CN210720109U - Electrolytic cell for local electrochemical research of L-shaped sample - Google Patents
Electrolytic cell for local electrochemical research of L-shaped sample Download PDFInfo
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- CN210720109U CN210720109U CN201921674464.5U CN201921674464U CN210720109U CN 210720109 U CN210720109 U CN 210720109U CN 201921674464 U CN201921674464 U CN 201921674464U CN 210720109 U CN210720109 U CN 210720109U
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Abstract
The utility model relates to an electrolytic cell for local electrochemistry research of L type sample belongs to electrochemistry electrolytic cell technical field. This electrolytic cell includes superstructure and substructure, and superstructure adopts the design of rectangular frame, and the slot is seted up respectively to superstructure's left side wall and back lateral wall, and the substructure is the cuboid structure, and the substructure is equipped with the recess, and superstructure and substructure are connected, inside formation electrolysis trough. The utility model discloses the slot of both sides wall can satisfy crooked metal sample and pass the electrolysis trough with 90, makes crooked metal sample's working face is in electrolyte solution, can test the influence that residual stress corrodes crooked metal sample.
Description
Technical Field
The utility model relates to an electrolytic cell for local electrochemistry research of L type sample belongs to electrochemistry electrolytic cell technical field.
Background
In the prior art, the electrolytic cells usually used for local electrochemical measurement are mostly only suitable for measuring the section of a columnar material or the surface of a plate; in the using process, the influence of the test residual stress on the corrosion of an L-shaped bent metal sample (L-shaped sample for short) is limited.
Chinese patent CN102183678A discloses a multifunctional electrolytic cell for scanning electrochemical microscope, which comprises a concave upper cover and a concave lower cover with threads I on the inner side, and a double-layer cylinder with threads II matching with the threads I at both ends and filled with electrolyte solution. The utility model discloses a through the isostructure of lower cover, can accomplish the experiment of three electrodes, four electrodes and more complicated system. The electrolytic cell is additionally provided with a double-layer cylinder for containing electrolyte solution, the structure is complex, the working electrode is arranged through a round hole, and the working surface is still the working surface of a columnar material (such as metal or alloy). In view of the above, it is necessary to develop a scanning electrochemical microscope electrolytic cell for L-shaped sample corrosion research.
Disclosure of Invention
To the not enough of prior art, the utility model provides an electrolytic bath for local electrochemistry research of L type sample, it can test the corruption influence of residual stress to L type sample.
The technical scheme of the utility model as follows:
the utility model provides an electrolytic bath for local electrochemistry of L type sample is studied, includes superstructure and substructure, and the superstructure adopts the design of rectangular frame, and the slot is seted up respectively to superstructure's left side wall and back lateral wall, and the substructure is the cuboid structure, and the substructure is equipped with the recess, and superstructure and substructure are connected, the inside electrolysis trough that forms of superstructure and substructure.
Preferably, a first round hole and a second round hole which are directly connected with the electrolytic cell are vertically embedded in the right side wall of the upper structure, and the first round hole and the second round hole are respectively used for placing a reference electrode and an auxiliary electrode.
Further preferably, the first round hole and the second round hole are communicated with the electrolytic cell through a rectangular channel arranged in the right side wall.
Preferably, the height of the first round hole and the second round hole is 17mm, and the diameter of the first round hole and the diameter of the second round hole are 4-6 mm.
Preferably, the front side wall of the upper structure is made of a transparent material, and the distance between the Pt microprobe and the sample of the scanning electrochemical microscope is monitored in an auxiliary mode through a window formed in the front side wall by using the long-focus microscope.
Preferably, four threaded holes are correspondingly formed in the two sides of the upper structure and the two sides of the lower structure, and the upper structure and the lower structure are fixedly connected through bolts.
Further preferably, a gasket is provided between the upper structure and the lower structure, and the shape of the gasket is the same as the shape of the cross section of the upper structure, thereby improving the sealing performance of the device.
Preferably, a groove is arranged in the middle of one side of the lower structure, the groove is a rectangular groove, the external dimension of the rectangular groove is as follows, and the length range is as follows: 20-24mm, width range: 12-16mm, height range: 4-5 mm.
Preferably, the external dimensions of the substructure are as follows: length range: 48-54mm, width range: 42-46mm, height range: 10-14 mm.
Preferably, the dimensions of the superstructure are as follows, length ranges: 48-54mm, width range: 42-46mm, height range: 18-24 mm; the dimensions of the rectangle enclosed by the framework of the superstructure are as follows, length ranges: 24-28mm, width range: 20-24 mm; the dimensions of the trenches are as follows, width ranges: 7-9mm, depth range: 3-4 mm.
The beneficial effects of the utility model reside in that:
1. the utility model discloses the slot of both sides wall can satisfy crooked metal sample and pass the electrolysis trough with 90, makes crooked metal sample's working face is in electrolyte solution, can test the influence that residual stress corrodes crooked metal sample.
2. The utility model discloses a distance between long focus microscope control Pt microprobe and the sample surface, and lateral wall observes the sample that awaits measuring before the accessible, and more accurate debugs and observes.
3. The utility model discloses a first round hole and second round hole are used for placing reference electrode and auxiliary electrode respectively, and working electrode is violently put in the electrolytic bath, have avoided because of working electrode inserts the sealed weeping problem that leads to not tight from the electrolytic bath below.
Drawings
Figure 1 is a top view of the superstructure of the present invention;
FIG. 2 is a top view of the substructure of the present invention;
wherein: 1. a lower structure; 2. a groove; 3. a superstructure; 4. a threaded hole; 5. a front side wall; 6. a left side wall; 7. a rear sidewall; 8. a right side wall; 9. a trench; 10. a first circular hole; 11. a second circular hole; 12. a rectangular channel.
Detailed Description
The present invention will be further described, but not limited to, by the following examples in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1-2, the present embodiment provides an electrolytic cell for local electrochemical research of L-shaped samples, which includes an upper structure 3 and a lower structure 1, wherein the upper structure 3 is designed as a rectangular frame, a left side wall 6 and a rear side wall 7 of the upper structure 3 are respectively provided with a groove 9, the lower structure 1 is a rectangular structure, the lower structure 1 is provided with a groove 2, the upper structure 3 is connected with the lower structure 1, an electrolytic cell is formed inside the upper structure 3 and the lower structure 1, both the lower structure 1 and the upper structure 3 are made of organic glass, a first circular hole 10 and a second circular hole 11 which are directly connected with the electrolytic cell are vertically embedded on a right side wall 8 of the upper structure 3, the first circular hole 10 and the second circular hole 11 are respectively used for placing a reference electrode and an auxiliary electrode, the first circular hole 10 and the second circular hole 11 are communicated with the electrolytic cell through a rectangular channel 12 arranged in the right side wall 8, the height of the first round hole and the second round hole is 17 mm.
An experimental method of an electrolytic cell for local electrochemical research of L-shaped samples comprises the following steps:
1. preparing a sample to be corroded and an electrolyte solution: processing a metal sample to be corroded into a strip sample, wherein the size of a gauge length section of the strip sample is matched with the size of a groove of the upper structure, the strip sample is bent into 90 degrees, and 1000#, 1200# and 16 # are sequentially usedGradually grinding 00# metallographic abrasive paper, polishing the bent part of the bent metal sample until the mirror surface is bright, washing the surface with high-purity water, and drying for later use; preparing an electrolyte solution, adding a redox mediator K to the electrolyte solution4Fe(CN)6The redox mediator is subjected to oxidation reaction on the Pt microprobe, and the reaction is
Generating an electrochemical reaction current;
2. mounting the sample and the electrode: two ends of a gauge length section of the bent metal sample are erected in grooves of the left side wall and the rear side wall of the upper structure, and the upper structure and the lower structure are fixedly sealed by using bolts; and a reference electrode and an auxiliary electrode are respectively arranged in the first round hole and the second round hole, the bent metal sample is a working electrode, the scale distance section of the bent metal sample in the electrolytic cell is sealed by a polytetrafluoroethylene tape in a sealing manner, and only 3mm sections of two sides of the bent part are respectively reserved to be in contact with electrolyte solution.
3. Installing and adjusting a probe: fixing a Pt microprobe on an X-Y-Z three-dimensional position controller, wherein the diameter of the Pt microprobe is 25 mu m, the X-Y-Z three-dimensional position controller consists of a fixed piezoelectric scanner and a movable mechanical cantilever, the Pt microprobe is enabled to be close to the bent part of the metal sample through the adjustment of the X-Y-Z three-dimensional position controller, and the distance between the Pt microprobe and the bent part of the metal sample is monitored through a long-focus microscope; then accurately adjusting the distance between the Pt microprobe and the bent metal sample by utilizing an approximation curve testing function in local electrochemical testing software installed on a computer;
4. adding an electrolyte solution into the electrolytic cell;
5. and respectively connecting the Pt microprobe, the bent metal sample, the reference electrode and the auxiliary electrode with a double potentiostat, and carrying out corrosion electrochemical experiment measurement.
Example 2:
the utility model provides an electrolytic cell for local electrochemistry research of L type sample, the structure is as in embodiment 1, the difference lies in, and superstructure's 3 preceding lateral wall 5 is transparent material, through the window that preceding lateral wall 5 formed, utilizes long focus microscope to carry out the auxiliary monitoring to the regulation and control of distance between scanning electrochemical microscope Pt microprobe and the sample, and preceding lateral wall 5 adopts the organic glass material preparation.
Example 3:
an electrolytic cell for local electrochemical research of an L-shaped sample is structurally as described in example 1, except that four threaded holes 4 are formed in two sides of an upper structure 3 and two sides of a lower structure 1 correspondingly, the upper structure 3 and the lower structure 1 are fixedly connected through bolts, a sealing gasket is arranged between the upper structure and the lower structure, the shape of the sealing gasket is the same as that of the cross section of the upper structure, and the tightness of the device is improved.
Example 4:
an electrolytic cell for local electrochemical study of L-shaped specimens, constructed as described in example 1, except that the lower structure 1 has a length of 48mm, a width of 42mm and a height of 10 mm; the length of the groove 2 is 20mm, the width is 12mm, and the height is 4 mm; the superstructure 3 is 48mm in length, 42mm in width and 18mm in height; the dimensions of the rectangle enclosed by the frame of the superstructure 3 are as follows, length 24mm, width 20 mm; the groove 9 has the following dimensions, width 7mm and depth 3 mm; the first circular hole 10 and the second circular hole 11 have a diameter of 4 mm.
Example 5:
an electrolytic cell for local electrochemical study of L-shaped specimens, constructed as described in example 1, except that the lower structure 1 has a length of 54mm, a width of 46mm and a height of 14 mm; the length of the groove 2 is 24mm, the width is 16mm, and the height is 5 mm; the superstructure 3 is 54mm in length, 46mm in width and 24mm in height; the dimensions of the rectangle enclosed by the frame of the superstructure 3 are as follows, length 28mm, width 24 mm; the dimensions of the groove 99 are as follows, width 9mm, depth 4 mm; the first circular hole 10 and the second circular hole 11 have a diameter of 6 mm.
Claims (9)
1. The utility model provides an electrolytic bath for local electrochemistry research of L type sample, its characterized in that includes superstructure and substructure, and the superstructure adopts the design of rectangular frame, and the slot is seted up respectively to superstructure's left side wall and back lateral wall, and the substructure is the cuboid structure, and the substructure is equipped with the recess, and superstructure and substructure are connected, and superstructure and substructure are inside to form the electrolysis trough.
2. The electrolytic cell for local electrochemical research of L-shaped samples according to claim 1, characterized in that a first round hole and a second round hole directly connected with the electrolytic cell are vertically embedded on the right side wall of the upper structure, and the first round hole and the second round hole are communicated with the electrolytic cell through a rectangular channel arranged in the right side wall.
3. The electrolytic cell for local electrochemical study of L-shaped specimens according to claim 2, characterized in that the height of the first and second circular holes is 17mm and the diameter of the first and second circular holes is 4-6 mm.
4. The electrolytic cell for local electrochemical research of L-shaped samples according to claim 1, wherein the front side wall of the upper structure is made of transparent material, and the long-focus microscope is used for carrying out auxiliary monitoring on the distance regulation between the Pt microprobe of the scanning electrochemical microscope and the sample through a window formed on the front side wall.
5. The electrolytic cell for the local electrochemical research of the L-shaped test sample according to claim 2, wherein four threaded holes are respectively formed on two sides of the upper structure and two sides of the lower structure, and the upper structure and the lower structure are fixedly connected through bolts.
6. An electrolytic cell for localized electrochemical studies of L-shaped specimens according to claim 5, characterized in that a gasket is provided between the upper structure and the lower structure, the gasket having the same shape as the cross-section of the upper structure.
7. The electrolytic cell for local electrochemical research of L-shaped samples according to claim 1, characterized in that a groove is provided at the middle position of one side of the lower structure, the groove is a rectangular groove, the external dimension of the groove is as follows, and the length range is as follows: 20-24mm, width range: 12-16mm, height range: 4-5 mm.
8. An electrolytic cell for localized electrochemical studies of L-shaped specimens as defined in claim 1 wherein the understructures have the following physical dimensions: length range: 48-54mm, width range: 42-46mm, height range: 10-14 mm.
9. The electrolytic cell for localized electrochemical studies of L-shaped specimens according to claim 1, characterized in that the dimensions of the superstructure are as follows, length ranges: 48-54mm, width range: 42-46mm, height range: 18-24 mm; the dimensions of the rectangle enclosed by the framework of the superstructure are as follows, length ranges: 24-28mm, width range: 20-24 mm; the dimensions of the trenches are as follows, width ranges: 7-9mm, depth range: 3-4 mm.
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| CN201921674464.5U CN210720109U (en) | 2019-10-09 | 2019-10-09 | Electrolytic cell for local electrochemical research of L-shaped sample |
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| CN201921674464.5U CN210720109U (en) | 2019-10-09 | 2019-10-09 | Electrolytic cell for local electrochemical research of L-shaped sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501281A (en) * | 2019-10-09 | 2019-11-26 | 山东大学 | A kind of electrolytic cell and its application for the research of L-type sample Local electrochemical |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501281A (en) * | 2019-10-09 | 2019-11-26 | 山东大学 | A kind of electrolytic cell and its application for the research of L-type sample Local electrochemical |
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Granted publication date: 20200609 Termination date: 20201009 |