Titanium-clad aluminum composite electrode and electrode device
Through the titanium-clad aluminum composite electrode structure, including aluminum core layer, titanium layer, titanium mesh layer and oxide layer, the existing titanium-based electrode materials have been solved, and more efficient Conductivity and corrosion resistance reduce costs and extend the service life of the electrode.
Patent Information
- Application Number
- CN202420801372.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing titanium-based oxide electrodes have high material cost and poor electrical conductivity in nonferrous metal electrolysis/electrogenesis technology, and the binding force between the titanium matrix and the surface oxide layer is insufficient, especially in acidic solutions.
The titanium-clad aluminum composite electrode structure is adopted, including an aluminum core layer, a titanium layer and a titanium mesh layer, an intermediate transition layer and an oxide layer. Through these hierarchical structures, the conductive properties and the bonding force between the oxide layer and the electrode matrix are improved, and the material cost is reduced.
It improves the conductivity and corrosion resistance of the electrode, reduces material costs, and enhances the bonding force between the oxide layer and the electrode substrate, ensures that the oxide layer is not easy to fall off, and extends the service life of the electrode.
Smart Images
Figure CN222300323U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a titanium-clad aluminum composite electrode and an electrode device, belonging to the technical field of nonferrous metal electrolysis / electrodeposition. Background Art
[0002] At present, in the field of non-ferrous metal electrolysis / electrodeposition technology, the more common types of non-precious metal oxide electrodes are titanium-based manganese dioxide and titanium-based lead dioxide. The main disadvantages of this type of electrode are:
[0003] 1) Excessive use of titanium not only increases the material cost, but also the electrical conductivity needs to be improved.
[0004] 2) The bonding force between the titanium matrix and the surface oxide layer is poor, which makes the surface oxide layer easy to fall off, especially in highly corrosive acidic solutions. Utility Model Content
[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a titanium-clad aluminum composite electrode and an electrode device which can reduce material costs, improve electrical conductivity, and increase the bonding strength between the electrode substrate and the surface oxide layer.
[0006] The purpose of the utility model is achieved through the following technical solutions:
[0007] A titanium-clad aluminum composite electrode comprises an electrode substrate, which is a multi-layer composite structure and comprises, from the center to the outside, an aluminum core layer, a titanium layer coated on the outer surface of the aluminum core layer, and a titanium mesh layer coated on the outer surface of the titanium layer.
[0008] Furthermore, the titanium-clad aluminum composite electrode also includes an intermediate transition layer covering the surface of the electrode substrate and an oxide layer covering the surface of the intermediate transition layer.
[0009] Furthermore, the intermediate transition layer includes a first part covering the outer surface of the titanium mesh layer, a second part covering the mesh surface of the titanium mesh layer, and a third part covering the outer surface of the titanium layer corresponding to the mesh of the titanium mesh layer, and the oxide layer covers the outer surfaces of the first part, the second part and the third part.
[0010] Furthermore, the intermediate transition layer is a metal oxide coating of tin and antimony or a metal oxide coating of titanium and tantalum, and the oxide layer is a lead dioxide electroplating layer or a manganese dioxide electroplating layer.
[0011] Furthermore, the titanium-clad aluminum composite electrode is in the shape of a bar as a whole, and its cross section is waist-shaped, elliptical or circular.
[0012] Furthermore, the thickness of the titanium layer is 0.5-2 mm, the thickness of the titanium mesh layer is 0.3-1 mm, the thickness of the intermediate transition layer is 0.3-1.2 mm, and the thickness of the oxide layer is 0.3-1.2 mm.
[0013] Furthermore, the aluminum core layer is a solid structure layer made of aluminum or aluminum alloy, the titanium layer is an annular solid structure layer made of titanium or titanium alloy, and the titanium mesh layer is an annular mesh structure layer made of titanium or titanium alloy.
[0014] Furthermore, the inner surface of the titanium layer is tightly fitted to the outer surface of the aluminum core layer, and the inner surface of the titanium mesh layer is also tightly fitted to the outer surface of the titanium layer.
[0015] An electrode device comprises a conductive beam, a connecting beam and a plurality of electrode strips, wherein the conductive beam and the connecting beam are arranged in parallel and spaced apart in the up-down direction, and the plurality of electrode strips are arranged in parallel and spaced apart in the left-right direction between the conductive beam and the connecting beam, and the upper and lower ends of each electrode strip are respectively fixedly connected to the conductive beam and the connecting beam, and each electrode strip adopts the titanium-clad aluminum composite electrode structure as described above.
[0016] Furthermore, each electrode strip is composed of a main body and an upper end portion located at the upper end of the main body, the main body of each electrode strip adopts the titanium-clad aluminum composite electrode structure as described above, the upper end portion of each electrode strip only includes an aluminum core layer and a titanium layer coated on the outer surface of the aluminum core layer, the conductive beam includes a conductive copper rod and a cast lead layer coated on the outer surface of the conductive copper rod, and the upper end portion of each electrode strip is connected to the conductive copper rod through the cast lead layer.
[0017] The beneficial effects of the utility model are:
[0018] Firstly, the electrode substrate in the titanium-clad aluminum composite electrode of the utility model is composed of an aluminum core layer, a titanium layer and a titanium mesh layer. On the one hand, since the electrical conductivity of aluminum is stronger than that of titanium and the material cost of aluminum is lower than that of titanium, when the core layer is made of aluminum, not only the electrical conductivity of the electrode can be improved, but also the material cost of the electrode can be reduced under the condition of the same thickness. On the other hand, since titanium has a high degree of corrosion resistance, a titanium layer is coated on the surface of the aluminum core layer to ensure the corrosion resistance of the electrode. On the other hand, the titanium mesh layer coated on the surface of the titanium layer allows the electrode substrate to be subjected to surface oxidation treatment. The oxide layer can not only cover the surface of the titanium mesh layer, but also enter the mesh of the titanium mesh layer to cover the mesh surface and the surface of the titanium layer, thereby increasing the bonding area between the oxide layer and the electrode substrate, improving the bonding force between the two, and then ensuring that the oxide layer is not easy to fall off.
[0019] Secondly, in the present invention, the provision of the intermediate transition layer can further ensure or increase the bonding force between the oxide layer and the surface of the electrode substrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a front view of the titanium-clad aluminum composite electrode of the utility model.
[0021] Figure 2 yes Figure 1 The cross-sectional view of Example 1 of AA is a schematic diagram of the structure of the titanium-clad aluminum composite electrode of the utility model having a waist-shaped cross section.
[0022] Figure 3 yes Figure 1 The second cross-sectional view of Example AA in FIG. 1 is a schematic diagram of the structure of the titanium-clad aluminum composite electrode of the utility model having an elliptical cross-section.
[0023] Figure 4 yes Figure 1 The example three sectional views of AA in FIG. 1 are schematic diagrams of the structure of the titanium-clad aluminum composite electrode of the utility model having a circular cross-section.
[0024] Figure 5 It is a front view of the electrode device of the utility model.
[0025] Figure 6 yes Figure 5 Schematic diagram of the cross-section of BB. DETAILED DESCRIPTION
[0026] The utility model is further described in detail below with reference to the embodiments given in the accompanying drawings.
[0027] like Figures 1 to 4 As shown, the utility model provides a titanium-clad aluminum composite electrode, including an electrode substrate 1. The electrode substrate 1 is a multi-layer composite structure, which includes, from the center to the outside, an aluminum core layer 11, a titanium layer 12 coated on the outer surface of the aluminum core layer 11, and a titanium mesh layer 13 coated on the outer surface of the titanium layer 12.
[0028] The titanium-clad aluminum composite electrode further includes an intermediate transition layer 2 covering the surface of the electrode substrate 1 and an oxide layer 3 covering the surface of the intermediate transition layer 2 .
[0029] Among them, the intermediate transition layer 2 includes a first part 21 covering the outer surface of the titanium mesh layer 13, a second part 22 covering the surface of the mesh 131 of the titanium mesh layer 13, and a third part 23 covering the outer surface of the titanium layer 12 corresponding to the mesh 131 of the titanium mesh layer. The oxide layer 3 covers the outer surfaces of the first part 21, the second part 22 and the third part 23, which can indirectly increase the bonding area between the oxide layer and the electrode substrate and improve the bonding force between the oxide layer and the electrode substrate.
[0030] In a preferred embodiment of the present invention, the intermediate transition layer 2 is a metal oxide coating of tin and antimony or a metal oxide coating of titanium and tantalum. Specifically, the function of the intermediate transition layer 2 is to increase the bonding force between the oxide layer 3 and the electrode substrate 1 from the material properties, so there are certain requirements for the material selection of the intermediate transition layer 2, and setting the intermediate transition layer 2 as a metal oxide coating of tin and antimony or a metal oxide coating of titanium and tantalum can better increase the bonding force between the oxide layer 3 and the electrode substrate 1.
[0031] In a preferred example of the utility model, the oxide layer 3 is a lead dioxide electroplating layer or a manganese dioxide electroplating layer, which can improve the corrosion resistance of the electrode and extend the service life of the electrode. At the same time, it can also improve the conductivity and wear resistance of the electrode, making the electrode surface more durable.
[0032] In a preferred example of the present invention, the titanium-clad aluminum composite electrode is in the shape of a bar as a whole, and its cross section is waist-shaped, elliptical or circular.
[0033] In a preferred example of the present invention, the thickness of the titanium layer 12 is 0.5-2mm, preferably 1-1.5mm; the thickness of the titanium mesh layer 13 is 0.3-1mm, preferably 0.5mm; the thickness of the intermediate transition layer 2 is 0.3-1.2mm, preferably 0.5-1mm; the thickness of the oxide layer 3 is 0.3-1.2mm, preferably 0.5-1mm.
[0034] In a preferred embodiment of the present invention, the aluminum core layer 11 is a solid structure layer of aluminum or aluminum alloy, the titanium layer 12 is an annular solid structure layer of titanium or titanium alloy, and the titanium mesh layer 13 is an annular mesh structure layer of titanium or titanium alloy. This can increase the electrode strength on the one hand, and effectively protect the aluminum core layer from corrosion on the other hand.
[0035] In a preferred embodiment of the present invention, the inner surface of the titanium layer 12 is tightly fitted to the outer surface of the aluminum core layer 11, and the inner surface of the titanium mesh layer 13 is also tightly fitted to the outer surface of the titanium layer 12, which makes it easier to ensure the conductivity of the electrode.
[0036] like Figure 5 and Figure 6 As shown, the utility model provides an electrode device, including a conductive beam 4, a connecting beam 5 and a plurality of electrode strips 6, wherein the conductive beam 4 and the connecting beam 5 are arranged in parallel and spaced apart in the up-down direction, and the plurality of electrode strips 6 are arranged in parallel and spaced apart in the left-right direction between the conductive beam 4 and the connecting beam 5, and the upper and lower ends of each electrode strip 6 are respectively fixedly connected to the conductive beam 4 and the connecting beam 5, wherein the fixed connection can be achieved by welding, and at the same time, each electrode strip 6 adopts the titanium-clad aluminum composite electrode structure as described above.
[0037] In a preferred example of the present invention, each electrode strip 6 is composed of a main body 61 and an upper end 62 located at the upper end of the main body 61. The main body 61 of each electrode strip 6 adopts the titanium-clad aluminum composite electrode structure as described above, and the upper end 62 of each electrode strip 6 only includes an aluminum core layer 11 and a titanium layer 12 coated on the outer surface of the aluminum core layer 11. That is to say, the upper end 62 of each electrode strip 6 is not provided with a titanium mesh layer 13, an intermediate transition layer 2 and an oxide layer 3. This is because when the electrode device of the present invention is placed in an electrolysis / electrodeposition cell for use, the upper end 62 of each electrode strip 6 is located at the upper end of the cell body and does not contact with the solution in the cell body to participate in the reaction. Therefore, the upper end 62 of each electrode strip 6 only needs to protect the aluminum core layer 11, that is, only the titanium layer 12 needs to be coated on the outer surface of the aluminum core layer 11 to prevent the aluminum core layer 11 from being splashed by the solution in the cell body and corroding it. This can reduce the production cost of each electrode strip 6.
[0038] Moreover, in this preferred example, the conductive beam 4 includes a conductive copper rod 41 and a cast lead layer 42 covering the outer surface of the conductive copper rod 41 , and the upper end 62 of each electrode strip 6 passes through the cast lead layer 42 and is connected to the conductive copper rod 41 .
[0039] The above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.
Claims
1. A titanium-clad aluminum composite electrode, comprising an electrode substrate, characterized in that: The electrode substrate is a multi-layer composite structure, which includes, from the center to the outside, an aluminum core layer, a titanium layer coated on the outer surface of the aluminum core layer, and a titanium mesh layer coated on the outer surface of the titanium layer.
2. The titanium-clad aluminum composite electrode according to claim 1, characterized in that: The titanium-clad aluminum composite electrode further comprises an intermediate transition layer covering the surface of the electrode substrate and an oxide layer covering the surface of the intermediate transition layer.
3. The titanium-clad aluminum composite electrode according to claim 2, characterized in that: The intermediate transition layer includes a first part covering the outer surface of the titanium mesh layer, a second part covering the mesh surface of the titanium mesh layer, and a third part covering the outer surface of the titanium layer corresponding to the mesh of the titanium mesh layer. The oxide layer covers the outer surfaces of the first part, the second part and the third part.
4. The titanium-clad aluminum composite electrode according to claim 2, characterized in that: The intermediate transition layer is a metal oxide coating of tin and antimony or a metal oxide coating of titanium and tantalum, and the oxide layer is a lead dioxide electroplating layer or a manganese dioxide electroplating layer.
5. The titanium-clad aluminum composite electrode according to claim 1, characterized in that: The titanium-clad aluminum composite electrode is in the shape of a bar as a whole, and its cross section is waist-shaped, elliptical or circular.
6. The titanium-clad aluminum composite electrode according to claim 2, characterized in that: The thickness of the titanium layer is 0.5-2 mm, the thickness of the titanium mesh layer is 0.3-1 mm, the thickness of the intermediate transition layer is 0.3-1.2 mm, and the thickness of the oxide layer is 0.3-1.2 mm.
7. The titanium-clad aluminum composite electrode according to claim 1, characterized in that: The aluminum core layer is a solid structure layer made of aluminum or aluminum alloy, the titanium layer is an annular solid structure layer made of titanium or titanium alloy, and the titanium mesh layer is an annular mesh structure layer made of titanium or titanium alloy.
8. The titanium-clad aluminum composite electrode according to claim 1, characterized in that: The inner surface of the titanium layer is tightly fitted to the outer surface of the aluminum core layer, and the inner surface of the titanium mesh layer is also tightly fitted to the outer surface of the titanium layer.
9. An electrode device, comprising a conductive beam, a connecting beam and a plurality of electrode strips, wherein the conductive beam and the connecting beam are arranged in parallel and spaced apart in the vertical direction, the plurality of electrode strips are arranged side by side and spaced apart between the conductive beam and the connecting beam in the horizontal direction, and the upper and lower ends of each electrode strip are fixedly connected to the conductive beam and the connecting beam respectively, characterized in that: Each electrode strip adopts the titanium-clad aluminum composite electrode described in any one of claims 1-8.
10. An electrode device according to claim 9, characterized in that: Each electrode strip is composed of a main body and an upper end portion located at the upper end of the main body. The main body of each electrode strip adopts the titanium-clad aluminum composite electrode, and the upper end portion of each electrode strip only includes an aluminum core layer and a titanium layer coated on the outer surface of the aluminum core layer. The conductive beam includes a conductive copper rod and a cast lead layer coated on the outer surface of the conductive copper rod. The upper end portion of each electrode strip passes through the cast lead layer and is connected to the conductive copper rod.