MMO tubular anode

Abstract

The utility model provides an MMO tubular anode. The MMO tubular anode comprises a base body and a mixed metal oxide coating arranged on the outer surface of the base body. The base body comprises a body and conductive parts arranged at the two ends of the body respectively, the two conductive parts are fixedly connected with the body through the two connecting flanges respectively, the body is of a tubular structure with a cavity, and a mixed metal oxide coating is further arranged on the outer surface of the body. And the mixed metal oxide coating is set as a ruthenium-iridium IR-RU coating structure. According to the MMO tubular anode provided by the utility model, the platinum or noble metal oxide is coated on the titanium base material or the niobium base material, so that higher protection current can pass through, the service life can be as long as tens of years, and meanwhile, the titanium base material is easily processed into various shapes, so that the protection effect is favorably improved.

Description

Technical Field

[0001] This utility model belongs to the field of anode structure technology and relates to an MMO tubular anode. Background Technology

[0002] An impressed current cathodic protection system consists of a DC power supply, an anode, and a reference electrode. The auxiliary anode provides a circuit for the protective current and is a crucial component of the system. Depending on the chloride ion content in the corrosive medium, the anode primarily undergoes oxygen evolution or chloride evolution reactions, or both. To ensure long-term stable operation of the system, the auxiliary anode requires excellent conductivity, corrosion resistance, and a long service life. It also requires high mechanical strength and good machinability. Traditional graphite or high-silicon cast iron anodes often cannot meet these requirements.

[0003] In recent years, MMO anodes have been widely used in impressed current cathodic protection systems. Utility Model Content

[0004] The purpose of this invention is to provide an MMO tubular anode, comprising a substrate and a mixed metal oxide coating disposed on the outer surface of the substrate.

[0005] The substrate includes a body and conductive parts respectively disposed at both ends of the body. The two conductive parts are fixed to the body through two connecting flanges. The body is configured as a tubular structure with a cavity, and a mixed metal oxide coating is also provided on the outer surface of the body. The mixed metal oxide coating is configured as a ruthenium-iridium IR-RU coating structure.

[0006] Optionally, the substrate is made of Gr2 grade titanium; or it is made according to ASTM B338.

[0007] Optionally, the thickness of the hybrid metal oxide coating is set to be no less than 14 micrometers.

[0008] Optionally, the connection between the connecting flange and the body, as well as the connection between the conductive part and the connecting flange, are all fixed by argon arc welding.

[0009] Optionally, the single-piece connecting flange is also provided with mounting holes, wherein at least two mounting holes are symmetrically arranged along the conductive part, and the at least two mounting holes can be used to install cables and / or exhaust pipes respectively according to actual needs.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) The MMO tubular anode provided by this utility model can be coated with platinum or precious metal oxide on a titanium substrate or niobium substrate. It can pass through a high protection current and has a service life of up to several decades. At the same time, the titanium substrate is easy to process into various shapes, which is beneficial to improving the protection effect.

[0012] (2) The MMO anode uses titanium or niobium as the substrate and is coated with a multi-element noble metal oxide coating designed and developed for cathodic protection applications. It is especially suitable for working conditions with both chlorine evolution and oxygen evolution reactions. By setting a special coating formula and strict production process, it gives the coating and the substrate good mechanical adhesion and chemical bonding.

[0013] (3) MMO-coated anodes can withstand high current densities (over 750 A / m² in seawater environments). The anode design life can be up to 20 years or longer, depending on user requirements and actual needs. Coated anodes can be used in all cathodic protection systems, and the company can provide anodes of various sizes and shapes as needed, such as rods, wires, plates, meshes, and combinations thereof.

[0014] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 This is a front cross-sectional schematic diagram of an MMO tubular anode according to an embodiment of this utility model. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model clearer and easier to understand, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of this utility model are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of this utility model; the "several" mentioned in this utility model are not limited to the specific number shown in the examples in the drawings; the directions or positional relationships indicated by "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "middle" mentioned in this utility model are all based on the directions or positional relationships shown in the accompanying drawings of this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on this utility model.

[0018] Example:

[0019] See Figure 1 As shown, the MMO tubular anode provided by this utility model includes a substrate and a mixed metal oxide coating disposed on the outer surface of the substrate.

[0020] The substrate has good corrosion resistance, high strength and excellent conductivity, providing a stable support structure for the MMO tubular anode; specifically, the substrate includes a body 1 and conductive parts 2 respectively disposed at both ends of the body 1. The two conductive parts 2 are respectively fixed to the body 1 through two connecting flanges 3. The body 1 is configured as a tubular structure with a cavity, and a mixed metal oxide coating is also provided on the outer surface of the body 1. The mixed metal oxide coating is configured as a ruthenium-iridium IR-RU coating structure.

[0021] Optionally, the substrate is made of Gr2 grade titanium; or it is made according to ASTM B338.

[0022] Optionally, the thickness of the hybrid metal oxide coating can be set to 5-14 micrometers.

[0023] Preferably, the connection between the connecting flange 3 and the body 1, as well as the connection between the conductive part 2 and the connecting flange 3, are all fixed by argon arc welding.

[0024] Preferably, the single-piece connecting flange 3 is also provided with mounting holes (not shown). Preferably, there are at least two mounting holes arranged symmetrically along the conductive part 2. The at least two mounting holes can be used to install cables and / or exhaust pipes according to actual needs.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tubular anode for MMO, characterized in that, Includes a substrate and a mixed metal oxide coating disposed on the outer surface of the substrate (3); The substrate includes a body (1) and conductive parts (2) respectively disposed at both ends of the body (1). The two conductive parts (2) are fixed to the body (1) through two connecting flanges (3). The body (1) is configured as a tubular structure with a cavity, and a mixed metal oxide coating is also provided on the outer surface of the body (1). The mixed metal oxide coating is configured as a ruthenium-iridium IR-RU coating structure.

2. The MMO tubular anode according to claim 1, characterized in that, The substrate is made of Gr2 grade titanium; or it is made according to ASTM B338.

3. The MMO tubular anode according to claim 1, characterized in that, The thickness of the hybrid metal oxide coating is set to 5-14 micrometers.

4. The MMO tubular anode according to any one of claims 1-3, characterized in that, The connecting flange (3) and the body (1) are fixed together by argon arc welding, as are the conductive part (2) and the connecting flange (3).

5. The MMO tubular anode according to claim 4, characterized in that, The single-piece connecting flange (3) is also provided with mounting holes. The mounting holes are provided with at least two pieces arranged symmetrically along the conductive part (2). The at least two mounting holes can be used to install cables and / or exhaust pipes according to actual needs.

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