Dissimilar metal test piece bundle and galvanic corrosion experiment device thereof

Abstract

The utility model discloses a dissimilar metal test piece bundle and a galvanic corrosion experiment device thereof, the dissimilar metal test piece bundle comprises a shaft lever, at least two dissimilar metal test pieces and sleeves, the at least two dissimilar metal test pieces are sleeved on the shaft lever, and the sleeves electrically connect the adjacent metal test pieces and fix the metal test pieces on the shaft lever at intervals. The galvanic corrosion experiment device for the dissimilar metal test piece bundle comprises a temperature adjusting container, a reagent container arranged in the temperature adjusting container and used for containing a corrosion solution and the dissimilar metal test piece bundle, a gas supply assembly for supplying gas into the reagent container, and a water circulation assembly for collecting evaporated water of the reagent container and supplementing water into the reagent container. According to the utility model, the standardization degree, experiment convenience and reliability of a dissimilar metal galvanic corrosion experiment can be improved.

Description

Technical Field

[0001] The utility model belongs to an experimental device and an experimental apparatus for metal testing, in particular to a dissimilar metal test piece bundle and a galvanic corrosion experimental apparatus thereof. Background Art

[0002] Based on comprehensive considerations of factors such as material cost, processing efficiency, and structural design, various industrial products are often made of dissimilar metals. Many of these industrial products have a complex or even harsh service environment (working environment). For example, when in contact with ion-rich conductive aqueous solutions, dissimilar metal products are prone to galvanic corrosion, which seriously affects their service life.

[0003] Currently, during the design phase of dissimilar metal products, the tendency and extent of galvanic corrosion are determined solely based on the metal's standard self-corrosion potential. However, these predictions and judgments are often inaccurate because metals with similar potentials can experience polarity reversal under different surface conditions or in different corrosive media. Therefore, existing testing methods and equipment cannot provide effective guidance for product corrosion protection design. For example, dissimilar metal products composed of stainless steel and copper have similar self-corrosion potentials, resulting in a low galvanic corrosion tendency in normal environments. However, in the presence of low-level carboxylic acids, the stainless steel will act as a cathode, accelerating the corrosion of the copper.

[0004] In addition, even if some electrical corrosion experiments are conducted in the existing technology, two or more dissimilar metal materials are simply connected with wires, inserted into a sodium chloride aqueous solution, and an ammeter is connected in series in the middle of the wires to test the galvanic current, and the galvanic current is judged based on its size and direction.

[0005] It can be seen that there is no specialized, standardized experimental device in the prior art to represent the dissimilar metal products to be tested. In addition, there is currently no standardized, compatible experimental device to conduct galvanic corrosion experiments on dissimilar metal products. Utility Model Content

[0006] The utility model aims to provide a dissimilar metal test piece bundle and a galvanic corrosion test device thereof, which can improve the standardization level of the dissimilar metal galvanic corrosion test.

[0007] A first aspect of the present invention provides a dissimilar metal test piece bundle, characterized by comprising:

[0008] shaft;

[0009] At least two dissimilar metal test pieces are sleeved on the shaft;

[0010] The sleeve electrically connects the adjacent metal test pieces and is fixed on the shaft at intervals.

[0011] As a preferred technical solution, the metal test piece is in the shape of a disc, and a hole is provided in the center for the shaft to pass through.

[0012] As a preferred technical solution, the shaft is a polyethylene screw, the through hole is a threaded hole matching the screw, and the sleeve is provided with an internal thread matching the screw.

[0013] As a preferred technical solution, the sleeve is a red copper sleeve.

[0014] A second aspect of the present invention provides a galvanic corrosion experimental device, characterized in that it includes:

[0015] The above-mentioned dissimilar metal test piece bundle;

[0016] Temperature control container;

[0017] a reagent container for containing a corrosive solution, disposed in the temperature-controlled container and having a supporting mechanism for supporting the dissimilar metal test piece bundle;

[0018] A gas supply assembly, comprising a gas supply mechanism disposed outside the temperature regulating container and a gas release mechanism disposed inside the reagent container;

[0019] The water circulation component comprises a water collecting mechanism for collecting evaporated water from the reagent container and a water injection mechanism for replenishing water into the reagent container.

[0020] As a preferred technical solution, the supporting mechanism is a lap joint provided on the inner side wall of the reagent container, the dissimilar metal test piece bundle is arranged in the reagent container in a longitudinal arrangement of the shaft, and the shaft is provided with a hanging piece that is engaged with the lap joint.

[0021] As a preferred technical solution, the supporting mechanism is a concave-convex mechanism provided on the inner bottom wall of the reagent container, the dissimilar metal test piece bundle is provided in the reagent container in a manner that the shaft is arranged horizontally, the sleeve of the dissimilar metal test piece bundle is supported on the convex portion of the concave-convex mechanism, and the metal test piece is suspended in the concave portion of the concave-convex mechanism.

[0022] As a preferred technical solution, the temperature adjustment container is a water bath.

[0023] As a preferred technical solution, the gas source supply mechanism is an air pump, and the gas source release mechanism is an exhaust pipe extending into the reagent container.

[0024] As a preferred technical solution, the exhaust pipe has a first exhaust hole for exhausting gas into the liquid surface of the corrosive solution in the reagent container and / or a second exhaust hole for exhausting gas out of the liquid surface of the corrosive solution in the reagent container.

[0025] As a preferred technical solution, the water circulation component further includes a water storage mechanism, which is arranged between the water collecting mechanism and the water injection mechanism.

[0026] As a preferred technical solution, the water collecting mechanism includes a condenser and a collecting pipe arranged on the top of the reagent container, and the condenser is connected to the collecting pipe and the water storage mechanism.

[0027] As a preferred technical solution, the water injection mechanism includes a water pump connected to the water storage mechanism and a water injection pipe connected between the water pump and the reagent container.

[0028] The dissimilar metal test piece bundle provided by the present invention is provided with a shaft to pass through at least two dissimilar metal test pieces to be tested, and a sleeve is used to separate and electrically connect adjacent metal test pieces, so that the mechanical structure and electrical connection of the dissimilar metal test piece bundle are more stable, and it can be used as a standardized experimental device to conduct galvanic corrosion experiments. In addition, in the galvanic corrosion experimental device provided by the present invention, the reagent container is used to hold the corresponding corrosion solutions required for various experiments, and a support mechanism dedicated to the dissimilar metal test piece bundle is provided; by providing a temperature control container and an air supply component, the ambient temperature and ambient gas of the reagent container are simulated and controlled to make it close to the actual service environment; by providing a water circulation component, it can be ensured that the volatilized water vapor in the reagent container is circulated and replenished, and the consistency of the concentration of the corrosion solution during the experiment is ensured. The present invention can improve the standardization of dissimilar metal galvanic corrosion experiments and the convenience and reliability of the experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of a dissimilar metal test piece bundle provided in a specific embodiment of the present utility model.

[0030] Figure 2 This is a front view of a dissimilar metal test piece bundle provided in a specific embodiment of the present utility model.

[0031] Figure 3 A side view of a dissimilar metal test piece bundle provided in a specific embodiment of the present utility model.

[0032] Figure 4 A three-dimensional diagram of a galvanic corrosion experimental device provided in a specific embodiment of the present utility model.

[0033] Figure 5 This is a front view of the galvanic corrosion experimental device provided in a specific embodiment of the utility model.

[0034] Figure 6 A top view of a galvanic corrosion experimental device provided in a specific embodiment of the present utility model.

[0035] Figure 7A side view of a galvanic corrosion experimental device provided in a specific embodiment of the present utility model.

[0036] Figure 8 This is a schematic diagram of a galvanic corrosion experimental device provided in a specific embodiment of the present invention, in which a bundle of dissimilar metal test pieces is arranged in a reagent container with its shafts arranged longitudinally.

[0037] Figure 9 This is a schematic diagram of a galvanic corrosion experimental device provided in a specific embodiment of the present invention, in which a bundle of dissimilar metal test pieces is arranged in a reagent container with its shafts arranged horizontally.

[0038] Explanation of the accompanying numbers: 100-dissimilar metal test piece bundle, 10-axis, 20-metal test piece, 30-sleeve, 200-temperature control container, 300-reagent container, 400-air supply assembly, 500-water circulation assembly, bridging piece 301, 11-hanging piece, 302-protrusion, 303-recessed portion, 410-air source supply mechanism, 420-air source release mechanism, 510-water collection mechanism, 520-water storage mechanism, 530-water injection mechanism, 511-condenser, 512-collection pipe, 531-water pump, 532-water injection pipe. DETAILED DESCRIPTION

[0039] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0040] In the description of the present utility model, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and so on, indicating the orientation or position relationship, are based on the orientation or relative position relationship shown in the accompanying drawings, and are intended to facilitate a clear description of the structure of the product or device, and are not used to limit the actual orientation of the product or device during production, use, sales, etc.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "set," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Under the premise that the specific embodiments do not conflict with each other, the technical features in the specific embodiments can be used interchangeably.

[0045] The dissimilar metal test piece bundle provided in this embodiment is used to simulate dissimilar metal parts to conduct galvanic corrosion experiments. Figure 1 、 Figure 2 and Figure 3 As shown, the dissimilar metal test piece bundle 100 provided in this embodiment includes a shaft 10, at least two metal test pieces 20, and at least one sleeve 30. The two or more metal test pieces 20 include at least two different types of dissimilar metal test pieces; for example, two steel test pieces and two copper test pieces, or one steel test piece, two aluminum test pieces, and one silver test piece. The at least two dissimilar metal test pieces 20 are sleeved onto the shaft 10. The sleeve 30 is sleeved onto the shaft 10, electrically connecting adjacent metal test pieces 20 and securing them to the shaft 10 at intervals.

[0046] Combine Figure 3As shown, the metal test piece 20 in this embodiment is in the shape of a disc, and a hole is provided in the center thereof for the shaft 10 to pass through. In addition, the shaft 10 is preferably a polyethylene screw, and nuts (not shown) are provided at both ends of the entire shaft 10. The nuts can clamp all the metal test pieces 20 set on the shaft 10. The hole for the metal test piece 20 is a threaded hole that matches the screw; at the same time, the sleeve 30 is provided with an internal thread that matches the screw. In this way, the metal test piece 20 can be connected to the shaft 10 through penetration and can be adjusted in position on the shaft 10; in addition, the sleeve 30 can lock the position of the metal test piece 20 on the shaft 10 to ensure the spacing between the metal test pieces, and can also electrically connect adjacent metal test pieces. In order to ensure better electrical conductivity, the sleeve 30 in this embodiment is a copper sleeve.

[0047] The dissimilar metal test piece bundle 100 provided in the above embodiment is provided by a shaft 10 through which at least two dissimilar metal test pieces 20 to be tested are inserted, and a sleeve 30 is used to fix adjacent metal test pieces at intervals and electrically connect them, making the mechanical structure and electrical connection of the dissimilar metal test piece bundle 100 more stable, and it can be used as a standardized experimental device for galvanic corrosion experiments. When different dissimilar metal corrosion experiments are required, corresponding sets of metal test pieces 20 are selected and assembled into a bundle; and the number and spacing of the metal test pieces 20 can be flexibly adjusted, making the dissimilar metal test piece bundle 100 as an experimental sample more convenient for standardized management and operation, and significantly improving the convenience and reliability of galvanic corrosion experiments.

[0048] See also Figures 4 to 7 As shown, this embodiment further provides a galvanic corrosion experimental device for a dissimilar metal test piece bundle based on the above-mentioned dissimilar metal test piece bundle 100 , including a temperature control container 200 , a reagent container 300 , an air supply component 400 and a water circulation component 500 .

[0049] The reagent container 300 is used to hold various corrosive solutions for galvanic corrosion experiments. The specific corrosive solution can be replaced based on the specific experimental requirements. The reagent container 300 is placed within the thermostat container 200. The thermostat container 200 is used to control the temperature of the reagent container 300 so that the corrosive solution in the reagent container 300 is adjusted to the desired experimental temperature, such as the temperature of the dissimilar metal workpiece working environment represented by the dissimilar metal specimen bundle 100. Specifically, the thermostat container 200 can be a water bath or an incubator.

[0050] The reagent container 300 has a support mechanism for supporting the dissimilar metal test piece bundle 100. As a feasible embodiment, the support mechanism is a bridge 301 provided on the inner wall of the reagent container 300. The dissimilar metal test piece bundle 100 is arranged in the reagent container 300 in a longitudinal arrangement with its shaft 10, and the shaft 10 is provided with a hanging member 11 (see Figure 8 shown).

[0051] As an alternative embodiment, the supporting mechanism is a concave-convex mechanism provided on the bottom wall of the reagent container 300. The dissimilar metal test piece bundle 100 is arranged in the reagent container 300 with its shaft 10 arranged transversely. The sleeve 30 of the dissimilar metal test piece bundle 100 is supported on the raised portion 302 of the concave-convex mechanism, and the metal test piece 20 is suspended in the concave portion 303 of the concave-convex mechanism (see FIG. Figure 9 shown).

[0052] Continue to see Figures 4 to 7 The gas supply assembly 400 includes a gas supply mechanism 410 disposed outside the temperature-controlled container and a gas release mechanism 420 disposed within the reagent container. Specifically, the gas supply mechanism 410 is an air pump, and the gas release mechanism 420 is an exhaust pipe extending into the reagent container. In a preferred embodiment, the exhaust pipe has a first exhaust hole for exhausting gas into the liquid level of the corrosive solution in the reagent container 300, and a second exhaust hole for exhausting gas out of the liquid level of the corrosive solution in the reagent container 300.

[0053] Continue to see Figures 4 to 7 The water circulation component 500 includes a water collecting mechanism 510 for collecting evaporated water from the reagent container 300, a water storage mechanism 520, and a water injection mechanism 530 for replenishing water into the reagent container. The water storage mechanism 520 is arranged between the water collecting mechanism 510 and the water injection mechanism 530.

[0054] The water collection mechanism 510 includes a condenser 511 and a collection pipe 512 disposed on the top of the reagent container 300. The condenser 511 is connected to a water storage mechanism 520 via the collection pipe 512. The water storage mechanism 520 can be a water tank. The water injection mechanism 530 includes a water pump 531 connected to the water storage mechanism and a water injection pipe 532 connected between the water pump 531 and the reagent container 300.

[0055] As a more specific technical solution, the reagent container 300 is a three-necked beaker, the first mouth of which is used to cooperate with the gas source release mechanism 420 of the gas supply component 400, the second mouth of which is used to cooperate with the water collection mechanism 510 of the water circulation component 500, and the third mouth of which is used to cooperate with the water injection mechanism 530 of the water circulation component 500, and the water injection mechanism 530 is a water injection pipe.

[0056] In the galvanic corrosion experimental device provided by the above embodiment, the reagent container 300 is used to hold the corresponding corrosion solution required for various experiments, and a support mechanism dedicated to the dissimilar metal specimen bundle 100 is provided. By providing a temperature control container 200 and an air supply component 400, the reagent container 300 is simulated to control the ambient temperature and ambient gas, so that it is close to the working environment of the dissimilar metal parts represented by the dissimilar metal specimen bundle 100. By providing a water circulation component 500, it can be ensured that the volatilized water vapor in the reagent container 300 is circulated and replenished, ensuring the consistency of the corrosion solution concentration during the experiment. After the experiment is completed according to the test cycle, the corrosion products of the specimen are cleaned, and the galvanic corrosion tendency and corrosion degree of the dissimilar metals under the above corrosion conditions are judged by the maximum corrosion depth or corrosion weight loss rate, providing guidance for the anti-corrosion design of the product. In addition, during the experiment, a voltmeter can be connected in series between the sleeves to test the galvanic current and current, and relevant detection data can be obtained through the galvanic current, voltage magnitude and direction.

[0057] In addition, two or more reagent containers 300 may be installed in one temperature control container 200 , and two or more sets of gas supply components 400 and water circulation components 500 may be used to implement galvanic corrosion experiments on multiple dissimilar metal test piece bundles 100 .

[0058] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A dissimilar metal test piece bundle, characterized in that: include: shaft; At least two dissimilar metal test pieces are sleeved on the shaft; The sleeve electrically connects the adjacent metal test pieces and is fixed on the shaft at intervals.

2. The dissimilar metal test piece bundle according to claim 1, characterized in that: The metal test piece is in the shape of a disc, and a hole is provided in the center for the shaft to pass through.

3. The dissimilar metal test piece bundle according to claim 2, characterized in that: The shaft is a polyethylene screw, the through hole is a threaded hole matching the screw, and the sleeve is provided with an internal thread matching the screw.

4. A galvanic corrosion experimental device, characterized in that: include: The dissimilar metal test piece bundle according to any one of claims 1 to 3; Temperature control container; a reagent container for containing a corrosive solution, disposed in the temperature-controlled container and having a supporting mechanism for supporting the dissimilar metal test piece bundle; A gas supply assembly, comprising a gas supply mechanism disposed outside the temperature regulating container and a gas release mechanism disposed inside the reagent container; The water circulation component comprises a water collecting mechanism for collecting evaporated water from the reagent container and a water injection mechanism for replenishing water into the reagent container.

5. The galvanic corrosion experimental device according to claim 4, characterized in that: The supporting mechanism is a lap joint provided on the inner side wall of the reagent container. The dissimilar metal test piece bundle is arranged in the reagent container in a longitudinal arrangement of the shaft. The shaft is provided with a hanging piece that is engaged with the lap joint.

6. The galvanic corrosion experimental device according to claim 4, characterized in that: The supporting mechanism is a concave-convex mechanism provided on the inner bottom wall of the reagent container. The dissimilar metal test piece bundle is provided in the reagent container in a manner that the shaft is arranged transversely. The sleeve of the dissimilar metal test piece bundle is supported on the convex portion of the concave-convex mechanism, and the metal test piece is suspended in the concave portion of the concave-convex mechanism.

7. The galvanic corrosion experimental device according to claim 4, characterized in that: The temperature adjustment container is a water bath.

8. The galvanic corrosion experimental device according to claim 4, characterized in that: The gas source supply mechanism is an air pump, and the gas source release mechanism is an exhaust pipe extending into the reagent container.

9. The galvanic corrosion experimental device according to claim 8, characterized in that: The exhaust pipe has a first exhaust hole for exhausting gas into the liquid surface of the corrosive solution in the reagent container and a second exhaust hole for exhausting gas out of the liquid surface of the corrosive solution in the reagent container.

10. The galvanic corrosion experimental device according to claim 4, characterized in that: The water circulation component further includes a water storage mechanism, which is arranged between the water collecting mechanism and the water injection mechanism.

11. The galvanic corrosion experimental device according to claim 10, characterized in that: The water collecting mechanism includes a condenser and a collecting pipe arranged on the top of the reagent container, and the condenser is connected to the collecting pipe and the water storage mechanism.

12. The galvanic corrosion experimental device according to claim 10, characterized in that: The water injection mechanism includes a water pump connected to the water storage mechanism and a water injection pipe connected between the water pump and the reagent container.

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