JPS60155688A - Processing method for rapidly aging surface of copper or copper alloy and copper or copper alloy product having rapidly aged surface - Google Patents

Abstract

PURPOSE:To make Cu or a Cu alloy harmless to the human body by oxidizing the surface of a Cu or Cu alloy member contacting with water by annealing, heating followed by rapid cooling and exposure to air, pickling, or exposure to an ozone atmosphere. CONSTITUTION:A molded article of Cu or a Cu alloy is annealed, it is exposed to an ozone atmosphere for a fixed time to cause rapid oxidation, it is pickled, neutralized, and washed, or it is heated at a low temp., rapidly cooled, exposed to air, and slowly cooled. By said operation, the surface of the molded article contacting with water is rapidly aged by oxidation, so water contacting with the article is not made harmful. This method is applied to industrial produces of Cu or a Cu alloy such as a molding, a porous molding, a wire, a fine granule, an aggregate of fine granules, a pipe, a plate and foil, water vessels such as a kettle, a pot and a bottle, and goods for water supply such as a water tap, a trap, and a connecting pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing method for copper or a copper alloy that uses copper ions so as not to cause harm to the human body, and to products obtained thereby.

Traditionally, evaluations of copper ions have been mixed; for example, with regard to copper ions contained in water, there are theories that the human body needs some amount of copper ions, and theories that say it is better not to contain them. However, there does not seem to be anything that has clarified the basis for what conditions are best.

This invention takes the above-mentioned point as a starting point, takes a somewhat necessary position, and based on the assumption that water put into a copper vessel becomes harmful under certain conditions, and becomes harmless under certain conditions. After examining the necessary conditions, he concluded that water placed in old copper vessels is harmless, but water becomes harmful when it comes into contact with new vessels or new cuts. And apart from being non-industrial, it is harmless when exposed to air or water for long periods of time, and even then, new cuts can also
The results showed that it could be harmful for a considerable period of time.

Therefore, as a result of researching alternative detoxification methods, the applicant found that materials such as copper or copper alloy molded products, porous molded products, linear products, fine grains cut from them, and aggregates of fine grains, etc.
and industrial products such as pipes, plates, and foils for the interior of water tanks; water containers such as kettles, pots, and bottles; water supplies such as faucets, traps, and connecting pipes; For materials to be added to the interior of tanks, containers, and industrial products made of other materials: (1) Exposure to an ozone atmosphere for a certain period of time to rapidly oxidize the surface. In particular, it is more effective to expose the product or material to an ozone atmosphere after heating.

(2) After pickling, neutralize, wash with water, and dry to rapidly oxidize the surface.

(3) After heating at medium temperature (to the extent that it emits dark red light),
Annealing is performed by slow cooling.

(4) After heating at a low temperature (below about 300°C), ■ rapidly cooling it, and slowly cooling it by exposing it to air midway through.

This oxidized the surface in contact with water. This causes the surface to age rapidly.

The effect of doing so, especially the effect over time, can be inferred from the test results below.

1) For another purpose, a plastic structure was attached to the spout of a universal water faucet, and after using water normally for more than three years, the bacteria that formed on the plastic structure was removed. When we conducted a test to kill the group, we found that the chlorine contained in tap water had little effect, and chlorine bleach did
I was finally able to kill it. Around this time, when the above-mentioned plastic structure was immersed in a container where copper ions were applied, it was not immediately killed, but the growth was suppressed and ``all of a sudden it disappeared.''
I found out what I can do in this situation.

2) In water deodorizing equipment that uses activated carbon, there are many cases of bacteria growing on the activated carbon, so on September 1, 1982,
On the 5th, prepare two containers, one containing activated carbon and half a volume of tap water, and the second containing activated carbon, a small amount of copper alloy chips, and half a volume of tap water. After continuing to move the water up and down twice a day and then leaving it to stand still, 10 times in the same year.
When I asked a public laboratory to check the number of general bacteria on the 3rd of the month, it was 50 bacteria in 1ml with activated carbon and alloy, and 24,000 with activated carbon alone.

3) Put refiltered tap water from a public laboratory into two containers, put activated charcoal in container 1, put activated charcoal and copper alloy chips in container 2, and transplant E. coli into both. According to the report dated October 22, 1981, both cases were negative for E. coli, and the number of general bacteria was 500 per ml per container. There were 24 pieces per ml per ml.

In addition, when comparing the processing methods (1) to (4) above, the most common method is to heat the material so that it does not become red-hot, then rapidly cool it, and then expose it to air midway through, which prevents impurities from adhering to the surface. It was found that there was no failure, and there was no partial rust. The chips used in the above tests 1) to 3) were chips of alloy wire heated with a burner, dipped briefly in water, and then left in the atmosphere.

The processing methods (1) to (4) described above are as follows (
It can be used in cases A) to (C).

(A) In order to increase the surface area, a molded product (1) with a large number of warts is made, as shown in Figure 1 when sliced, or a linear shape as shown in Figure 2 in cross section. A combination of objects (2) to (2) is made, or a sponge-like porous molded object (3) is made, or a third
As shown in the figure, a bag or basket (4) containing fine grains of the above material is made, or many of the fine grains (5) are used as they are, processed by the method described above, and sometimes , added to industrial products made from other materials,
Ultimately, it works to prevent bacterial growth.

Among these additional materials, the combination of molded product (1) and linear products (2) to (2) is sand and gravel for filtration, gravel in settling basins, and sand and mud in ponds and fishponds. It is used to prevent the overgrowth of blue powder and the growth of general bacteria.It is also used as a molded product (1) as part of the case for containing activated carbon, or as a part of the case for containing activated carbon. (5) is used in combination with activated carbon to deodorize water. Also, molded products (
1) When making 1), it is used as a tack type and fixed so that the tack head is inside the side wall of water supplies and equipment such as water tanks and pipes.

In addition, the fine particles (5) to (5) placed in a bag or basket (4), or the molded product (1) in a suitable shape, can be placed in a container of clean water, such as a conventionally known pot or bottle. It is used as a storage device for water in preparation for
They are also equipped with substances that can add minerals and activated carbon for deodorization.

In addition, molded products (1
), tubular objects, plate-like objects, foil-like objects, and bags and baskets (4)
Place or fix the fine particles (5) in a location where it comes into contact with the built-in water or residual water of a water tank such as a rooftop tank, underground tank, air conditioning radiator tank, solar water heater water tank, etc. used as

In addition, molded products (1
), combinations of linear objects (2) to (2), and fine particles (5), etc. are used in parts of water faucets and water supply pipes, built-in water such as traps and well equipment, or positions that contact residual water. used in preparation for

In addition, for tube-like objects, plate-like objects, foil-like objects, molded objects, etc. installed inside the water tank, many unevennesses are added to the surface to increase the surface that comes in contact with water, or the surface is bent out or punched out. It is pre-processed to make it easy to install.

(B) Water containers such as kettles, pots, water bottles, and bottle-like objects in the same shape as before are made of copper or copper alloy, and
Processed using methods 1) to (4), the inner surface of the container itself prevents the growth of general bacteria, and at this time, the container is provided with activated carbon or activated carbon in a case, or mineral additives are added to the container. Sometimes it is prepared.

(C) Water taps, traps, connecting pipes, and other water supplies in the same shape as before are made of copper or copper alloy, and
Processed using method (4), the inner surface of the product prevents the growth of general bacteria, and as an application of this method, many irregularities are formed on the inner surface of the faucet, trap, and connecting pipe when casting. It is said that the inner surface is prevented from growing by aging the inner surface by applying it and processing it according to methods (1) to (4).

The effects of (A) to (C) above can be inferred from the test results of 1) to 3) above, but there are other test examples for water faucets, including normal ones, fine particles (5
), the same product before plating, and the same product with different heat processing were conducted, and it was found that the product with fine grains added and the product that was heat processed before plating had the same level of performance. The effect of

According to another test example, 1 ml of residual water per general bacterial count
Medium and normal adjustable faucets have 11 pieces, and 0 with fine particles (5).
(However, due to the cold weather, both values are below the regulation value, so they are not officially quoted).

[Brief explanation of drawings]

Figure 1 is a sliced sectional view, Figure 2 is a sectional view, Figures 3 and 4 are front views, and Figure 5 is a side view to which an example similar to Figure 1 is attached. FIG. 6 is a sectional view, and FIG. 6 is a front view. (1) Molded product, (2) Linear product, (3) Porous molded product, (4) Bag or basket, (5) Fine particles, Patent applicant: Yasuo Sato

Claims (1)

[Scope of Claims] (1) Industrial products such as copper or copper alloy molded products, porous molded products, linear products, aggregates of fine particles, fine grains, tubular products, plate-like products, foil-like products, and kettles. (1) Apply an annealing operation to water containers such as pots and bottles, water supplies such as faucets, traps, and connecting pipes, and additional materials. (2) After heating, cool rapidly and expose to air midway through. (3) After pickling, neutralize and wash with water. (4) Expose to ozone atmosphere for a certain period of time. (2) Processing method for rapidly aging the surface of copper or copper alloy, characterized by oxidizing the water-contacted surface by oxidizing the surface in contact with water. Copper or copper alloy products whose surfaces have been rapidly aged by the method described in 1) (1) Molded products, porous molded products, fine grains or aggregates of fine grains,
Additional materials to prevent bacterial growth, such as linear objects (2) Tubular objects, plate-like objects with many uneven surfaces,
Additional materials provided or attached to the inside of tanks for foil-like objects, molded objects, etc. to prevent the growth of bacteria (3) Water containers such as kettles, pots, water bottles, and bottle-like objects (4) Inside The water container (5) according to item (3) above, which is equipped with activated carbon or activated carbon in a case.The water container (6) according to item (3) above, which is capable of adding mineral additives inside. ) Water taps with many uneven surfaces on the inside of the structure to increase the water contact area (7) Water supply faucets such as traps and connecting pipes with many uneven surfaces on the inside of the structure to increase the water contact area (7) 8) Water supply equipment such as conventional water taps, traps, and connecting pipes (9) The above-mentioned ( Additional material (10) described in item 1) Provided in a position where it comes into contact with built-in water or residual water of a water tank, such as a conventionally known rooftop tank, underground tank, air conditioning radiator tank, solar water heater water tank, etc. (11) The additional material (12) as described in (1) above, which is arranged in a conventionally known clean water container.
The iron head can be fixed inside the side wall of water supplies such as water tanks and pipes.Additional material (13) described in item (1) above.A net-like container for activated carbon in a case or for activated carbon. Additional material (14) described in the above item (1) to be combined with the above item (1), such as sand and gravel for filtration, sedimentation tank sand and gravel, sand and mud for ponds and fishponds, etc. Additional materials listed