CN-224212770-U - High-salt high-humidity long-life noble metal oxide coating titanium anode

Abstract

The utility model discloses a high-salt high-humidity long-life noble metal oxide coating titanium anode which comprises a titanium substrate, an intermediate layer metal platinum and a noble metal oxide coating, wherein the noble metal oxide coating is an iridium tantalum oxide coating. According to the utility model, the metal platinum is added between the anode substrate and the iridium tantalum oxide coating, so that the anode has good current efficiency and lower oxygen evolution potential in a high-salt and high-humidity soil environment, the service life of the anode is obviously prolonged, the comprehensive performance of the anode is obviously improved, and the anode is suitable for protecting an anode land bed and the like by burying a pipeline and an external current cathode of a storage tank in the high-salt and high-humidity soil environment.

Inventors

• HU XIAOPING
• MA CHANGJIANG
• SUN CHANGFU
• ZHANG YUHAO
• WANG YU

Assignees

• 青岛山科海洋环境工程有限公司

Dates

Publication Date

20260508

Application Date

20250110

Claims (4)

1. 1. The high-salt high-humidity long-life noble metal oxide coated titanium anode is characterized by comprising a titanium substrate, an intermediate layer metal platinum and a noble metal oxide coating; The noble metal oxide coating is an iridium tantalum oxide coating; the thickness of the intermediate layer metal platinum is 1um.
2. 2. The high salt, high humidity long life noble metal oxide coated titanium anode of claim 1, wherein said titanium substrate surface is coated with an intermediate layer metal platinum, said intermediate layer metal platinum surface is coated with a noble metal oxide coating.
3. 3. The high salt, high humidity long life noble metal oxide coated titanium anode of claim 1, wherein said iridium tantalum oxide coating loading is up to 3g/m2.
4. 4. The high salt high humidity long life noble metal oxide coated titanium anode of claim 1, wherein said titanium substrate is a tubular Φ25×1000mm TA2 commercial pure titanium tube.

Description

High-salt high-humidity long-life noble metal oxide coating titanium anode Technical Field The utility model relates to the field of electrochemistry, in particular to a high-salt high-humidity long-life noble metal oxide coating titanium anode. Background The mixed metal oxide anode is characterized in that a layer of electrocatalytically active metal oxide (oxides of metals such as ruthenium, iridium and titanium) is coated on a titanium base material (ASTMB 265 grade one titanium), the coating can improve the conductivity of the anode, and the coating can be suitable for different environments, such as seawater, fresh water and soil mediums, by adjusting the components of the oxide layer, the mixed metal oxide tubular anode has the advantages of light weight, good conductivity, high cost performance, strong corrosion resistance and the like, and is the most promising auxiliary anode material for replacing high-silicon cast iron anodes in the current cathodic protection. Conventional mixed metal oxide anodes, however, often suffer from voltage decay during use. When the soil resistivity is low or the corrosion-resistant layer of the protected structure is poor, the voltage of the anode is gradually reduced, so that the protection effect is reduced. Particularly, under the condition of low soil resistivity, the consumption speed of the anode near the electrifying point is increased, and the anode can be early failed, so that a new anode needs to be replaced, and the maintenance cost and difficulty are increased. Furthermore, mixed metal oxide anode coatings also present chemical and electrochemical stability problems during long term use. Therefore, there is a need in the field of cathodic protection for a mixed metal oxide anode suitable for use in various soil environments, particularly in high-salt, high-water soil environments, which can be used for a long period of time and has stable chemical and electrochemical properties. Disclosure of utility model The utility model aims to provide a high-salt high-humidity long-life noble metal oxide coating titanium anode so as to solve the problems in the prior art. The technical scheme is that the high-salt high-humidity long-life noble metal oxide coating titanium anode comprises a titanium substrate, an intermediate layer metal platinum and a noble metal oxide coating, wherein the noble metal oxide coating is an iridium tantalum oxide coating. Preferably, the surface of the titanium substrate is coated with an intermediate layer metal platinum, and the surface of the intermediate layer metal platinum is coated with a noble metal oxide coating. Preferably, the thickness of the intermediate layer metal platinum is 1um. Preferably, the iridium tantalum oxide coating comprises iridium dioxide and tantalum pentoxide in a molar ratio of 70:30. Preferably, the iridium tantalum oxide coating loading is up to 3g/m2. Preferably, the titanium substrate is a TA2 industrial pure titanium tube with a tubular diameter of 25 mm x 1000 mm. Compared with the prior art, the utility model has the beneficial effects that: (1) According to the utility model, the metal platinum is added between the anode substrate and the iridium tantalum oxide coating, so that the anode has good current efficiency and lower oxygen evolution potential in a high-salt and high-humidity soil environment, the service life of the anode is obviously prolonged, the comprehensive performance of the anode is obviously improved, and the anode is suitable for protecting an anode land bed and the like by burying a pipeline and an external current cathode of a storage tank in the high-salt and high-humidity soil environment. Drawings FIG. 1 is a schematic structural view of a noble metal oxide coated titanium anode with an intermediate layer of the present utility model; In the figure, a 1-titanium substrate, 2-interlayer metal platinum and a 3-noble metal oxide coating are shown. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Referring to fig. 1, a high-salt high-humidity long-life noble metal oxide coated titanium anode comprises a titanium substrate 1, an intermediate layer metal platinum 2 and a noble metal oxide coating 3, wherein the noble metal oxide coating 3 is an iridium tantalum oxide coating. The surface of the titanium substrate 1 is coated with an intermediate layer metal platinum 2, and the surface of the intermediate layer metal platinum 2 is coated with a noble metal oxide coating 3. By adding metal platinum between the anode m