CN1203284A - Method of producing insoluble electrode for composite electrolysis - Google Patents
Method of producing insoluble electrode for composite electrolysis Download PDFInfo
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- CN1203284A CN1203284A CN 98113885 CN98113885A CN1203284A CN 1203284 A CN1203284 A CN 1203284A CN 98113885 CN98113885 CN 98113885 CN 98113885 A CN98113885 A CN 98113885A CN 1203284 A CN1203284 A CN 1203284A
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- electrode
- rete
- insoluble electrode
- valve metal
- production method
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- Other Surface Treatments For Metallic Materials (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
A process for preparing non-soluble electrode used in compound electrolysis includes such technological steps as discharge treatment on the surface of electrode substrate to form a film layer and thermal spraying to form another film layer on the former layer. As strong anticorrosion material is used in discharge treatment, a film layer similar to non-crystal structure is formed, which can increase the adhesion and play the role to prevent substrate from being corroded and oxidized by electrolyte. The electrode features high current load, good conductivity and low cost.
Description
The present invention relates to a kind of production method of electrode, especially a kind of production method that can be used in the solution that contains hydrochloric acid, sulfuric acid, caustic alkali and salt ion in order to electrolytic electrode.
At present, the method of producing plating, electrode for electrolysis is a lot, general production method is to carry out the thermospray overlay film with the compound of metal or metal etc. to form the middle layer or form the catalyst carrier layer and form electrode then on metal base, but the thermospray overlay film is the contact surface of porous layer and base material and thermospray coating is again heterogeneous, so tack is bad.When electrode is used for electroplating or when solubility salt electrolyte solution carries out electrolysis, when particularly electrode places the solution that contains hydrochloric acid, sulfuric acid, caustic alkali and salt ion, can form not Dynamic Membrane between matrix and thermally sprayed coating, and the phenomenon of peeling off of thermospray coating takes place in meeting owing to corrosion and galvanic corrosion, interface resistance increases, and the anode electrode of using as oxidation can not normally be used.Advanced production method is with sputter and electronic beam method base material to be carried out overlay film, but the overlay film layer is too thin and be subjected to the restriction of shape and size and owing to apparatus expensive makes cost too high.
The purpose of this invention is to provide that a kind of overlay film layer tack is good, the production method of anti-little, the erosion-resisting insoluble electrode for composite electrolysis of interface resistance.
Technical solution of the present invention is: a kind of production method of insoluble electrode for composite electrolysis in turn includes the following steps:
A, carry out electrodischarge machining(E.D.M.) on the surface of electrode matrix 1 and form rete 2;
B, on rete 2, carry out film, form rete 3 with heat spraying method.
On rete 3, can the pyrolytic method coat, form rete 4.
It is that oxide compound with valve metal or valve metal is the electrodischarge machining(E.D.M.) that material was carried out that described discharge adds formula.
It is described that to carry out layer with heat spraying method be that oxide compound with valve metal or valve metal is a material.
The present invention compares with prior art, because electrodischarge machining(E.D.M.) is carried out with the material of strong corrosion resistant in the surface of matrix, formed approximate amorphism structural regime rete, the sticking power of upper layer is strengthened, simultaneously can play blocking effect, make electrolytic solution directly not contact matrix, prevent corrosion and the oxidation of electrolytic solution matrix, durable in use.And owing to enlarged the surface-area of electrode, make electrode can bear big electric current and pass through, the interface conductivity is good and cheap.
Fig. 1 is the synoptic diagram of the embodiment of the invention.
The present invention will be further described below in conjunction with drawings and Examples.As shown in Figure 1, matrix 1 is to make by having the valve metal that electrode must the tool performance, and promptly electric current has the metal of uniflux on electrode, as Ti, Ta, Nb, Zr, Hf, V, Mo, W, Pb etc.The embodiment of the invention is to make matrix 1 with the titanium plate, soaks after 8 hours with Al with oxalic acid
2O
3Spray is noisy carries out hacking to matrix 1 surface, coating is carried out on matrix 1 surface, formation rete 2, promptly available WC, TiC, W with the discharge cladding machine of Japanese Techno Coat corporate system with the oxide compound of valve metal or valve metal
2B
5, WSi
2, Mo
2B
5, MoSi
2, PbO, Pb
2O, Pb
3O
4, Pb
2O
3Carry out layer Deng carrying out electrodischarge machining(E.D.M.), it is thick that rete 2 can be 20 μ m, and then carry out overlay film with heat spraying method on rete 2, forms rete 3.Thermospray can be used HVOF machine (thermospray of high speed oxygen), with valve metal or valve metal oxides such as WC, TiC, W
2B
5Deng carrying out thermospray, it is thick that rete 3 can be 100 μ m.Coat with the pyrolytic method on rete 3 at last, form rete 4, the alloy of available platinum group metal metal or platinum group metal metal coats, and is coated with as the butanol solution with platinum chloride, and with 500 ℃ high bake, thickness can reach about 1 μ m.At last, in order to improve the electrolysis ability, can be on coating layer 4 again the mixture with 70% iridium, 30% tantalum be coated with, with 500 ℃ of high bakes, thickness can reach 20 μ m, has promptly formed rete 5.
Claims (4)
1, a kind of production method of insoluble electrode for composite electrolysis is characterized in that in turn including the following steps:
A, carry out electrodischarge machining(E.D.M.) on the surface of electrode matrix [1] and form rete [2];
B, go up at rete [2] and to carry out film, form rete [3] with heat spraying method.
2, the production method of insoluble electrode for composite electrolysis according to claim 1 is characterized in that: go up at rete [3] and coat formation rete [4] with the pyrolytic method.
3, the production method of insoluble electrode for composite electrolysis according to claim 1 and 2 is characterized in that: described electrodischarge machining(E.D.M.) is that the oxide compound with valve metal or valve metal is the electrodischarge machining(E.D.M.) that material was carried out.
4, the production method of insoluble electrode for composite electrolysis according to claim 1 and 2 is characterized in that: described to carry out layer with heat spraying method be that oxide compound with valve metal or valve metal is a material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113885 CN1096505C (en) | 1998-04-03 | 1998-04-03 | Method of producing insoluble electrode for composite electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113885 CN1096505C (en) | 1998-04-03 | 1998-04-03 | Method of producing insoluble electrode for composite electrolysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1203284A true CN1203284A (en) | 1998-12-30 |
| CN1096505C CN1096505C (en) | 2002-12-18 |
Family
ID=5223580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98113885 Expired - Fee Related CN1096505C (en) | 1998-04-03 | 1998-04-03 | Method of producing insoluble electrode for composite electrolysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1096505C (en) |
-
1998
- 1998-04-03 CN CN 98113885 patent/CN1096505C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1096505C (en) | 2002-12-18 |
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