CN110714219A - Method for electroplating nickel on magnesium alloy micro-arc oxidation surface - Google Patents
Method for electroplating nickel on magnesium alloy micro-arc oxidation surface Download PDFInfo
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- CN110714219A CN110714219A CN201911063704.2A CN201911063704A CN110714219A CN 110714219 A CN110714219 A CN 110714219A CN 201911063704 A CN201911063704 A CN 201911063704A CN 110714219 A CN110714219 A CN 110714219A
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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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1655—Process features
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/42—Coating with noble metals
- C23C18/44—Coating with noble metals using reducing agents
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
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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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
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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
Abstract
The invention relates to a method for electroplating nickel on a magnesium alloy micro-arc oxidation surface, belonging to the technical field of metal surface corrosion prevention. Applying electroplated nickel on the surface of the micro-arc oxidation coating magnesium alloy, wherein an oxide film of the magnesium alloy is broken down under the action of high voltage and is melted at high temperature to generate micro-arc discharge so as to form a ceramic oxide layer; coating a layer of silver metal particles on the surface of the porous micro-arc oxidation film by a spraying device through silver mirror reaction so as to enable the surface to be conductive; and after the silver spraying treatment is finished, performing direct current plating to form a nickel plating layer on the surface. Has the advantages that: the nickel electroplating after the silver spraying on the micro-arc oxidation surface of the magnesium alloy does not need to carry out a complicated surface treatment process of the traditional magnesium alloy electroplating, thereby not only improving the production efficiency, but also avoiding heavy metal pollution. Meanwhile, the insulating property of the ceramic layer further improves the corrosion performance. The method for applying the electroplated nickel on the surface of the micro-arc oxidation coated magnesium alloy can quickly, simply and conveniently prepare the electroplated nickel film on the surface of the micro-arc oxidation coated magnesium alloy.
Description
Technical Field
The invention relates to the technical field of metal surface corrosion prevention, in particular to a technology for quickly electroplating nickel on a magnesium alloy surface through micro-arc oxidation, and particularly relates to a method for electroplating nickel on a magnesium alloy surface through micro-arc oxidation.
Background
Magnesium is the eighth most abundant element of the earth crust, so that enough resources are available to ensure the use of the alloy in various engineering fields. The magnesium alloy has proved to have the highest specific strength, and the excellent mechanical property meets the requirements of energy conservation and emission reduction; the magnesium alloy also has excellent damping capacity, and the performance can be widely applied to 3C products; is non-toxic to the environment and human body (magnesium alloy is one of the ideal choices for biodegradable implants). Magnesium alloys have excellent castability allowing complex shapes to be manufactured by high productivity methods such as high pressure die casting. In addition, the magnesium alloy is easy to machine and form by high-speed milling and turning. The susceptibility of magnesium alloys to corrosion is still significantly limited by the use of magnesium alloys. Corrosion resistance is an important parameter in many metal applications. Magnesium has low chemical activity, a standard electrode potential of-2.363V at 25 ℃, about 1.9V lower than iron and about 0.7V lower than aluminum, being the lowest of all structural metals. The oxide film (Mg O) formed on the surface of magnesium and its alloys cannot become a dense protective film. Magnesium also has a negative differential effect and corrosion is exacerbated when in contact with a cathodic metal or component.
The reasonable and economic magnesium alloy corrosion prevention method has great practical significance. As is well known, surface treatment is the simplest and straightforward way in corrosion protection, and how to quickly obtain a surface coating on the surface of a magnesium alloy that has good adhesion and can improve its corrosion resistance is the key to this problem. In recent years, micro-arc oxidation, metal plating and other methods have been developed to improve the corrosion resistance of magnesium alloys. Although micro-arc oxidation coatings have many desirable characteristics, such as high bond strength to the substrate and good wear resistance. But the surface has many pores and cracks, which greatly reduce the corrosion resistance. Plating requires the sample surface to be conductive. Both of these approaches have certain limitations.
In the patent No. CN109898122A, the preparation of micro-arc oxidation solution and micro-arc oxidation of the pretreated magnesium alloy to form a micro-arc oxidation film, the magnesium alloy after micro-arc oxidation is used as the anode and the magnesium alloy sheet is used as the cathode by the dc power supply, and electrodeposition is performed in the graphene oxide electrolyte. And finally, taking out the positive magnesium alloy sample to obtain the magnesium alloy surface micro-arc oxidation/graphene oxide composite film. The surface of the composite film prepared by the method is uniform and flat, has a typical fold structure of graphene oxide, has lower corrosion current density, and can better improve the corrosion resistance of the magnesium alloy. Although the method can effectively improve the corrosion resistance of the magnesium alloy micro-arc oxidation film layer, the graphene oxide is expensive and cannot be popularized and used in factories.
Sonnerghuang et al, in Chinese patent (CN 107460481A), disclose a method for preparing a magnesium alloy micro-arc oxidation and chemical nickel plating composite coating, which carries out micro-arc oxidation on the surface of a magnesium alloy substrate to form a micro-arc oxidation ceramic film layer. And (3) putting the magnesium alloy matrix subjected to micro-arc oxidation into a sensitization treatment at room temperature, and then carrying out activation treatment in a silver nitrate solution. And carrying out chemical nickel plating after treatment. The defects of the micro-arc oxidation and chemical nickel plating composite coating are far less than those of the traditional micro-arc oxidation film layer, and the corrosion resistance is improved. However, this process requires high surface cleanliness and requires immersion in silver nitrate solution. The chemical nickel plating requires high temperature, high energy consumption and complex experimental operation.
Disclosure of Invention
The invention aims to provide a method for electroplating nickel on a magnesium alloy micro-arc oxidation surface, which solves the problems in the prior art. The method utilizes silver mirror reaction to spray a layer of silver particles on the surface of the micro-arc oxidation piece. Electroplating is carried out after the spraying is finished, the advantages of the micro-arc oxidation film layer and the electroplating film layer are combined, and a quick and efficient treatment method is provided for corrosion prevention of the magnesium alloy.
The above object of the present invention is achieved by the following technical solutions:
the method for electroplating nickel on the micro-arc oxidation surface of the magnesium alloy comprises the following steps of (1) under the action of high voltage, breaking down an oxide film of the magnesium alloy, melting the magnesium alloy at high temperature to generate a micro-arc discharge phenomenon, and forming a ceramic oxide layer; coating a layer of silver metal particles on the surface of the porous micro-arc oxidation film by a spraying device through silver mirror reaction so as to enable the surface to be conductive; and after the silver spraying treatment is finished, performing direct current plating to form a nickel plating layer on the surface. The method comprises the following steps:
removing an oxide film on the surface of a sample by a magnesium alloy mechanical polishing mode, removing oil, and preparing for micro-arc oxidation treatment;
step (2) preparing micro-arc oxidation electrolyte, NaAlO2，KF，Na3C6H5O7·2H2O, NaOH, placing the sample in the anode of a micro-arc oxidation device, using a stainless steel electrolytic tank as a cathode, and performing micro-arc oxidation processing for 15 minutes in a constant voltage mode, wherein the final voltage is 440V;
drying the sample subjected to micro-arc oxidation, preparing a silver ammonia solution, and arranging two empty bottles for respectively containing the silver ammonia solution and the glucose solution; mixing and spraying the empty bottle solution on the surface of the sample by adopting a spraying device;
and (4) washing the sprayed sample with deionized water, preparing an electroplating nickel solution, and immersing the sample into the electroplating solution for electroplating nickel treatment. Spraying silver on the micro-arc oxidation surface, so that a layer of silver particles is formed on the micro-arc oxidation surface of the magnesium alloy, and the surface has certain conductivity; the presence of conductivity allows the plating process to proceed smoothly.
The invention has the beneficial effects that: the nickel electroplating after the silver spraying on the micro-arc oxidation surface of the magnesium alloy does not need to carry out a complicated surface treatment process of the traditional magnesium alloy electroplating, thereby not only improving the production efficiency, but also avoiding heavy metal pollution. Meanwhile, the insulating property of the ceramic layer further improves the corrosion performance. The method for applying the electroplated nickel on the surface of the micro-arc oxidation coated magnesium alloy can quickly, simply and conveniently prepare the electroplated nickel film on the surface of the micro-arc oxidation coated magnesium alloy.
Detailed Description
According to the method for electroplating nickel on the magnesium alloy micro-arc oxidation surface, the magnesium alloy forms a ceramic oxidation layer after micro-arc oxidation treatment; suspending the sample, and performing surface silver spraying treatment; taking out the sample, drying and immersing the sample into an electroplating bath for nickel electroplating treatment. The method comprises the following steps:
removing an oxide film on the surface of a sample with the size of 30 multiplied by 10 multiplied by 3mm in a magnesium alloy mechanical polishing mode, removing oil, and preparing for micro-arc oxidation treatment;
step (2) preparing micro-arc oxidation electrolyte, NaAlO2，KF，Na3C6H5O7·2H2O, NaOH, placing the sample in the anode of a micro-arc oxidation device, using a stainless steel electrolytic tank as a cathode, and performing micro-arc oxidation processing for 15 minutes in a constant voltage mode, wherein the final voltage is 440V;
and (3) drying the sample subjected to micro-arc oxidation, preparing a silver ammonia solution, and arranging two empty bottles for respectively containing the silver ammonia solution and the glucose solution. And (4) mixing and spraying the empty bottle solution on the surface of the sample by adopting a spraying device.
And (4) washing the sprayed sample with deionized water, preparing an electroplating nickel solution, and immersing the sample into the electroplating solution for electroplating nickel treatment.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like of the present invention shall be included in the protection scope of the present invention.
Claims (3)
1. A method for electroplating nickel on the micro-arc oxidation surface of magnesium alloy is characterized by comprising the following steps: under the action of high voltage, an oxide film of the magnesium alloy is broken down and melted at high temperature to generate micro-arc discharge so as to form a ceramic oxide layer; coating a layer of silver metal particles on the surface of the porous micro-arc oxidation film by a spraying device through silver mirror reaction so as to enable the surface to be conductive; and after the silver spraying treatment is finished, performing direct current plating to form a nickel plating layer on the surface.
2. The method for electroplating nickel on the magnesium alloy micro-arc oxidation surface according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
removing an oxide film on the surface of a sample by a magnesium alloy mechanical polishing mode, removing oil, and preparing for micro-arc oxidation treatment;
step (2) preparing micro-arc oxidation electrolyte, NaAlO2，KF，Na3C6H5O7·2H2O, NaOH, placing the sample in the anode of a micro-arc oxidation device, using a stainless steel electrolytic tank as a cathode, and performing micro-arc oxidation processing for 15 minutes in a constant voltage mode, wherein the final voltage is 440V;
drying the sample subjected to micro-arc oxidation, preparing a silver ammonia solution, and arranging two empty bottles for respectively containing the silver ammonia solution and the glucose solution; mixing and spraying the empty bottle solution on the surface of the sample by adopting a spraying device;
and (4) washing the sprayed sample with deionized water, preparing an electroplating nickel solution, and immersing the sample into the electroplating solution for electroplating nickel treatment.
3. The method for electroplating nickel on the magnesium alloy micro-arc oxidation surface according to claim 1, characterized by comprising the following steps: performing silver spraying treatment on the micro-arc oxidized surface, so that a layer of silver particles is formed on the micro-arc oxidized surface of the magnesium alloy, and the surface has certain conductivity; the presence of conductivity allows the plating process to proceed smoothly.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112064037A (en) * | 2020-10-13 | 2020-12-11 | 贵州电网有限责任公司 | Preparation method of corrosion-resistant magnesium alloy sacrificial anode |
| CN113463160A (en) * | 2021-07-02 | 2021-10-01 | 索罗曼(常州)合金新材料有限公司 | Method for realizing titanium alloy wear-resistant coating |
| CN114606552A (en) * | 2022-05-07 | 2022-06-10 | 山西银光华盛镁业股份有限公司 | Preparation method of magnesium alloy with conductive anodic oxide film on surface |
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| CN113463160A (en) * | 2021-07-02 | 2021-10-01 | 索罗曼(常州)合金新材料有限公司 | Method for realizing titanium alloy wear-resistant coating |
| CN114606552A (en) * | 2022-05-07 | 2022-06-10 | 山西银光华盛镁业股份有限公司 | Preparation method of magnesium alloy with conductive anodic oxide film on surface |
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