CN115181965A - Method for preparing platinum-plated metal material by flame thermal decomposition method - Google Patents
Method for preparing platinum-plated metal material by flame thermal decomposition method Download PDFInfo
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- CN115181965A CN115181965A CN202210819913.0A CN202210819913A CN115181965A CN 115181965 A CN115181965 A CN 115181965A CN 202210819913 A CN202210819913 A CN 202210819913A CN 115181965 A CN115181965 A CN 115181965A
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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
- C23C18/02—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 thermal decomposition
- C23C18/04—Pretreatment of the material to be coated
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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
- C23C18/02—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 thermal decomposition
- C23C18/08—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 thermal decomposition characterised by the deposition of metallic material
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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
- C23C28/3455—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 with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory 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
- C25D11/26—Anodisation of refractory metals or alloys based thereon
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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
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a method for preparing a platinum-plated metal material by a flame thermal decomposition method, which comprises the following steps: s1, pretreatment of a base material: selecting a corrosion-resistant metal material as a base material, and carrying out shape correction, pre-oxidation, sand blasting and acid etching on the base material; s2, coating liquid preparation: preparing platinum-containing noble metal coating liquid from platinum salt, a coordination agent, a stabilizing agent, a dispersing agent, a brightening agent and a thermal reducing agent; s3, platinizing: and coating the platinum-containing noble metal coating liquid on the pretreated substrate, airing, roasting, naturally cooling to room temperature, repeatedly coating, airing, flame sintering and cooling until the loading capacity of the noble metal platinum meets the requirement, and finally placing the platinum-containing noble metal coating liquid in a muffle furnace at 300-750 ℃ for heat preservation for 5-1000 min. The invention utilizes the characteristic that platinum and its oxide are generated by platinum salt solution decomposition at high temperature and in active ion atmosphere, the coating liquid containing platinum is coated on the base material, and the metal material with noble metal platinum coating is prepared by drying and flame thermal decomposition.
Description
Technical Field
The invention relates to preparation and application of a precious metal coating material, belongs to the fields of electrochemical industry and corrosion protection, and particularly relates to a method for preparing a platinum-plated metal material by a flame thermal decomposition method.
Background
The noble metal platinum is the most typical metal of platinum group metals, and has good ductility, thermal conductivity, electrical conductivity and corrosion resistance. Because of its numerous advantages, platinum metal has many irreplaceable roles in industry and daily life. The platinum-plated product is widely used in key parts in aerospace, and in addition, a platinum-plated anode plate is also used in a cyanide electroplating system, and the industries of an electrolytic water electrode plate, jewelry ornaments and the like are also important application fields. However, platinum group elements are precious metals, are scarce in reserves and expensive, and the scarcity limits the use of platinum in industrial applications over large areas. Therefore, reducing the usage amount of platinum and increasing the usage rate of platinum become the current problems to be solved.
In the field of surface finishing, electroplating technology is widely applied, and the obtained plating layer has excellent characteristics, but the one-time investment is large and the equipment maintenance cost is high.
The development of high performance platinized metal coatings should meet the following basic conditions: if the material is used in the field of electrocatalysis, firstly, the electrode material has better electrocatalysis activity and selectivity, and the target electrochemical reaction is ensured to be efficiently and rapidly carried out; the electrode material has better conductivity and the electrode potential of the electrode material is low, so that the cell voltage and the energy consumption in the electrochemical reaction process are reduced; if the electrode material is used in the corrosion protection field, the electrode material should have good corrosion resistance and stability, ensure long service life, be easy to machine and form, have certain mechanical strength and be low in manufacturing cost. The metal oxide electrode has low manufacturing cost and simple preparation method, and is widely applied to the fields of environmental pollution treatment, fuel cells, electrochemical synthesis and the like at present.
Disclosure of Invention
In view of the disadvantages of the prior art, it is an object of the present invention to provide a method for preparing a platinum-plated metal material by a flame thermal decomposition method. The defects of large one-time investment, high maintenance cost of equipment and the like in the prior art are overcome. The characteristic that platinum and its oxide are generated by decomposition of platinum salt solution at high temperature and in active ion atmosphere is utilized, the coating liquid containing platinum is coated on the base material, and the metal material with noble metal platinum coating is prepared by drying and flame thermal decomposition.
The technical scheme adopted by the invention for solving the technical problem is as follows: a method for producing a platinum-plated metal material by a flame thermal decomposition method, comprising the steps of:
s1, pretreatment of a base material: selecting a corrosion-resistant metal material as a base material, and carrying out pretreatment on the base material, wherein the pretreatment comprises shape correction, pre-oxidation, sand blasting and acid etching;
s2, coating liquid preparation: uniformly mixing platinum salt, a coordination agent, a stabilizer, a dispersing agent, a brightening agent and a thermal reducing agent according to a certain ratio to prepare a platinum-containing noble metal coating liquid;
s3, platinizing: coating the platinum-containing noble metal coating liquid prepared in the step S2 on the base material pretreated in the step S1, naturally drying the base material, roasting the base material by using a gas flame gun, naturally cooling the base material to room temperature, and repeatedly coating for the second time; repeatedly brushing, airing, flame sintering and cooling until the loading capacity of the noble metal platinum meets the requirement, and finally putting the noble metal platinum into a muffle furnace at 300-750 ℃ for heat preservation for 5-1000 min.
In step S1, the metal material used as the base material is at least one of iron, nickel, titanium, tantalum, niobium, and an alloy of the above metals.
Further, in the step S1, the pretreatment of the substrate may further include preparing an intermediate layer, where the intermediate layer is prepared by anodic oxidation, and the anodic oxidation conditions are 0.1M to 2M sulfuric acid solution, oxidation voltage of 1V to 90V, and oxidation time of 5 to 1000min.
Further, in the step S2, the platinum salt is at least one of chloroplatinic acid, potassium chloroplatinate, sodium chloroplatinate, potassium hexahydroxyplatinate, and dinitrosoplatinum; the concentration of the platinum salt is 0.01-10M.
Further, in the step S2, the complexing agent is KCl or NaCl, and the concentration of the complexing agent is 1-3M; the stabilizing agent is citric acid, triammonium citrate and EDTA, and the concentration of the stabilizing agent is 0.001-1 g/L; the dispersant is a surfactant with 10ppm level; the brightening agent is calcium nitrate and calcium chloride, and the concentration of the brightening agent is 2mg/L; the thermal reducing agent is ascorbic acid and glucose, and the concentration of the thermal reducing agent is 180mg/L.
Further, in the step S3, the temperature of the gas flame gun is 150-3000 ℃; the flame gun roasting time is 5-300 min.
The invention has the beneficial effects that: compared with the prior art, the method for preparing the platinum-plated metal material by the flame thermal decomposition method provided by the invention solves the defects of large one-time investment, high maintenance cost of equipment and the like in the prior art. The characteristic that platinum and its oxide are generated by decomposition of platinum salt solution at high temperature and in active ion atmosphere is utilized, the coating liquid containing platinum is coated on the base material, and the coated anode plate with noble metal is prepared by drying and flame decomposition. The method can ensure that the preparation process is very simple, the obtained coating has high binding force with the matrix and good catalytic performance; and the one-time investment for using the process is small, the operation cost is low, the utilization rate of the noble metal is high, the energy consumption is low, and the cost is reduced.
Detailed Description
The invention is further illustrated by the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
The method comprises the steps of taking commercial pure titanium TA1 as a base material, carrying out shape correction and pre-oxidation for 2-3 hours in an air atmosphere, carrying out sand blasting for three times by using No. 3 white corundum sand, finally carrying out etching by using an oxalic acid solution with the concentration of 5%, wherein the formula of a coating liquid is 0.1M of chloroplatinic acid serving as a main salt, the concentration of a coordination agent KCl is 1M, 1g/L of citric acid serving as a stabilizing agent is added, a 10ppm surfactant serving as a dispersing agent is added to enable the solution to be dispersed more uniformly, and 2mg/L of calcium nitrate serving as a brightening agent is added to enable crystallization to be more refined and uniform. In order to disperse the coating liquid more uniformly, the coating liquid is placed in a magnetic stirring device to be stirred for 2 to 4 hours so as to be mixed uniformly. And uniformly coating the obtained coating liquid on a pretreated base material, naturally airing, controlling the temperature to be 550 ℃ by using a gas flame gun, roasting for 10min, naturally cooling to room temperature, repeatedly coating for the second time, repeatedly coating, airing, roasting with flame, cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally putting the base material in a 500 ℃ muffle furnace for heat preservation for 60min.
Example 2
The method is characterized in that commercial 316L stainless steel is used as a base material, a coating solution formula is 0.1M of chloroplatinic acid serving as a main salt, the concentration of a coordination agent KCl is 1M, 1g/L of citric acid serving as a stabilizing agent is added, a 10 ppm-level surfactant serving as a dispersing agent is added to enable the solution to be dispersed more uniformly, and 2mg/L of calcium nitrate serving as a brightening agent is added to enable crystallization to be more refined and uniform. In order to disperse the coating liquid more uniformly, the coating liquid is placed in a magnetic stirring device to be stirred for 2 to 4 hours so as to be mixed uniformly. And uniformly coating the obtained coating liquid on a pretreated substrate, naturally airing, controlling the temperature to be 450 ℃ by using a gas flame gun, roasting for 10min, naturally cooling to room temperature, repeatedly coating for the second time, repeatedly coating, airing, roasting with flame and cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally putting the substrate in a 500 ℃ muffle furnace for heat preservation for 60min.
Example 3
The method is characterized in that commercial pure tantalum is used as a base material, the middle layer is prepared in an anodic oxidation mode, the anodic oxidation condition is 1M sulfuric acid solution, the oxidation voltage is 30V, and the oxidation time is 60min. The liquid formula is 2M of main salt potassium hexahydroxyplatinate, the concentration of a coordination agent KCl is 3M, 1g/L of stabilizing agent sodium citrate is added, ppm-level surfactant is added to serve as a dispersing agent to enable the solution to be dispersed more uniformly, and 2mg/L of calcium nitrate is added to serve as a brightening agent to enable crystallization to be refined and uniform. In order to enable the coating liquid to be dispersed more uniformly, the coating liquid is placed in a magnetic stirring device and stirred for 2-4 hours to be uniformly mixed, the obtained coating liquid is uniformly coated on a pretreated base material, after natural airing, a gas flame gun is used for controlling the temperature to be 500 ℃ for roasting 10 minutes, then the temperature is naturally cooled to the room temperature, coating for the second time is repeated, coating, airing, flame roasting and cooling are repeatedly carried out until the loading capacity of the precious metals reaches the required loading capacity, and finally the coating liquid is placed in a 500 ℃ muffle furnace for heat preservation for 60 minutes.
Example 4
The method comprises the steps of taking a TA1 titanium material as a base material, carrying out hot pressing and shape correction for 2-3h in an air atmosphere, carrying out sand blasting for three times by using No. 3 white corundum, finally etching by using an oxalic acid solution with the concentration of 5%, adding 10ppm surfactant serving as a dispersing agent to enable the solution to be dispersed more uniformly, and adding 180mg/L ascorbic acid serving as a thermal reducing agent to enable the crystallization to be more compact and the appearance to be bright, wherein the concentration of sodium chloroplatinate serving as a main salt is 15g/L calculated by platinum, and the citric acid serving as a stabilizing agent is 1 g/L. The coating liquid is put into magnetic stirring and stirred for 2 to 4 hours to be mixed evenly. And uniformly coating the obtained coating liquid on a pretreated base material, baking the base material by using a 50 ℃ oven, roasting the base material for 10min by using a gas flame gun, naturally cooling the base material to room temperature, repeatedly coating for the second time, repeatedly coating, airing, roasting by using flame and cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally putting the base material into a 500 ℃ muffle furnace for heat preservation for 60min.
Example 5
Taking a TA1 titanium material as a base material, hot-pressing and correcting for 2-3h in an air atmosphere, then carrying out sand blasting for three times by using No. 2 white corundum, finally etching by using an oxalic acid solution with the concentration of 5%, wherein the coating liquid formula comprises a main salt dinitroso-diammine platinum with the concentration of 13g/L calculated by platinum, a stabilizing agent citric acid with the concentration of 1g/L, a 10ppm surfactant serving as a dispersing agent is added to enable the solution to be dispersed more uniformly, and glucose with the concentration of 180mg/L serving as a thermal reducing agent is added to enable the crystallization to be more compact and the appearance to be bright. The coating liquid is put into magnetic stirring and stirred for 2 to 4 hours to be mixed evenly. And uniformly coating the obtained coating liquid on a pretreated base material, baking the base material by using a 50 ℃ oven, roasting the base material for 10min by using a gas flame gun, naturally cooling the base material to room temperature, repeatedly coating for the second time, repeatedly coating, airing, roasting by using flame and cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally putting the base material into a 500 ℃ muffle furnace for heat preservation for 60min.
Comparative example 1
Brushing-thermal decomposition: taking a TA1 titanium material as a base material, hot-pressing and correcting for 2-3h in an air atmosphere, then carrying out sand blasting for three times by using No. 2 white corundum, finally etching by using an oxalic acid solution with the concentration of 5%, wherein the coating liquid formula comprises a main salt dinitroso-diammine platinum with the concentration of 13g/L calculated by platinum, a stabilizing agent citric acid with the concentration of 1g/L, a 10ppm surfactant serving as a dispersing agent is added to enable the solution to be dispersed more uniformly, and glucose with the concentration of 180mg/L serving as a thermal reducing agent is added to enable the crystallization to be more compact and the appearance to be bright. The coating liquid is stirred for 2 to 4 hours in magnetic stirring to be evenly mixed. And uniformly coating the obtained coating liquid on a pretreated base material, drying the base material by using a 50 ℃ drying oven, then placing the base material into a 500 ℃ muffle furnace for heat preservation for 10min, naturally cooling the base material to room temperature, repeating the second coating, repeatedly coating, airing, preserving heat at 500 ℃ and cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally placing the base material into the 500 ℃ muffle furnace for heat preservation for 60min.
Comparative example 2
Spin coating-thermal decomposition: taking a TA1 titanium material as a base material, hot-pressing and correcting for 2-3h in an air atmosphere, then carrying out sand blasting for three times by using No. 2 white corundum, finally etching by using an oxalic acid solution with the concentration of 5%, wherein the coating liquid formula comprises a main salt dinitroso-diammine platinum with the concentration of 13g/L calculated by platinum, a stabilizing agent citric acid with the concentration of 1g/L, a 10ppm surfactant serving as a dispersing agent is added to enable the solution to be dispersed more uniformly, and glucose with the concentration of 180mg/L serving as a thermal reducing agent is added to enable the crystallization to be more compact and the appearance to be bright. The coating liquid is put into magnetic stirring and stirred for 2 to 4 hours to be mixed evenly. And coating the obtained coating liquid on a pretreated base material by using a spin coating method, drying the base material by using a 50 ℃ drying oven, then putting the base material into a 500 ℃ muffle furnace for heat preservation for 10min, naturally cooling to room temperature, repeating the second spin coating, repeatedly performing the spin coating, air drying, heat preservation at 500 ℃ and cooling until the loading capacity of the noble metal reaches the required loading capacity, and finally putting the base material into the 500 ℃ muffle furnace for heat preservation for 60min.
The materials obtained in examples 1 to 5 and comparative examples 1 to 2 were subjected to the adhesion and conductivity tests, and the results are shown in the following table.
| Binding power (thermal shock method) | Conductivity (national standard method) | |
| Example 1 | 8 times of no peeling | 4mΩ |
| Example 2 | No peeling 11 times | 3mΩ |
| Example 3 | No peeling for 7 times | 9mΩ |
| Example 4 | No peeling for 10 times | 3mΩ |
| Example 5 | 12 times of no peeling | 2mΩ |
| Comparative example 1 | Peeling for 3 times | 67mΩ |
| Comparative example 2 | Peeling for 5 times | 37mΩ |
The above embodiments are only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (6)
1. A method for producing a platinum-plated metal material by a flame thermal decomposition method, characterized by comprising the steps of:
s1, pretreatment of a base material: selecting a corrosion-resistant metal material as a base material, and carrying out pretreatment on the base material, wherein the pretreatment comprises shape correction, pre-oxidation, sand blasting and acid etching;
s2, coating liquid preparation: uniformly mixing platinum salt, a coordination agent, a stabilizer, a dispersing agent, a brightening agent and a thermal reducing agent according to a certain ratio to prepare a platinum-containing noble metal coating liquid;
s3, platinizing: coating the platinum-containing noble metal coating liquid prepared in the step S2 on the base material pretreated in the step S1, naturally drying the base material, roasting the base material by using a gas flame gun, naturally cooling the base material to room temperature, and repeatedly coating for the second time; repeatedly brushing, airing, flame sintering and cooling until the loading capacity of the noble metal platinum meets the requirement, and finally putting the noble metal platinum into a muffle furnace at 300-750 ℃ for heat preservation for 5-1000 min.
2. The method for producing a platinum-plated metal material by flame thermal decomposition according to claim 1, wherein: in step S1, the metal material used as the base material is at least one of iron, nickel, titanium, tantalum, niobium, or an alloy of the above metals.
3. The method for producing a platinum-plated metal material by flame thermal decomposition according to claim 1, wherein: in the step S1, the pretreatment of the substrate may further include preparing an intermediate layer, where the intermediate layer is prepared by anodic oxidation, and the anodic oxidation conditions include 0.1M to 2M sulfuric acid solution, an oxidation voltage of 1V to 90V, and an oxidation time of 5 to 1000min.
4. The method for producing a platinum-plated metal material by flame thermal decomposition according to claim 1, wherein: in the step S2, the platinum salt is at least one of chloroplatinic acid, potassium chloroplatinate, sodium chloroplatinate, potassium hexahydroxyplatinate, and dinitroso diammineplatinum; the concentration of the platinum salt is 0.01-10M.
5. The method for producing a platinum-plated metal material by flame thermal decomposition according to claim 1, wherein: in the step S2, the complexing agent is KCl or NaCl, and the concentration of the complexing agent is 1-3M; the stabilizing agent is citric acid, triammonium citrate and EDTA, and the concentration of the stabilizing agent is 0.001-1 g/L; the dispersant is a surfactant with 10ppm level; the brightening agent is calcium nitrate and calcium chloride, and the concentration of the brightening agent is 2mg/L; the thermal reducing agent is ascorbic acid and glucose, and the concentration of the thermal reducing agent is 180mg/L.
6. The method for producing a platinum-plated metal material by flame thermal decomposition according to claim 1, wherein: in the step S3, the roasting temperature of a gas flame gun is 150-3000 ℃; the flame gun roasting time is 5-300 min.
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| JP2006265707A (en) * | 2005-03-25 | 2006-10-05 | Furuya Kinzoku:Kk | Coating method for platinum |
| CN112663124A (en) * | 2020-12-18 | 2021-04-16 | 西安泰金工业电化学技术有限公司 | Preparation method of precious metal anode for horizontal electroplating of PCB |
| CN113957473A (en) * | 2021-10-28 | 2022-01-21 | 西安泰金工业电化学技术有限公司 | Preparation method of titanium anode with multilayer structure |
| CN114164419A (en) * | 2021-11-23 | 2022-03-11 | 西安泰金工业电化学技术有限公司 | Method for preparing platinum active layer on anode plate by thermal decomposition method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265707A (en) * | 2005-03-25 | 2006-10-05 | Furuya Kinzoku:Kk | Coating method for platinum |
| CN112663124A (en) * | 2020-12-18 | 2021-04-16 | 西安泰金工业电化学技术有限公司 | Preparation method of precious metal anode for horizontal electroplating of PCB |
| CN113957473A (en) * | 2021-10-28 | 2022-01-21 | 西安泰金工业电化学技术有限公司 | Preparation method of titanium anode with multilayer structure |
| CN114164419A (en) * | 2021-11-23 | 2022-03-11 | 西安泰金工业电化学技术有限公司 | Method for preparing platinum active layer on anode plate by thermal decomposition method |
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