JP3092582B2 - Corrosion protection method for metal members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing corrosion of corrosive substances.
About the law. For more details,
Generated by the conversion of energy into electrical energy
Corrosive substances, especially when piezoelectric or pyroelectric
A static external force without vibration and / or rotation
The present invention relates to a method for preventing a metal member from being heated. [0002] 2. Description of the Related Art
As a method of preventing corrosion, oxygen that causes corrosion,
Consider blocking chemical reaction itself such as pH and dissolved components
The fact is that the following measures have been taken. However,
Measures to prevent the chemical reaction itself, such as the application of rust preventive paint
The fact is that even with cloth, corrosion still progresses
is there. Therefore, an object of the present invention is to provide a novel corrosion protection for corrosive substances.
Is to provide a way. [0003] SUMMARY OF THE INVENTION The present inventor has developed a
I have been studying the mechanism of corrosion below
Of course, substances are subject to any kind of external stress
The mechanical energy generated by this external stress.
Energy is converted to electrical energy, which
Food, and the electrical
Energy is transferred to the material using low-energy AC power.
Field (electric field) or / and alternating magnetic field (magnetic field) or static magnetic field
(Magnetic field), or AC electric field (electric field) and DC electric field
(Electric field)
It has been found that corrosion of articles is prevented. (1) in FIG.
The electric circuit shown in the figure interrupts the external electric field for this experiment.
Stainless steel shield box made to cut
(S) Insulated and fixed sample (glass, rubber, etc.)
The test sample was grounded without insulation and fixed.
Ground one end of the sample without a resistor, and connect an oscilloscope to the other end.
This circuit is a shield box
1 (3) and FIG.
(4) It can be replaced as shown in the figure. And figure
As shown in FIG. 1 (2), the space d extends from the ground electrode (1).
The sample (2) is placed at a distance from
Exist. The piezoelectricity and pyroelectricity generated in sample (2)
An electric circuit is formed through the air layer. FIG. 1 (2)
In the figure, the space d is illustrated as approaching,
In practice there is considerable distance. This is
The air layer is ionized, resulting in corrosive substances
This means that the generated piezoelectricity and pyroelectricity will be transmitted to the domain,
Oxygen ions are adsorbed by such a biphasic electrical phenomenon.
In addition, the polarity is reversed and hydrogen is released, causing corrosion.
Means to understand. (Note) Figure 1 (1) and Figure 1
(2) The electrical phenomena occurring in FIG.
(4) It was confirmed that this also occurred in the figure. Furthermore, the present inventor
Means that the piezoelectricity and pyroelectricity have a crystal structure,
Not only that, even those with an amorphous structure
And found. The present invention has been completed based on these findings.
Which can generate piezoelectricity and / or pyroelectricity
Controls piezoelectricity and / or pyroelectricity generated in edible substances
A method of preventing the corrosive substance from being corroded.
You. That is, the present invention provides vibration and / or
Is external force due to rotation and / or static external force without heat
And / or an anticorrosion method for a metal member subjected to heating. (1) Static external force without vibration and / or rotation (external
Receiving external force on metal members that receive stress
Control the piezoelectricity generated in the metal member
Thus, the corrosion generated on the metal member due to the external force is reduced.
Corrosion prevention method of metal member to preventIn the metal member
As a method of controlling generated piezoelectricity, the metal member
AC electric field (electric field), AC magnetic field (magnetic field) or
Applies a static magnetic field (magnetic field), or AC electric field (electric field) and DC
Metal characterized by simultaneous application of an electric field
Corrosion protection method for components. (2) subject to static heating without vibration and / or rotation
The metal member is heated by receiving the heat.
By controlling the pyroelectricity generated in the material, the heating
Metal that prevents corrosion occurring on the metal member due to
Corrosion protection method for componentsIn the above, pyroelectricity generated in the metal member
As a method of controlling air, an external
AC electric field (electric field), AC magnetic field (magnetic field) or static magnetic field (magnetic field)
Field) or an AC electric field (electric field) and a DC electric field (electric field)
Corrosion protection of metal members characterized by simultaneously applying
Law. (3) Static external force without vibration and / or rotation (external
Stress) and the external force and
Piezoelectricity generated in the metal member by being heated and
By controlling the pyroelectricity, the
Corrosion prevention method for metal members to prevent corrosion occurring on metal members
Law, The piezoelectricity and pyroelectricity generated in the metal member
As a method of controlling the outside of the metal member
AC electric field (electric field), AC magnetic field (magnetic field) or static magnetic field (magnetic
Field) or an AC electric field (electric field) and a DC electric field (electric field)
Corrosion protection of metal members characterized by simultaneously applying
Law. (4) Metal members are silver, iron, steel, stainless steel, copper, true
Brass, nickel silver, phosphor bronze, aluminum, duralumin,
It is characterized by being one of zinc, lead or solder
SaidItems (1) to (3)Gold according to any one of the above
Corrosion prevention method for metal members. (5) Static without vibration and / or rotation
Metal parts that are subject to excessive heating
Control the pyroelectricity generated in the metal member
Therefore, the corrosion generated on the metal member due to the heating can be reduced.
In the method for preventing corrosion of a metal member, the metal member
As a method of controlling generated pyroelectricity, the metal member
It is characterized by applying an AC electric field (electric field) from outside
Subject to static heating without vibration and / or rotation
Corrosion protection method for metal members. (6) subject to static heating without vibration and / or rotation
Receiving the external force on the metal member
By controlling the pyroelectricity generated in the material, the heating
Metal that prevents corrosion occurring on the metal member due to
In a method for preventing corrosion of a member, a pyroelectric
As a method of controlling air, an external
Vibrations characterized by applying an alternating magnetic field (magnetic field)
Metal members subjected to static heating without rotation and / or rotation
Anticorrosion method. (7) Receive static heating without vibration and / or rotation
The metal member is heated by receiving the heat.
By controlling the pyroelectricity generated in the material, the heating
Metal that prevents corrosion occurring on the metal member due to
In a method for preventing corrosion of a member, a pyroelectric
As a method of controlling air, an external
Vibration characterized by applying a static magnetic field (magnetic field)
And / or to prevent metal members subjected to static heating without rotation
Eating method. (8) subject to static heating without vibration and / or rotation
The metal member is heated by receiving the heat.
By controlling the pyroelectricity generated in the material, the heating
Metal that prevents corrosion occurring on the metal member due to
In a method for preventing corrosion of a member, a pyroelectric
As a method of controlling air, an external
AC electric field (electric field) and DC electric field (electric field) are applied simultaneously
Static without vibration and / or rotation
Corrosion protection method for metal members subjected to typical heating. (9) Static without vibration and / or rotation
Metal members that are subject to excessive external force (external stress) and heat,
The metal member is generated by receiving the external force and heating.
By controlling piezoelectricity and pyroelectricity, the external force
Metal that prevents corrosion occurring on the metal member due to
In a method for preventing corrosion of a member, a piezoelectric member generated on the metal member
As a method of controlling gas and pyroelectricity, the metal member
And applying an AC electric field (electric field) from outside
Static external force and heating without rotating vibration and / or rotation
Corrosion protection method for metal members subjected to heat. (10) Static external force without vibration and / or rotation and
The external force and the heat
To control the piezoelectricity and pyroelectricity generated in the metal member.
By controlling the external force and heating
Corrosion protection method for metal member to prevent corrosion occurring on metal member
In the above, the piezoelectricity and pyroelectricity generated in the metal member are
As a control method, the metal member is externally exchanged.
A vibration characterized by applying a flowing magnetic field (magnetic field) and / or
Or metal parts subject to static external force and heating without rotation
Corrosion prevention method of the material. (11) Receive static external force without vibration and / or rotation.
Metal members that are exposed to the external force and heat
Controlling the piezoelectricity and pyroelectricity generated in the metal member.
And the metal member caused by the external force and the heating
Method of corrosion prevention of metal parts to prevent corrosion occurring on steel
To control the piezoelectricity and pyroelectricity generated in the metal member.
As a method, a static magnetic field is applied to the metal member from outside.
(Vibration and / or time) characterized by applying a (magnetic field)
Protection of metal members subjected to static external force and heating without rolling
Eating method. (12) Static external force without vibration and / or rotation and
The external force and the heat
To control the piezoelectricity and pyroelectricity generated in the metal member.
By controlling the external force and heating
Corrosion protection method for metal member to prevent corrosion occurring on metal member
In the above, the piezoelectricity and pyroelectricity generated in the metal member are
As a control method, the metal member is externally exchanged.
Simultaneous application of flowing electric field (electric field) and DC electric field (electric field)
Characterized by static without vibration and / or rotation
An anticorrosion method for metal members subjected to external force and heating. (13) Metal material is silver, iron, steel, stainless steel, copper, true
Brass, nickel silver, phosphor bronze, aluminum, duralumin,
It is characterized by being one of zinc, lead or solder
The metal according to any one of the above (1) to (12),
Corrosion protection method for members. Note that the above items (1) to (13)
Static external force or heating without vibration and / or rotation of the load;
Alternatively, metal members that receive external force and heat are usually
It was installed in. [0007] BEST MODE FOR CARRYING OUT THE INVENTION When stress is applied to an article,
The momentum of the position change at the bell turned into electrical energy
Are piezoelectric or pyroelectric, and the present invention
An external electric field (electric field)
Field), AC magnetic field (magnetic field), or static magnetic field (magnetic field)
Or an AC electric field (electric field) and a DC electric field (electric field)
To control the electrical energy to reduce the anticorrosion effect.
It is something that can be demonstrated. Generation of piezoelectric or pyroelectricity
Is guided from the generator with a coaxial cable, etc.
As a result of the observation at the
Therefore, even if it is small,
The order of occurrence is actually large. About this
1 (1) and FIG. 1 (2).
1 (3) of FIG. 1 and FIG.
(4) It can be confirmed according to the figure. So continuous to the center point
Piezoelectric generated when an external force that can generate electricity is applied
Gas or pyroelectricity is not negligible and
It can occur not only on the surface but also in the deep part. Generated inside corrosive substances
Piezoelectric or pyroelectricity is generated even if the surface is not corroded.
Gas in which generated electricity comes into contact with corrosive substances at its critical surface
Ionization, resulting in electrical reactions, electrochemical reactions
Reaction occurs, triggering corrosion. At the same time, electrical phenomena
Reaction or electric reaction between
Gas-chemical reactions occur, which in turn trigger corrosion.
You. In the present invention, corrosive substances are piezoelectric, pyroelectric,
Cause corrosion by electrical energy such as
Yes, for example iron, stainless steel, solder, brass, aluminum
Metals such as nickel and copper, ceramics such as tiles, glass, etc.
External stresses such as polymers, plastics, paints, etc.
When the constituent molecules are mechanically deformed, electrical energy is generated
What is born. In particular, this time, the present inventor
The material may generate piezoelectricity or pyroelectricity due to external force or heating.
And among such non-crystalline materials,
Apply the method of the present invention to metals that are likely to cause corrosion.
You. Piezoelectric or pyroelectricity is generated in the above general materials
Experiments, and the piezoelectric and pyroelectric generated
Qi causes corrosion, and
An experiment that confirmed that the anticorrosion method of the present invention was effective is described below.
Shown in However, experiments on corrosion and anti-corrosion effects
I went only. All experiments were performed at room temperature. A. Confirmation experiment of generation of piezoelectricity Zinc-plated iron plate (thickness 0.3 mm, length 70 x width 20 mm)
Is used as a sample to form a measurement circuit shown in FIG.
Piezoelectricity is generated in the sample by hitting the sample
Make sure you do. Details for configuring this measurement circuit
The detailed condition values are as follows. The sample is held in a vise, and insulation is provided between the sample and the vise.
With glass for sheeting (sheet thickness 6.8mm, size 40x
65 mm). Sample holding state by vice
Indicates that 40 mm of the total length of 70 mm of the sample is
30mm from the clamp surface of the vise with the tip free
It is in a protruding state. Electromagnetic and electrical signals from outside that cause measurement errors
In order to eliminate species disturbance as much as possible, shield box
(SUS430, plate thickness 1.0mm, size 450 × 21
(0 × 255 mm). The shield box
Is grounded to the ground. The vice holding the sample is inside the shield box.
It is fixed to the wall with an L-shaped bracket, and it is conducted and becomes the same potential.
ing. The oscilloscope electrode is 20m from the side of the sample
m and provided an air gap. With the connection of the measurement circuit to the sample as described above,
5 from the free end of the protruding side of the material in the direction of extension of the longitudinal axis.
0 mm apart, a glass lock was placed on the end face of the sample.
Approximately 1.5kgf using a rod (300mm x 9mm)
~ Applied a load of 1.7kgf instantaneously
At this time, as shown in FIG.
Voltage waveform rises up to 2.5mV, then about 2ms
Decayed monotonically during ec. According to the above experiment, zinc
The property that a drawing plate generates electricity (piezoelectricity) by hitting
It was confirmed to have. Also, for general materials outside
Also in the same experiment, generation of piezoelectricity was confirmed. B. Confirmation experiment of generation of pyroelectricity Silicon steel plate (plate thickness 1.0 mm, length 250 x width 20 m
m) is used as a sample to construct the measurement circuit shown in Fig. 1 (2).
And by heating the sample, piezoelectricity is applied to the sample.
It was confirmed that it would occur. The detailed value of this measurement circuit is
It is as follows. The sample is held in a vise, and insulation is provided between the sample and the vise.
With glass for sheeting (sheet thickness 6.8mm, size 40x
65 mm). Sample holding state by vice
Is 50 mm of the total length of 250 mm of the sample,
Clamp surface of vice with the remaining 200 mm free
It is in the state protruding from. Shield box specifications, vise shield box
Is the same as in Experiment A above. The value of the resistor is r₁= 1 Ω to 1 MΩ, r₂= 1MΩ,
is there. In the connection state of the measurement circuit to the sample as described above,
At the free end of the protruding side of the sample,
Approximately 1500 using a portable mini torch
℃ instantaneously given, as shown in FIG.
Oscilloscope voltage for about 0.7 sec from the moment
After the waveform violently oscillates within the range of ± 40 mV, the waveform becomes approximately 0.2 mV.
Attenuated monotonously during 4 sec. By the above experiment,
The ability of silicon steel sheets to generate electricity (pyroelectric) by heating
Quality was confirmed. For other general materials,
However, similar experiments have confirmed pyroelectricity.
Was. C. Confirm that piezoelectricity causes corrosion
Experiment Silicon steel plate (plate thickness 1.0 mm, length 120 x width 20 m
m) as a sample, and the sample was
Prepare two sets of the retained ones, and
Gives a slight curved plastic deformation, and continuously shakes the free end.
A motion was generated to generate piezoelectricity. As a result, piezoelectricity is generated
Corrosion occurred in the aged sample. D. Experiments to confirm that the method of the present invention prevents corrosion Two sets of samples holding the same samples as in Experiment C
Prepared, and for both samples, a very slight plastic deformation
Give shape and give continuous vibration to the free end.
Only, apply a 20mV, 100μA alternating current to both ends
Was. As a result, the sample without AC
Corroded in the same way as C, but the sample to which AC was applied corroded.
Did not. The piezoelectricity generated in general materials by the experiments of C and D
Causes corrosion, whereas the present invention
It was confirmed that the anticorrosion method was effective. Static external force without vibration and / or rotation
And / or metal members to be heated include bridges,
There are frame structures, workpieces, and the like. In the context of the present invention,
Examples of the class include the following.   General corrosion   Local corrosion (including pitting) In any of these cases,
Is involved in corrosion, and the relationship between these electrical phenomena and corrosion phenomena
Is always unity. In general, a corroded battery is formed on a corroded surface.
Corrosion voltage, current and corrosion circuit resistance
The relationship between the resistance and the current is I, and the anode potential E_A, Casor
Do potential E_C, The resistance R existing between the potential differences and the characteristic of the metal
I (R + r) = E between resistors r_A-E_CBecomes This
Corrosion proceeds under such electrical procedures,
Until now, the most corrosive environmental conditions
Water and air with high humidity (this is related to the amount of corrosion
The presence of oxygen is a prerequisite
Electrochemical reaction occurs at the interface between the environment and metal
A battery is formed. Generally, the above forms of corrosion
There are oxygen consumption type and hydrogen generation type.
If you think about the cross-section, inside the cross section of a certain metal
In areas where corrosion has not yet formed
When piezoelectricity or pyroelectricity is generated (although these are
Consider the uneven stress distribution due to uneven metal material
All of the piezoelectricity and pyroelectricity)
This electrical phenomenon is a gas that comes into contact with a metal at the critical surface of the metal
And a potential difference is generated. This still corrodes
Even if it is not in the state, the generated piezoelectricity,
Although the pyroelectric pole generation value is small in capacity,
Very high. This is the oscilloscope observation of Figure 1 (2)
Observed with a circuit as shown in the figure. From this, the piezoelectric
Contact where the gas or pyroelectricity is in contact with the critical surface of the source metal
Electrochemical reactions take place involving the ionization of body gases.
This is the trigger for corrosion. Synergy between this and the environment
The result is that the action promotes further corrosion. A little more
Considering the phenomenon of Fig. 1 (2) in Fig. 1 with a specific example
And, for example, a long metal body as shown in FIG.
When piezoelectricity and pyroelectricity are generated at an arbitrary point P,
Different sign relative to the piezoelectricity and pyroelectricity generated at the location
And a contact body that contacts the critical surface, for example, gas is ionized
And corrosion begins. That is, the infinity of the contact body
It doesn't ionize to the point and start corrosion. This time
The point of the cross section of the metal that keeps the state of advanced corrosion
Considering this, the figure is the same as FIG. 3 described above.
However, the corrosion of the relationship between the metal surface and the inner cross section described above with reference to FIG.
If the potential difference between points A and B is Ev, then Ev = E
_A-E_BOr Ev = E_B-E_AAnd reversible (what
Irrespective of how they are involved,
Another piezoelectricity, pyroelectricity, occurs in the mass.) FIG.
Non-uniform part of the cross section of the material in the cross-sectional relationship as shown in
When there is a cast hole near the stress potential point B including
In many cases, corrosion spots on the surface
The corrosion progresses toward
A stress limit occurs in the cross section of the material, causing a fracture accident.
Will be. Piezoelectricity is applied to rubber, plastic, painted steel plate, etc.
Qi, pyroelectricity occurs (If there is piezoelectricity, there must be pyroelectricity
Is recognized in terms of electrical properties).
The paint itself used as a finishing material also occurs inside the metal.
Piezoelectricity and pyroelectricity occur separately from piezoelectricity and pyroelectricity. This
If there are pinholes or cracks in the coating,
Will further promote corrosion. Also opposite
Corrosion occurs even if there is no damage on the painted surface
Think of things. These subtle piezoelectric, pyroelectric
The phenomenon eventually became a preparation for full-scale corrosion at a later date,
Work as a loose trigger and assistant. Original anti-rust paint
Said it would act as a corrosion enhancer, but this was never
There are aspects that cannot be said in general. It is the piezoelectric that occurs between the two
Qi and pyroelectricity are related to each other and electrically
If the stand works in a direction controlling over the work function of the metal
In the case of anticorrosion effect. Therefore, paint itself has
Opposing piezoelectricity and pyroelectricity occur separately and perform completely different functions.
Electrical work at the contact interface between metal and paint instead of
Must always be in the anticorrosion direction. Also the same
Thus, the effect of magnetizing the paint can be obtained. Please note that
Oxidation enhancement was not observed after a certain degree of oxidation
Where there is a history of oxidation,
Is a stable place at the moment,
However, a phenomenon in which oxidation is restarted is observed. This recurrence phenomenon is also
It is considered that electricity and pyroelectricity are involved. Oxidation history
There is an oxide film that is currently electrically stable
Piezoelectricity generated by changing mechanical and thermodynamic environmental conditions,
Pyroelectricity is electrically calculated based on the relationship between oxide film, piezoelectricity, and pyroelectricity.
As a result, it reaches the outer critical surface of the same coating, diffuses, and oxidizes.
Will be restarted. Piezoelectric and / or in the present invention
Does not require any special restrictions on the method of controlling pyroelectricity.
To cancel the applied piezoelectricity and pyroelectricity (for example,
External AC to control the air and / or pyroelectricity
A method of applying an electric field, a method of applying an alternating magnetic field,
Examples include applying a magnetic material paint or attaching a magnetic material)
Etc. are achieved. There are few circuits that act on AC electric fields.
At least one, depending on the number and location of electricity
Therefore, it may be appropriately increased or decreased. When the number of sources is unknown
Are set in advance at several locations. Using multiple application devices
External power supply must be equal pressure
If there is a potential difference, a potential difference appears at both ends of the external power supply.
You. Simultaneously apply AC external power and DC external power
Even so, each anticorrosion effect will be exhibited. this
In such a case, the external power supply
And the number of power distributions is
Since the application time is different and the application purpose is different,
The number of cloths may be different. The alternating current used has a frequency of 10
Hz to 6000 Hz, voltage 0.01V to 600V, preferably
Or at a frequency of 10 Hz to 600 Hz and a voltage of 0.01 V
Apply a current of 1V. One mode when applying AC from outside
Is implemented using an apparatus as shown in FIG. As shown in FIG.
The output of the AC power supply applied to the electrical circuit is small.
From the sample steel to
Observe the oscilloscope while hitting and applying heat to the body
At the beginning, piezoelectricity and pyroelectricity appear on the applied AC waveform
Although the air waveform can be observed, if the applied power
Electricity and pyroelectricity disappear, and only the applied AC waveform is observed later.
Result. Apply AC power output to steel
Naturally, it is necessary to change the relative
It is important to consider the AC power supply voltage and current
The relationship can be changed simultaneously or reversibly.
Need to be done. In addition, paints, especially rust preventive paints
Corrosion occurs due to piezoelectricity and pyroelectricity,
I will not fulfill my eyes. For such paints, magnetic coatings
It is preferable to apply a material or stick a magnetic substance. paint
Magnetic powder can be mixed into the
It may be increased or decreased according to the force. The present invention is not limited to the surface of a steel body but occurs at a deep portion.
Prevents corrosion by controlling pyroelectricity and piezoelectricity
it can. This method has many opportunities to generate piezoelectricity and pyroelectricity
Large plant, construction, civil engineering work, bridge, etc., vehicle body, navigation
Mechanical or thermodynamic effects such as airplanes, passing loads, steel frames, etc.
It is effective against corrosive materials. [0014] DESCRIPTION OF THE PREFERRED EMBODIMENTS Piezoelectric or pyroelectric
1 (1) is the same as that shown in FIG. 1 (2) and FIG.
(3) Equivalent on the electric circuit as shown in FIG. 1 or FIG. 1 (4).
Can be replaced by And observable piezoelectricity,
Pyroelectricity is biphasic and propagates through space. Like this
Therefore, not only oxides present in the environment, but also hydroxides,
Piezoelectric generated containing carbonate, nitrite, sulfite, etc.
When qi and pyroelectricity are in the positive region, O₂ ⁻etc
(−) Ion is adsorbed, and conversely, when it is in the negative region, H
₃O⁺Adsorbing (+) ions such as hydrogen and hydronium
become. As a natural corrosion mechanism, environmental conditions
Depending on the type of oxygen consumption or hydrogen release, etc.
Is widely accepted. So, as in this study, piezoelectricity,
The occurrence of pyroelectricity is immediate and can trigger corrosion.
And Therefore, controlling this piezoelectricity or pyroelectricity
This makes it possible to prevent corrosion.
Hereinafter, an example of the anticorrosion method of the present invention will be described. Embodiment 1 Circuit for controlling when there is one piezoelectric or pyroelectric source
Is shown in FIG. E₁Is the source, L₁Is a circuit, M is a metal plate
Is shown. Electricity generation source (E₁) Generated by the circuit (L
₁) By the current applied by the AC power supply
Controlled. Embodiment 2 FIG. 7 shows a control circuit in the case of two sources.
E₁, E₂Is the source, L₁, L₂Is a circuit, M is a metal plate
Show. Electricity generation source (E₁) And (E)₂) Generated electricity
Is the circuit (L₁) And (L₂)
Controlled by the current applied by the power supply. this
In this case, the applied voltages are equal. If the source is n, then n
All you have to do is build a circuit. Embodiment 3 FIG. 8 shows a control circuit in the case of three sources.
E₁, E₂, E₃Is the source, L₁Is a circuit, R is a resistor, M
Indicates a metal plate. Contact (A) to metal plate (M)₁),
(A₂), (A₃), And the corresponding contact (A ′)
₁), (A '₂), (A '₃Take). As shown in FIG.
Circuit (L₁Applied by the AC power supply
The current is generated at the source (E₁), (E₂), (E₃) Occurred in
Control electricity. When the source is n, on a metal plate (M)
A₁~ A_nA 'corresponding to that of the contact₁~ A '_nContact
A 'corresponding to that of the point₁~ A '_nContact
No. Embodiment 4 If the source is locally scattered, it is shown in FIG.
Such a circuit can be assembled and controlled. E₁, E₂Is
Source, L₁, L₂Indicates a circuit, R indicates a resistor, and M indicates a metal plate.
You. Embodiment 5 When applying a magnetic field to the source, FIG.
FIG. 10 and FIG.
Control your mind. Depending on the source, directly wind the coil (5)
A magnetic field in the source body by passing an alternating current
(See FIG. 10 (1)). Or a permanent magnet for the source
(6) is applied (see FIG. 10 (2)). Reference Example 1 The circuit shown in FIG. 5 was prepared, and the sample steel body was pressed or heated.
Use a oscilloscope to observe the generation of piezoelectricity or pyroelectricity
Examined. Table 1 shows the results. In the figure, M is a sample steel piece,
R is a resistor, OSC is an oscilloscope, and ○ in the table is
Indicates that piezoelectricity or pyroelectricity has occurred. In addition, pressurization
Hit with a medical diagnostic rubber hammer (continuous pressurization
Heating by hammer)
Performed by heating to 0-1500C. [0021] [Table 1] [0022] As described above, according to the present invention, vibration and / or
Or static external force (external stress) without rotation or / and
Heated large plants, aircraft, construction, civil engineering,
Corrosion of bridges, steel frames, etc. can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (1), (2), (3) and (4) are schematic diagrams of an experimental apparatus for confirming an electrical phenomenon which is a factor of corrosion. FIG. 2 is a schematic diagram showing a state when piezoelectricity or pyroelectricity is generated in a metal body. FIG. 3 is a schematic diagram showing a state when piezoelectricity or pyroelectricity is generated in a metal body. FIG. 4 is an electric circuit diagram for confirming generation of piezoelectricity or pyroelectricity by applying an alternating current to a steel body metal. FIG. 5 is a circuit diagram for examining a state where piezoelectricity or pyroelectricity is generated in a sample steel body. FIG. 6 is a control circuit diagram in the case where the number of sources of an electrical phenomenon that is a factor of corrosion is one. FIG. 7 is a control circuit diagram in a case where there are two sources of electric phenomena which are factors of corrosion. FIG. 8 is a control circuit diagram in a case where there are three sources of electrical phenomena which are factors of corrosion. FIG. 9 is a control circuit diagram in the case where the source of an electrical phenomenon which is a factor of corrosion is locally varied. FIG. 10 (1) is a circuit diagram in which an electric phenomenon which is a factor of corrosion is controlled by a magnetic field of an alternating current flowing through a coil,
(2) The figure is a circuit diagram for controlling an electrical phenomenon which is a factor of corrosion by a magnetic field by a permanent magnet. FIG. 11 is a diagram showing a waveform of piezoelectricity shown on an oscilloscope in an experiment for confirming generation of piezoelectricity. One vertical scale in the graph in FIG. 5 is 2.5 mV, and one horizontal scale is 5 msec. FIG. 12 is a diagram showing a pyroelectric waveform shown on an oscilloscope in an experiment for confirming the generation of pyroelectricity. In the graph, one vertical scale is 20 mV, and one horizontal scale is 0.2 sec. [Description of Signs] M: Sample metals E ₁ , E ₂ , E ₃ : Source R: Resistances L ₁ , L ₂ : Circuit

Claims (1)

(57) [Claims] For a metal member that receives a static external force (external stress) without vibration and / or rotation, by controlling the piezoelectricity generated in the metal member by receiving the external force, in corrosion a metallic component to prevent corrosion occurring in the metal member, the metal member
As a method of controlling generated piezoelectricity, the metal member
AC electric field (electric field), AC magnetic field (magnetic field) or
Applies a static magnetic field (magnetic field), or AC electric field (electric field) and DC
Metal characterized by simultaneous application of an electric field
Corrosion protection method for members . 2. For a metal member that is subjected to static heating without vibration and / or rotation, by controlling the pyroelectricity generated in the metal member by receiving the heating, the heating generates the metal member due to the heating. In a method of preventing corrosion of a metal member for preventing corrosion , pyroelectricity generated on the metal member
As a method of controlling the outside of the metal member
AC electric field (electric field), AC magnetic field (magnetic field) or static magnetic field (magnetic
Field) or an AC electric field (electric field) and a DC electric field (electric field)
Corrosion protection of metal members characterized by simultaneously applying
Law . 3. For a metal member subjected to static external force (external stress) and heating without vibration and / or rotation, by controlling the piezoelectricity and pyroelectricity generated in the metal member by receiving the external force and heating, Corrosion prevention method for a metal member for preventing corrosion generated in the metal member due to the external force
In the above, the piezoelectricity and pyroelectricity generated in the metal member are
As a control method, the metal member is externally exchanged.
Flow electric field (electric field), AC magnetic field (magnetic field) or static magnetic field (magnetic field)
Or an AC electric field (electric field) and a DC electric field (electric field)
A method for preventing corrosion of a metal member, wherein the method is applied simultaneously . 4. Metal members are silver, iron, steel, stainless steel, copper, brass,
The corrosion prevention of a metal member according to any one of claims 1 to 3 , wherein the metal member is one of nickel bronze, phosphor bronze, aluminum, duralumin, zinc, lead, and solder. Method.