CN217605612U - Sample rack for corrosion test - Google Patents
Sample rack for corrosion test Download PDFInfo
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- CN217605612U CN217605612U CN202221276476.4U CN202221276476U CN217605612U CN 217605612 U CN217605612 U CN 217605612U CN 202221276476 U CN202221276476 U CN 202221276476U CN 217605612 U CN217605612 U CN 217605612U
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Abstract
The utility model relates to a sample rack for corrosion test, which comprises a frame, a fastening bolt and a pressing head; the frame is provided with a suspension hole, a plurality of fastening bolts are arranged on the frame along the circumferential direction, the fastening bolts are connected with the frame through threads, and bolt heads of the fastening bolts face to the center of the frame; the end part of the bolt head of the fastening bolt is provided with a pressing head which is of a hemispherical structure. Sample frame simple structure, convenient to use can avoid calculating the influence of accuracy because of sample drilling and centre gripping to sample surface corrosion appearance objectivity and corrosion rate, is applicable to the corrosion test of various material samples such as metal, nonmetal.
Description
Technical Field
The utility model relates to an experimental auxiliary device that uses especially relates to a sample frame for corrosion test.
Background
In the corrosion resistance evaluation and corrosion mechanism research process of materials, various corrosion tests are indispensable. Generally, corrosion tests can be divided into two types, namely coupon corrosion tests in actual environments and accelerated corrosion tests under laboratory conditions. In various corrosion tests, a sample rack is indispensable equipment, and the structure of the sample rack usually has a remarkable influence on the corrosion appearance, the corrosion rate evaluation result and the corrosion behavior of a tested sample.
In all kinds of corrosion tests, the common sample placing mode comprises sample drilling suspension, sample drilling rear bolt fastening, clamping groove clamping fixing, pressing plate or bolt clamp fastening and the like. However, the above methods all have certain disadvantages, and often affect the accuracy and objectivity of the test result in practical application.
The Chinese patent application with the publication number of CN 111781131A discloses a high-precision intelligent multifunctional periodic infiltration corrosion test box, wherein a sample is placed in a drilling suspension mode, the sample is periodically immersed in a test solution, the test solution is inevitably remained in a drilling hole at the moment, after the sample is separated from the test solution, the solution in the drilling hole gradually escapes and is dried to form sagging, the corrosion appearance around the drilling hole is influenced, and the objectivity of the whole corrosion appearance of the sample is further influenced.
The Chinese patent application with publication number CN 107505254A discloses a multi-zone marine environment comprehensive simulation test device, wherein a sample is fixed on a sample rack in a bolt fastening mode after drilling, and residual solution at a fastening nut flows down along the surface of the sample to easily form sagging on the surface of the sample in the test process, so that the objectivity of the corrosion appearance of the sample is influenced; meanwhile, the fastening nut shields part of the tested surface of the sample, so that the accuracy of the subsequent corrosion rate calculation result is influenced.
The Chinese patent application with publication number CN 110987782A discloses a multi-factor comprehensive marine environment simulation corrosion test device and method, wherein a sample is fixed in a clamping mode, so that the influence of drilling holes on the surface of the sample on a test result is avoided, but the area of the back of the sample is shielded to influence the calculation result of the corrosion rate.
Chinese patent application publication No. CN 206192850U discloses "a sample holder for environmental corrosivity class classification", in which the sample is also fixed by clamping, and the back of the sample is not shielded, but the bottom of the frame and the side support base of the sample holder still shield the front surface of the sample to be tested to a certain extent.
Chinese patent application publication No. CN 104634683A discloses a "sample washing device", in which a sample is clamped and fixed by two clamping plates, and the clamping plates are pressed on the peripheral edges of the sample. Obviously, the sample holder cannot be used for corrosion rate estimation due to the shielding of the sample surface.
Disclosure of Invention
The utility model provides a sample frame for corrosion test, its simple structure, convenient to use can avoid measuring and calculating the influence of accuracy because of sample drilling and centre gripping to sample surface corrosion appearance objectivity and corrosion rate, is applicable to the corrosion test of various material samples such as metal, nonmetal.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a sample frame for corrosion test comprises a frame, a fastening bolt and a pressing head; the frame is provided with a suspension hole, a plurality of fastening bolts are arranged on the frame along the circumferential direction, the fastening bolts are connected with the frame through threads, and bolt heads of the fastening bolts face to the center of the frame; the end part of the bolt head of the fastening bolt is provided with a pressing head which is of a hemispherical structure.
The frame is a rectangular frame, and the middle part of each edge is provided with a fastening bolt.
And a permanent magnet is arranged in the compression head.
The frame and the fastening bolts are made of rigid materials, and the surfaces of the frame and the fastening bolts are coated with low-surface-energy materials.
The low surface energy material is polytetrafluoroethylene.
Compared with the prior art, the beneficial effects of the utility model are that:
the device has the advantages of simple structure and convenient use, can avoid the influence on the objectivity of the surface corrosion appearance and the accuracy of the corrosion rate measurement and calculation of the sample due to the drilling and clamping of the sample, and is suitable for the corrosion test of various material samples such as metal, nonmetal and the like.
Drawings
Fig. 1 is a schematic structural diagram of a sample holder for corrosion test according to the present invention.
In the figure: 1. frame 2, hanging hole 3, fastening bolt 4, pressing head 5, sample 6 and permanent magnet
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the sample holder for corrosion test of the present invention comprises a frame 1, a fastening bolt 3 and a pressing head 4; the frame 1 is provided with a hanging hole 2, a plurality of fastening bolts 3 are arranged on the frame 1 along the circumferential direction, the fastening bolts 3 are connected with the frame 1 through threads, and bolt heads of the fastening bolts 3 face to the center of the frame 1; the bolt head end part of the fastening bolt 3 is provided with a pressing head 4, and the pressing head 4 is of a hemispherical structure.
The frame 1 is a rectangular frame, and the middle part of each edge is provided with a fastening bolt 3.
And a permanent magnet 6 is arranged in the compression head 4.
The frame 1 and the fastening bolts 3 are made of rigid materials, and the surfaces of the frame and the fastening bolts are coated with low-surface-energy materials.
The low surface energy material is polytetrafluoroethylene.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.
[ examples ] A
In this embodiment, the sample holder is composed of a frame 1 and a fastening bolt 3. The frame 1 is a square frame, and four corners of the frame 1 are respectively provided with hanging holes 2 for hanging the sample rack; the middle parts of the four sides of the frame 1 are respectively provided with a fastening bolt 3. The fastening bolt 3 is connected with the frame 1 through threads and is used for propping against the edge of the sample 5 from four directions after being screwed tightly so as to fix the sample 5 in the frame 1.
In this embodiment, the frame 1 and the fastening bolts 3 are made of stainless steel material, and the surface thereof is coated with polytetrafluoroethylene, so that the test solution is not easy to remain thereon.
The pressing head 4 arranged at the end part of the bolt head of the fastening bolt 3 is of a hemispherical structure, and the permanent magnet 6 is arranged in the pressing head and used for reinforcing and fixing a ferromagnetic material sample, so that the magnetic force of the pressing head is small, and the corrosion test process cannot be influenced.
After the sample 5 is fixed, the sample holder and the sample 5 are integrally fixed on an indoor and outdoor acceleration and actual environment corrosion test device through the hanging hole 2 to carry out a corrosion test.
In this example, the sample 5 is a square sample fitted to the frame 1.
In the embodiment 1, a sample 5 to be tested is placed in a frame 1, and the tested surface of the sample 5 faces to two sides of the frame 1; tightening the fastening bolt 3 causes the clamping head 4 to be pressed against the edge of the test piece 5. After the sample 5 is fixed, the sample frame and the sample 5 are integrally fixed on a periodic infiltration corrosion testing machine through the hanging holes 2 at the four corners of the frame 1 to carry out an indoor accelerated corrosion test.
In example 2, the procedure for fixing the sample 5 was the same as in example 1, and after the sample 5 was fixed, the entire sample holder and the sample 5 were immersed in the test solution by hanging them through the hanging holes 2 to conduct the full immersion corrosion test.
In example 3, the procedure for fixing the sample 5 was the same as in example 1, and after the sample 5 was fixed, the entire sample holder and the sample 5 were placed on a sample holder of a salt spray tester to perform a salt spray corrosion test.
In example 4, the procedure for fixing the sample 5 was the same as in example 1, and after the sample 5 was fixed, the entire sample holder and the sample 5 were placed on a sample holder of an ultraviolet aging tester to perform an ultraviolet aging test.
In example 5, the procedure for fixing the sample 5 was the same as in example 1, and after the sample 5 was fixed, the entire sample holder and the sample 5 were fixed to the sample holder exposed to the atmosphere through the hanging hole 2 in the frame 1, and the corrosion test in the actual atmospheric environment was performed.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.
Claims (5)
1. A sample holder for corrosion test is characterized by comprising a frame, a fastening bolt and a pressing head; the frame is provided with a suspension hole, a plurality of fastening bolts are arranged on the frame along the circumferential direction, the fastening bolts are connected with the frame through threads, and bolt heads of the fastening bolts face to the center of the frame; the end part of the bolt head of the fastening bolt is provided with a pressing head which is of a hemispherical structure.
2. The sample holder for the corrosion test according to claim 1, wherein the frame is a rectangular frame, and a fastening bolt is arranged in the middle of each side.
3. The sample holder for corrosion testing of claim 1, wherein a permanent magnet is disposed in said clamping head.
4. The sample holder for corrosion testing of claim 1, wherein said frame and said fastening bolts are made of rigid material and coated with low surface energy material.
5. The sample holder for corrosion testing of claim 4, wherein said low surface energy material is polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221276476.4U CN217605612U (en) | 2022-05-26 | 2022-05-26 | Sample rack for corrosion test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221276476.4U CN217605612U (en) | 2022-05-26 | 2022-05-26 | Sample rack for corrosion test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605612U true CN217605612U (en) | 2022-10-18 |
Family
ID=83570195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221276476.4U Active CN217605612U (en) | 2022-05-26 | 2022-05-26 | Sample rack for corrosion test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605612U (en) |
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2022
- 2022-05-26 CN CN202221276476.4U patent/CN217605612U/en active Active
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