Electrochemical corrosion sample packaging device and method

Abstract

The present invention relates to an electrochemical corrosion sample packaging device, comprising an upper clamp with a certain weight, an intermediate outer mold for installing a test sample and a lower clamp, wherein the intermediate outer mold is located between the upper clamp and the lower clamp; the upper clamp is provided with a wire fixing ring for fixing the wire, and the lower clamp is provided with a metal wire and the metal wire extends to the outside of the lower clamp; the test sample is installed at the position corresponding to the wire fixing ring and is arranged in contact with the wire fixing ring and the metal wire. The packaging device has a simple and ingenious structure and is easy to carry. The sample wire can be adjusted later to ensure the conductivity during the test, thereby ensuring the accuracy of the test results, which is conducive to the promotion and application of the above packaging device in the field of electrochemical corrosion test technology. A convenient electrochemical corrosion experiment sample clamping method, applied to the above electrochemical corrosion sample packaging device, also has the advantage of ensuring the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of electrochemical corrosion testing, in particular to an electrochemical corrosion sample packaging device and method. Background Art

[0002] Electrochemical corrosion is a deterioration or destruction process caused by electrochemical reactions between metals and electrolytes. The main reason is that the unevenness of metal structures or the concentration difference in the electrolyte (such as oxygen) leads to different potentials and forms a corrosion galvanic cell. Charge transfer means that the part with lower potential is prone to lose electrons and suffers from oxidative corrosion, which is called the anode; while the part with higher potential is the cathode, which transfers the electrons flowing from the anode to the reduced substances in the electrolyte, causing a reduction reaction. Therefore, the cathode only plays an electron transfer role and is not corroded. Electrochemical corrosion consists of three basic processes: anode reaction, cathode reaction and charge transfer.

[0003] Electrochemical corrosion experiment is a very important experiment, which is widely used in the evaluation of material corrosion resistance and the determination of various key parameters. However, in the current electrochemical corrosion test process, the packaging of test samples is not very convenient and fast. Obtaining reliable samples requires cumbersome steps and some high-power equipment, which is not conducive to processing smaller electrochemical samples.

[0004] The existing electrochemical sample packaging methods are inefficient and highly equipment-dependent (thermal and electrical equipment). The simple pouring packaging in the laboratory at this stage often has problems such as exposure of non-measuring surfaces due to packaging eccentricity and non-conductivity of wire connections. This will greatly reduce the accuracy of the measurement results and waste manpower and material resources during repeated sealing, affecting the operator's experience and hindering the promotion and application of the above method in the field of electrochemical corrosion test technology. Summary of the invention

[0005] In order to overcome the defects in the above-mentioned prior art, the first invention purpose of the present invention is to provide an electrochemical corrosion sample packaging device, which has a simple and ingenious structure and is easy to carry. The sample wire can be adjusted later to ensure the conductivity during the test, thereby ensuring the accuracy of the test results, which is conducive to the promotion and application of the above-mentioned packaging device in the field of electrochemical corrosion test technology. The second invention purpose of the present invention is to provide an electrochemical corrosion sample packaging method, which is applied to the aforementioned electrochemical corrosion sample packaging device and also has the advantage of ensuring the accuracy of the test results.

[0006] The above-mentioned electrochemical corrosion sample packaging device and electrochemical corrosion sample packaging method are technically related to each other and belong to the same inventive concept.

[0007] In order to achieve the above-mentioned first invention purpose, the present invention adopts the following technical scheme: an electrochemical corrosion sample packaging device, comprising an upper clamp with a certain weight, an intermediate outer mold for installing a test sample and a lower clamp, wherein the intermediate outer mold is located between the upper clamp and the lower clamp; the upper clamp is provided with a wire fixing ring for fixing the wire, the lower clamp is provided with a metal wire and the metal wire extends outside the lower clamp; the test sample is installed corresponding to the position of the wire fixing ring and is arranged in contact with the wire fixing ring and the metal wire.

[0008] As a preferred solution of the present invention, the upper clamp is arranged in a circular ring shape, and the wire fixing ring is installed at the center position of the upper clamp through at least two elastic tensioning members in different directions.

[0009] As a preferred solution of the present invention, there are four elastic tension members, and the four elastic tension members are equidistantly arranged along the circumference of the wire fixing ring.

[0010] As a preferred solution of the present invention, the elastic tensioning member is a flexible spring.

[0011] As a preferred solution of the present invention, the outer diameter of the upper clamp is slightly smaller than the outer diameter of the middle outer mold.

[0012] As a preferred solution of the present invention, the intermediate outer mold comprises a cylindrical sleeve mold, a small circular sleeve mold and a large circular sleeve mold which can be adapted to place test specimens of different sizes. The small circular sleeve mold can be detachably mounted on the outside of the cylindrical sleeve mold, and the large circular sleeve mold can be detachably mounted on the outside of the small circular sleeve mold.

[0013] As a preferred solution of the present invention, the lower clamp is arranged in a disc shape.

[0014] As a preferred solution of the present invention, a metal gasket in contact with the metal wire and the test sample is provided on the lower fixture.

[0015] As a preferred solution of the present invention, the lower clamp is made of insulating material and is integrally formed with the metal wire and the metal gasket by casting.

[0016] In order to achieve the above second invention objective, the present invention adopts the following technical scheme: an electrochemical corrosion sample packaging method, applied to the above electrochemical corrosion sample packaging device; comprising the following steps:

[0017] Step 1: Keep the wire in contact with the test specimen by the weight of the upper fixture;

[0018] Step 2: Place the test sample in the middle outer mold, and the test sample is located on the metal wire in the lower fixture, and the metal wire and the test sample are fixed;

[0019] Step 3: After the metal wire and the test specimen are fixed, the encapsulation filler is poured;

[0020] Step 4: Before the encapsulation filler is completely solidified, use the ohmmeter of a multimeter to connect the wire in the wire fixing ring with the metal wire on the lower fixture to check whether the conductivity of the wire and the test sample is good;

[0021] Step 5: According to the test results, adjust the position of the wire or the test sample or both to complete the packaging of the test sample.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) An electrochemical corrosion sample packaging device in the present invention has a simple and ingenious structure and is easy to carry. By setting an upper clamp, an intermediate outer mold and a lower clamp, the test sample is placed in the intermediate outer mold, and the test sample is located on the metal wire in the lower clamp, and the metal wire and the test sample are fixed; after the metal wire and the test sample are fixed, the packaging filler is poured; before the packaging filler is completely solidified, the wire in the wire fixing ring and the metal wire on the lower clamp are connected with the ohmmeter of a multimeter to check whether the conductivity of the wire and the test sample is good, and according to the test result, the position of the wire or the test sample or both is adjusted to avoid the waste of materials and time caused by the poor conductivity after the packaging filler is solidified.

[0024] 2) The upper fixture in the present invention has a certain weight, and the weight of the upper fixture itself ensures good contact between the wire and the metal sample during the packaging process, thereby ensuring conductivity.

[0025] 3) The upper clamp in the present invention is arranged in a circular ring shape, and the wire fixing ring is fixed at the center position of the upper clamp by a flexible spring. On the one hand, it can effectively save the material for making the upper clamp, thereby reducing the manufacturing cost; on the other hand, the flexible spring can provide a suitable pre-pressure to the wire to ensure the fixation of the wire position, thereby ensuring the contact between the wire and the test sample.

[0026] 4) In the present invention, the outer diameter of the upper clamp is slightly smaller than the outer diameter of the middle outer mold, so that the upper clamp can be stably placed on the middle outer mold to ensure the stability of the upper clamp.

[0027] 5) The lower clamp in the present invention is made of a relatively hard polyester insulating material, wherein the metal gasket, the metal wire and the lower clamp are integrally cast to ensure integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an electrochemical corrosion sample packaging device in the present invention.

[0029] Figure numerals: 1. upper clamp; 2. elastic tensioning piece; 3. middle outer mold; 4. lower clamp; 5. metal wire; 6. metal gasket; 7. cylindrical sleeve mold; 8. small circular ring sleeve mold; 9. large circular ring sleeve mold; 10. wire fixing ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, an electrochemical corrosion sample packaging device comprises an upper fixture 1, an intermediate outer mold 3 for packaging a test sample and a lower fixture 4, wherein the intermediate outer mold 3 is located between the upper fixture 1 and the lower fixture 4. The upper fixture 1 is provided with a wire fixing ring 10 for fixing a wire, and the lower fixture 4 is provided with a metal wire 5 and the metal wire 5 extends outside the lower fixture 4; the test sample is installed corresponding to the position of the wire fixing ring 10 and is arranged in contact with the wire fixing ring 10 and the metal wire 5.

[0034] The upper clamp 1 is a solidified object with a certain weight to provide the necessary gravity loading for the middle outer mold 3 placed below it. In order to reduce the manufacturing materials of the upper clamp 1 and reduce the manufacturing cost, the upper clamp 1 is arranged in a circular ring shape, and the above-mentioned wire fixing ring 10 is arranged at the center position of the upper clamp 1, and the connection with the upper clamp 1 is achieved through at least two elastic tensioning members 2 in different directions. In this embodiment, there are four above-mentioned elastic tensioning members 2, and the four above-mentioned elastic tensioning members 2 are arranged equidistantly along the circumference of the above-mentioned wire fixing ring 10. The above-mentioned elastic tensioning member 2 can be a flexible spring, the stiffness of the flexible spring should not be too large, the elastic coefficient should be small, and it should be well connected between the upper clamp 1 and the wire fixing ring 10, so as to provide a suitable pre-pressure for the wire. The wire fixing ring 10 here should be a lightweight polyester material and have a variable diameter fastening function so that it can adapt to wires of different diameters.

[0035] The outer diameter of the upper fixture 1 is slightly smaller than the outer diameter of the above-mentioned intermediate outer mold 3, so that the upper fixture 1 can be stably placed on the intermediate outer mold 3, and the wire fixing ring 10 is adjusted to make the wire and the test sample in good contact in the center, thereby ensuring conductivity. The above-mentioned intermediate outer mold 3 has an internal sleeve mold that can be adapted to the placement of test samples of different sizes, and the clearance between the intermediate outer mold 3 and the internal sleeve mold is matched to facilitate demoulding. Specifically, the internal sleeve mold includes but is not limited to a cylindrical sleeve mold 7, a small circular ring sleeve mold 8 and a large circular ring sleeve mold 9, and the above-mentioned small circular ring sleeve mold 8 is detachably mounted on the outside of the above-mentioned cylindrical sleeve mold 7, and the above-mentioned large circular ring sleeve mold 9 is detachably mounted on the outside of the above-mentioned small circular ring sleeve mold 8. In order to reduce the probability of deformation, the intermediate outer mold 3 is made of rubber with a certain hardness, and it is also easy to demould. The cylindrical sleeve mold 7, the small circular ring sleeve mold 8 and the large circular ring sleeve mold 9 are made of silicone material. The clearance between the middle outer mold 3 and the large circular sleeve mold 9, the small circular sleeve mold 8 or the cylindrical sleeve mold 7 is matched, so as to facilitate demoulding and packaging of samples of different sizes. That is, when the test sample size is small, the cylindrical sleeve mold 7 located in the center can be selected; when the test sample size is slightly larger, the small circular sleeve mold 8 can be selected; then the large circular sleeve mold 9 can be selected, and the test personnel can choose according to their needs.

[0036] The lower fixture 4 in this embodiment also supports the above-mentioned middle outer mold 3 and the upper fixture 1, so the above-mentioned lower fixture 4 can be set in a disc shape. In order to increase the probability of the test sample contacting with the metal wire 5 and thus ensure the conductivity, the above-mentioned lower fixture 4 is provided with a metal gasket 6 in contact with the above-mentioned metal wire 5 and the test sample. The cross-sectional area of ​​the metal gasket 6 is large. If there are many metal wires 5, the electrical connection between the test sample and the metal wire 5 can be achieved as long as the test sample is in contact with the metal gasket 6.

[0037] In order to ensure the structural strength of the lower fixture 4 and reduce the probability of its deformation, the lower fixture 4 should be made of a harder polyester insulating material, in which the metal gasket 6 and the metal wire 5 are integrally cast with the lower fixture 4 to ensure the integration of the lower fixture 4. It is not necessary to install the metal gasket 6 and the metal wire 5 during each test, thereby reducing the difficulty of the test. In order to make the test sample fully contact with the metal gasket 6, the metal gasket 6 is slightly raised above the upper surface of the lower fixture 4. The metal wire 5 is slightly exposed outside the lower fixture 4, which is convenient for wire connection during conductivity measurement on the one hand; on the other hand, when the test sample needs to be demolded after packaging, the metal wire 5 can be gently pulled to drive the lower fixture 4 to move downward, thereby separating the lower fixture 4 from the middle outer mold 3.

[0038] A method for packaging an electrochemical corrosion sample comprises the following steps:

[0039] Step 1: The upper fixture 1 is pressed downward by its own weight to keep the wire fixed on the wire fixing ring 10 in contact with the test sample. Specifically, the self-weight of the upper fixture 1 and the elasticity of the flexible spring fixed on the middle wire fixing ring 10 ensure good contact between the wire and the test sample during the packaging process;

[0040] Step 2: Rotate the test sample according to the size of the test sample to place the test sample in the middle outer mold 3 or the inner sleeve mold. At this time, the test sample is located on the metal wire 5 in the middle of the lower fixture 4, specifically, on the metal gasket 6, and the metal wire 5, the metal gasket 6 and the test sample are fixed;

[0041] Step 3, after fixing the metal wire 5, the metal gasket 6 and the test sample, start pouring the encapsulation filler;

[0042] Step 4: Before the encapsulation filler is completely solidified, use the ohmmeter of a multimeter to connect the wire in the wire fixing ring with the metal wire 5 on the lower fixture 4 to check whether the conductivity of the wire and the test sample is good;

[0043] Step 5: According to the test results, adjust the position of the wire or the test sample or both to complete the packaging of the test sample.

[0044] The above-mentioned electrochemical corrosion sample packaging method effectively solves the packaging of conventional test samples of different sizes and timely detects the conductivity of the wire and the test sample during the sample packaging process, thereby reducing the probability of material waste.

[0045] The present invention provides an electrochemical corrosion sample packaging method. When operating an electrochemical corrosion sample packaging device, the main principle is as follows: in the sample packaging process of the electrochemical corrosion experiment, the test sample is first placed on the metal gasket 6 of the lower clamp 4 and placed in the center; then the middle outer mold 3 or the middle sleeve mold of the appropriate size is selected according to the size of the test sample; then the wire is retained at an appropriate length and clamped on the wire fixing ring 10, the upper clamp 1 with the wire is placed on the middle outer mold 3 and the flexible spring is in a slightly stretched state, and the position of the wire is adjusted so that one end is located at the test The middle position of the upper surface of the sample, and then observe whether the spring tension is sufficient to ensure the close contact between the wire and the test sample; after confirmation, pour the packaging filler into the middle outer mold 3 or the internal sleeve mold, and use the ohmmeter of the multimeter to connect the metal wire 5 of the lower fixture 4 and the wire in the wire fixing ring 10 before the packaging filler is completely solidified to confirm that the wire and the test sample have good conductivity; after the packaging filler is completely solidified, gently shake the lower fixture 4 to separate the test sample from the middle outer mold 3 or the internal sleeve mold. The internal sleeve mold is made of soft silicone, and the silicone mold has a certain plasticity, which further facilitates demolding.

[0046] The invention realizes the rapid packaging and conductivity detection of the test sample, avoids the inconvenience of welding or soldering the wire and the test sample, and the sample is demoulded quickly and can be packaged continuously for samples of different sizes.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0048] Although the following terms are used more frequently in this article: 1. upper clamp; 2. elastic tensioning member; 3. middle outer mold; 4. lower clamp; 5. metal wire; 6. metal gasket; 7. cylindrical sleeve mold; 8. small circular sleeve mold; 9. large circular sleeve mold; 10. wire fixing ring, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An electrochemical corrosion sample packaging device, characterized in that: The invention comprises an upper clamp (1) with a certain weight, an intermediate outer mold (3) for mounting a test sample, and a lower clamp (4), wherein the intermediate outer mold (3) is located between the upper clamp (1) and the lower clamp (4); the upper clamp (1) is arranged in a circular ring shape and is provided with a wire fixing ring (10) for fixing a wire, wherein the wire fixing ring (10) is installed at the center position of the upper clamp (1) through at least two elastic tensioning members (2) in different directions; the lower clamp (4) is provided with a metal wire (5) and the metal wire (5) extends outside the lower clamp (4); the test sample is installed corresponding to the position of the wire fixing ring (10) and is arranged in contact with the wire fixing ring (10) and the metal wire (5).

2. The electrochemical corrosion sample packaging device according to claim 1, characterized in that: There are four elastic tension members (2), and the four elastic tension members (2) are arranged equidistantly along the circumference of the wire fixing ring (10).

3. The electrochemical corrosion sample packaging device according to claim 2, characterized in that: The elastic tensioning member (2) is a flexible spring.

4. The electrochemical corrosion sample packaging device according to claim 1, characterized in that: The outer diameter of the upper clamp (1) is slightly smaller than the outer diameter of the middle outer mold (3).

5. The electrochemical corrosion sample packaging device according to claim 2, characterized in that: The middle outer mold (3) comprises a cylindrical sleeve mold (7), a small circular sleeve mold (8) and a large circular sleeve mold (9) which can be adapted to accommodate test specimens of different sizes. The small circular sleeve mold (8) can be detachably mounted on the outside of the cylindrical sleeve mold (7), and the large circular sleeve mold (9) can be detachably mounted on the outside of the small circular sleeve mold (8).

6. The electrochemical corrosion sample packaging device according to claim 1 or 5, characterized in that: The lower clamp (4) is arranged in a disc shape.

7. The electrochemical corrosion sample packaging device according to claim 6, characterized in that: The lower clamp (4) is provided with a metal gasket (6) in contact with the metal wire (5) and the test sample.

8. The electrochemical corrosion sample packaging device according to claim 7, characterized in that: The lower clamp (4) is made of insulating material and is integrally formed with the metal wire (5) and the metal gasket (6) by casting.

9. An electrochemical corrosion sample packaging method, applied to an electrochemical corrosion sample packaging device as claimed in any one of claims 1 to 8; characterized in that: The following steps are involved: Step 1: The upper clamp (1) is used to keep the wire and the test sample in contact with each other by its own weight; Step 2: The test sample is placed in the middle outer mold (3), and the test sample is located on the metal wire (5) in the lower clamp (4), and the metal wire (5) and the test sample are fixed; Step 3: After the metal wire (5) and the test sample are fixed, the encapsulation filler is poured; Step 4: Before the encapsulation filler is completely solidified, the ohmmeter of a multimeter is used to connect the wire in the wire fixing ring and the metal wire (5) on the lower clamp (4) to check whether the conductivity of the wire and the test sample is good; Step 5: According to the test result, the position of the wire or the test sample or both is adjusted to complete the encapsulation of the test sample.

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