Salt spray corrosion sample with tensile stress superposed on surface
By designing the pallet and rotatable rotary plate in salt spray corrosion samples, the tensile stress on the surface of the hot-rolled sheet is solved, and the tensile stress failure problem caused by clamping in existing tests is improved, and the controllability and accuracy of the test are improved.
Patent Information
- Application Number
- CN202420623166.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Hot-rolled sheets are prone to accelerate failure due to the superposition of electrochemical corrosion and stress corrosion in salt-containing environments, resulting in early breakage of the material and may cause safety accidents. Existing electrochemical corrosion tests cannot meet the needs of hot-rolled sheets to deal with actual corrosion, and materials with tensile stress on the surface are prone to damage the surface tensile stress due to clamping and pulling during the test.
A salt spray corrosion sample with superimposed tensile stress on the surface was designed. By installing a tray and a rotatable rotary plate on the sample body, the sample body is avoided from clamping the sample body, thereby protecting the tensile stress on the surface of the sample body and improving the controllability of the test.
The sample design effectively avoids surface tensile stress failure caused by clamping, improves the stability and controllability of the test, and can more accurately simulate the corrosion behavior of hot-rolled sheets in a salt-containing environment.
Smart Images
Figure CN222652681U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot-rolled plate corrosion testing, in particular to a salt spray corrosion test specimen with superimposed tensile stress on the surface. Background Art
[0002] With the progress of science and technology and the vigorous development of industry, hot-rolled plates are widely used in important fields such as the automotive industry, aerospace, and marine engineering. It can be said that steel carries the dreams of mankind, and plates lead us to go further. Although hot-rolled plates are used in different fields, they are inevitably exposed to salty environments during their service. Due to the electrochemical principle, the surface of the material is corroded to varying degrees. If the surface of the metal material is subjected to tensile stress, electrochemical corrosion may be superimposed on stress corrosion, and cracks may be generated and rapidly expanded, aggravating the failure of the material, and may eventually lead to premature fracture of the material, causing unnecessary safety accidents.
[0003] In recent years, with the in-depth development of science and technology, downstream users have also put forward higher requirements on the corrosion resistance of materials. Therefore, when stress corrosion and electrochemical corrosion are superimposed on the material, the harm to the material is far greater than the single electrochemical corrosion. A single electrochemical corrosion test cannot meet the use requirements of hot-rolled plates to cope with actual corrosion. In addition, materials with tensile stress on the surface are easily destroyed by clamping and pulling during the test process, affecting the stability of the test. For this reason, we propose a salt spray corrosion specimen with superimposed tensile stress on the surface. Utility Model Content
[0004] The utility model aims to provide a salt spray corrosion test specimen with superimposed tensile stress on the surface, so as to solve the problems raised in the above background technology.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a salt spray corrosion specimen with superimposed tensile stress on the surface, comprising:
[0006] A heating furnace, wherein a floor rail is laid at the opening of the heating furnace, a sample loading vehicle is arranged on the upper end of the floor rail via a pulley, and a sample body is arranged on the upper end of the sample loading vehicle;
[0007] A square pool is arranged at one end of the ground rail away from the heating furnace, a quenching tank is arranged at the upper end of the square pool, a scrubbing pool is arranged on one side of the square pool, an organic solvent is contained inside the scrubbing pool, a rotating seat is fixed on the upper surface of one side of the scrubbing pool, a rotating plate is connected to the inner side of the rotating seat through a rotating shaft, a handle is fixed on the outer wall of the end of the rotating plate away from the scrubbing pool, and a tray is fixed on the outer wall of the end of the rotating plate close to the scrubbing pool.
[0008] Furthermore, a sliding connection is formed between the sample loading vehicle and the ground rail, and a semi-enclosed structure is formed between the heating furnace and the sample body through the sample loading vehicle, and the size of the sample body is 150mm*70mm*10mm.
[0009] Furthermore, the quenching tank is symmetrically arranged with respect to the central axis of the square pool, and the quenching tank and the upper end surface of the sample loading vehicle are parallel to each other.
[0010] Furthermore, the temperature range of the organic solvent is 60°-120°, the tray is rotatably connected to the scrubbing pool via a rotating plate and a rotating seat, and the tray is consistent with the outer structure of the sample body.
[0011] Furthermore, the outer walls at both ends of the sample body are provided with lifting ears.
[0012] Furthermore, a threaded connection is formed between the lifting ears and the sample body, and the lifting ears are symmetrically arranged with respect to the central axis of the sample body.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The salt spray corrosion specimen with superimposed tensile stress on the surface is provided with a tray and a rotatable rotating plate, which immerses and lifts the specimen body in a scrubbing tank, avoids the use of a clamp or the like to clamp the specimen body, thereby preventing the tensile stress on the surface of the specimen body from being destroyed, and improves the test controllability of the specimen body during the salt corrosion test with tensile stress. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the main structure of the processing equipment of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the sample body of the utility model after processing;
[0017] Figure 3 It is a schematic diagram of the main structure of the scrubbing pool of the utility model.
[0018] In the figure: 1. Heating furnace; 2. Ground rail; 3. Sample loading vehicle; 4. Sample body; 5. Square pool; 6. Quenching tank; 7. Scrubbing pool; 8. Organic solvent; 9. Turntable; 10. Turntable; 11. Handle; 12. Tray; 13. Lifting ear. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] The utility model provides a salt spray corrosion specimen with surface superimposed tensile stress through improvement. Figure 1-Figure 3 , comprising: a heating furnace 1, a ground rail 2 is laid at the opening of the heating furnace 1, a sample loading vehicle 3 is arranged on the upper end of the ground rail 2 through a pulley, a sliding connection is formed between the sample loading vehicle 3 and the ground rail 2, a sample body 4 made of hot-rolled steel is arranged on the upper end of the sample loading vehicle 3, and the size of the sample body 4 is 150mm*70mm*10mm, and the heating furnace 1 forms a semi-enclosed structure between the sample loading vehicle 3 and the sample body 4, a square pool 5 is arranged at one end of the ground rail 2 away from the heating furnace 1, a quenching groove 6 is opened on the upper end of the square pool 5, the quenching groove 6 is symmetrically arranged about the central axis of the square pool 5, and the quenching groove 6 is parallel to the upper end surface of the sample loading vehicle 3, and the symmetrically arranged quenching groove 6 is convenient for quenching multiple groups of sample bodies 4 at the same time, so as to improve the consistency of the physical and chemical properties of the sample bodies 4 of the same batch during the experiment; a scrubbing pool 7 is arranged on one side of the square pool 5, and an organic solvent is contained in the scrubbing pool 7 8. The temperature range of the organic solvent 8 is 60°-120°. A rotating seat 9 is fixed on the upper surface of one side of the scrubbing pool 7. A rotating plate 10 is connected to the inner side of the rotating seat 9 through a rotating shaft. A handle 11 is fixed to the outer wall of the end of the rotating plate 10 away from the scrubbing pool 7. A tray 12 is fixed to the outer wall of the end of the rotating plate 10 close to the scrubbing pool 7. The tray 12 is rotatably connected to the scrubbing pool 7 through the rotating plate 10 and the rotating seat 9. The tray 12 is consistent with the outer structure of the sample body 4. The set tray 12 and the rotatable rotating plate 10 perform immersion and lifting operations on the sample body 4 in the scrubbing pool 7 to prevent workers from being scalded by the high-temperature organic solvent 8 when scrubbing the sample body 4. The lifting and immersion of the tray 12 can avoid the use of a clamp or the like to clamp the sample body 4, which causes the tensile stress on the surface of the sample body 4 to be destroyed, thereby improving the test controllability of the sample body 4 during the salt corrosion test of tensile stress.
[0021] See also Figure 2 A salt spray corrosion specimen with surface superimposed tensile stress comprises: the outer walls of both ends of a specimen body 4 are provided with lifting ears 13, a threaded connection is formed between the lifting ears 13 and the specimen body 4, and the lifting ears 13 are symmetrically arranged about the central axis of the specimen body 4, and the arranged lifting ears 13 facilitate the experimenter to lift the specimen body 4.
[0022] Working principle: For this type of salt spray corrosion specimen with superimposed tensile stress on the surface, the experimenter first places multiple specimen bodies 4 on the sample loading vehicle 3. The number of specimen bodies 4 is generally eight, and the specification size of the specimen body 4 is uniformly 150mm*70mm*10mm hot-rolled steel plate. The specimen body 4 slides on the ground rail 2, so that the specimen loading vehicle 3 brings the specimen body 4 into the inner side of the heating furnace 1 for heating. When the specimen body 4 is heated to the austenitizing temperature, it is kept warm for 30 minutes, and then the specimen loading vehicle 3 is pulled out of the heating furnace 1 and pushed to the side of the square pool 5. Then the staff pulls the specimen body 4 out of the specimen loading vehicle 3 and sends it to the quenching tank 6 symmetrically arranged on the square pool 5 for quenching, and finally obtains the specimen body 4 with martensitic structure. During the phase change, the volume of the sample body 4 will expand, so that the surface of the sample body 4 tends to open and presents a tensile stress state, so that the salt spray corrosion test of the sample body 4 with tensile stress on the surface can be carried out. Finally, before the test, the sample body 4 needs to be placed on the tray 12, and the tray 12 and the rotating plate 10 are rotated on the rotating seat 9 of the scrubbing tank 7 by operating the handle 11, so that the sample body 4 can be immersed in the organic solvent 8 at 60°-120° in the scrubbing tank 7, and then lifted out of the liquid for scrubbing, which is easy to operate and prevents the clamp from clamping and destroying the tensile stress on the surface of the sample body 4. After that, the two ends of the sample body 4 can be hoisted by fastener installation ears 13, and the salt spray corrosion test of the surface connection of the sample body 4 can be carried out at the same time.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A salt spray corrosion specimen with superimposed tensile stress on the surface, characterized in that: include: A heating furnace (1), wherein a floor rail (2) is laid at the opening of the heating furnace (1), a sample loading vehicle (3) is mounted on the upper end of the floor rail (2) via a pulley, and a sample body (4) is mounted on the upper end of the sample loading vehicle (3); A square pool (5) is arranged at one end of the ground rail (2) away from the heating furnace (1), a quenching tank (6) is provided at the upper end of the square pool (5), a scrubbing pool (7) is arranged on one side of the square pool (5), an organic solvent (8) is contained inside the scrubbing pool (7), a rotating seat (9) is fixed on the upper surface of one side of the scrubbing pool (7), a rotating plate (10) is connected to the inner side of the rotating seat (9) via a rotating shaft, a handle (11) is fixed on the outer wall of the end of the rotating plate (10) away from the scrubbing pool (7), and a tray (12) is fixed on the outer wall of the end of the rotating plate (10) close to the scrubbing pool (7).
2. The salt spray corrosion specimen with surface superimposed tensile stress according to claim 1, characterized in that: The sample loading vehicle (3) and the ground rail (2) are slidably connected, and the heating furnace (1) forms a semi-enclosed structure with the sample loading vehicle (3) and the sample body (4), and the size of the sample body (4) is 150 mm*70 mm*10 mm.
3. The salt spray corrosion specimen with surface superimposed tensile stress according to claim 1, characterized in that: The quenching groove (6) is symmetrically arranged with respect to the central axis of the square pool (5), and the quenching groove (6) and the upper end surface of the sample loading vehicle (3) are parallel to each other.
4. The salt spray corrosion specimen with surface superimposed tensile stress according to claim 1, characterized in that: The temperature range of the organic solvent (8) is 60°-120°. The tray (12) is rotatably connected to the scrubbing pool (7) via a rotating plate (10) and a rotating seat (9), and the tray (12) is consistent with the outer structure of the sample body (4).
5. The salt spray corrosion specimen with surface superimposed tensile stress according to claim 1, characterized in that: Lifting ears (13) are installed on the outer walls at both ends of the sample body (4).
6. The salt spray corrosion specimen with surface superimposed tensile stress according to claim 5, characterized in that: The lifting lug (13) is threadedly connected to the sample body (4), and the lifting lug (13) is symmetrically arranged with respect to the central axis of the sample body (4).