickel layer surface.
In this step, plating includes following ratio for electroplate liquid used in chromium processing: for chromium open cylinder agent UT-550:250
∽300ml/L；Agent UT-550:80 ∽ 120ml/L is fed for chromium.Co., Ltd's Special electric can be specifically surface-treated by Na Sitai
Medicament is plated to make for evanohm UT-550.
Plating is with 0.5 ∽ 1.5A/dm for chromium-treated concrete operations2Room temperature is electroplated 1 minute.
After plating is completed for chromium processing, plating can be formed for layers of chrome in the zinc-plated nickel layer surface that step S200 is obtained, be one layer
Imitative plating sexavalence chrome plating makes the beautiful approximate plating Cr VI of appearance.
S400, Passivation Treatment is completed for layers of chrome surface in plating.
The dedicated plating medicament passivator production of Co., Ltd can be specifically surface-treated by Na Sitai.
Electrolytic passivation layer is obtained after Passivation Treatment, this is one layer of raising anticorrosion layer.
Fig. 2 is referred to, after the electroplating processes for completing step S100-S400, zinc coat can be sequentially formed on 1 surface of matrix
2, zinc-plated nickel layer 3, plating be for layers of chrome 4 and passivation film 5, wherein zinc coat 2 with a thickness of 10 μm of 6 ∽, zinc-plated nickel layer 3 with a thickness of
23 μm of ∽, plating is for layers of chrome 4 with a thickness of 3 μm of 2 ∽.
In conclusion making product reach plating Cr VI using hardware chromium replacement electroplating method provided in an embodiment of the present invention
Appearance also reduces the use of toxic heavy metal, Cr VI, cyanide etc., reduces environmental pollution, makes worker operation side
Just, process controllability greatly improves, to reduce costs, reduces fraction defective, improves production efficiency.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of hardware chromium replacement electroplating method, it is characterised in that: the following steps are included:
S100, zinc-plated processing is completed in matrix surface；
S200, plating zinc-nickel processing is completed in Several Thiourea Derivatives on Zinc Plate Surface；
S300, plating is completed for chromium processing on zinc-plated nickel layer surface；
S400, Passivation Treatment is completed for layers of chrome surface in plating.
2. hardware chromium replacement electroplating method according to claim 1, it is characterised in that: in the step s 100, the zinc-plated place
Electroplate liquid used in reason includes following ratio:
KCl:250g/L；
ZnCl2: 50g/L；
Brightener NT-ZincAC260A:0.5 ∽ 2ml/L；
Walk agent NT-ZincAC260B:20 ∽ 40ml/L.
3. hardware chromium replacement electroplating method according to claim 2, it is characterised in that: the zinc-plated processing in step S100 includes
With 2 ∽ 4A/dm2Room temperature is electroplated 25 minutes.
4. hardware chromium replacement electroplating method according to claim 2, it is characterised in that: in step s 200, the plating zinc-nickel
Electroplate liquid used in processing includes following ratio:
NaOH:120g/L；
ZnO:10g/L；
Brightener NT401A:1 ∽ 3ml/L；
Complexing agent NT401B:40 ∽ 80ml/L；
Replenishers NT401C:18 ∽ 22ml/L；
Brilliant thin agent NT401D:1 ∽ 3ml/L.
5. hardware chromium replacement electroplating method according to claim 4, it is characterised in that: the plating zinc-nickel in step S200 handles packet
It includes with 0.5 ∽ 4A/dm2Room temperature is electroplated 1 minute.
6. hardware chromium replacement electroplating method according to claim 2 or 4, it is characterised in that: in step S300, the plating generation
Electroplate liquid used in chromium processing includes following ratio:
For chromium open cylinder agent UT-550:250 ∽ 300ml/L；
Agent UT-550:80 ∽ 120ml/L is fed for chromium.
7. hardware chromium replacement electroplating method according to claim 6, it is characterised in that: the plating in step S300 is wrapped for chromium processing
It includes with 0.5 ∽ 1.5A/dm2Room temperature is electroplated 1 minute.
8. hardware chromium replacement electroplating method according to claim 3, it is characterised in that: described zinc-plated after the zinc-plated processing
Layer with a thickness of 10 μm of 6 ∽.
9. hardware chromium replacement electroplating method according to claim 5, it is characterised in that: after the plating zinc-nickel processing, the plating
Zinc-nickel layer with a thickness of 3 μm of 2 ∽.
10. hardware chromium replacement electroplating method according to claim 7, it is characterised in that: after the plating is for chromium processing, the plating
For layers of chrome with a thickness of 3 μm of 2 ∽.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910857685.4A CN110484939A (en) | 2019-09-09 | 2019-09-09 | A kind of hardware chromium replacement electroplating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910857685.4A CN110484939A (en) | 2019-09-09 | 2019-09-09 | A kind of hardware chromium replacement electroplating method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201850323U (en) * | 2010-11-09 | 2011-06-01 | 广州市海科顺表面处理有限公司 | Zinc-nickel alloy coating of screw fastener |
| CN103526245A (en) * | 2013-09-30 | 2014-01-22 | 朱卓敏 | New environment-friendly process for chromium barrel plating after chloride zinc plating |
| WO2017109834A1 (en) * | 2015-12-21 | 2017-06-29 | 地方独立行政法人大阪府立産業技術総合研究所 | Chromium plating solution, electroplating method, and method for producing chromium plating solution |
| CN108085724A (en) * | 2017-12-07 | 2018-05-29 | 江西博泉化学有限公司 | A kind of Zinc-Nickel coating layer technique |
| CN109267122A (en) * | 2018-11-21 | 2019-01-25 | 上海聆轩化工商行 | A kind of non-cyanide alkali Zinc-nickel alloy electroplating liquid and its preparation process |
-
2019
- 2019-09-09 CN CN201910857685.4A patent/CN110484939A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201850323U (en) * | 2010-11-09 | 2011-06-01 | 广州市海科顺表面处理有限公司 | Zinc-nickel alloy coating of screw fastener |
| CN103526245A (en) * | 2013-09-30 | 2014-01-22 | 朱卓敏 | New environment-friendly process for chromium barrel plating after chloride zinc plating |
| WO2017109834A1 (en) * | 2015-12-21 | 2017-06-29 | 地方独立行政法人大阪府立産業技術総合研究所 | Chromium plating solution, electroplating method, and method for producing chromium plating solution |
| CN108085724A (en) * | 2017-12-07 | 2018-05-29 | 江西博泉化学有限公司 | A kind of Zinc-Nickel coating layer technique |
| CN109267122A (en) * | 2018-11-21 | 2019-01-25 | 上海聆轩化工商行 | A kind of non-cyanide alkali Zinc-nickel alloy electroplating liquid and its preparation process |
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Application publication date: 20191122 |