CN111351746A - Solution magnetizing device and metal sample corrosion method - Google Patents
Solution magnetizing device and metal sample corrosion method Download PDFInfo
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- CN111351746A CN111351746A CN202010212231.4A CN202010212231A CN111351746A CN 111351746 A CN111351746 A CN 111351746A CN 202010212231 A CN202010212231 A CN 202010212231A CN 111351746 A CN111351746 A CN 111351746A
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Abstract
The invention discloses a solution magnetizing device and a metal sample corrosion method, wherein the magnetizing device comprises a circulating water pump, a water inlet pipe, a water outlet pipe, a cuboid glass container, a magnet fixing frame and a magnet, the cuboid glass container is arranged in the magnet fixing frame, the magnet is arranged on the magnet fixing frame, one end of the water inlet pipe is connected with a water outlet of the circulating water pump, the other end of the water inlet pipe is inserted into the cuboid glass container, one end of the water outlet pipe is connected with a water inlet of the circulating water pump, and the other end of the water outlet pipe is inserted; the metal sample corrosion method comprises the following steps: measuring and recording the solution properties during the magnetization process; preparing solutions in different states; measuring and recording electrochemical corrosion data of metals in different environments and different solutions through an electrochemical workstation; the invention can be used for exploring the action mechanism of the magnetic field on the corrosion behavior of the metal material, and further distinguishing the action of the magnetic field on the charged particles and the influence of the change of the magnetic field on the property of the medium on the corrosion process.
Description
Technical Field
The invention relates to the technical field of metal corrosion, in particular to a solution magnetizing device and a metal sample corrosion method.
Background
The operation of marine economy, the development of marine science and technology, and the construction of marine engineering have risen to the strategic heights of China. However, marine metal materials used in complex seawater environments are highly susceptible to corrosion, resulting in a reduction in the safety and service life of the metal components. With the implementation of the national ocean strategy, electronic equipment in the ocean is more common, oil field development is more intensive, marine traffic is more frequent, various complex electromagnetic waves are released by the electronic equipment and the marine electronic equipment, and the electromagnetic field generated by the electromagnetic waves influences the ocean and the surrounding environment. Ocean corrosion media are complex and various, marine metal components are corroded by multi-factor interaction, the ion movement and substance exchange rules during corrosion of the metal components can be changed by adding an electromagnetic field, and a magnetic effect and a magnetic memory effect can be generated at the same time, so that the metal corrosion process becomes more complex due to the combined action of a magnetic field and a seawater medium.
At present, the research on the influence of the magnetic field on the corrosion process of the metal material in the seawater still mainly focuses on the action of the magnetic field on the material exchange and ion transportation in the corrosion process. However, the magnetic field has a certain effect on the corrosion medium, and further influences the corrosion behavior of the metal in service. Therefore, when the effect of the magnetic field on metal corrosion is researched, the effect of the magnetic field on the charged particles and the influence of the change of the property of the medium on the corrosion process are not distinguished, so that the action mechanism of the magnetic field on the corrosion cannot be disclosed.
Disclosure of Invention
The invention aims to provide a solution magnetizing device and a metal sample corrosion method, which aim to solve the problem that in the prior art, when the action of a magnetic field on metal corrosion is researched, the influence of the action of the magnetic field on charged particles and the influence of the change of the magnetic field on the property of a medium on a corrosion process are not distinguished, so that the action mechanism of the magnetic field on the corrosion cannot be disclosed.
In order to achieve the purpose, the invention provides the following technical scheme:
on one hand, the invention provides a solution magnetizing device which comprises a circulating water pump, a water inlet pipe, a water outlet pipe, a cuboid glass container, a magnet fixing frame and a magnet, wherein the cuboid glass container is arranged in the magnet fixing frame, the magnet is arranged on the magnet fixing frame, one end of the water inlet pipe is connected with a water outlet of the circulating water pump, the other end of the water inlet pipe is inserted into the cuboid glass container, one end of the water outlet pipe is connected with a water inlet of the circulating water pump, and the other end of the water outlet pipe is.
Furthermore, one end of the water inlet pipe is connected with a water outlet of the circulating water pump through a pagoda head, and the other end of the water inlet pipe is inserted into the upper part of the cuboid glass container and is fixed through a fixer at the top of the cuboid glass container.
Furthermore, one end of the water outlet pipe is connected with a water inlet of the circulating water pump through a pagoda head, and the other end of the water outlet pipe is inserted into the lower part of the cuboid glass container and is fixed through a fixer at the top of the cuboid glass container; the position of the water outlet pipe and the water inlet pipe is more favorable for the flowing circulation of the experimental medium solution in the solution magnetizing device, and the flowing solution can fully cut the induction line to magnetize the solution.
Further, the magnet fixing frame comprises two opposite iron plates, the cuboid glass container is arranged between the two iron plates, a first hole is formed in the center of each iron plate, and the magnet is arranged in the center of each iron plate and arranged on one side face, far away from the cuboid glass container, of each iron plate.
Further, the size of the magnet is larger than that of the first hole, so that the magnet can be fixed on the iron plate.
Further, four angular position departments of two iron plates correspond respectively and have seted up the second hole, wear to be equipped with the threaded rod in the second hole that corresponds on two iron plates, all are equipped with the nut on the threaded rod of every iron plate both sides, adjust the distance between two iron plates through adjusting nut, and then can adjust the distance between the magnet on two iron plates, change the magnetic field intensity between the magnet.
During the use, fill experiment medium solution in cuboid glass container and circulating water pump, open circulating water pump switch, make solution flow circulation in this magnetization unit, after certain time, solution cutting magnetic induction line is magnetized by certain degree.
In another aspect, the present invention provides a method for corroding a metal sample, comprising the steps of:
magnetizing the experimental medium solution by the solution magnetizing device, and measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of preset time in the magnetizing process;
stopping magnetization after the pH value and the conductivity value of the experimental medium solution are stable, and obtaining the completely magnetized experimental medium solution;
after the magnetization is stopped, continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and when the property of the experimental medium solution is recovered to a half, obtaining the experimental medium solution with the property recovered to a half after the magnetization is stopped;
continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and stopping measuring and recording when the property of the experimental medium solution is completely recovered to obtain the experimental medium solution with completely recovered property after the magnetization is stopped; the steps are used for testing the influence of the magnetic effect and the magnetic memory effect of the magnetic field on the property of the experimental medium solution;
and measuring and recording electrochemical corrosion data of the metal sample in unmagnetized experimental medium solution, completely magnetized experimental medium solution, half-recovered experimental medium solution after magnetization stopping and completely recovered experimental medium solution after magnetization stopping in a common environment and a magnetic field environment through an electrochemical workstation.
Compared with the prior art, the invention has the beneficial effects that:
according to the solution magnetizing device and the metal sample corrosion method provided by the invention, the influence rule of the magnetic effect and the magnetic memory effect of the magnetic field on the property of the experimental medium solution can be tested, and the influence of the magnetic field on the processes of material exchange, ion movement, medium property and the like in the metal corrosion process is analyzed, so that the influence of the action of the magnetic field on charged particles and the influence of the change of the magnetic field on the property of the experimental medium on the corrosion process are distinguished.
Drawings
Fig. 1 is a schematic structural diagram of a solution magnetizing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a magnet holder in a solution magnetization apparatus according to an embodiment of the present invention in a state;
fig. 3 is a schematic structural diagram of a magnet holder in a solution magnetization apparatus according to another state in an embodiment of the present invention;
FIG. 4 is a graph showing the change in pH and conductivity of a 3.5 wt.% NaCl solution under the influence of a magnetic field in a method for etching a metal coupon according to an embodiment of the present invention;
FIG. 5 is a Tafel plot and an impedance spectrum of pure aluminum in a 3.5 wt.% NaCl solution unmagnetized under normal environment and 0.4T magnetic field environment in a metal sample corrosion method provided by an embodiment of the invention;
fig. 6 is a Tafel plot and an impedance spectrum of pure aluminum in a 3.5 wt.% NaCl solution with no magnetization, full magnetization, half of the property recovery after stopping magnetization, and full property recovery in a metal sample corrosion method provided by an embodiment of the present invention.
In the figure: 1-magnet, 2-cuboid glass container, 3-circulating water pump, 4-water outlet pipe, 5-water inlet pipe, 6-fixer, 7-pagoda head, 8-magnet fixing frame, 9-iron plate, 10-threaded rod, 11-nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the solution magnetizing apparatus provided by the embodiment of the present invention includes a circulating water pump 3, a water inlet pipe 5, a water outlet pipe 4, a rectangular glass container 2, a magnet fixing frame 8 and a magnet 1, wherein the rectangular glass container 2 is disposed in the magnet fixing frame 8, the magnet 1 is disposed on the magnet fixing frame 8, one end of the water inlet pipe 5 is connected to a water outlet of the circulating water pump 3, the other end of the water inlet pipe is inserted into the rectangular glass container 2, one end of the water outlet pipe 4 is connected to a water inlet of the circulating water pump 3, and the other end of the water outlet.
The one end of inlet tube 5 links to each other through precious tower head 7 between the delivery port of circulating water pump 3, and the upper portion of cuboid glass container 2 is inserted to the inlet tube 5 other end to fix through fixer 6 at cuboid glass container 2 top.
One end of a water outlet pipe 4 is connected with a water inlet of the circulating water pump 3 through a pagoda head 7, and the other end of the water outlet pipe 4 is inserted into the lower part of the cuboid glass container 2 and is fixed through a fixer 6 at the top of the cuboid glass container 2; the positions of the water outlet pipe 4 and the water inlet pipe 5 are more favorable for the flowing circulation of the experimental medium solution in the solution magnetizing device, and the flowing solution can fully cut the induction line to magnetize the solution.
As shown in fig. 2 and 3, the magnet fixing frame 8 includes two opposite iron plates 9, the rectangular glass container 2 is disposed between the two iron plates 9, a first hole is disposed at a center position of the iron plate 9, and the magnet 1 is disposed at a center position of the iron plate 9 and disposed on a side surface of the iron plate 9 away from the rectangular glass container 2.
The magnet 1 is larger than the first hole, and the magnet 1 can be fixed to the iron plate 9.
The second hole has been seted up to four angular position departments of two iron plates 9 correspond respectively, wears to be equipped with threaded rod 10 in the second hole that corresponds on two iron plates 9, all is equipped with nut 11 on the threaded rod 10 of every iron plate 9 both sides, adjusts the distance between two iron plates 9 through adjusting nut 11, and then can adjust the distance between the magnet 1 on two iron plates 9, changes the magnetic field intensity between magnet 1.
When the device is used, the cuboid glass container 2 and the circulating water pump 3 are filled with experimental medium solution, the circulating water pump 3 is switched on, the solution circulates in the magnetizing device in a flowing mode, and after a certain period of time, the solution cuts the magnetic induction lines and is magnetized to a certain degree.
The embodiment of the invention provides a metal sample corrosion method, which comprises the following steps:
magnetizing the experimental medium solution by the solution magnetizing device, and measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of preset time in the magnetizing process;
stopping magnetization after the pH value and the conductivity value of the experimental medium solution are stable, and obtaining the completely magnetized experimental medium solution;
after the magnetization is stopped, continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and when the property of the experimental medium solution is recovered to a half, obtaining the experimental medium solution with the property recovered to a half after the magnetization is stopped;
continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and stopping measuring and recording when the property of the experimental medium solution is completely recovered to obtain the experimental medium solution with completely recovered property after the magnetization is stopped; the steps are used for testing the influence of the magnetic effect and the magnetic memory effect of the magnetic field on the property of the experimental medium solution;
and measuring and recording electrochemical corrosion data of the metal sample in unmagnetized experimental medium solution, completely magnetized experimental medium solution, half-recovered experimental medium solution after magnetization stopping and completely recovered experimental medium solution after magnetization stopping in a common environment and a magnetic field environment through an electrochemical workstation.
The following experiments were performed with 3.5 wt.% NaCl solution as the experimental medium solution:
magnetizing the 3.5 wt.% NaCl solution with the solution magnetizing apparatus; in the magnetization process, measuring the pH value and the conductivity value of the NaCl solution by a pH meter and a conductivity meter every 30 minutes, and recording data; after the pH value and the conductivity value of the NaCl solution are stable, taking down the magnet 1 in the solution magnetizing device, stopping the magnetizing process, and continuously measuring and recording the pH value and the conductivity value of the NaCl solution every 1 hour; the measurement and recording were stopped when the properties of the NaCl solution had completely recovered. The pH and conductivity curves of the 3.5 wt.% NaCl solution under the magnetic field are shown in fig. 4. As can be seen in fig. 4: along with the increase of the magnetization time, the pH value and the conductivity value of the NaCl solution are continuously increased and are stable after 8 hours; and then the magnet 1 is taken down, the pH value and the conductivity value of the NaCl solution are continuously reduced along with the increase of time, and the pH value and the conductivity value of the NaCl solution are reduced to the state before magnetization after 12 hours.
According to the data, the NaCl solution magnetized for 8 hours, and the NaCl solutions magnetized for 6 hours and 12 hours after the magnetization was stopped were obtained by the solution magnetizing device.
The Tafel plot and impedance spectroscopy of pure aluminum in an unmagnetized 3.5 wt.% NaCl solution in normal environment and 0.4T magnetic field environment were tested by an electrochemical workstation and the results are shown in FIG. 5. As can be seen from FIG. 5, under the magnetic field environment, the corrosion potential of pure aluminum is increased, the corrosion current density is reduced, and the radius of the impedance spectrum is increased, which shows that the magnetic field can reduce the corrosion sensitivity and corrosion rate of pure aluminum to some extent.
The Tafel plot and impedance spectroscopy of pure aluminum in 3.5 wt.% NaCl solutions that were unmagnetized, fully magnetized, and recovered for 6 hours and 12 hours after stopping magnetization were tested by the electrochemical workstation and the results are shown in FIG. 6. As can be seen from fig. 6, the corrosion current density and the impedance spectrum radius of pure aluminum tested in the magnetized NaCl solution were both larger compared to the unmagnetized NaCl solution, indicating that the corrosion rate of pure aluminum was faster in the magnetized solution; after the magnetization treatment was stopped, in the NaCl solutions with the property recovery time of 6 hours and 12 hours, the corrosion current density and the impedance spectrum radius of pure aluminum were smaller and the corrosion rate was slower as the solution property recovery time was longer, indicating that the corrosion rate of pure aluminum decreased as the solution property recovery time was longer.
Finally, solution magnetization can accelerate the corrosion rate of pure aluminum, but the magnetic field environment can slow down the corrosion rate of pure aluminum, so that for pure aluminum corroded in 3.5 wt.% NaCl solution, the effect of the magnetic field on charged particles is stronger than the influence of the change of the magnetic field on the property of the medium solution on the corrosion process.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A solution magnetization apparatus, characterized in that: including circulating water pump (3), inlet tube (5), outlet pipe (4), cuboid glass container (2), magnet mount (8) and magnet (1), magnet mount (8) are arranged in cuboid glass container (2), on magnet mount (8) are arranged in magnet (1), inlet tube (5) one end links to each other with the delivery port of circulating water pump (3), and the other end inserts in cuboid glass container (2), outlet pipe (4) one end links to each other with the water inlet of circulating water pump (3), and the other end inserts in cuboid glass container (2).
2. A solution magnetization unit according to claim 1, characterized in that: the utility model discloses a solar water heater, including inlet tube (5), inlet tube (5) one end and circulating water pump (3) are connected through precious tower head (7) between the delivery port, the upper portion of cuboid glass container (2) is inserted to the inlet tube (5) other end to fixer (6) through cuboid glass container (2) top are fixed.
3. A solution magnetization unit according to claim 1, characterized in that: the water circulating device is characterized in that one end of the water outlet pipe (4) is connected with a water inlet of the water circulating pump (3) through a tower head (7), the other end of the water outlet pipe (4) is inserted into the lower portion of the cuboid glass container (2) and is fixed through a fixer (6) at the top of the cuboid glass container (2).
4. A solution magnetization unit according to claim 1, characterized in that: magnet mount (8) include two relative iron plates (9), cuboid glass container (2) are arranged in between two iron plates (9), the central point department of putting of iron plate (9) has seted up first hole, magnet (1) set up in the central point department of putting of iron plate (9) to on iron plate (9) keep away from the side of cuboid glass container (2).
5. A solution magnetization unit according to claim 4, characterized in that: the size of the magnet (1) is larger than that of the first hole.
6. A solution magnetization unit according to claim 4, characterized in that: the second hole has been seted up to four angular position departments of two iron plates (9) correspondence respectively, wears to be equipped with threaded rod (10) in the second hole that corresponds on two iron plates (9), all is equipped with nut (11) on threaded rod (10) of every iron plate (9) both sides, adjusts the distance between two iron plates (9) through adjusting nut (11).
7. A method for corroding a metal sample is characterized by comprising the following steps:
magnetizing the test medium solution by the solution magnetizing apparatus according to any one of claims 1 to 6, and measuring and recording the pH value and conductivity value of the test medium solution at predetermined time intervals during the magnetizing;
stopping magnetization after the pH value and the conductivity value of the experimental medium solution are stable, and obtaining the completely magnetized experimental medium solution;
after the magnetization is stopped, continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and when the property of the experimental medium solution is recovered to a half, obtaining the experimental medium solution with the property recovered to a half after the magnetization is stopped;
continuously measuring and recording the pH value and the conductivity value of the experimental medium solution at intervals of a preset time, and stopping measuring and recording when the property of the experimental medium solution is completely recovered to obtain the experimental medium solution with completely recovered property after the magnetization is stopped;
and measuring and recording electrochemical corrosion data of the metal sample in unmagnetized experimental medium solution, completely magnetized experimental medium solution, half-recovered experimental medium solution after magnetization stopping and completely recovered experimental medium solution after magnetization stopping in a common environment and a magnetic field environment through an electrochemical workstation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010212231.4A CN111351746A (en) | 2020-03-24 | 2020-03-24 | Solution magnetizing device and metal sample corrosion method |
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| CN202010212231.4A CN111351746A (en) | 2020-03-24 | 2020-03-24 | Solution magnetizing device and metal sample corrosion method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005338046A (en) * | 2004-05-24 | 2005-12-08 | Shige Ishikawa | Nondestructive inspection apparatus for metallic conduit |
| CN209307007U (en) * | 2018-09-29 | 2019-08-27 | 杭州哈慈实业有限公司 | A kind of magnetizing assembly |
-
2020
- 2020-03-24 CN CN202010212231.4A patent/CN111351746A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005338046A (en) * | 2004-05-24 | 2005-12-08 | Shige Ishikawa | Nondestructive inspection apparatus for metallic conduit |
| CN209307007U (en) * | 2018-09-29 | 2019-08-27 | 杭州哈慈实业有限公司 | A kind of magnetizing assembly |
Non-Patent Citations (3)
| Title |
|---|
| LIU HW: "Synergistic Inhibition Effect of Magnetic Field and Inhibitors against Carbon Steel Corrosion in CO2-Saturated Oilfield-Produced Water", 《INDUSTRIAL AND ENGINEERING CHEMISTRY RESEARCH》 * |
| 杨康 等: "磁化对油田水腐蚀的影响评价研究", 《2019油气田勘探与开发国际会议论文集》 * |
| 田光 等: "磁场对金属腐蚀的实验研究", 《管道技术与设备》 * |
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Application publication date: 20200630 |