CN112877699A

CN112877699A - Metal anticorrosion device based on Hall effect

Info

Publication number: CN112877699A
Application number: CN202110039837.7A
Authority: CN
Inventors: 王江; 任忠鸣; 陈超越; 朱万厉; 帅三三; 胡涛; 玄伟东
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-06-01
Anticipated expiration: 2041-01-13
Also published as: CN112877699B

Abstract

The invention relates to the technical field of metal protection, in particular to a metal anti-corrosion device based on a Hall effect. The invention provides a metal anti-corrosion device based on a Hall effect, which comprises a metal conductor, a first magnet and a second magnet, wherein the metal conductor is positioned on a corrosion surface of a metal to be protected; the first magnet and the second magnet are synonym magnets. According to the invention, through the arrangement, after the movement of electrons generated between the metal and the electrolyte is subjected to the Lorentz force, the movement direction of the electrons is deflected and returns to the metal conductor, so that the corrosion behavior of the metal in the electrolyte solution is effectively inhibited, and the protection effect on the metal is realized.

Description

Metal anticorrosion device based on Hall effect

Technical Field

The invention relates to the technical field of metal protection, in particular to a metal anti-corrosion device based on a Hall effect.

Background

From the thermodynamic point of view, the metal is in an unstable state, and it has a tendency to react with the surrounding medium to become metal ions, thereby reducing its own energy, so the process of metal corrosion is a spontaneous process. The corrosion of metal mainly includes two types of chemical corrosion and electrochemical corrosion, and the chemical corrosion refers to corrosion caused by a simple chemical reaction of metal, such as high-temperature corrosion and corrosion in a non-aqueous solution without conductivity. Electrochemical corrosion refers to corrosion caused by electrochemical oxidation-reduction when metal is in contact with an electrolyte; wherein, seawater is used as an electrolyte solution and has extremely strong corrosivity to metal materials.

At present, the common method for preventing metals from being corroded in seawater is mainly a cathodic protection technology, namely, the metals in seawater are polarized by a cathode so as to be protected. The cathodic protection method is mainly divided into two types, one is a sacrificial anodic protection method, as is known, the activities of different types of metals are different, and in order to protect a certain metal, a metal which is more active than the metal can be selected as an anode, so that the protected metal can be protected; the other is a cathodic protection technology of forced impressed current, namely, cathodic current is applied to the protected metal to make the metal cathodically react, and when the metal cathodically reacts to the anode reaction equilibrium potential of the protected body, the anode reaction of the protected body basically stops, thereby achieving the purpose of protection. The two methods both need to consume other energy to achieve the purpose of corrosion prevention of metal in seawater, and the corrosion prevention means has certain limitation.

Disclosure of Invention

The invention aims to provide a metal anti-corrosion device based on a Hall effect, which can delay the corrosion of metal, prolong the service time of the metal, save materials and save electric energy.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a metal anti-corrosion device based on a Hall effect, which comprises a metal conductor, a first magnet and a second magnet, wherein the metal conductor is positioned on a corrosion surface of a metal to be protected;

the first magnet and the second magnet are synonym magnets.

Preferably, a distance between the first magnet and the metal conductor is equal to a distance between the second magnet and the metal conductor.

Preferably, the metal conductor, the first magnet and the second magnet are located on the same straight line.

Preferably, the number n of the metal conductors is greater than or equal to 1, and the total number m of the first magnets and the second magnets is greater than or equal to n + 1.

Preferably, the direction of the lines of magnetic induction generated between the first magnet and the second magnet is parallel to the horizontal plane direction of the electrolytic solution that corrodes the metal to be protected.

Preferably, the first magnet and the second magnet generate a magnetic field with a strength of 10⁰～10¹T。

Preferably, the material of the metal conductor is the same as that of the metal to be protected.

The invention provides a metal anti-corrosion device based on a Hall effect, which comprises a metal conductor, a first magnet and a second magnet, wherein the metal conductor is positioned on a corrosion surface of a metal to be protected; the first magnet and the second magnet are synonym magnets. According to the invention, due to the arrangement, after the movement of electrons generated between the metal and the electrolyte solution corroding the metal to be protected is subjected to the Lorentz force, the movement direction of the electrons is deflected and returns to the metal conductor, so that the corrosion behavior of the metal in the electrolyte solution is effectively inhibited, and the protection effect on the metal is realized.

Drawings

FIG. 1 is a schematic structural diagram of a metal anticorrosion device based on Hall effect according to the invention;

fig. 2 is a schematic structural view of a metal plate to be protected in embodiment 1 after a magnet is disposed thereon;

FIG. 3 is a graph showing anodic polarization curves of example 1 and comparative example 1;

wherein, 1-metal to be protected, 2-metal conductor, 3-first magnet, 4-second magnet, 5-seawater electrolyte solution, 6-moving direction of electron, and 7-metal conductor plate.

Detailed Description

The invention provides a metal anti-corrosion device based on a Hall effect, which comprises a metal conductor, a first magnet and a second magnet, wherein the metal conductor is positioned on a corrosion surface of a metal to be protected; the first magnet and the second magnet are synonym magnets.

In the present invention, the material of the metal to be protected is preferably alloy steel, and the specific composition of the alloy steel is not limited in any way, and alloy steel composition well known to those skilled in the art can be adopted in the present invention.

As a specific embodiment of the invention, the distance between the first magnet and the second magnet is the same as the radius of the current direction which is finally formed by the circular motion of the electrons under the action of the Lorentz force.

As a specific embodiment of the present invention, a distance between the first magnet and the metal to be protected is equal to a distance between the second magnet and the metal to be protected; the distance is preferably the distance between the parallel planes with the shortest distance between the first magnet and the metal to be protected, or the distance between the parallel planes with the shortest distance between the second wedding contact and the metal to be protected.

In the invention, the distance between the first magnet or the second magnet and the metal to be protected is preferably 0.03-0.05 m, and more preferably 0.04 m.

In the present invention, the length, width and height of the first magnet or the second magnet are preferably 10 to 30mm independently, and the magnetic induction is preferably 1 to 4T, more preferably 1.5T.

As a specific embodiment of the present invention, the metal conductor is a metal conductor plate, the metal conductor plate is provided with grooves, and different name magnets are placed in two adjacent grooves; the size of the groove is preferably the same as the size of the magnet; the distance between two adjacent grooves is preferably the same as the radius of the current direction formed by the electrons making circular motion under the action of Lorentz force.

As an embodiment of the present invention, the metal conductor, the first magnet, and the second magnet are located on the same straight line.

As an embodiment of the present invention, a material of the metal conductor is the same as a material of the metal to be protected.

As an embodiment of the invention, the number n of the metal conductors is more than or equal to 1, and the total number m of the first magnet and the second magnet is more than or equal to n + 1.

As an embodiment of the present invention, a direction of lines of magnetic induction generated between the first magnet and the second magnet is parallel to a horizontal plane direction of an electrolyte solution that corrodes the metal to be protected.

As an embodiment of the invention, the magnetic field intensity generated by the first magnet and the second magnet is 10⁰～10¹T, preferably 1.5T.

In the present invention, the strength of the magnetic field is related to the sizes of the metal conductor, the first magnet and the second magnet, the type of the electrolyte and the type of the metal. In the present invention, said 10⁰～10¹The magnetic field intensity of T is that the magnetic field intensity is that the height of the first magnet and the second magnet from the bottom of the electrolyte is equal to the height of the metal conductor from the bottom of the electrolyte, the height is recorded as R, the radius of the current direction which is finally formed when electrons do circular motion under the action of Lorentz force is R

Where V is the velocity of the electron, which depends on the interaction between the metal and the electrolyte, m is the mass of the electron, and q is the charge amount of the electron. Based on the above assumption, the magnetic field strength between the first magnet and the second magnet is 10⁰～10¹T。

The metal corrosion prevention device based on hall effect according to the present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.

Example 1

As shown in figure 2 of the drawings, in which,

selecting a metal conductor plate with a groove, wherein the width and the depth of the groove are respectively 30mm multiplied by 10 mm; the distance between two adjacent grooves is 80 mm; the metal conductor plate is made of a low-alloy high-strength steel plate;

respectively placing a first magnet and a second magnet in two adjacent grooves, and controlling the distance between the first magnet and the second magnet to be 80 mm; the first magnet is 30mm multiplied by 10mm, and the second magnet is 30mm multiplied by 10 mm; the magnetic induction intensity of the first magnet is 1.5T, and the magnetic induction intensity of the second magnet is 1.5T; the magnetic induction intensity of the first magnet and the second magnet is about 1.5T;

and arranging the metal to be protected (the material is low-alloy high-strength steel, and the size is 5mm multiplied by 5mm) in the middle of the first magnet and the second magnet to obtain the metal anti-corrosion device.

Comparative example 1

Taking a metal conductor plate with a groove, wherein the width and the depth of the groove are respectively 30mm multiplied by 10 mm; the distance between two adjacent grooves is 80 mm; the width of the bulge between every two adjacent grooves is 30 mm; the metal conductor plate is made of a steel plate;

and arranging the metal to be protected right in the middle of the first magnet and the second magnet to obtain the metal anti-corrosion device.

Test example

The anodic polarization curves of example 1 and comparative example 1 were tested by the following procedure: the method adopts a three-electrode system, an auxiliary electrode is a platinum sheet, a reference electrode is saturated calomel, a working electrode is the metal to be protected in the anti-corrosion device, the working electrode is polished smoothly and flatly by abrasive paper before an experiment, electrochemical impedance spectrum measurement is carried out under an open-circuit potential, the peak value of an alternating current excitation signal is 5mV, and the frequency range is 10⁵-10²Hz, the polarization curve scan rate was 1 mV/s. And (3) immersing the steel plate electrode into a crude salt solution with the mass concentration of 3.5%, and starting an electrochemical test after the system is stable to obtain a potentiodynamic polarization curve test result. (ii) a Under the test conditions shown in fig. 3 (in which no magnetic field indicates comparative example 1 and a magnetic field indicates example 1), it can be seen from fig. 3 that the corrosion of the metal by the electrolyte solution is reduced after the magnetic field is applied in example 1.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A metal anti-corrosion device based on Hall effect, characterized in that it comprises a metal conductor located on the corrosion surface of the metal to be protected, and a first magnet and a second magnet located on opposite sides of the metal conductor;

The first magnet and the second magnet are synonymous magnets.

2 . The metal anti-corrosion device according to claim 1 , wherein the distance between the first magnet and the metal to be protected is equal to the distance between the second magnet and the metal to be protected. 3 .

3. The metal anti-corrosion device according to claim 1 or 2, wherein the metal conductor, the first magnet and the second magnet are located on the same straight line.

4 . The metal anti-corrosion device according to claim 3 , wherein the number of the metal conductors is n≧1, and the total number of the first magnets and the second magnets is m≧n+1. 5 .

5 . The metal anti-corrosion device according to claim 4 , wherein the direction of the magnetic induction line generated between the first magnet and the second magnet is parallel to the direction of the horizontal plane of the electrolyte solution corroding the metal to be protected. 6 .

6 . The metal anti-corrosion device according to claim 5 , wherein the strength of the magnetic field generated by the first magnet and the second magnet is 10 ⁰ to 10 ¹ T. 7 .

7 . The metal anti-corrosion device according to claim 1 , wherein the material of the metal conductor is the same as that of the metal to be protected. 8 .