Sacrificial anode electrochemical performance testing device

Abstract

The invention provides a sacrificial anode electrochemical performance test device, which comprises: a test container which is a cylindrical container made of a transparent material and provided with a cover plate, and the upper end of the cylindrical container is open; the auxiliary cathode is a stainless steel cylinder with two open ends and is suspended in the middle of the test container; one end of the cathode connecting rod is fixedly connected to the outer wall of the auxiliary cathode, and the other end penetrates out of the cover plate to be connected with a wire during test; tapping a screw hole at one end of the anode sample according to test standard requirements; one end of the anode connecting rod is provided with an external thread matched with the anode sample screw hole, the middle section of the anode connecting rod can be connected to the cover plate, and the other end extends out of the cover plate to be connected with an electric wire during test. The auxiliary cathode disclosed by the invention adopts a suspension placement mode, and can be well centered at a position which is more than 10mm away from the water surface and the bottom surface; a hole is formed in the center of the cover plate, and the cover plate is fixed and suspended, so that the anode sample can be positioned and suspended in the center of the cathode ring.

Description

Technical Field

[0001] The invention belongs to the field of corrosion cathode technical protection, and in particular relates to a sacrificial anode electrochemical performance test device. Background Art

[0002] In the field of corrosion protection, the sacrificial anode provides cathode current to the protected metal through its own consumption, causing it to undergo cathode polarization, inhibiting or slowing down the occurrence of corrosion, and protecting the protected metal body. Since the electrochemical behavior of the sacrificial anode directly affects the protective effect on the metal, it is necessary to evaluate its stability and reliability by testing the electrochemical performance of the sacrificial anode. The circuit diagram of the test device listed in the corresponding testing standard is as follows: Figure 1 shown.

[0003] However, the existing test device has the following problems: the auxiliary cathode cannot be well centered at a position more than 10 mm away from the water surface and the bottom; the auxiliary cathode and sacrificial anode samples cannot be well connected to the wires; the anode sample cannot be positioned and suspended in the center of the cathode ring; the cleanliness of the solution in the test container cannot be guaranteed during the test period. Summary of the invention

[0004] In order to solve the technical problems in the prior art, the present invention provides a sacrificial anode electrochemical performance test device, comprising:

[0005] The test container is a cylindrical container made of transparent material and open at the upper end, and the test container is provided with a cover;

[0006] The auxiliary cathode is a stainless steel cylinder with both ends open and is centrally suspended in the test container;

[0007] A cathode connecting rod, one end of which is fixedly connected to the outer wall of the auxiliary cathode and the other end of which passes through the cover plate for connecting electric wires during testing;

[0008] Anode specimen, one end of which has a screw hole tapped according to the test standard requirements;

[0009] The anode connecting rod has an external thread formed on one end to match the screw hole of the anode sample. The middle section of the anode connecting rod can be connected to the cover plate, and the other end extends out of the cover plate for connecting wires during testing.

[0010] Furthermore, the cover plate of the test container is provided with a central hole, through which the anode connecting rod passes and the position of the anode connecting rod is fixed by a locking member.

[0011] Furthermore, the diameter of the middle section of the anode connecting rod is larger than that of the anode connecting rod, a threaded section is formed on the side wall of the middle section of the anode connecting rod, and a nut matching the threaded section is provided in the center hole.

[0012] Furthermore, a first hole is formed on the cover plate of the test container at a position avoiding the central hole, and the first hole is used for the cathode connecting rod to pass through.

[0013] Furthermore, a second hole with a cover is provided on the cover plate of the test container, and the second hole is used to regularly measure the potential of the test solution in the test container.

[0014] Furthermore, a plurality of through holes are provided on the side wall of the auxiliary cathode near the upper edge, and the plurality of through holes are located on the same cross section of the auxiliary cathode, and the connecting lines of the plurality of through holes form a regular polygon.

[0015] Furthermore, the auxiliary cathode is centrally suspended in the test container by a hook, and the hook is a double-ended hook, the lower end of the hook extends into the through hole on the auxiliary cathode, and the upper end of the hook is hooked on the upper edge of the test container.

[0016] Furthermore, the ends of the cathode connecting rod and the anode connecting rod away from the corresponding electrodes are both provided with nuts of matching sizes, and the wires are connected by thread spinning.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The auxiliary cathode of the present invention is suspended and placed in a manner so that it can be well centered at a position more than 10 mm away from the water surface and the bottom surface; the connection between the wires and the test device adopts a threaded spinning type, which can ensure that the auxiliary cathode and the sacrificial anode samples can be well connected to the wires; by opening a hole in the center of the cover plate and suspending after fixing, it can be ensured that the anode sample can be positioned and suspended in the center of the cathode ring; a container cover plate with a movable opening is provided to ensure the cleanliness of the solution in the test container during the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the working state of the present invention;

[0020] Figure 2 is a schematic diagram of the auxiliary cathode of the present invention;

[0021] Figure 3 is a schematic diagram of the hook of the present invention;

[0022] Figure 4 is a schematic diagram of a cover plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the anode connecting rod of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figure 1 , the present application proposes a sacrificial anode electrochemical performance test device, wherein:

[0026] 1. Test container: glassware or corrosion-resistant plastic materials such as PP and PC can be used.

[0027] 2. Auxiliary cathode: For the placement of the auxiliary cathode, a hanging type is used. The auxiliary cathode can be well centered in the test container. A hook of appropriate length is made according to the size of the test container, and the auxiliary cathode can be hung at a position more than 10mm above the water surface and the bottom surface. The internal and external working area can be selected to be not less than 840cm 2 A stainless steel cylinder with a threaded cathode connecting rod welded on one side for connecting wires during testing; three holes are opened in an equilateral triangle near the upper edge of the cylinder (to ensure consistent hanging distance) for hanging purposes.

[0028] 3. Anode sample: tap a screw hole at one end according to the test standard requirements, and adjust the hole diameter and hole depth according to the standard.

[0029] 4. Hook: used to hang the cathode, one end of the hook is inserted into the hole at the upper end of the auxiliary cathode, hooking the auxiliary cathode, and the other end is hooked on the upper edge of the test container. Corrosion-resistant stainless steel materials can be selected.

[0030] 5. Cover with holes: The cover helps to keep the test solution clean during a longer test period.

[0031] One side of the cover plate is provided with a hole according to the size of the auxiliary cathode for inserting a connecting rod of the auxiliary cathode.

[0032] The other side of the cover has a movable opening to facilitate the measurement of potential during the test cycle.

[0033] The center of the cover plate is opened to facilitate fixing the anode sample through the anode connecting rod, which can ensure that the anode sample can be positioned and suspended in the center of the cathode ring.

[0034] 6. Nut: plays a good fixing role.

[0035] 7. Anode connecting rod: The upper end is connected to the wire with a nut, and the middle end can be fixed to the cover plate in both directions with a nut. The lower end is tapped with an external thread that matches the anode threaded hole to connect the anode sample.

[0036] All the above threaded connecting rods are equipped with nuts of matching size, and the thread spinning can ensure that the auxiliary cathode and sacrificial anode samples can be well connected to the wires.

[0037] Specifically, refer to Figure 2 , the structure of the auxiliary cathode is:

[0038] Three holes are made in the shape of an equilateral triangle near the upper edge of the cylinder for hanging;

[0039] The upper end of the cathode connecting rod is used to connect the threads of the wire;

[0040] Hook: One end is inserted into the hole at the upper end of the auxiliary cathode to hook the auxiliary cathode, and the other end is hooked on the upper edge of the test container.

[0041] Specifically, refer to Figure 3 , the structure of the cover is:

[0042] The non-center hole is used to insert the cathode connecting rod, and the hole diameter is slightly larger than the diameter of the cathode connecting rod;

[0043] The center hole has a nut embedded inside, which is used to insert and fix the anode connecting rod, and the hole diameter is consistent with the diameter of the middle section of the anode connecting rod;

[0044] Covered well, rectangular hole, for periodic measurement of potential, dimensions can be determined according to the reference electrode used.

[0045] Specifically, refer to Figure 4 , the structure of the anode connecting rod is:

[0046] The upper threaded section is used to screw the nut to connect the wires;

[0047] The middle threaded section is used to fix the connecting rod to the container cover through a nut;

[0048] The threaded section at the lower end matches the anode specimen screw hole diameter and is used to connect the anode.

[0049] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A sacrificial anode electrochemical performance test device, characterized in that: include: The test container is a cylindrical container made of transparent material and open at the upper end, and the test container is provided with a cover; The auxiliary cathode is a stainless steel cylinder with both ends open and is centrally suspended in the test container; A cathode connecting rod, one end of which is fixedly connected to the outer wall of the auxiliary cathode and the other end of which passes through the cover plate for connecting electric wires during testing; Anode specimen, one end of which has a screw hole tapped according to the test standard requirements; The anode connecting rod has an external thread formed on one end to match the screw hole of the anode sample. The middle section of the anode connecting rod can be connected to the cover plate, and the other end extends out of the cover plate for connecting wires during testing.

2. The device according to claim 1, characterized in that: The cover plate of the test container is provided with a central hole, through which the anode connecting rod passes and the position of the anode connecting rod is fixed by a locking piece.

3. The device according to claim 2, characterized in that: The diameter of the middle section of the anode connecting rod is larger than that of the anode connecting rod. A threaded section is formed on the side wall of the middle section of the anode connecting rod. A nut matching the threaded section is arranged in the center hole.

4. The device according to claim 2, characterized in that: A first hole is formed on the cover plate of the test container at a position avoiding the central hole, and the first hole is used for the cathode connecting rod to pass through.

5. The device according to claim 1, characterized in that: The cover plate of the test container is also provided with a second hole with a cover, and the second hole is used to regularly measure the potential of the test solution in the test container.

6. The device according to claim 1, characterized in that: A plurality of through holes are provided on the side wall of the auxiliary cathode near the upper edge. The plurality of through holes are located on the same cross section of the auxiliary cathode, and the connecting lines of the plurality of through holes form a regular polygon.

7. The device according to claim 6, characterized in that: The auxiliary cathode is centrally suspended in the test container by a hook, wherein the hook is a double-ended hook, the lower end of the hook extends into the through hole on the auxiliary cathode, and the upper end of the hook is hooked on the upper edge of the test container.

8. The device according to any one of claims 1 to 7, characterized in that: The cathode connecting rod and the anode connecting rod are both provided with nuts with matching sizes at one end away from the corresponding electrode, and the electric wires are connected by thread spinning.

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