JP2000308802A - Deoxidizing element, deoxidizing device and manufacture of deoxidizing element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a deoxidizing material and to provide a deoxidizing device having an excellent deoxidizing efficiency and a continuous function intended for ion-exchange water having low electrical conductivity. SOLUTION: The deoxidizing element is formed by providing a deoxidizing element 7 which comprises a metal B coated with a metal A having more ignoble redox potential than that of oxygen, having nobler redox potential than that of the metal A and electrically connected to a metal C having nobler redox potential than that of the metal B. The deoxidizing device is constituted of a vessel 1 having the deoxidizing elements 7 disposed therein and ion- exchange water is passed from an inlet 4 of the vessel 1 and the deoxidized water is taken out from an outlet 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a technical field in which cooling water is used, such as a cooler or an air conditioner for electric equipment. More specifically, an air conditioner such as a water-cooled heat pump, a fan coil unit, and an air handling unit,
It is intended for power converters such as thyristors and inverters, as well as ultrapure water production equipment for semiconductor production, etc. In order to prevent metal parts from being corroded by cooling water used for these, dissolved oxygen in water is used. The present invention relates to a deoxidizing material, a deoxidizing device, and a method for producing the same, which removes oxygen.

[0002]

2. Description of the Related Art Heretofore, there has been a deoxygenation apparatus utilizing an electrochemical reaction. For example, Japanese Patent Application Laid-Open No. H10-65841 discloses that, in a container having an inlet and an outlet through which water flows in and out, a surface of metal A whose oxidation-reduction potential is lower than oxygen, and a metal noble than this metal A A deoxygenating device is provided which includes a dissimilar metal pair in which the surface of B is opposed to and electrically connected thereto.

In this deoxidizer, as shown in FIG. 10, a metal A9 and a metal B10 are arranged so as to face each other, are electrically connected by a connection conductor 24, and a connection portion to be electrically connected is formed by a plastic frame 25. And a dissimilar metal pair covered with an insulator 26 so as not to come into contact with water.

[0004] The operation of this dissimilar metal pair will be described by taking as an example the case where aluminum is used as the metal A and iron is used as the metal B. In water, oxygen takes in electrons on the iron surface and reacts with water to generate hydroxyl ions, and at the same time, aluminum is ionized on the aluminum surface and emits electrons. As a result of this electrochemical reaction,
As represented by the following formulas (1), (2) and (3), aluminum hydroxide is generated and dissolved oxygen in water is removed. (Cathode reaction) 1 / 2O ₂ + H ₂ O + 2e ⁻ → 2OH ⁻ (1) (Anode reaction) Al → Al ³⁺ + 3e ⁻ (2) (Total reaction) 2Al + 3 / 2O ₂ + 3H ₂ O → 2Al (OH) ₃ (3) The above-mentioned cathode reaction proceeds smoothly due to the battery action by the contact between aluminum and iron.

[0005]

In the above-mentioned dissimilar metal pair, high-purity ion-exchanged water has a problem that the potential difference between aluminum and iron is small and the electric resistance of water is large, so that the deoxygenation rate is reduced. was there.

The present invention is directed to ion-exchanged water or the like having a large electric resistance and is made to solve the above-mentioned problems. The present invention promotes a deoxygenation reaction and can strongly remove oxygen. Oxygen-absorbing material that does not reduce the oxygen-reducing efficiency
An object of the present invention is to provide a deoxygenating apparatus and a method for manufacturing the same.

It is another object of the present invention to provide a deoxidizing material, a deoxidizing device, and a method for manufacturing the same, which are easy to handle and process materials, can be manufactured at low cost, and are easy to maintain.

According to the first aspect of the present invention, a dissimilar metal pair formed by a metal A having a redox potential lower than oxygen and a metal B which is nobler than the metal A and coats the metal A is provided with a metal A and a metal B. This is a deoxidizing element in which a noble metal C is electrically contacted.

According to a second aspect of the present invention, in the oxygen scavenging device of the first aspect, the metal A is Ni, Al, Zn, Sn,
Fe, Mg or one of these alloys, metal B
Is made of Ni, Al, Zn, Sn, Fe or one of these alloys.

According to a third aspect of the present invention, in the oxygen scavenging device of the first aspect, the metal C is Cu, Ag, Au, Pt,
C or one of these alloys.

According to a fourth aspect of the present invention, in the deoxidizing element according to the first aspect, a plurality of pores are formed and projections are provided.

According to a fifth aspect of the present invention, in the oxygen scavenging device of the first aspect, an aluminum-plated steel is used as a dissimilar metal pair, and a metal C made of copper plating or a copper mesh is electrically applied to the aluminum-plated steel. It is something that comes into contact.

According to a sixth aspect of the present invention, in the oxygen scavenging device of the first aspect, galvanized steel is used as a dissimilar metal pair, and the metal C made of copper plating or copper mesh is electrically applied to the galvanized steel. It is something that comes into contact.

According to a seventh aspect of the present invention, in the oxygen scavenging device of the first aspect, a tin-plated steel is used as a dissimilar metal pair, and the metal C made of copper plating or copper mesh is electrically applied to the tin-plated steel. It is what was brought into contact.

The invention according to claim 8 is a container having an inlet and an outlet through which water flows in and out, and the deoxidizing element according to any one of claims 1 to 7 is placed in the container. Device.

According to a ninth aspect of the present invention, in the deoxidizing apparatus according to the eighth aspect, an ion exchange resin is provided downstream of the deoxidizing element.

According to a tenth aspect of the present invention, the metal A having a redox potential lower than that of oxygen is converted into the metal B which is nobler than the metal A,
This is a method of manufacturing a deoxidizing element coated by a wet plating, vapor deposition, sputtering, thermal spraying or cladding method.

[0018]

An embodiment of the present invention will be described with reference to the drawings. When a metal whose oxidation-reduction potential is lower than oxygen, such as magnesium, is immersed in water containing dissolved oxygen,
Dissolution of magnesium and reduction of dissolved oxygen occur by the anodic and cathodic reactions of the following equations (4) and (5). Anode reaction: Mg → Mg ²⁺ + 2e ⁻ (4) Cathode reaction: O ₂ + 2H ₂ O + 4e ⁻ → 4OH ⁻ (5) Electrons generated by the anodic reaction are always consumed by the cathode reaction, resulting in excess or deficiency of electrons. Proceed while maintaining equilibrium. As a result, the change in the substance is expressed as a total reaction as shown in the following equation (6). Total _{reaction: 2Mg + O 2 + 2H 2} O → 2Mg 2+ + 4OH - → 2Mg (OH) 2 ... (6) Since the dissolved oxygen is consumed by such electrochemical reactions, as a result, corrosive water weakens. However, in this case, since the anodic reaction and the cathodic reaction occur in the same place, the overall reaction speed is not so large.

A metal whose oxidation-reduction potential is lower than oxygen;
For example, consider a case where magnesium is brought into contact with a noble metal, for example, iron, and immersed in water. in this case,
On the magnesium surface, only the anodic reaction occurs, the generated electrons move to iron, and only the cathodic reaction occurs on the iron surface. Then, the reaction rate becomes higher than in the case where magnesium is immersed alone.

FIG. 11 is a sectional view for explaining the relationship between the above electrochemical reaction and the conductivity of water. FIG. 11 (a) shows a deoxidizing element in which a plate of metal A9 whose oxidation-reduction potential is lower than oxygen and a plate of metal B10 which is nobler than metal A9 are brought into contact.

As shown in FIGS. 11B and 11C,
The metal A9 is dissolved (oxidized), a reduction reaction of oxygen occurs on the metal B, and precipitation hardly occurs in running water. However, as the dissolution of the metal A progresses, the pair of the metal A9 and the metal B10 is broken, and a precipitate is formed on the metal A9 as described above, and the deoxygenation efficiency decreases.

When the conductivity of water is as small as that of ion-exchanged water, the metal A9 and the metal B10 are in the immediate vicinity of contact with each other.
Reduction of dissolved oxygen occurs. Therefore, metal A9 and metal B1
The longer the length (in the direction perpendicular to the paper surface) where 0 is opposed to, the longer the deoxygenation efficiency is improved.

Further, when immersed in water having a higher conductivity than ion-exchanged water such as tap water, a current circuit is formed far away from the contact portion as shown in FIG. The amount of magnesium that can be utilized to remove lime is large. However, when the dissimilar metal pair is immersed in water having low conductivity such as ion-exchanged water, FIG.
As shown in (c), a current circuit is formed only near the contact portion,
The amount of magnesium that can be used is small. in this way,
The conductivity of water and the length of the metal A9 and metal B10 facing each other (in the direction perpendicular to the paper surface) affect the deoxidation efficiency.

The deoxidizing material according to the present invention intends to promote the deoxidation by continuously and stably using the spontaneous electrochemical reaction. This is coated with a thin base metal A to form a cut surface, to form a dissimilar metal pair close to the metal A, and further electrically connect a metal C nobler than the metal B to the cathode C near the anode. This is to increase the area.

FIG. 1 is a view showing one embodiment of a deoxidizer according to the present invention, wherein (a) is a cross-sectional view of the deoxidizer, and (b) is a plan view of the deoxidizer. In FIG. 1 (a), 1 is a container, 2 is a lid for closing the container 1,
Is a water inlet, 4 is a water outlet, 5 is a valve, 6 is a support rod, 7 is a deoxidizing element, 15 is a support tool, and a deoxidizing element 7 attached to the support rod 6 is housed in the container 1. Supporting tool 1
5 fixed. The deoxidizing element 7 is shown in FIG.
As shown in (b), a large number of fine holes 13 are formed, and mounting holes 14 for mounting to the support rod 15 are provided around the fine holes 13.

As shown in the enlarged sectional view of FIG. 2, the deoxidizing element 7 has a metal C11 in contact with a dissimilar metal pair consisting of a metal A9 and a metal B10, and the metal A has a lower oxidation-reduction potential than oxygen. Where metal B is more noble than metal A and metal C is more noble than metal B.

As is apparent from FIG. 2, metal A and metal B
By adding metal C to the combination of
Since the metal B, which is closer to the anode A, and the metal C, which has a larger potential difference, are closer to each other on the end face of the metal, the effective cathode area can be increased. The reaction can be continued.

The deoxidizing element 7 is provided with a large number of pores 13 and has a structure in which the number of end faces at which a cathodic reaction and an anodic reaction take place is large. And metal B and metal C adjacent to
Is considered to be a cathode.

For example, 1 μA /
1m where a current with a current density of cm ² is flowing
At a distance of m, a voltage drop of 0.1 V occurs. The electrode potentials of the various metals are as shown in Table 1. The potential difference between the dissimilar metal pairs is on the order of 0.1 V. The range of the cathode through which the current flows at 1 μA / cm ² or more is metal B at a distance of 1 mm or less from metal A. Alternatively, it is considered to be the surface of metal C. In water having a specific resistance of 10 MΩcm, this distance is considered to be 0.1 mm or less. Therefore, it is effective to select a noble metal as the metal C.

[0030]

[Table 1]

The metal A of the deoxidizing element 7 is composed of Mg, Zn, Al, Fe, Sn, Cu, N having a redox potential lower than that of oxygen.
If i or its alloy is used, it can be deoxidized,
Also, it is relatively inexpensive and easily available.

By using Zn, Al, Fe, Sn, Cu, Ni or an alloy thereof which is nobler than the metal A used for the metal B of the deoxidizing element 7, the ionization reaction of the metal A is promoted.

By using Ag, Au, C, Cu, Pt or an alloy thereof which is more noble than the metal B to be used, the ionization reaction of the metal A is promoted. A may be passivated and metal B may be ionized, further promoting the deoxygenation reaction.

By providing a large number of pores in the deoxidizing element 7, it is possible to increase the area where the deoxidizing reaction occurs at the end face adjacent to the dissimilar metal, thereby promoting deoxidation.

Further, as shown in FIG. 1, by stacking a large number of different metal pairs at predetermined intervals, the area of the oxidation-reduction reaction can be increased and the deoxidation efficiency can be improved.

In addition, by forming projections having a predetermined height on a plate-like dissimilar metal pair, the protrusions can be easily laminated at a constant interval, so that the assembling of the deoxidizer is simplified and the dissimilar metal pair surface Water can be made to flow uniformly, and the contact between the dissimilar metal pair and the dissolved oxygen is promoted, so that the deoxygenation reaction easily occurs.
As a specific example of the deoxidizing element 7 in this case, an Al-plated steel obtained by plating a metal B made of steel with a metal A made of Al is used, and a metal C made of copper plating is further electrically applied to the Al-plated steel. When brought into contact, Al is passivated in low-temperature ion-exchanged water, which can promote ionization of iron. As the Al-plated steel, a steel used for a structure or the like can be used, and it is an easily available general-purpose steel.

As shown in FIG. 6, when an ion exchange cylinder 19 containing an ion exchange resin is provided on the downstream side of the deoxidizer, the generated divalent iron ions are transferred to the ion exchange resin. After being captured, it is further oxidized to trivalent and becomes insoluble in water, so that high-resistance and deoxygenated water can be obtained. In this case, by providing a filter 20 for removing trivalent Fe at the outlet 3, water from which suspended matter such as iron oxide (Fe ₂ O ₃ ) has been removed can be obtained. As a specific example of the deoxidizing element 7, a galvanized steel obtained by plating a metal A made of zinc on a metal B made of steel, and further applying copper plating to the galvanized steel to promote ionization of zinc. Can be. As the galvanized steel, those used for structures and the like can be used, and it is an easily available general-purpose steel. In particular, a galvanized steel sheet has a large amount of strongly acidic ions such as chloride ions or sulfate ions, and has a large corrosion promoting effect of copper against corrosive water, so that excellent deoxidation characteristics can be obtained.

As another specific example of the deoxidizing element 7, an Sn-plated steel obtained by plating a metal A made of steel with a metal B made of Sn is used, and the Sn-plated steel is further plated with copper. Noble copper promotes ionization of Fe. As this Sn-plated steel, a steel used for a structure or the like can be used, and it is an easily available general-purpose steel. In particular, since the Sn-plated steel sheet serves as a conductor for electrically contacting Cu and Fe, which is more noble, the consumption of Fe becomes uniform, and efficient deoxidation can be performed.

As shown in FIG. 1, the above-described oxygen-absorbing element composed of a dissimilar metal pair is placed in a container 1 having water inlets and outlets 3 and 4. A device is obtained.

A large amount of oxygen scavenging element capable of efficient oxygen scavenging by using wet plating, hot dipping, vapor deposition, sputtering, thermal spraying, and cladding to electrically contact metals A, B, and C. Material can be manufactured at low cost.

[0041]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; First, a description will be given of a method of an experiment performed for evaluating the oxygen removing effect of a dissimilar metal pair. FIG.
In the deoxidizer used in the embodiment of the present invention, reference numeral 1 denotes a container, 2
Is a lid with a flange, 5 is a valve, 6 is a support rod, and 7 is a deoxidizing element, which is supported by the support rod 6. A dissolved oxygen detecting element 8 is connected to a dissolved oxygen meter (not shown). Reference numeral 16 denotes test water, and 17 denotes a stirrer for stirring the child suspension 16. The container 1 was a glass container having an inner volume of 1 liter. As shown in FIG. 4, the deoxidizing device 7 used was a plate in which three kinds of metals were laminated and perforated. The number of deoxidizing elements 7 used in the test was 10, and the size was 4 c in length.
A hole having a diameter of 3.2 mm was formed in a plate having a size of m, a width of 3 cm and a thickness of 0.5 mm. The number of holes per 71 deoxidizing elements was 40.

10 g of ion-exchange resin was dispersed in the container 1 and filled with ion-exchanged water having an electric conductivity of 1 μS / cm or less and kept at 10 ° C. This ion-exchanged water was used as test water 16. The change in the dissolved oxygen concentration of the ion-exchanged water in the vessel was tracked by a dissolved oxygen meter (not shown) connected to the dissolved oxygen detecting element 8 at an atmosphere temperature of 10 ° C. During the dissolved oxygen measurement, the test water 16 was stirred by the stirrer 17.

Embodiment 1 Using a hot-dip aluminum-plated steel sheet as the deoxidizing element 7 shown in FIG. 4 and further using a Cu-plated steel sheet, the result of an experiment is shown in FIG. Comparative Example 1 shows the results for a hot-dip aluminized steel sheet that has not been Cu-plated.

As shown in FIG. 5, according to the deoxidizing element of this embodiment, the dissolved oxygen concentration becomes 0 after about 6 hours.
Comparative Example 1 showed a value of about 20 ppm.
The value of 6 ppm was shown even after the passage of time.

Embodiment 2-4. Deoxidizing element 7 shown in FIG.
As shown in Table 2, characteristics were measured using two kinds of metals (metal A and metal C) pressed against a steel plate (metal B). The results are shown in Table 2 together with Comparative Examples.

[0046]

[Table 2]

As is clear from Table 2, with respect to each of the deoxidizing elements made of metals A and B of Comparative Examples 2 and 3, metal C was further contacted with metals A and B as in Examples 2 and 3. In the case of a deoxygenating element, the time during which the initial dissolved oxygen concentration of 10.9 ppm drops to 1 ppm is greatly reduced.

Embodiment 5-7. Deoxidizing element 7 shown in FIG.
As shown in Table 3, characteristics were measured using two kinds of metals (metal A and metal C) pressed against a tin plate (metal B). The results are shown in Table 3 together with Comparative Examples.

[0049]

[Table 3]

As is apparent from Table 3, the deoxidizing elements made of metals A and B in Comparative Examples 5 to 7 were further contacted with metals C as in Examples 5 to 7 as in Examples 5 to 7. In the case of a deoxygenating element, the time during which the initial dissolved oxygen concentration of 10.9 ppm drops to 1 ppm is greatly reduced.

Embodiment 8-13. As shown in Table 4, an aluminum-plated steel plate (metal A
And a metal B) electrically connected to a metal nobler than Fe as the metal C, and the characteristics were measured. The results are shown in Table 4 together with Comparative Examples.

[0052]

[Table 4]

As is clear from Table 4, the deoxidizing device comprising the metals A and B of Comparative Example 4 was subjected to the deoxidizing process in which the metals A and B were further contacted with the metal C as in Examples 8 to 13. In the case of a device, the initial dissolved oxygen concentration is 10.9p
The time for pm to drop to 1 ppm is greatly reduced.

Embodiment 14-16. As shown in Table 5, the oxygen-absorbing element 7 shown in FIG. 4 was prepared by pressing a copper mesh as a metal C on an aluminum-plated steel sheet, a galvanized steel sheet, and a tin-plated steel sheet and electrically connecting them. Measurement. The results are shown in Table 5 together with Comparative Examples.

[0055]

[Table 5]

As is clear from Table 5, the oxygen-absorbing elements made of the aluminum-plated steel sheets, galvanized steel sheets and tin-plated steel sheets (metals A and B) of Comparative Examples 5 to 7 were:
In the case of a deoxidizing element in which a Cu mesh (metal C) is further contacted as in Examples 14 to 16, the time during which the initial dissolved oxygen concentration of 10.9 ppm drops to 1 ppm is greatly reduced.

Embodiments 17-19. Container 1 shown in FIG.
Then, a deoxidizing element made of galvanized steel or copper-plated galvanized steel is laminated, ion-exchanged water is passed through, the dissolved oxygen concentration of water is measured at the inlet and outlet, and the oxygen is removed at room temperature (20 ° C.). The oxygen characteristics were examined. As shown in FIG.
Was circular, 12 cm in diameter and 0.5 mm in thickness. The height of the projection 21 of the deoxidizing element 7 is 0.5 m
m, 1 mm and 2 mm. The number of deoxidizing elements 7 was as shown in Table 6. Table 6 shows the deoxidation characteristics together with comparative examples.

[0058]

[Table 6]

As is clear from Table 6, Examples 17 to 19 in which the deoxidizing element is made of copper-plated galvanized steel.
In each case, the outlet dissolved oxygen concentration was lower than in Comparative Examples 8 to 10 in which the deoxidizing element was made of galvanized steel not subjected to copper plating.

Embodiment 20 FIG. As shown in FIG. 6, the deoxidizing element 7 is placed upstream of the deoxidizing device, and the ion exchange resin 19 is placed downstream of the deoxidizing element 7 to flow water.
The water filtered out at 0 and flowing out of the outlet 3 is circulated to the deoxidizer by a pump, and the dissolved oxygen concentration of the water is measured at the entrance and the outlet of the deoxygenator, and the deoxygenation characteristics are examined at room temperature (20 ° C.). Was.

FIG. 5 is a diagram showing the deoxidation characteristics of this embodiment. As is clear from the figure, the dissolved oxygen concentration can be made close to 0 ppm after 40 to 60 hours with respect to high-purity water such as ion-exchanged water.

Note that, as shown in FIG.
The same result can be obtained even if the ion exchange resin tube 19 is provided on the outside on the downstream side of. In FIG. 8, the water in the water storage tank 22 is circulated by the pump 23 and stored in the water storage tank, the dissolved oxygen concentration in the water storage tank is measured by the dissolved oxygen detection element 8, and the deoxygenated water is appropriately used. Can be.

[0063]

According to the first, second and third aspects of the present invention, the dissimilar metal pair formed by the metal B coated with the metal A is brought into electrical contact with the metal C which is more noble than both. As a result, the deoxygenation performance with respect to ion-exchanged water having a high specific resistance at a low temperature is improved.

According to the fourth aspect of the present invention, since holes are formed in the plate-shaped deoxidizing element and the projections are provided, the work of laminating at a certain interval becomes easy, and the passage of the water flow can be secured. By promoting the contact of the deoxidizing element,
Deoxygenation efficiency is improved.

According to the fifth, sixth and seventh aspects of the present invention, the material is a general material, is easily available, and facilitates the production of a heterogeneous metal pair. In addition, the structure of the deoxidizer is simplified. Can be.

According to the eighth and ninth aspects of the present invention, a deoxygenating apparatus capable of deoxidizing ion-exchanged water at a low temperature and high resistance can be obtained by using a deoxidizing element having excellent deoxidizing performance. .

According to the tenth aspect of the present invention,
By methods such as vapor deposition, sputtering, thermal spraying and cladding,
It is possible to manufacture a deoxidizing element, and by these methods, a large amount of the deoxidizing element can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view and a plan view showing a deoxidizer and an oxygen scavenger according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a deoxidizing element according to an embodiment of the present invention.

FIG. 3 is a sectional view showing an apparatus for measuring characteristics of a deoxidizing element of the present invention.

FIG. 4 is a plan view showing a deoxidizing element according to another embodiment of the present invention.

FIG. 5 is a diagram showing the deoxidizing characteristics of the deoxidizing element of the present invention.

FIG. 6 is a cross-sectional view showing a deoxidizer according to another embodiment of the present invention.

FIG. 7 is a plan view and a side view showing a deoxidizing element according to another embodiment of the present invention.

FIG. 8 is a configuration diagram showing a use form of the deoxidizer in the present invention.

FIG. 9 is a diagram showing the deoxidation characteristics of the deoxidizer according to the present invention.

FIG. 10 is a cross-sectional view showing a conventional oxygen scavenger.

FIG. 11 is a cross-sectional view for explaining a mechanism of deoxygenation.

[Explanation of symbols]

1 container, 2 lids, 3 inlets, 4 outlets, 5 valves,
6 support rod, 7 deoxygenation element, 8 dissolved oxygen detection element,
9 Metal A, 10 Metal B, 11 Metal B, 12 holes, 1
3 pores, 14 mounting holes, 15 supports, 16 test water, 17 stirrer, 18 deoxygenator, 19 ion exchange resin, 20 filter, 21 protrusion, 22 water tank,
23 pump

Continued on the front page. (72) Inventor Seiichi Mitsumoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Miya Kazuhiro Miya 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Inside Electric Co., Ltd. (72) Inventor Hisakatsu Kawai 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Kazuhiro Executive 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. Inside the company (72) Inventor Ryoshu Seki 3-5-8, Higashitada, Kawanishi-shi, Hyogo Tada Electric Co., Ltd. F term in the company (reference) 4D011 AA20 4D037 AA08 AB11 BA23 4D038 AA05 AB27 BB03 4D061 DA05 DB18 EA01 GA08

Claims (10)

[Claims] 1. A metal A having a redox potential lower than oxygen,
A deoxygenating device, wherein a metal C which is more noble than the metal A and the metal B is electrically contacted with a dissimilar metal pair formed of the metal B which is nobler than the metal A and which is coated with the metal A. 2. The method according to claim 1, wherein the metal A is Ni, Al, Zn, Sn, F
2. The deoxidizing device according to claim 1, wherein the metal B is made of e, Mg or one of these alloys, and the metal B is made of Ni, Al, Zn, Sn, Fe or one of these alloys. 3. The deoxidizing element according to claim 1, wherein the metal C is made of Cu, Ag, Au, Pt, C or one of alloys thereof. 4. The oxygen scavenging device according to claim 1, wherein a plurality of pores are formed and projections are provided. 5. The deoxidation apparatus according to claim 1, wherein an aluminum-plated steel is used as the dissimilar metal pair, and a metal C made of copper plating or a copper mesh is brought into electrical contact with the aluminum-plated steel. element. 6. The deoxygenation method according to claim 1, wherein galvanized steel is used as the dissimilar metal pair, and the metal C made of copper plating or copper mesh is brought into electrical contact with the galvanized steel. element. 7. Tin-plated steel is used as a dissimilar metal pair,
2. A deoxidizing element according to claim 1, wherein said tin-plated steel is electrically contacted with metal C made of copper plating or copper mesh. 8. A deoxygenating apparatus comprising a container having an inlet and an outlet through which water flows in and out, and wherein the deoxidizing element according to claim 1 is placed in the container. 9. The oxygen scavenger according to claim 8, further comprising an ion exchange resin and a filter downstream of the oxygen scavenger. 10. A metal A having a redox potential lower than that of oxygen.
To the metal B, which is more noble than the metal A, by wet plating, vapor deposition,
A method for producing a deoxidizing element, which comprises coating by a method of sputtering, thermal spraying or cladding.