CN209759593U - Metal material anti-corrosion device under seawater environment based on magnetic field assistance - Google Patents
Metal material anti-corrosion device under seawater environment based on magnetic field assistance Download PDFInfo
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- CN209759593U CN209759593U CN201920380128.3U CN201920380128U CN209759593U CN 209759593 U CN209759593 U CN 209759593U CN 201920380128 U CN201920380128 U CN 201920380128U CN 209759593 U CN209759593 U CN 209759593U
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Abstract
the metal material anticorrosion device based on magnetic field assistance in the seawater environment comprises a power supply, wherein the negative electrode of the power supply is connected with a metal matrix, and the power supply is used for providing the cathode potential of the metal matrix; the negative electrode of the power supply is connected with the auxiliary anode; a magnetic field generator for applying a magnetic field to the metal matrix to make the metal matrix contain Fe2+The corrosion products of (a) adsorb to the surface, inhibiting corrosion of the metal substrate. In seawater, the cathode potential of the metal matrix is provided by a power supply, the auxiliary anode and the seawater electrolyte form a current loop, and a magnetic field is applied to the metal matrix by a magnetic field generating device, so that the metal matrix contains Fe2+Corrosion products ofThe substance is adsorbed on the surface to inhibit the corrosion of the metal matrix, so that the metal matrix is protected. The utility model discloses not only can effectively restrain the metal matrix in the sea water, like the corruption of iron-based steel equipment, can prolong the life of metal matrix equipment moreover, increase the maintenance cycle of equipment.
Description
Technical Field
The utility model relates to a metallic material's protection technical field under the sea water environment specifically is a metallic material anticorrosive device under sea water environment based on magnetic field is supplementary.
Background
in recent years, the marine industry in China is rapidly developed, and a large amount of metal equipment such as a water delivery pipeline of a seawater pumped storage power station, an oil delivery pipeline, a cross-sea bridge steel structure and the like is inevitably used in the sea. Seawater is a medium-strong corrosive dielectric solution, the corrosivity of which far exceeds that of river water and rainwater, and the high conductivity characteristic enables the action range of a corrosion battery to be large. Metal equipment is in a severe corrosion environment such as ocean for a long time, and is easy to corrode and damage. These damages bring great troubles to our lives, even economic losses and safety problems.
Cathodic protection technology is most widely used in marine corrosion protection. Cathodic protection is an electrochemical protection method which provides a certain amount of electron current to the metal to be protected in a certain mode to carry out cathodic polarization, so that the potential of the metal is negatively shifted to be in a thermodynamic stable region, and the metal is reduced or prevented from being corroded due to oxidation reaction. However, corrosion of the ocean is still severe and needs improvement.
Disclosure of Invention
In view of the above circumstances, the present invention provides a metal material corrosion prevention device based on magnetic field assistance in seawater environment, that is, based on the existing cathode protection technology, a magnetic field is applied around the metal matrix as the cathode. After the corrosion reaction on the surface of the metal substrate, the corrosion product contains Fe2+The ions have magnetic moments and contain Fe under the action of a magnetic field2+Can adsorb on the surface of the metal substrate, thereby inhibiting further corrosion of the metal substrate.
the utility model discloses the technical scheme who takes does:
Metal material anticorrosive device under sea water environment based on magnetic field is supplementary includes:
the cathode of the power supply is connected with the metal matrix, and the power supply is used for providing the cathode potential of the metal matrix;
The anode of the power supply is connected with the auxiliary anode;
a magnetic field generator for applying a magnetic field to the metal matrix to make the metal matrix contain Fe2+The corrosion products of (a) adsorb to the surface, inhibiting corrosion of the metal substrate.
the magnetic field generating device is an electromagnet.
The magnetic field generating device is formed by applying an electrified lead on the surface of a metal substrate.
the current passed by the electromagnet and the electrified conducting wire adopts pulse type, direct current type or alternating current type.
The magnetic field generating device is a permanent magnet.
the magnetic field generating device applies a magnetic field to the metal substrate, or a position easy to corrode the metal substrate, or a position where the metal substrate is connected with other alloy equipment.
The metal matrix is iron-based steel or iron-based alloy.
A method for preventing corrosion of metal material in seawater based on magnetic field assistance includes providing metal matrix cathode potential by power supply in seawater to assistThe assistant anode and the seawater electrolyte form a current loop, and a magnetic field is applied to the metal matrix through a magnetic field generating device, so that the metal matrix contains Fe2+The corrosion products of (a) adsorb to the surface, inhibiting corrosion of the metal substrate, so that the metal substrate is protected.
The magnetic field applied by the magnetic field generating device is an electromagnetic field, and the application method of the electromagnetic field comprises the following steps: placing an electromagnet on the surface of a metal substrate; or the energized wire is wound or laid on the surface of the metal matrix to be protected and generates a magnetic field.
The magnetic field generating device is a permanent magnet and is placed on the part needing to be protected on the surface of the metal matrix.
The utility model relates to a metal material anticorrosive device under sea water environment based on magnetic field is supplementary, the technological effect as follows:
1: not only can effectively inhibit the corrosion of metal matrix in seawater, such as iron-based steel equipment, but also can prolong the service life of the metal matrix equipment and prolong the maintenance period of the equipment.
2: compared with the traditional cathode protection measures, the utility model discloses better inhibition the corruption of metal matrix equipment in the sea water. Compared with methods of adding bactericides and the like, the method of the utility model does not pollute the marine environment and is beneficial to the sustainable development of the marine industry.
3: the utility model discloses magnetic field generating device can adopt the multiple magnetic field mode of appllying, if produce the magnetic field through electro-magnet or permanent magnet, can select different modes of appllying according to actual conditions.
4: the utility model discloses an application range is more extensive. For large marine facilities with large areas, such as: the gate of the harbor entrance and exit, the submarine transportation pipeline, the bottom of the ship and the like can adopt large-area laying of wires to generate an electromagnetic field, thereby realizing the magnetic field assisted cathode protection technology. Moreover, for places with difficult power supply or local marine facilities with small area, the permanent magnet can be adopted to realize the magnetic field auxiliary-based cathode protection technology. When the permanent magnet is adopted to generate a magnetic field, an external power supply is not needed, and energy is saved.
5: the utility model discloses can adopt the permanent magnet in iron-based steel, or other alloy equipment linking department, or the place of easily corroding, can not only be anticorrosive but also install simply.
Drawings
The invention will be further explained with reference to the following figures and examples:
Fig. 1 is a schematic diagram of the device of the present invention.
Fig. 2 is a schematic diagram of the device of the present invention, which adopts an electromagnet to apply a magnetic field.
fig. 3 is a schematic diagram of the device of the present invention applying a magnetic field by using an electrical coil winding method.
Fig. 4 is the utility model discloses the device adopts the circular telegram coil tiling mode to apply magnetic field mode sketch map.
Fig. 5 is a schematic diagram of the magnetic field applying mode of the device of the present invention using permanent magnets.
Detailed Description
Principle analysis:
Cathodic protection is an electrochemical protection method which provides a certain amount of electron current to the metal to be protected in a certain mode to carry out cathodic polarization, so that the potential of the metal is negatively shifted to be in a thermodynamic stable region, and the metal is reduced or prevented from being corroded due to oxidation reaction. The utility model discloses on the basis of current cathodic protection technique, apply the magnetic field around the iron-based steel as the negative pole. After the corrosion reaction of the surface of the iron-based steel, the Fe in the corrosion product2+The ions have magnetic moments and contain Fe under the action of a magnetic field2+The corrosion products of (a) may be adsorbed on the surface of the iron-based steel material, thereby inhibiting further corrosion of the iron-based steel material. The magnetic field application may be by an electromagnet, or may be by a permanent magnet. The corrosion prevention method can not only slow down the corrosion of iron-based steel, but also is green and environment-friendly, and does not endanger the ecological balance of the ocean. This is further illustrated by the following three examples:
Example 1:
As shown in fig. 1 and 2, the metal material corrosion prevention device based on magnetic field assistance in seawater environment comprises:
The power supply 3, the negative pole of the power supply 3 is connected with the metal substrate 1, and the power supply 3 is used for providing the cathode potential of the metal substrate 1;
An auxiliary anode 2, the anode of a power supply 3 is connected with the auxiliary anode 2,
The auxiliary anode 2 is used to transfer the protection current provided by the power supply 3 device to the surface of the metal substrate 1 to be protected via seawater. The auxiliary anode 2 material should have the following properties: good conductivity and high electrochemical activity; low consumption rate and long life; the strength is enough, and the device is not easy to damage; the weight is light, and the carrying and the installation are easy; the processing and forming are easy, and the cost performance is high; the anode material and the corrosion product are environment-friendly and pollution-free. The auxiliary anode 2 is made of waste steel, graphite, magnetic iron oxide, high-silicon cast iron, lead alloy, platinum, mixed metal oxide and conductive polymer.
The power supply 3 adopts a direct current power supply and mainly comprises a rectifier and a constant potential rectifier. The rectifier is the simplest cathode protection power supply device, can rectify external alternating current into low-voltage direct current, and can realize continuous adjustment of output current and voltage. The constant potential rectifier can automatically adjust the output current according to the change of external conditions, so that the protected metal matrix 1 is always in a set protection potential range. The potentiostat mainly used in the engineering includes a thyristor potentiostat, a magnetic saturation potentiostat, a high-power transistor potentiostat and a switching power supply potentiostat. In special cases, power supplies 3 such as solar cells, wind generators, tidal power generators may also be used for impressed current cathodic protection.
A magnetic field generating device for applying a magnetic field to the metal substrate 1 to make the metal substrate 1 contain Fe2+The corrosion products of (a) adsorb to the surface, inhibiting corrosion of the metal substrate 1.
The magnetic field generating device is an electromagnet 4, and the current adopted by the electromagnet 4 comprises: pulsed, direct, alternating current.
The magnetic field applies a magnetic field to the metal substrate 1, or to a corrosion-prone location of the metal substrate 1, or to a connection of the metal substrate 1 to another alloy device. This not only effectively controls corrosion but also saves costs.
the metal matrix 1 is iron-based steel or iron baseAnd (3) alloying. When the corrosion reaction occurs on the surface of the metal substrate 1, the corrosion reaction is caused by Fe in the corrosion product2+The ions have magnetic moments and contain Fe under the action of a magnetic field2+Will adsorb on the surface of the metal substrate 1, thereby inhibiting further corrosion of the metal substrate 1.
Example 2:
As shown in fig. 1, 3 and 4, the metal material corrosion prevention device based on magnetic field assistance in seawater environment comprises:
The power supply 3, the negative pole of the power supply 3 is connected with the metal substrate 1, and the power supply 3 is used for providing the cathode potential of the metal substrate 1;
And an auxiliary anode 2, wherein the anode of the power supply 3 is connected with the auxiliary anode 2, and the auxiliary anode 2 is used for transferring the protective current provided by the power supply 3 to the surface of the metal substrate 1 to be protected through seawater. The auxiliary anode 2 material should have the following properties: good conductivity and high electrochemical activity; low consumption rate and long life; the strength is enough, and the device is not easy to damage; the weight is light, and the carrying and the installation are easy; the processing and forming are easy, and the cost performance is high; the anode material and the corrosion product are environment-friendly and pollution-free.
The auxiliary anode 2 is made of waste steel, graphite, magnetic iron oxide, high-silicon cast iron, lead alloy, platinum, mixed metal oxide and conductive polymer.
The power supply 3 adopts a direct current power supply and mainly comprises a rectifier and a constant potential rectifier. The rectifier is the simplest cathode protection power supply device, can rectify external alternating current into low-voltage direct current, and can realize continuous adjustment of output current and voltage. The constant potential rectifier can automatically adjust the output current according to the change of external conditions, so that the protected metal matrix 1 is always in a set protection potential range. The potentiostat mainly used in the engineering includes a thyristor potentiostat, a magnetic saturation potentiostat, a high-power transistor potentiostat and a switching power supply potentiostat. In special cases, power supplies 3 such as solar cells, wind generators, tidal power generators may also be used for impressed current cathodic protection.
a magnetic field generating device for applying a magnetic field to the metal substrate 1 to make the metal substrate 1 contain Fe2+Corrosion products of (2) are adsorbed onSurface, inhibiting corrosion of the metal substrate 1.
The magnetic field generating device is composed of a metal substrate 1 surface applied electrified lead 5. The current applied to the current-carrying conductor 5 includes: pulsed, direct, alternating current.
FIG. 3 shows a way of winding an electrified wire 5 on the surface of the metal substrate 1, which can protect the metal substrate 1 in a large area and apply Fe2+adsorbing on the surface of the metal matrix 1; and the charged particles flowing along the metal matrix 1 in the seawater can make spiral motion under the action of Lorentz force, so that the interaction between seawater ions and the metal matrix 1 is delayed.
Fig. 4 shows a method of laying the current-carrying leads 5 on the surface of the metal substrate 1, which does not require the surface form of the metal substrate 1, is easy to lay, and can protect the metal substrate 1 having a large area.
the magnetic field applies a magnetic field to the metal substrate 1, or to a corrosion-prone location of the metal substrate 1, or to a connection of the metal substrate 1 to another alloy device. This not only effectively controls corrosion but also saves costs.
The metal matrix 1 is iron-based steel or iron-based alloy. When the corrosion reaction occurs on the surface of the metal substrate 1, the corrosion reaction is caused by Fe in the corrosion product2+The ions have magnetic moments and contain Fe under the action of a magnetic field2+Will adsorb on the surface of the metal substrate 1, thereby inhibiting further corrosion of the metal substrate 1.
Example 3:
As shown in fig. 1 and 5, the metal material corrosion prevention device based on magnetic field assistance in seawater environment comprises:
The power supply 3, the negative pole of the power supply 3 is connected with the metal substrate 1, and the power supply 3 is used for providing the cathode potential of the metal substrate 1;
and an auxiliary anode 2, wherein the negative pole of the power supply 3 is connected with the auxiliary anode 2, and the auxiliary anode 2 is used for transferring the protection current provided by the power supply 3 to the surface of the metal substrate 1 to be protected through seawater. The auxiliary anode 2 material should have the following properties: good conductivity and high electrochemical activity; low consumption rate and long life; the strength is enough, and the device is not easy to damage; the weight is light, and the carrying and the installation are easy; the processing and forming are easy, and the cost performance is high; the anode material and the corrosion product are environment-friendly and pollution-free. The auxiliary anode 2 is made of waste steel, graphite, magnetic iron oxide, high-silicon cast iron, lead alloy, platinum, mixed metal oxide and conductive polymer.
the power supply 3 adopts a direct current power supply and mainly comprises a rectifier and a constant potential rectifier. The rectifier is the simplest cathode protection power supply device, can rectify external alternating current into low-voltage direct current, and can realize continuous adjustment of output current and voltage. The constant potential rectifier can automatically adjust the output current according to the change of external conditions, so that the protected metal matrix 1 is always in a set protection potential range. The potentiostat mainly used in the engineering includes a thyristor potentiostat, a magnetic saturation potentiostat, a high-power transistor potentiostat and a switching power supply potentiostat. In special cases, power supplies 3 such as solar cells, wind generators, tidal power generators may also be used for impressed current cathodic protection.
A magnetic field generating device for applying a magnetic field to the metal substrate 1 to make the metal substrate 1 contain Fe2+the corrosion products of (a) adsorb to the surface, inhibiting corrosion of the metal substrate 1.
The magnetic field generating device is a permanent magnet 6 and is placed on the part to be protected on the surface of the metal matrix 1. The device is suitable for marine facilities with difficult power supply or small area. The permanent magnet 6 material includes: alloy permanent magnetic material, rare earth permanent magnetic material and ferrite permanent magnetic material.
The metal matrix 1 is iron-based steel or iron-based alloy. When the corrosion reaction occurs on the surface of the metal substrate 1, the corrosion reaction is caused by Fe in the corrosion product2+the ions have magnetic moments and contain Fe under the action of a magnetic field2+will adsorb on the surface of the metal substrate 1, thereby inhibiting further corrosion of the metal substrate 1.
Based on the method for preventing corrosion of metal materials in seawater environment of the above embodiment 1, embodiment 2 or embodiment 3,
In seawater, a power supply 3 supplies negative current to a protected metal matrix 1, the positive electrode of the power supply 3 is connected with an auxiliary anode 2, the negative electrode is connected with the protected metal matrix 1, and the protection current reaches from the auxiliary anode 2 through seawater electrolyteForming a current loop on the surface of the protected metal substrate 1 (the protection electron current continuously replenishes the surface of the protected metal substrate 1 to prevent the protected metal substrate 1 from losing electrons and being oxidized, the auxiliary anode 2 continuously absorbs electrons from seawater and is continuously supplied to a power supply to form a loop), and applying a magnetic field to the metal substrate 1 through a magnetic field generating device to enable the metal substrate 1 to contain Fe2+The corrosion products of (a) are adsorbed on the surface, inhibiting corrosion of the metal substrate 1, so that the metal substrate 1 is protected.
Claims (7)
1. Metal material anticorrosive device under sea water environment based on magnetic field is supplementary, its characterized in that includes: the negative pole of the power supply (3) is connected with the protected metal substrate (1), and the power supply (3) is used for providing the cathode potential of the metal substrate (1);
The anode (2) is connected with the anode (2) of the power supply (3), and the anode (2) is used for transferring the protective current provided by the power supply (3) to the surface of the metal substrate (1) to be protected through seawater;
A magnetic field generating device for applying a magnetic field to the metal substrate (1) to make the metal substrate (1) contain Fe2+The corrosion products of (2) are adsorbed on the surface, inhibiting corrosion of the metal substrate (1).
2. The metal material corrosion prevention device based on magnetic field assistance in the seawater environment of claim 1, wherein: the magnetic field generating device is an electromagnet (4).
3. The metal material corrosion prevention device based on magnetic field assistance in the seawater environment of claim 1, wherein: the magnetic field generating device is composed of a metal matrix (1) and an energizing lead (5).
4. The metal material anticorrosion device based on magnetic field assistance in seawater environment of claim 3, wherein: the electrified lead (5) is wound or paved on the metal matrix (1).
5. The metal material corrosion prevention device based on magnetic field assistance in the seawater environment of claim 1, wherein: the magnetic field generating device is a permanent magnet (6).
6. The metal material corrosion prevention device based on magnetic field assistance in the seawater environment of claim 1, wherein: the magnetic field generating device applies a magnetic field to the metal substrate (1), or a position easy to corrode of the metal substrate (1), or a joint of the metal substrate (1) and other alloy equipment.
7. the metal material corrosion prevention device based on magnetic field assistance in the seawater environment of claim 1, wherein: the metal matrix (1) is iron-based steel or iron-based alloy.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109778196A (en) * | 2019-03-21 | 2019-05-21 | 南方电网调峰调频发电有限公司 | Metal material anti-corrosive apparatus and method under briny environment based on magnetic field auxiliary |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109778196A (en) * | 2019-03-21 | 2019-05-21 | 南方电网调峰调频发电有限公司 | Metal material anti-corrosive apparatus and method under briny environment based on magnetic field auxiliary |
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Effective date of registration: 20200115 Address after: 510635 room 2201, Longkou East Road, Tianhe District, Guangzhou, Guangdong, 2201 Patentee after: Southern power grid peak modulation FM Power Generation Co., Ltd. Address before: 443002, 8, University Road, Xiling District, Hubei, Yichang Co-patentee before: Southern power grid peak modulation FM Power Generation Co., Ltd. Patentee before: Three Gorges University |