CN110208177B - Electrochemical experimental device - Google Patents
Electrochemical experimental device Download PDFInfo
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- CN110208177B CN110208177B CN201910544393.5A CN201910544393A CN110208177B CN 110208177 B CN110208177 B CN 110208177B CN 201910544393 A CN201910544393 A CN 201910544393A CN 110208177 B CN110208177 B CN 110208177B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
Abstract
The invention provides an electrochemical experimental device. The electrochemical experimental device comprises: the liquid guiding device comprises a base, a cover body and a pressure head part, wherein the base is provided with a mounting groove, the cover body is detachably arranged in the mounting groove, the cover body is provided with a plurality of mounting cavities, the mounting cavities are arranged at intervals, a gap is formed between the bottom of the cover body and the bottom of the mounting groove to form a liquid guiding space, the mounting cavities are all communicated with the liquid guiding space, the pressure head part is used for fixing an object to be detected in the mounting cavity, and at least part of the pressure head part is detachably arranged in the mounting cavity; through movably being provided with the regulating part on the lid to utilize operation regulating part in order to change the height in the clearance between lid and the base, and then detect the corruption condition of the thing to be measured of different gaps in to the installation intracavity of lid.
Description
Technical Field
The invention relates to the technical field of metal material crevice corrosion, in particular to an electrochemical experimental device.
Background
The crevice corrosion of metal materials is local corrosion, and when cracks exist in the metal materials or narrow crevices are formed between metal and other objects, the crevice corrosion can occur, and researches show that the crevice corrosion sensitivity is highest when the width of the crevice is 0.05-0.15 mm. According to the principle of the blocking corrosion battery, convection and diffusion of solution inside and outside the gap are blocked, so that the blocking area is poor in oxygen, oxygen is still enriched outside the gap, and the resulting oxygen concentration difference battery enables the potential of metal inside the gap to be lower than that of metal outside the gap, the pH value to be reduced and H to be increased+And Cl-Activating the metal with (HCl) to promote dissolution of the metal in the occlusion region and formation of secondary corrosion products Fe (OH) at the seam3Resulting in excess of positive charge, Cl-And (4) migrating. The chloride is hydrolyzed in water to make the medium (H) in the gap+Increasing concentration) of the acid, the pH decreases and, therefore, dissolution of the anode is accelerated. Accelerated dissolution of the anode, in turn, causes more Cl-The ions move in, the chloride concentration is increased, the hydrolysis of the chloride enables the medium to be further acidified, and the process is repeatedly circulated, so that the autocatalysis effect in the closed battery is formed. The gap mouth is a certain obstacle to the convection and diffusion of the solution relative to the outside of the gap, but the solution is a solution relative to the bottom of the gapThe convection and diffusion of the solution are easy, and the oxygen concentration difference is not large, so that the solution has increasingly large convection and diffusion resistance and oxygen concentration difference from the gap opening to the gap bottom, and the corrosion conditions of the gap opening and the gap bottom are greatly different. The existing device can only detect the corrosion degree of a gap with fixed height to an object to be detected, and gap experiments with different heights can only adopt different devices, so that the process is complicated.
The evaluation methods for crevice corrosion of metallic materials are specified in detail in the standards ASTM G48 and GB/T10127. However, these two standard methods do not reflect the process and mechanism of crevice corrosion under actual conditions. No study is specially conducted on electrochemical information, pH value and ion concentration change and difference of the crevice opening and the crevice bottom corrosion in the current standard and technology.
Disclosure of Invention
The invention mainly aims to provide an electrochemical experimental device to solve the problem of single gap height in a gap corrosion experiment in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electrochemical experimental apparatus comprising: the base is provided with a mounting groove; the cover body is detachably arranged in the mounting groove and provided with a plurality of mounting cavities which are arranged at intervals, a gap is formed between the bottom of the cover body and the bottom of the mounting groove to form a liquid guiding space, and the mounting cavities are communicated with the liquid guiding space; the pressure head part is used for fixing the object to be detected in the mounting cavity, and at least part of the pressure head part is detachably arranged in the mounting cavity; wherein, be provided with the regulating part on the lid, through the height of operation regulating part in order to adjust the clearance.
Furthermore, the cover body is provided with a connecting hole, the adjusting portion can movably penetrate through the connecting hole, the first end of the adjusting portion is abutted to the mounting groove, the second end of the adjusting portion forms an operating end, and the operating end is rotated to enable the first end of the adjusting portion to stretch out and draw back so as to change the height of the gap.
Furthermore, the connecting holes are multiple, the adjusting parts are multiple, the connecting holes and the adjusting parts are arranged in a one-to-one correspondence mode, and the adjusting parts are arranged at intervals along the circumferential direction of the cover body.
Further, the base includes: the bottom plate is rectangular; the curb plate, the curb plate is three, and three curb plate links to each other in proper order, and three curb plate is connected with the three limit of bottom plate, and wherein, three curb plate encloses with the bottom plate and establishes formation mounting groove.
Further, a plurality of installation cavities are arranged at intervals along the length direction of the cover body.
Further, the lid is a plurality of, and a plurality of lids all have the installation cavity, and a plurality of lids set up along the length direction interval of mounting groove.
Further, the head section includes: the first pressure head is detachably arranged in the mounting cavity, and a connecting hole is formed in the middle of the first pressure head; the through-hole that supplies the wire to pass is seted up to the middle part of second pressure head, and second pressure head movably sets up in the connecting hole to drive the wire through removing the second pressure head and paste and lean on in waiting to detect the thing.
Further, the electrochemical experimental apparatus comprises an electrochemical workstation; the device comprises a shell, a base and a water tank, wherein the shell is provided with a solution tank, solution is filled in the solution tank, and the base is arranged in the solution tank; and one end of the electrode lead is connected with the electrochemical workstation, and the other end of the electrode lead is used for connecting an object to be detected.
Further, the lower surface of the object to be detected is higher than the lower end face of the cover body, the liquid level of the solution is higher than the lower surface of the object to be detected, and the liquid level of the solution is lower than the upper end face of the cover body.
Furthermore, a PH electrode and/or an ion concentration meter are arranged on the cover body.
By applying the technical scheme of the invention, the cover body is movably provided with the adjusting part, and the height of the gap between the cover body and the base is changed by operating the adjusting part, so that the corrosion condition of the gap to the object to be detected in the mounting cavity of the cover body is detected.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural view of an embodiment of an electrochemical experimental apparatus according to the present invention;
FIG. 2 shows a schematic structural view of an embodiment of a cover and a base of an electrochemical experimental apparatus according to the present invention;
FIG. 3 shows a schematic structural view of an embodiment of a cover of an electrochemical experimental apparatus according to the present invention;
FIG. 4 shows a schematic structural view of a first ram embodiment of an electrochemical experimental apparatus according to the present invention;
figure 5 shows a schematic structural view of a second embodiment of the indenter of the electrochemical experimental device according to the present invention.
Wherein the figures include the following reference numerals:
10. a base;
20. a cover body; 21. a mounting cavity;
30. pressing the head part; 31. a first ram; 32. a second ram;
40. an adjusting part.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
In a task of 'research on failure modes and damage mechanisms of high-risk (gas and heat) pipelines and accessory facilities in an corridor' of a task of technical research on safety protection of high-risk (gas and heat) pipelines and accessory facilities in a corridor (a task number is 2017YFC0805003), aiming at the problem that crevice corrosion frequently occurs at the contact position of a pipeline and a pipe frame, the electrochemical characteristics of crevice corrosion of the pipeline need to be researched, a prediction model and an evaluation method for crevice corrosion of the pipeline in the corridor are established, and the existing standards and technologies do not specially research on electrochemical information, pH values and ion concentration changes and differences of corrosion depths in different crevices. Therefore, referring to fig. 1 to 5, according to an embodiment of the present invention, an electrochemical experimental apparatus is provided to assist in establishing a crevice corrosion prediction model and an evaluation method for the task.
Specifically, as shown in fig. 1, the electrochemical experimental apparatus includes: the liquid guiding device comprises a base 10, a cover body 20 and a pressure head part 30, wherein the base 10 is provided with a mounting groove, the cover body 20 is detachably arranged in the mounting groove, the cover body 20 is provided with a plurality of mounting cavities 21, the mounting cavities 21 are arranged at intervals, a gap is formed between the bottom of the cover body 20 and the bottom of the mounting groove to form a liquid guiding space, the mounting cavities 21 are all communicated with the liquid guiding space, the pressure head part 30 is used for fixing an object to be detected in the mounting cavities 21, and at least part of the pressure head part 30 is detachably arranged in the mounting cavities 21; wherein, the cover body 20 is movably provided with an adjusting portion 40, and the height of the gap is adjusted by operating the adjusting portion 40.
In this embodiment, the cover is movably provided with the adjusting portion, and the adjusting portion is operated to change the height of the gap between the cover and the base, so as to detect the corrosion of the gap solution to the object to be tested in the mounting cavity of the cover.
As shown in fig. 3, a connection hole is formed on the cover body 20, and the adjusting portion 40 is movably penetrated in the connection hole, wherein a first end of the adjusting portion 40 abuts against the installation groove, a second end of the adjusting portion 40 forms an operation end, and the operation end is rotated to extend or shorten the first end of the adjusting portion 40 to change the height of the gap. The adjusting part can be a screw rod, the screw rod penetrates into the connecting hole, and the gap between the bottom of the cover body 20 and the groove bottom of the mounting groove can be adjusted to be large or small by rotating the screw rod so as to be suitable for a gap corrosion experiment.
In the present embodiment, there are a plurality of connection holes, a plurality of adjustment portions 40, a plurality of connection holes and a plurality of adjustment portions 40 are provided in one-to-one correspondence, and the plurality of adjustment portions 40 are provided at intervals in the circumferential direction of the cover body 20. Through setting up a plurality of regulating parts, can be pertinence adjust the gap height to different positions to improve the accuracy of gap corrosion experiment.
In the present embodiment, the base 10 includes: the bottom plate is a rectangle, the side plates are three, the three side plates are sequentially connected, the three side plates are connected with three sides of the bottom plate, the three side plates and the bottom plate are surrounded to form mounting grooves, and the positions where the side plates are not arranged are opening parts. Namely, the base is a dustpan type base so as to facilitate the external solution to enter the liquid through the opening of the dustpan type base.
As shown in fig. 1 and 2, the plurality of mounting cavities 21 are provided at intervals along the longitudinal direction of the lid body 20. Wherein, the sample near the opening side is a slit sample, and the sample far from the opening side is a slit bottom sample. The arrangement can simulate the corrosion environment of different parts of the gap at the same time. Wherein, the installation cavity is the through-hole, and the one end of through-hole towards base 10 is provided with backstop annular boss, so that the installation waits to detect the thing through backstop annular boss promptly the sample.
In this embodiment, there are a plurality of cover bodies 20, each of the cover bodies 20 has a mounting cavity 21, and the cover bodies 20 are arranged at intervals along the length direction of the mounting groove. Through setting up a plurality of lids 20, every lid 20 all has independent regulating part 40, and the setting is convenient for according to user's needs like this, can carry out the crevice corrosion experiment of co-altitude in the lid of difference.
As shown in fig. 4 and 5, the head section 30 includes: first pressure head 31 and second pressure head 32, first pressure head 31 detachably sets up in installation cavity 21, and the connecting hole has been seted up at the middle part of first pressure head 31, and the through-hole that supplies the wire to pass is seted up at the middle part of second pressure head 32, and second pressure head 32 movably sets up in the connecting hole. Wherein, first pressure head 31 can be hollow big bolt, and second pressure head 32 is the hollow little bolt that sets up in first pressure head 31, and the middle part of second pressure head 32 is used for wearing to establish and fixed wire, uses hollow big bolt namely first pressure head 31 earlier, screws up the sample on sample platform is the lid, because the big bolt is hollow, so at downthehole open thread groove, screws into with the little bolt of taking the wire namely second pressure head 32, until wire and the secret laminating of sample back, or contact. The method has the advantages that the sample is fixed or the connecting wire is connected by screwing the bolt, the sample cannot be polluted, the sample can be taken out and directly weighed after the test is finished, the corrosion rate of crevice corrosion is calculated by a weight loss method, and the corrosion rate and the electrochemical method are mutually supported.
In the embodiment, the electrochemical experimental device comprises an electrochemical workstation, a shell and an electrode lead, wherein the shell is provided with a solution tank, a solution is filled in the solution tank, and a base 10 is arranged in the solution tank; one end of the electrode lead is connected with the electrochemical workstation, and the other end of the electrode lead is used for connecting an object to be detected. The arrangement is convenient for carrying out a crevice corrosion experiment.
In this embodiment, the lower surface of the object to be detected is higher than the lower end surface of the cover 20, the liquid level of the solution is higher than the lower surface of the object to be detected, and the liquid level of the solution is lower than the upper end surface of the cover 20, so as to prevent the solution from penetrating into the gap between the upper end surface of the cover 20 and the upper surface of the object to be detected.
In the present embodiment, the cover 20 is provided with a PH electrode or an ion concentration meter, but both may be provided at the same time. The electrochemical information of the seam opening and the seam bottom, the change information of the pH value and the ion concentration can be monitored and collected in real time through the electrochemical workstation, the pH meter and the ion concentration meter, and the detailed explanation of the corrosion mechanism of the metal material in a specific corrosion environment is facilitated.
Preparing two identical wafer-shaped samples, namely the objects to be detected, wherein the diameter of the sample is required to be smaller than that of the installation cavity and is at least 2mm larger than that of the stop ring-shaped boss, polishing the test surface of the sample, removing the oxide film on the surface and enabling the surface to be flat and smooth, and connecting a lead on the reverse side of the sample. The lid 20 is equipped with two and constitutes the sample platform by screw hole and through-hole, and every sample platform left and right sides is equipped with the hole of installation pH electrode and ion concentration meter, arranges O type seal ring in on the sample platform, and the sample test surface is pressed down on O type seal ring, and reuse plastics bolt sticiss each sample on the sample platform through the screw hole and seal, and the wire of connection at the sample reverse side is drawn forth to the electrochemistry workstation through the bolt hole, is used as working electrode. Meanwhile, the pH electrode and the ion concentration meter are installed in the corresponding hole of the cover body 20 to monitor the change of pH and ion concentration in the reaction process in real time. The packaged gap device is placed in a solution pool, a reference electrode and an auxiliary electrode are placed at the same time, and a three-electrode system is formed by the gap device and samples at different positions, wherein the auxiliary electrode and the reference electrode can be arranged in a plurality of preset holes of the cover body 20, and the solution pressure drop can be reduced by the arrangement. The reference electrode and the auxiliary electrode are externally connected with an electrochemical workstation, and are used for monitoring and acquiring electrochemical information, pH value and ion concentration of samples at different positions of the gap in real time, and testing corrosion characteristics under different external signals, such as testing of different depths of the gap opening, the gap bottom and the gap, wherein at least two samples can be arranged on the cover body 20. After the experiment is finished, the sample is taken out, the corrosion product and the corrosion morphology of the sample are analyzed, and the mechanism of crevice corrosion can be more comprehensively explained by combining the electrochemical information, the change of the pH value and the ion concentration. Alternatively, in order to reduce the pressure drop of the solution, a plurality of preset holes may be formed on both sides of the mounting cavity of the cover 20, and the reference electrode and the auxiliary electrode may be placed in the preset holes.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electrochemical experimental apparatus, comprising:
the base (10), the said base (10) has mounting grooves;
the cover body (20) is detachably arranged in the mounting groove, the cover body (20) is provided with a plurality of mounting cavities (21), the mounting cavities (21) are arranged at intervals, a gap is formed between the bottom of the cover body (20) and the bottom of the mounting groove to form a liquid guiding space, and the mounting cavities (21) are communicated with the liquid guiding space;
the pressing head part (30) is used for fixing an object to be detected in the mounting cavity (21), and at least part of the pressing head part (30) is detachably arranged in the mounting cavity (21);
wherein, the cover body (20) is movably provided with an adjusting part (40), and the height of the gap is adjusted by operating the adjusting part (40).
2. The electrochemical experimental apparatus according to claim 1, wherein the cover body (20) is provided with a connecting hole, and the adjusting portion (40) is movably penetrated in the connecting hole, wherein a first end of the adjusting portion (40) abuts against the mounting groove, a second end of the adjusting portion (40) forms an operating end, and the operating end is rotated to extend or shorten the first end of the adjusting portion (40) so as to change the height of the gap.
3. The electrochemical experimental apparatus according to claim 2, wherein the connecting hole is plural, the adjusting portion (40) is plural, the connecting holes are provided in one-to-one correspondence with the adjusting portions (40), and the adjusting portions (40) are provided at intervals in a circumferential direction of the cover body (20).
4. Electrochemical experimental device according to claim 1, characterized in that said base (10) comprises:
the bottom plate is rectangular;
the side plates are three and are sequentially connected, the side plates are connected with the three sides of the bottom plate, and the side plates and the bottom plate are surrounded to form the mounting groove.
5. Electrochemical experimental apparatus according to claim 1, characterized in that a plurality of said mounting cavities (21) are provided at intervals along the length direction of said cover body (20).
6. The electrochemical experimental apparatus according to claim 1, wherein the cover body (20) is plural, each of the plural cover bodies (20) has the mounting cavity (21), and the plural cover bodies (20) are arranged at intervals along a length direction of the mounting groove.
7. Electrochemical experimental device according to claim 1, characterized in that said presser head portion (30) comprises:
the first pressure head (31) is detachably arranged in the mounting cavity (21), and a connecting hole is formed in the middle of the first pressure head (31);
the second pressure head (32), the through-hole that supplies the wire to pass is seted up at the middle part of second pressure head (32), second pressure head (32) movably set up in the connecting hole, in order through removing second pressure head (32) drive the wire pastes and treats the thing in waiting.
8. The electrochemical experimental apparatus of claim 1, wherein the electrochemical experimental apparatus comprises:
an electrochemical workstation;
the device comprises a shell, a base and a water tank, wherein the shell is provided with a solution tank, a solution is filled in the solution tank, and the base (10) is arranged in the solution tank;
and one end of the electrode lead is connected with the electrochemical workstation, and the other end of the electrode lead is used for connecting an object to be detected.
9. The electrochemical experimental apparatus according to claim 8, wherein the lower surface of the object to be detected is higher than the lower end surface of the cover body (20), the liquid level of the solution is higher than the lower surface of the object to be detected, and the liquid level of the solution is lower than the upper end surface of the cover body (20).
10. Electrochemical experimental apparatus according to claim 1, characterized in that, the lid (20) is provided with a PH electrode and/or an ion concentration meter.
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| CN201910544393.5A CN110208177B (en) | 2019-06-21 | 2019-06-21 | Electrochemical experimental device |
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| CN105043971A (en) * | 2015-07-02 | 2015-11-11 | 中国民航大学 | Experiment device for research on corrosion behavior of metal substrate beneath peeling coating |
| JP2017003419A (en) * | 2015-06-10 | 2017-01-05 | 株式会社日立製作所 | Gap corrosion sensor and gap corrosion monitoring system |
| KR20170075054A (en) * | 2015-12-22 | 2017-07-03 | 주식회사 포스코 | Manufacturing apparatus of specimen assembly for measuring crevice corrosion and manufacturing metohd of using the same |
| CN206601327U (en) * | 2017-03-03 | 2017-10-31 | 西安石油大学 | A kind of electrochemical test experiment device for simulating crevice corrosion |
| CN109655506A (en) * | 2017-10-10 | 2019-04-19 | 宁德时代新能源科技股份有限公司 | Electrochemical performance testing device |
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| US20170089828A1 (en) * | 2015-09-28 | 2017-03-30 | Carrier Corporation | Corrosion sensor |
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| JPS602682A (en) * | 1983-06-21 | 1985-01-08 | Toshiba Corp | Method for preventing crevice corrosion |
| CN103630480A (en) * | 2012-08-23 | 2014-03-12 | 中国科学院金属研究所 | Corrosion testing device for metal inside gaps under stripped coatings |
| CN203350123U (en) * | 2013-08-16 | 2013-12-18 | 中国科学院金属研究所 | Device for carrying out metal stress corrosion test in gap |
| CN103513010A (en) * | 2013-10-10 | 2014-01-15 | 中国科学院金属研究所 | Artificial gap device for researching gap corrosion simulation test and use method of artificial gap device |
| CN103528944A (en) * | 2013-10-24 | 2014-01-22 | 北京科技大学 | Electrochemical performance testing device for crevice corrosion |
| JP2017003419A (en) * | 2015-06-10 | 2017-01-05 | 株式会社日立製作所 | Gap corrosion sensor and gap corrosion monitoring system |
| CN105043971A (en) * | 2015-07-02 | 2015-11-11 | 中国民航大学 | Experiment device for research on corrosion behavior of metal substrate beneath peeling coating |
| KR20170075054A (en) * | 2015-12-22 | 2017-07-03 | 주식회사 포스코 | Manufacturing apparatus of specimen assembly for measuring crevice corrosion and manufacturing metohd of using the same |
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| CN109655506A (en) * | 2017-10-10 | 2019-04-19 | 宁德时代新能源科技股份有限公司 | Electrochemical performance testing device |
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| CN110208177A (en) | 2019-09-06 |
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