Device for testing electrochemical performance of sacrificial anode after service

Abstract

The utility model discloses a device for testing the electrochemical performance of a sacrificial anode after service, which belongs to the technical field of corrosion protection of ships and maritime work equipment and comprises a positioning base, a working electrode is assembled above the positioning base and pressed at the bottom of an experimental cylinder, an upper positioning cover plate is arranged at the top of the experimental cylinder, and a lower positioning cover plate is arranged at the bottom of the experimental cylinder. A rubber plug is mounted in the middle of the upper positioning cover plate in an embedded manner, and a reference electrode and a platinum sheet electrode are mounted on one side of the middle of the rubber plug in a penetrating manner. The device for testing the electrochemical performance of the sacrificial anode after service can be used for carrying out an effective electrochemical test on a plate-shaped material after service, is simple, convenient, efficient and accurate, solves the problem that a sample is difficult to cut and prepare in an electrochemical experiment of the sacrificial anode, reduces unnecessary errors, improves the accuracy of the experiment, and is suitable for popularization and application. And effective electrochemical testing can be carried out on a corrosion product rust layer which is generated by the sacrificial anode and is difficult to fall off, and the structure is simple and ingenious in design, convenient and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrosion protection of ships and marine engineering equipment, and specifically is a device for testing the electrochemical performance of sacrificial anodes after service. Background Art

[0002] Sacrificial anode is one of the effective ways to solve atmospheric corrosion, seawater corrosion, and soil environmental corrosion of metal materials. The sacrificial anode cathodic protection method has the advantages of easy installation, no need for external power supply, and low price. It is widely used in nuclear power, oil and gas pipelines, ships, and marine equipment. However, the performance test and evaluation of sacrificial anodes after serving in corrosive environments are insufficient, resulting in the inability to accurately predict metal corrosion failure. Therefore, it is necessary to conduct electrochemical performance tests on sacrificial anodes after serving in extremely harsh environments to accurately evaluate the performance indicators and service safety life of sacrificial anodes.

[0003] The traditional electrochemical test method for sacrificial anodes after service of ships and offshore equipment is to drill holes in the sacrificial anode material after service, leaving a working surface, and use insulating tape or organic silicone to encapsulate it. The shortcomings are:

[0004] 1. It is difficult to accurately encapsulate the working surface of the sample, resulting in test errors;

[0005] 2. Requires complicated processes such as drilling and cutting samples;

[0006] 3. For the pre-service encapsulated samples, it is easy to cause crevice corrosion in the actual field, which affects the experimental results, and the pre-service encapsulated samples waste materials;

[0007] In summary, it is of great significance to study a new electrochemical performance testing device for sacrificial anodes after service to solve the above problems. Utility Model Content

[0008] 1. Technical issues to be resolved

[0009] In order to overcome the above-mentioned defects of the prior art, the utility model provides a device for testing the electrochemical properties of sacrificial anodes after service, which solves the problem that the traditional method for testing the electrochemical properties of sacrificial anodes after service of ships and marine engineering equipment is to drill holes in the sacrificial anode material after service to leave a working surface and use insulating tape or organic silicone to encapsulate it, which makes it difficult to accurately encapsulate the working surface of the sample, resulting in test errors; it requires complicated processes such as drilling and cutting samples; and it is easy to cause crevice corrosion in the actual field layout of the packaged samples before service, which affects the experimental results, and the packaging samples before service waste materials.

[0010] (II) Technical solution

[0011] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for testing the electrochemical properties of a sacrificial anode after service, comprising a positioning base, a working electrode is mounted on the top of the positioning base, the working electrode is pressed onto the bottom of an experimental cylinder, an upper positioning cover is provided on the top of the experimental cylinder, a rubber plug is embedded in the middle of the upper positioning cover, a reference electrode and a platinum sheet electrode are respectively penetrated and installed on one side of the middle of the rubber plug, and the reference electrode and the platinum sheet electrode extend into the experimental cylinder.

[0012] As a further solution of the utility model: bolts are penetrated at the four corners of the positioning base, and the upper threads of the bolts cooperate with nuts to fix the upper positioning cover plate on the top of the experimental cylinder.

[0013] As a further solution of the utility model: a rubber gasket is provided between the upper positioning cover plate and the test cylinder.

[0014] As a further solution of the utility model: a circular groove is opened at the bottom of the experimental cylinder, a rubber O-type sealing ring is embedded in the circular groove, and the rubber O-type sealing ring is adhered to the bottom of the experimental cylinder through Kraft organic silicone.

[0015] As a further solution of the utility model: the reference electrode and the platinum sheet electrode include a wire and a special electrode clamp.

[0016] As a further solution of the utility model: the dedicated electrode clamp includes a terminal post, an electrode rod and a terminal clamp.

[0017] As a further solution of the utility model: the special electrode clamp terminal is made of gold-plated material, the electrode rod is made of high-quality polytetrafluoroethylene material, and the electrode clamp is made of replaceable stainless steel material.

[0018] As a further solution of the utility model: the material of the experimental cylinder, the positioning base and the upper positioning cover plate is polymethyl methacrylate.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the beneficial effects of the utility model are: the device for testing the electrochemical properties of sacrificial anodes after service can perform effective electrochemical tests on plate-shaped materials after service, is simple, convenient, efficient and accurate, solves the problem of difficulty in cutting and preparing samples for electrochemical experiments on sacrificial anodes, reduces unnecessary errors, improves the accuracy of the experiment, and can perform effective electrochemical tests on the rust layer of corrosion products that are difficult to fall off produced by sacrificial anodes. The structural design is simple and ingenious, convenient and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a three-dimensional structural schematic diagram of a device for testing the electrochemical performance of a sacrificial anode after service according to the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the reference electrode and the reference electrode in the electrochemical performance testing device of the sacrificial anode after service of the utility model;

[0023] Figure 3 It is a structural schematic diagram of an embodiment of a device for testing the electrochemical performance of a sacrificial anode after service of the utility model;

[0024] In the figure: 1. positioning base; 2. working electrode; 3. rubber O-ring; 4. experimental cylinder; 5. rubber gasket; 6. upper positioning cover; 7. nut; 8. bolt; 9. platinum electrode; 10. reference electrode; 11. rubber stopper. DETAILED DESCRIPTION

[0025] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0026] like Figure 1-3 As shown, the utility model provides a technical solution: a device for testing the electrochemical performance of a sacrificial anode after service, comprising a positioning base 1, bolts 8 are penetrated at the four corners of the positioning base 1, and the upper threads of the bolts 8 cooperate with nuts 7 to fix the upper positioning cover plate 6 to the top of the experimental cylinder 4, and the nuts 7 and the bolts 8 are threaded together to play the role of assembling the upper positioning cover plate 6 on the experimental cylinder 4, and a rubber gasket 5 is arranged between the upper positioning cover plate 6 and the experimental cylinder 4, and the rubber gasket 5 can play a role in maintaining good sealing of the top of the experimental cylinder 4, and a working electrode 2 is arranged above the positioning base 1, and the working electrode 2 is pressed on the bottom of the experimental cylinder 4, and a circular groove is opened at the bottom of the experimental cylinder 4, and a rubber O-type sealing ring 3 is embedded in the circular groove, and the rubber O-type sealing ring 3 can ensure the experimental sealing effect, and the rubber O-type sealing ring 3 is passed through Kraft organic silicone is pasted to the bottom of the experimental cylinder 4, and an upper positioning cover plate 6 is provided on the top of the experimental cylinder 4. A rubber plug 11 is embedded in the middle of the upper positioning cover plate 6, and a reference electrode 10 and a platinum electrode 9 are respectively installed on one side of the middle of the rubber plug 11. The reference electrode 10 and the platinum electrode 9 include wires and special electrode clamps. The special electrode clamps include terminals, electrode rods and terminal clamps. The terminals of the special electrode clamps are gold-plated materials, the electrode rods are made of high-quality polytetrafluoroethylene materials, and the electrode clamps are replaceable stainless steel materials. The reference electrode 10 and the platinum electrode 9 extend into the experimental cylinder 4. The reference electrode 10 is made of saturated potassium chloride or Ag / AgCl, and the platinum electrode 9 is made of platinum or other inert electrodes. The materials of the experimental cylinder 4, the positioning base 1 and the upper positioning cover plate 6 are polymethyl methacrylate.

[0027] like Figure 2As shown, the sacrificial anode plate sample is on the left. The sacrificial anode plate sample is fixed to the device. The installation sequence is as follows: the sacrificial anode plate sample is placed between the positioning base 1 and the experimental cylinder 4, a rubber O-ring 3 is placed at the opening below the experimental cylinder 4, four bolts 8 pass through the reserved holes of the positioning base 1 and the upper positioning cover 6, and the nuts 7 are matched with the bolts 8 so that the upper positioning cover 6 presses the experimental cylinder 4, so that the experimental cylinder 4 and the sacrificial anode plate sample are fixed. Specifically, in order to simulate different experimental environments, different corrosive media can be added to the installed and fixed experimental cylinder 4 as needed. The corrosive media include salt water and seawater. The working electrode 2 and the reference electrode 10 are fixed by the rubber stopper 11 and the upper opening of the experimental cylinder 4.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A device for testing the electrochemical performance of a sacrificial anode after service, comprising a positioning base (1), characterized in that: A working electrode (2) is mounted on the top of the positioning base (1), and the working electrode (2) is pressed onto the bottom of the experimental cylinder (4). An upper positioning cover plate (6) is disposed on the top of the experimental cylinder (4), and a rubber plug (11) is embedded in the middle of the upper positioning cover plate (6). A reference electrode (10) and a platinum sheet electrode (9) are respectively installed on one side of the middle of the rubber plug (11), and the reference electrode (10) and the platinum sheet electrode (9) extend into the experimental cylinder (4).

2. The electrochemical performance testing device for a sacrificial anode after service according to claim 1, characterized in that: Bolts (8) are inserted through the four corners of the positioning base (1), and the upper threads of the bolts (8) cooperate with nuts (7) to fix the upper positioning cover plate (6) on the top of the experimental cylinder (4).

3. The electrochemical performance testing device of a sacrificial anode after service according to claim 1, characterized in that: A rubber gasket (5) is provided between the upper positioning cover plate (6) and the test cylinder (4).

4. The electrochemical performance testing device for a sacrificial anode after service according to claim 1, characterized in that: A circular groove is provided at the bottom of the experimental cylinder (4), a rubber O-type sealing ring (3) is embedded in the circular groove, and the rubber O-type sealing ring (3) is adhered to the bottom of the experimental cylinder (4) through Kraft organic silicone.

5. The electrochemical performance testing device for a sacrificial anode after service according to claim 1, characterized in that: The reference electrode (10) and the platinum sheet electrode (9) include a wire and a dedicated electrode clamp.

6. The electrochemical performance testing device for a sacrificial anode after service according to claim 5, characterized in that: The special electrode clamp includes a terminal post, an electrode rod and a terminal clamp.

7. The electrochemical performance testing device for a sacrificial anode after service according to claim 6, characterized in that: The terminal of the special electrode chuck is made of gold-plated material, the electrode rod is made of high-quality polytetrafluoroethylene material, and the electrode chuck is made of replaceable stainless steel material.

8. The electrochemical performance testing device for a sacrificial anode after service according to claim 1, characterized in that: The material of the experimental cylinder (4), the positioning base (1) and the upper positioning cover plate (6) is polymethyl methacrylate.

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