Identification method of low carbon discharge aluminum product

Abstract

To provide a method for easily determining whether or not a product is a low carbon discharge aluminum product.SOLUTION: An identification method of a low carbon discharge aluminum product comprises: a first step for preparing a low carbon discharge aluminum bullion; a second step for preparing a low carbon discharge aluminum product which is produced using the bullion; a third step for chemically analyzing an inclusion elemental composition in the product prepared in the second step for preparing analysis data; a fourth step for preparing reference analysis data of chemical analysis of an inclusion elemental composition in a reference aluminum product, and comparing the reference analysis data with the analysis data acquired in the third step for acquiring comparison data of the inclusion elemental compositions of the reference aluminum product and the low carbon discharge aluminum product; and a fifth step for extracting a difference of a content of a specific element in both products on the basis of the comparison data, and determining or identifying whether or not the difference is equal to or more than a prescribed amount. The analysis of the inclusion elemental composition is a scientifically reliable and simplified method for identifying the low carbon discharge aluminum product.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for identifying aluminum products (low-carbon emission aluminum products) manufactured using electricity with low carbon dioxide emissions, such as renewable energy, a method for determining their authenticity, and aluminum products identified by this identification method. [Background technology]

[0002] In order to realize a decarbonized, sustainable society, there is a need to drastically reduce the environmental impact of aluminum production. Generally, aluminum ingots produced using electricity generated from fossil fuels emit a large amount of carbon dioxide during the production process, at 13.9 ton-CO2 / ton-AL (i.e., 13.9 tonnes of carbon dioxide are emitted when producing 1 tonne of aluminum ingot), and these large emissions are considered an issue.

[0003] To address this issue, a conventional aluminum recovery method is described in Patent Document 1, in which used aluminum products distributed in the market are recovered and regenerated as aluminum ingot, and this recycled aluminum ingot is used to recycle aluminum.

[0004] However, before it is recycled, the aluminum itself is originally made by dissolving bauxite ore in caustic soda solution to produce sodium aluminate solution, from which the alumina is extracted, and then the alumina is electrolyzed in molten cryolite to produce aluminum bullion (also known as primary bullion), and the production process of this primary bullion consumes a large amount of electricity.

[0005] As an effort to further reduce the environmental burden, there has been a recent increase in the procurement of aluminum ingots produced using electricity obtained from renewable energy sources, which are energy sources that are always present in nature, such as solar, hydroelectric, wind and geothermal energy, commonly known as low-carbon emission aluminum. The use of aluminum ingots whose carbon dioxide emissions during production are kept to 4.0 ton-CO2 / ton-AL or less (i.e., the amount of carbon dioxide emitted during the production of 1 ton of aluminum ingot is 4.0 tons or less) is known as an effective measure to reduce the environmental impact in the manufacture of aluminum products. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 06-116773 [Patent Document 2] JP 2017-15503 A [Patent Document 3] JP 2023-33777 A Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, among synthetic resins, resins produced from plant-derived raw materials (so-called biomass resins) are known as resins that do not increase carbon dioxide emissions, as opposed to resins produced from petroleum-derived raw materials. Even if petroleum-derived resins and biomass resins have the same chemical structure and basic physical properties, it is possible to determine whether a resin is petroleum-derived or biomass resin by measuring the ratio of carbon isotopes (radioactive carbon-14) contained in each resin. In addition, even in the case of a mixture of petroleum-derived resin and biomass resin, the percentage of biomass resin contained can be measured by measuring the carbon isotope ratio. This percentage is also called the biomass ratio.

[0008] In contrast, when it comes to aluminum, there is no difference in elemental isotopes between aluminum ingots produced using fossil fuels as an energy source and aluminum ingots produced using renewable energy as an energy source, as there is with biomass resin; the only difference is the source of electricity used. Therefore, there was a problem in that it was impossible to determine whether or not an aluminum product, such as aluminum foil, which is finally obtained after the aluminum ingot itself or the subsequent processing steps such as rolling, is a low-carbon aluminum product in which carbon dioxide emissions were reduced during production.

[0009] Specifically, in the production of aluminum, the only difference is the source of electricity used, so a method for testing the level of biomass plastic content by adding an identification additive to a resin material, as described in Patent Document 2, for example, cannot be applied. Similarly, for example, the method of identification and traceability using marking on biomass plastics, as described in Patent Document 3, would be difficult to put into practical use for aluminum products used for high-temperature heating applications, and would be costly. As such, it is difficult to apply the same methods for identifying biomass plastics to aluminum, and there is a need for a method to easily identify whether or not an aluminum product is a low-carbon emission product.

[0010] Therefore, an object of the present invention is to provide a method for easily determining whether or not an aluminum product is a low-carbon emission product. [Means for solving the problem]

[0011] As a result of extensive research, the inventors have discovered that when manufacturing low-carbon emission aluminum products, by slightly varying the composition from aluminum (standard aluminum) made from aluminum ingots produced using conventional fossil fuels as an energy source, and comparing the composition of the product made of standard aluminum (standard aluminum product) and the composition of the product made of low-carbon emission aluminum (low-carbon emission aluminum product) with composition analysis data obtained by conventionally known chemical analysis methods for composition, it is possible to easily identify whether the aluminum product is one of these.

[0012] In addition, as a result of extensive research, the inventors have also discovered that by setting the compositional difference of the low-carbon emission aluminum product obtained in this manner to a specified range relative to a standard aluminum product, it is possible to keep changes in the physical properties and characteristics of the low-carbon emission aluminum product to a minimum, or to keep them to a minimum.

[0013] Specifically, the first invention is a method for identifying low-carbon emission aluminum products comprising at least a first step of preparing low-carbon emission aluminum ingot manufactured using electricity with low carbon dioxide emissions; a second step of preparing a low-carbon emission aluminum product manufactured using the aluminum ingot; a third step of chemically analyzing the elemental composition in the low-carbon emission aluminum product prepared in the second step to prepare analytical data (including the analytical results); a fourth step of preparing standard analytical data (including the analytical results) of the chemical analysis of the elemental composition in a standard aluminum product used as a standard, and comparing the standard analytical data with the analytical data obtained in the third step to obtain comparative data of the elemental composition between the standard aluminum product and the low-carbon emission aluminum product; and a fifth step of extracting from the comparative data the difference in the content of a specific element in the standard aluminum product and the low-carbon emission aluminum product, and identifying or determining whether the difference is equal to or greater than a predetermined amount.

[0014] By using this type of identification method, it is possible to identify whether or not an aluminum product is a low-carbon emission product by analyzing the composition of contained elements, which is a scientifically reliable and simple method.

[0015] Also, in the second invention, in the configuration of the first invention, the low-carbon emission aluminum product to be identified is a product made of aluminum foil or a product containing aluminum foil.

[0016] By adopting such an identification method for products made of aluminum foil or products containing aluminum foil used for various purposes, it becomes possible to identify whether or not the product is a low-carbon emission aluminum product by analyzing the elemental composition, which is a scientifically reliable and simple method.

[0017] In addition, in the third invention, in the configuration of the first or second invention, the specific element is at least one element selected from the group consisting of Si (silicon), Fe (iron), Cu (copper), Mn (manganese), Mg (magnesium), Zn (zinc), Ti (titanium), and Cr (chromium).

[0018] By using at least one element from among the elements commonly used in aluminum products as the specific element, it becomes possible to identify whether or not the product is a low-carbon emission aluminum product without using a unique element that is not contained in normal aluminum alloys as the specific element.

[0019] In addition, a fourth invention is a method for identifying low-carbon emission aluminum products in which the difference in the content of a specific element in the configuration of the first or second invention is 0.01 mass% or more.

[0020] If the difference in the content of a specific element is 0.01 mass% or more, the difference will be reliably detectable in a general analysis of the elemental composition, thereby improving the reliability of identifying whether or not the product is a low-carbon emission aluminum product.

[0021] The fifth invention is a method for identifying a low-carbon emission aluminum product, in which the specific element is Mn and the content of Mn in the low-carbon emission aluminum product is 0.01% by mass or more and 0.2% by mass or less in the configuration of the first or second invention. The content of Mn is more preferably 0.1% by mass or more and 0.15% by mass or less.

[0022] By selecting Mn, which is contained in ordinary aluminum alloys, as the specific element and setting its content in low-carbon emission aluminum products to between 0.01% and 0.2% by mass, the reliability of identifying whether or not an aluminum product is a low-carbon emission product can be improved. In addition, in the case of Mn, even if the content fluctuates slightly, the physical properties of aluminum do not change significantly, so it is possible to reduce the change in physical properties between the standard aluminum product and the low-carbon emission aluminum product to be identified.

[0023] In addition, in the sixth invention, in the configuration of the first or second invention, the low-carbon emission aluminum product is a low-carbon emission aluminum ingot produced using electricity obtained from renewable energy or a low-carbon emission aluminum product produced using recycled aluminum ingot, and the standard aluminum product is an aluminum product produced using aluminum ingot produced using electricity obtained from fossil fuels.

[0024] By defining the standard aluminum product as an aluminum product manufactured using aluminum ingot produced using electricity derived from fossil fuels, it becomes easy to identify whether the aluminum product to be identified is a low-carbon emission aluminum ingot manufactured using electricity derived from renewable energy or a low-carbon emission aluminum product manufactured using recycled aluminum ingot.

[0025] In addition, the seventh invention is a method for identifying low-carbon emission aluminum products, in which, in the configuration of the first or second invention, the chemical analysis is performed by at least one of the following analytical methods: absorptiometry, atomic absorption spectrometry, ICP atomic emission spectrometry, or ICP mass spectrometry.

[0026] The chemical analysis used for the contained element composition can be performed using analytical methods normally used for aluminum products, which is more scientifically reliable and more convenient.

[0027] In addition, an eighth invention is a low-carbon emission aluminum product that is identified by the identification method in the configuration of the first invention or the second invention.

[0028] With this configuration, it is possible to easily and reliably provide low-carbon emission aluminum products that are identified as having been produced from low-carbon emission aluminum ingots produced using electricity with low carbon dioxide emissions.

[0029] In addition, a ninth aspect of the present invention is the eighth aspect of the present invention, wherein the low-carbon emission aluminum product is a product made of aluminum foil or a product containing aluminum foil.

[0030] With this configuration, it is possible to easily and reliably provide products made of aluminum foil or products containing aluminum foil as low-carbon emission aluminum products that have been identified as having been produced from low-carbon emission aluminum ingot produced using electricity with low carbon dioxide emissions.

[0031] In addition, in the tenth aspect of the present invention, in the configuration of the ninth aspect of the present invention, the product made of aluminum foil is an aluminum foil for cooking, an aluminum foil molded product, or an aluminum foil container.

[0032] With this configuration, it is possible to easily and reliably provide aluminum foil for cooking, aluminum foil molded products, or aluminum foil containers as low-carbon emission aluminum products that have been identified as having been produced from low-carbon emission aluminum ingot produced using electricity with low carbon dioxide emissions.

[0033] In addition, the 11th invention provides a method for determining the authenticity of low-carbon emission aluminum products, comprising at least a first step of chemically analyzing the elemental composition in the aluminum product to be identified and preparing analytical data (including the analytical results); a second step of preparing standard analytical data (including the analytical results) of the chemical analysis of the elemental composition in a standard aluminum product used as a standard; a third step of comparing the analytical data from the first step with the standard analytical data from the second step to obtain comparative data of the elemental composition of the aluminum product to be identified and the standard aluminum product; and a fourth step of calculating the difference in the content of specific elements in the aluminum product to be identified and the standard aluminum product from the comparative data from the third step, and identifying or determining whether the difference is equal to or greater than a predetermined amount.

[0034] By using this type of authenticity determination method, it is possible to determine the authenticity of a low-carbon emission aluminum product by analyzing the contained element composition, which is a scientifically reliable and simple method.

[0035] In addition, the 12th invention is a method for determining the authenticity of low-carbon emission aluminum products, in the configuration of the 11th invention, wherein the first step includes an input and transmission step of a user inputting the analytical data on a user-side information terminal and transmitting it to a server device, the second step includes a storage step of storing standard analytical data in the server device, the third step includes a comparison step of reading out the analytical data provided by the user in the input and transmission step of the first step and the standard analytical data stored in the server device in the storage step of the second step, and obtaining comparison data between the analytical data and the standard analytical data using a program on the server device, and the fourth step includes a display step of identifying whether the difference in the content of a specific element calculated from the comparison data obtained in the comparison step of the third step is equal to or greater than a predetermined amount, and displaying the identification result on the user-side information terminal.

[0036] By using such a method of authenticity determination through a network, the server device displays the identification result as to whether or not the product is a low-carbon emission aluminum product on the user's information terminal in response to input from the user's information terminal, making it easy to obtain the authenticity determination result. Effect of the Invention

[0037] Since the method for identifying low-carbon emission aluminum products according to the invention has been configured as described above, it is now possible to identify whether or not an aluminum product is a low-carbon emission product by analyzing the composition of contained elements, which is a scientifically reliable and simple method. [Brief description of the drawings]

[0038] [Figure 1] Flow of identification method for low carbon emission aluminum products [Diagram 2] Flow of authenticity verification method for low-carbon aluminum products DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] (Method for identifying low carbon emission aluminum products according to an embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The method for identifying low-carbon emission aluminum products of the embodiment shown in Figure 1 includes the following first to fifth steps, and enables identification of whether or not an aluminum product is a low-carbon emission product in a scientifically reliable and simple manner.

[0040] (1st step) The first step shown in FIG. 1 is a step of preparing low-carbon emission aluminum ingot, that is, a step of preparing aluminum ingot manufactured using electricity with low carbon dioxide emissions.

[0041] Low-carbon emission aluminum is aluminum that has been produced using electricity that emits little carbon dioxide. In particular, since a large amount of electricity is consumed during the production of aluminum ingot, producing aluminum ingot using electricity that emits little carbon dioxide as part of such a large amount of electricity makes a significant contribution to reducing the environmental burden. Here, electric power with low carbon dioxide emissions refers to electric power obtained by a power generation method with low carbon dioxide emissions during generation, and there are no particular limitations on the power generation method as long as the power generation method has low carbon dioxide emissions. An example of a power generation method with low carbon dioxide emissions is a power generation method using renewable energy. Examples of the power generation method using renewable energy include power generation using (1) sunlight, (2) wind power, (3) hydroelectric power, (4) geothermal power, (5) solar heat, (6) heat in the atmosphere and other heat present in nature, and (7) biomass (organic matter derived from plants and animals). In addition to power generation methods using renewable energy, power generation methods using nuclear power are also included in power generation methods with low carbon dioxide emissions.

[0042] Furthermore, by using electricity generated by the above-mentioned power generation method with low carbon dioxide emissions in the series of manufacturing processes for obtaining aluminum ingots from common ore raw materials, such as extracting alumina (Al2O3) from bauxite, the raw material for aluminum, and then electrolyzing the resulting alumina to produce aluminum ingots, it is possible to obtain low-carbon emission aluminum ingots.

[0043] In obtaining aluminum metal from bauxite, the method for generating electricity with low carbon dioxide emissions as described above is not limited to one type of power generation method, and a plurality of power generation methods may be used in combination. Ideally, all of the electricity used in producing aluminum ingot is obtained from a power generation method with low carbon dioxide emissions as described above, but this does not exclude the use of electricity obtained from a power generation method that uses fossil energy as fuel, such as thermal power generation, as part of the electricity used. However, in order to reduce the environmental impact during the production of aluminum ingot, it is preferable that the carbon dioxide emissions during the generation of electricity used to obtain 1 ton of low-carbon emission aluminum ingot be kept to 4.0 ton-CO2 / ton-AL or less.

[0044] In addition, the shape of the low-carbon emission aluminum ingot is not particularly limited, and it may be made into an aluminum slab (large rectangular parallelepiped shape), an aluminum billet (cylindrical shape, etc.), or an aluminum ingot (lump shape) as appropriate depending on the application of the aluminum product that will ultimately be manufactured using this ingot. In addition, aluminum ingots that are regenerated (recycled) from aluminum products collected from the market also use much less electricity than aluminum ingots that are produced from scratch using electricity obtained from power generation methods that use fossil energy as fuel, and recycled aluminum ingots can be obtained with just a few percent of the electricity. Therefore, recycled aluminum ingots are also included in the category of aluminum ingots produced using electricity with low carbon dioxide emissions.

[0045] (2nd process) The second step shown in FIG. 1 is a step of preparing a low-carbon emission aluminum product manufactured using the low-carbon emission aluminum ingot prepared in the first step.

[0046] The second process includes a "composition adjustment process" in which the low-carbon emission aluminum ingot prepared in the first process is melted and various metal elements are added depending on the application of the final low-carbon emission aluminum product to adjust the composition so that the final low-carbon emission aluminum product exhibits the desired characteristics. For example, if the low-carbon emission aluminum product is aluminum foil, a molten metal with the desired elemental composition is cast by adding a predetermined amount of a specified metal element component during the melting process of the low-carbon emission aluminum ingot prepared in the first process, to obtain an ingot or aluminum plate. This ingot or aluminum plate can then be subjected to the following processes in order: cold rolling, intermediate annealing, cold rolling, foil rolling, and final annealing, to obtain aluminum foil as the low-carbon emission aluminum product.

[0047] Low-carbon emission aluminum products include generally known products made of aluminum, such as aluminum foil, aluminum plate, aluminum powder, aluminum castings, aluminum die-castings, etc. In addition, when the low-carbon emission aluminum product is a product made of aluminum foil, examples of the low-carbon emission aluminum product include aluminum foil for cooking, aluminum foil molded products, aluminum foil containers, and aluminum foil laminates in which aluminum foil is laminated with other materials.

[0048] (3rd step) The third step shown in FIG. 1 is a step of chemically analyzing the composition of elements contained in the low-carbon emission aluminum product prepared in the second step to prepare analysis data or analysis results.

[0049] Here, as long as the elemental composition contained in the low-carbon emission aluminum product is known, the method of chemical analysis is not particularly limited, and a composition analysis method generally used as a technique for analyzing the composition of aluminum can be used, such as absorptiometry, atomic absorption spectrometry, ICP atomic emission spectrometry, and ICP mass spectrometry. Among these, ICP atomic emission spectrometry and ICP mass spectrometry are preferred since they allow simultaneous quantification of multiple elements, and ICP mass spectrometry is particularly preferred since it allows quantification with higher sensitivity than ICP atomic emission spectrometry.

[0050] (4th step) The fourth step shown in Figure 1 is a step of preparing standard analytical data or standard analytical results of the chemical analysis of the elemental composition in the standard aluminum product to be used as the standard, and comparing the standard analytical data with the analytical data obtained in the aforementioned third step to obtain comparative data on the elemental composition of the standard aluminum product and the low-carbon emission aluminum product.

[0051] Here, the standard aluminum product in the fourth step refers to an aluminum product manufactured using aluminum ingot that is produced using electricity that does not have low carbon dioxide emissions, i.e., electricity that has traditionally been used for many years and has high carbon dioxide emissions; specifically, an aluminum product manufactured using aluminum ingot that is produced using electricity derived from fossil fuels.

[0052] Such an aluminum product is prepared as a standard aluminum product, and standard analysis data (or "standard analysis results") is prepared by obtaining analytical data on the composition of elements contained in the standard aluminum product through chemical analysis. The obtained standard analysis data is then compared with the analytical data obtained in the above-mentioned third step to obtain comparative data on the composition of elements contained in the standard aluminum product and the low-carbon emission aluminum product. By obtaining this comparative data, it becomes possible to extract the difference in the content of specific elements between the standard aluminum product and the low-carbon emission aluminum product in the next step, the fifth step.

[0053] The method for chemically analyzing the elemental composition contained in the standard aluminum product in the fourth step is not particularly limited, and may be the same as the chemical analysis method used in the third step. However, in order to accurately extract the difference in the content of specific elements in the fifth step described below, it is preferable to use the same chemical analysis method as that used in the third step.

[0054] (5th step) The fifth step shown in FIG. 1 is a step of extracting the difference in the content of a specific element between the standard aluminum product and the low-carbon emission aluminum product from the comparison data obtained in the fourth step, and identifying or determining whether the difference is equal to or greater than a predetermined amount.

[0055] In this way, by extracting the difference in the content of specific elements and checking whether the difference is equal to or greater than a predetermined amount, it is possible to identify whether a product is a low-carbon emission aluminum product by the simple method of analyzing the composition of contained elements. For example, when producing low-carbon emission aluminum ingots, the elemental composition contained in the low-carbon emission aluminum ingots is essentially the same as that of the aluminum ingots used in producing standard aluminum products (aluminum ingots produced using electricity derived from fossil fuels); however, if the content of one specific element contained in the low-carbon emission aluminum product is adjusted to be slightly more or less than that of the standard aluminum product at a level on the order of 0.01% by mass, a composition analysis of the elements contained in the standard aluminum product and the low-carbon emission aluminum product produced from each ingot can determine the difference in the content of the specific element, although it is on the order of 0.01% by mass.

[0056] If this is used, for example, when it is necessary to control whether the original aluminum ingot of the same aluminum product manufactured in the same factory is made from low-carbon emission aluminum ingot or conventional aluminum ingot (aluminum ingot manufactured using electricity generated from fossil fuels), it will be possible to easily determine whether the aluminum product to be identified is made from low-carbon emission aluminum ingot by conducting a composition analysis of the elements contained in the aluminum product in combination with, or instead of, tracing the aluminum ingot used as part of the product lot management or process management.

[0057] By using an identification method including the steps described above, it is possible to identify whether an aluminum product is a low-carbon emission aluminum product by the simple method of analyzing the elemental composition contained in the aluminum product. An aluminum product identified as a low-carbon emission aluminum product through the low-carbon emission aluminum product identification method of the embodiment becomes the low-carbon emission aluminum product of the embodiment.

[0058] In the embodiment of the method for identifying low-carbon emission aluminum products, the difference in the content of a specific element between a standard aluminum product and a low-carbon emission aluminum product is extracted, and it is identified whether the difference is equal to or greater than a predetermined amount. There is no particular limitation on which element is selected as this specific element, but it may be at least one of Si (silicon), Fe (iron), Cu (copper), Mn (manganese), Mg (magnesium), Zn (zinc), Ti (titanium), and Cr (chromium). Of course, Al (aluminum), the main component of aluminum products, can also be selected, but it is only possible to determine the difference in the Al content in the aluminum product. Furthermore, even if there is no difference in the Al content, if there is a difference in the content of elements other than Al, there may be a large difference in the physical properties between the standard aluminum product used as the standard and the low-carbon emission aluminum product being identified. In this way, it is easier to control the changes in physical properties by controlling the contents of contained elements other than Al, so it is preferable to select elements other than aluminum.

[0059] The aforementioned elements Si (silicon), Fe (iron), Cu (copper), Mn (manganese), Mg (magnesium), Zn (zinc), Ti (titanium), and Cr (chromium) are elements that are commonly used in aluminum products, and by using at least one element from among the elements that are commonly used in aluminum products as the specific element, it becomes possible to identify whether or not the aluminum product is a low-carbon emission product without using an element that is unique to the specific element.

[0060] In addition, it is preferable for the difference in content of specific elements to be 0.01 mass% or more in order to improve the reliability of identifying whether or not the product is a low-carbon emission aluminum product, it is more preferable for it to be 0.05 mass% or more, and it is even more preferable for it to be 0.1 mass% or more. The upper limit of the difference in the content of a specific element is not limited as long as it is within a range that can suppress changes in physical properties with low-carbon emission aluminum products, but it is preferably 0.2 mass% or less, more preferably 0.15 mass% or less, and even more preferably 0.15 mass% or less.

[0061] Furthermore, as the specific element, Mn is particularly preferred, and the Mn content in the low-carbon emission aluminum product is preferably 0.01 mass% or more and 0.2 mass% or less, more preferably 0.05 mass% or more, and even more preferably 0.1 mass% or more and 0.15 mass% or less. This is preferable because it improves the reliability of identifying whether or not the aluminum product is a low-carbon emission aluminum product, and it also reduces the change in physical properties between the standard aluminum product and the low-carbon emission aluminum product being identified.

[0062] Specifically, when the specific element is Mn and the Mn content in a low-carbon emission aluminum product is between 0.01% by mass and 0.2% by mass, the difference in content can be easily recognized using an analytical method such as ICP atomic emission spectrometry, and the corrosion resistance, mechanical strength, and other characteristics of the low-carbon emission aluminum product will have no or only slight changes in the physical properties and characteristics compared to standard aluminum products.

[0063] As the specific element, Zn is also preferred, but since the content of Zn in the low-carbon emission aluminum product may cause a decrease in the corrosion resistance of the low-carbon emission aluminum product, the content of Zn in the low-carbon emission aluminum product may be 0.2 mass% or less, preferably 0.15 mass% or less, and more preferably 0.1 mass% or less. The lower limit is preferably 0.01 mass% or more, and more preferably 0.05 mass% or more. If it is within this range, the reliability of identifying whether or not the product is a low-carbon emission aluminum product can be improved, and the change in corrosion resistance between the standard aluminum product and the low-carbon emission aluminum product to be identified can be suppressed.

[0064] Low carbon emission aluminum ingots are alloyed with various components. After careful consideration of the Al alloying process, a method for identifying low-carbon emission aluminum alloy foil with a thickness of 20 μm or less was developed that sets the Mn content in the aluminum alloy at 0.01% by mass or more and 0.2% by mass or less, making it easy to distinguish it from general foil. The Mn content can be easily recognized as a difference by ICP atomic emission spectrometry, and is an element that does not easily affect various properties such as corrosion resistance and mechanical strength. Another element that can easily be distinguished from ordinary foils using ICP atomic emission spectroscopy is Zn. However, as mentioned above, Zn is known to reduce corrosion resistance depending on its content. Therefore, Mn, which does not affect product characteristics, is more suitable as the standard element for identification.

[0065] In the embodiment of the method for identifying low-carbon emission aluminum products, when the standard aluminum product is aluminum foil, for example, the aluminum foil contains, in 100 mass% of the aluminum foil, 0.50 mass% to 0.9 mass% Si, 0.60 mass% to 1.0 mass% Fe, 0.1 mass% or less Cu, 0.10 mass% or less Mn, 0.05 mass% or less Mg, 0.10 mass% or less Zn, 0.08 mass% or less Ti, and the remainder being Al and unavoidable impurities. In this case, the composition of the low-carbon emission aluminum product may be set so that the difference in the content of the specific element is a predetermined amount or more that can be analyzed, and it is preferable that the difference is 0.01 mass% or more.

[0066] Therefore, when the composition of a standard aluminum product is within the composition range listed above, the composition of the low-carbon emission aluminum product should be set so that the content of a specific element is at least ±0.01 mass% relative to the composition of the standard aluminum product, preferably at most ±0.2 mass%, more preferably at least ±0.05 mass% to no more than ±0.15 mass%, and even more preferably at least ±0.1 mass%.

[0067] Therefore, when Si is selected as a specific element, it is sufficient that it is contained in the low-carbon emission aluminum product so that the difference in the Si content in the standard aluminum product is 0.01% or more by mass, within the range of 0.30% by mass or more and 1.1% by mass or less. Similarly, when Fe is selected, the specific element should be contained in the low-carbon emission aluminum product in a range of 0.40 mass% or more and 1.2 mass% or less, when Cu is selected, the range of 0.30 mass% or less, when Mn is selected, the range of 0.40 mass% or less, when Mg is selected, the range of 0.30 mass% or less, when Zn is selected, the range of 0.30 mass% or less, and when Ti is selected, the range of 0.25 mass% or less, so that the difference in the content of the specific element in the standard aluminum product is 0.01 mass% or more.

[0068] Among these, when the specific element is Mn and the Mn content in the low-carbon emission aluminum product is between 0.01% by mass and 0.2% by mass, the difference in content can be easily recognized by chemical analysis of the contained element composition, such as ICP atomic emission spectrometry, and the corrosion resistance, mechanical strength, and other characteristics of the low-carbon emission aluminum product will have no or only slight changes in physical properties and characteristics compared to standard aluminum products, as described above.

[0069] (Method for determining authenticity of low carbon emission aluminum products according to an embodiment) Next, the method for identifying low-carbon emission aluminum products of the present invention can also be used as a method for determining the authenticity of low-carbon emission aluminum products, as an application example. Specifically, the method for determining the authenticity of low-carbon emission aluminum products of the embodiment shown in Figure 2 comprises at least the following first to fourth steps, thereby making it possible to scientifically and easily determine the authenticity of whether or not a product is a low-carbon emission aluminum product with high reliability.

[0070] (First Step) The first step shown in FIG. 2 is to perform a chemical analysis of the elemental composition contained in the aluminum product to be identified and prepare analytical data or analytical results. This corresponds to the third step of the method for identifying low-carbon emission aluminum products mentioned above.

[0071] In the authenticity determination method of the embodiment, for example, an aluminum product that is circulating in the market and has the same product label as one's own is obtained, and the elemental composition of the aluminum product is chemically analyzed to determine whether it is a low-carbon emission aluminum product (authenticity determination), and this first step is to prepare the analytical data that forms the basis for this determination.

[0072] Methods for chemically analyzing the elemental composition of the aluminum product to be identified include chemical analysis methods similar to those described in the third step above. Among these, ICP atomic emission spectrometry and ICP mass spectrometry are preferred because they enable simultaneous quantification of multiple elements, and ICP mass spectrometry is particularly preferred because it enables quantification with higher sensitivity than ICP atomic emission spectrometry.

[0073] In addition, as a method for determining authenticity of an embodiment of the invention that is realized through a network, the first step can further include an input / transmission step in which a user inputs analytical data on the composition of elements contained in the aluminum product to be identified on the user's information terminal and transmits the data to a server device.

[0074] For example, a user using the authenticity determination method of the present invention can input the analysis data using an information terminal such as a personal computer, smartphone, tablet, or dedicated input terminal that the user has at hand, and then transmit the analysis data as electronic information to a server device over a network such as the Internet or an intranet. The functions of the server device may be implemented in a single server device, or in multiple server devices. Furthermore, the server device may be realized by so-called cloud-based computer resources. By adopting such an input and transmission step, the user can store the analysis data as electronic information in the server device, making it possible to more simply and quickly obtain identification results as to whether or not the product is a low-carbon emission aluminum product by obtaining comparison data in the third step described below and calculating the difference in the content of specific elements in the fourth step. Furthermore, even if the user is in a remote location, they can quickly obtain the output of the identification results by simply inputting the analysis data into an information terminal.

[0075] (Second step) The second step shown in FIG. 2 is to prepare standard analytical data or standard analytical results of the chemical analysis of the elemental composition contained in the standard aluminum product. This corresponds to the fourth step in the method for identifying low-carbon emission aluminum products mentioned above.

[0076] Here, as in the fourth process described above, standard aluminum products are aluminum products manufactured using aluminum ingots that are produced using electricity that does not have low carbon dioxide emissions, i.e., electricity that has a high carbon dioxide emissions and has been used traditionally for many years, and specifically, aluminum products manufactured using aluminum ingots that are produced using electricity derived from fossil fuels. For example, a company can prepare its own aluminum products (which are known to have been manufactured using aluminum ingots produced using electricity derived from fossil fuels) in advance, and use the aluminum products as standard aluminum products to chemically analyze the contained elemental composition, thereby obtaining standard analytical data. Therefore, this first step is to prepare standard analytical data that will serve as the basis for determining authenticity. The method for chemically analyzing the composition of elements contained in the standard aluminum product in the second step is not particularly limited, and may be the same as the chemical analysis method used in the first step (i.e., the same as the chemical analysis method used in the third step of the method for identifying low-carbon emission aluminum products). In order to accurately extract the difference in the content of specific elements in the fourth step described below, it is preferable to use the same chemical analysis method as that used in the first step.

[0077] In addition, in order to realize the authenticity determination method of the embodiment via a network, the second step may include a storage step of storing the standard analysis data in a server device. For example, if the first step includes an input transmission step, the standard analysis data can be stored in advance in a server device so that the standard analysis data can be immediately provided in the comparison step in the third step described below. In the storage step, the user who uses the authenticity determination method of the present invention may store the standard analytical data in the server device, or a person other than the user may store the standard analytical data in the server device. When a person other than the user stores the standard analysis data in the server device, the user can be called a client, and the person storing the data in the server device can be called a host.

[0078] For example, if the client is an aluminum product purchaser and the host is an aluminum product seller, when the client wants to confirm whether an aluminum product purchased from the host is a low-carbon emission aluminum product, the host can store standard analysis data in advance in a server device, and the client, who is the user, can simply input the analysis data of the aluminum product he or she purchased into an information terminal as the input and transmission step in the first step, and can more easily and quickly obtain identification results as to whether the aluminum product is a low-carbon emission aluminum product by using comparison data in the third step described below and calculating the difference in the content of specific elements in the fourth step. As another example, if the client is a quality control department or sales department for aluminum products and the host is a manufacturing department for aluminum products, when the client needs to provide data indicating that the aluminum product is a low-carbon emission aluminum product in response to pre-shipment quality inspection of the aluminum product or a request from a purchaser of the aluminum product after shipment, it will be possible to more simply and quickly obtain identification results as to whether the aluminum product is a low-carbon emission aluminum product by using comparison data in the third step described below or calculating the difference in the content of specific elements in the fourth step.

[0079] (Third Step) The third step shown in FIG. 2 is a step of comparing the analytical data from the first step with the standard analytical data from the second step to obtain comparative data on the elemental composition of the aluminum product to be identified and the standard aluminum product.

[0080] By comparing the standard analytical data obtained in the second step with the analytical data obtained in the first step, comparative data can be obtained for the analytical data of the elemental composition of the standard aluminum product and the aluminum product analyzed in the first step. By obtaining this comparison data, it becomes possible to extract the differences in the content of specific elements in the standard aluminum product and the aluminum product to be identified in the next step, the fourth step.

[0081] In addition, as a method for realizing the authenticity determination method of the embodiment through a network, the third step can include a comparison step of reading out the analytical data provided by the user in the input transmission step of the first step and the standard analytical data stored in the server device in the storage step of the second step, and obtaining comparison data between the analytical data and the standard analytical data using a program on the server device.

[0082] For example, when the first step includes an input transmission step, the standard analysis data is stored in advance in the server device, so that the standard analysis data can be read out and immediately provided in the comparison step of the third step. Furthermore, by previously setting up a program on the server device for comparing the analytical data with the standard analytical data, comparison data can be easily obtained. In the comparison step, the user who uses the authenticity determination method of the present invention may set the program in the server device, or a person other than the user may set the program in the server device. When a person other than the user sets up the program in the server device, the user is called a client, and the person setting up the program in the server device is called a host.

[0083] (Fourth step) The fourth step shown in Figure 2 is a step in which the difference in the content of a specific element in the aluminum product to be identified and the standard aluminum product is calculated from the comparison data from the third step, and whether or not the difference is equal to or greater than a predetermined amount is identified (or determined).

[0084] In this way, by extracting the difference in the content of specific elements and confirming whether this difference is equal to or greater than a specified amount, it is possible to determine the authenticity of a low-carbon emission aluminum product using a scientifically reliable and simple method of analyzing the composition of the contained elements.

[0085] For example, when producing low-carbon emission aluminum ingots, the elemental composition contained in the low-carbon emission aluminum ingots is essentially almost the same as that of the aluminum ingots used to produce standard aluminum products (aluminum ingots produced using electricity derived from fossil fuels); however, if the content of one specific element contained in the low-carbon emission aluminum ingots is made slightly more or less than that of the standard aluminum product, at the order of 0.01% by mass, then by conducting a composition analysis of the elements contained in the standard aluminum product and the low-carbon emission aluminum product produced from each ingot, the difference in the content of the specific element, although at the order of 0.01% by mass, can be determined.

[0086] If this is used, for example, when it is necessary to control whether the original aluminum ingot of the same aluminum product manufactured in the same factory is made from low-carbon emission aluminum ingot or conventional aluminum ingot (aluminum ingot manufactured using electricity generated from fossil fuels), it will be possible to easily determine the authenticity of the aluminum product to be identified as being made from low-carbon emission aluminum ingot by conducting a composition analysis of the elements contained in the aluminum product in combination with, or instead of, tracing the aluminum ingot used as part of the product lot management or process management.

[0087] As explained in the first step, this is also effective in cases where a company obtains an aluminum product that is circulating on the market and has the same product label as its own, and the aluminum product is labeled as being "a product made from low-carbon emission aluminum ingot," but there are doubts about the origin of the aluminum product (for example, when the aluminum product is a copy of its own aluminum product and there are doubts about whether it uses low-carbon emission aluminum ingot). That is, by comparing the analytical data of the contained element composition between the standard aluminum product obtained through steps 1 to 3 and the aluminum product in question, the difference in the content of specific elements is calculated, and if the difference is equal to or greater than a specified amount, the aluminum product can be determined to be genuine, being made using the company's own low-carbon aluminum ingot.On the other hand, if the difference is less than the specified amount, the product can be determined to be a fake, not an aluminum product made using the company's own low-carbon aluminum ingot. In this way, it is possible to easily and chemically reliably determine the authenticity of low-carbon emission aluminum products.

[0088] In addition, as a method for determining authenticity of the embodiment realized through a network, the fourth step can include a display step of identifying whether the difference in the content of a specific element calculated from the comparison data obtained in the comparison step of the third step is equal to or greater than a predetermined amount, and displaying the identification result on an information terminal on the user's side. The identification result is displayed on the display of the user's information terminal, etc., thereby improving convenience.

[0089] For example, if the first step includes an input and transmission step, the fourth step, the display step, can display the identification result on an information terminal such as a personal computer, smartphone, tablet, or dedicated input terminal that the user has in hand in the first step, thereby making it possible to provide the identification result quickly in response to the user's request. EXAMPLES

[0090] The present invention will be more clearly described below with reference to examples and comparative examples.

[0091] First, we will use aluminum foil as an example of a low-carbon emission aluminum product and explain its manufacturing method. First, low-carbon emission aluminum ingot is prepared, this ingot is melted, and then predetermined metal element components are added to the molten metal having the desired elemental composition, thereby obtaining an ingot or aluminum plate. The casting method is not particularly limited, and may be a method selected from the group consisting of semi-continuous casting, continuous casting, and metal mold casting. The resulting ingot may be subjected to a homogenization heat treatment, for example, at a heating temperature of 300° C. to 630° C. for a heating time of 1 hour to 30 hours.

[0092] The steel sheet is then sent to a rolling step. As the rolling method, a wide variety of known rolling methods such as hot rolling and cold rolling can be used, and there is no particular limitation. The number of hot rolling passes in the hot rolling step and the number of cold rolling passes in the cold rolling step may be appropriately set depending on the desired final thickness. When cold rolling is performed multiple times, it is preferable to perform intermediate annealing. In this case, it is preferable to perform the cold rolling process in the following order: one or more cold rollings, intermediate annealing, and one or more cold rollings. The intermediate annealing is preferably carried out by setting the annealing temperature to 300° C. or more and 630° C. or less and the annealing time to 1 hour or more and 30 hours or less. By employing such a process, the thickness of the aluminum foil can be easily adjusted. Next, after the hot rolling step and the cold rolling step, a foil rolling step is further performed. By providing the foil rolling step, it becomes easier to adjust the thickness of the aluminum foil. The foil rolling step may be performed by overlapping rolling.

[0093] After the foil rolling process, a heat treatment process is carried out as a final annealing. The heat treatment conditions can be exemplified by holding the aluminum foil in a desired gas atmosphere (air, nitrogen, argon, etc.) at 250 to 4000°C for 2 to 50 hours, followed by natural cooling. By carrying out such a heat treatment process, it is possible to obtain the effects of degreasing and softening the aluminum foil surface.

[0094] <Example 1 of how to identify low carbon emission aluminum products> (Example 1: Low carbon emission aluminum product A) In Example 1, low-carbon emission aluminum ingot (aluminum ingot with carbon dioxide emissions of approximately 4 tons or less per ton of aluminum) manufactured using electricity obtained from renewable energy sources such as hydroelectric power was prepared (step 1). This ingot was then melted, and predetermined amounts of specified metal element components were added to cast the molten metal with the desired elemental composition to obtain an aluminum plate with a thickness of 7 mm. This aluminum plate was then subjected to the following steps in order: cold rolling, intermediate annealing, cold rolling, foil rolling, and final annealing, to obtain a low-carbon emission aluminum product A (aluminum foil) with a thickness of 11 μm and the composition shown in Table 1 (step 2). In addition, this elemental composition was set by selecting Mn and Zn as specific elements from the elements contained in the standard aluminum product of Comparative Example 1 described below, and setting the content of these elements to 0.01 mass% or more relative to the standard aluminum product of Comparative Example 1. The composition of the low carbon emission aluminum product A was measured by high frequency inductively coupled plasma optical emission spectrometry using an ICPE9800 manufactured by Shimadzu Corporation (third step: analytical data).

[0095] (Example 2: Low carbon emission aluminum product B) In Example 2, low-carbon emission aluminum ingot (aluminum ingot with carbon dioxide emissions of approximately 4 tons or less per ton of aluminum) manufactured using electricity obtained from renewable energy sources such as hydroelectric power was prepared (step 1). This ingot was then melted, and predetermined amounts of specified metal element components were added to cast the molten metal with the desired elemental composition to obtain an aluminum plate with a thickness of 7 mm. This aluminum plate was then subjected to the following steps in order: cold rolling, intermediate annealing, cold rolling, foil rolling, and final annealing, to obtain a low-carbon emission aluminum product B (aluminum foil) with a thickness of 11 μm and the composition shown in Table 1 (step 2). In addition, this elemental composition was set by selecting Mn as a specific element from the elements contained in the standard aluminum product of Comparative Example 1 described below, and setting this content to be 0.01 mass % or more relative to the standard aluminum product of Comparative Example 1. The composition of the low carbon emission aluminum product B was measured by high frequency inductively coupled plasma optical emission spectrometry using an ICPE9800 manufactured by Shimadzu Corporation (third step: analytical data).

[0096] (Comparative Example 1: Standard Aluminum Product) As Comparative Example 1, aluminum ingot obtained using electricity generated from conventional fossil fuels (aluminum ingot with carbon dioxide emissions of approximately 14 tons per ton of aluminum) was prepared, and this ingot was melted. After that, predetermined amounts of specified metal element components were added to the molten metal with the desired elemental composition, and an aluminum plate with a thickness of 7 mm was cast. This aluminum plate was then subjected to the respective steps of cold rolling, intermediate annealing, cold rolling, foil rolling, and final annealing, in that order, to obtain a standard aluminum product (aluminum foil) with a thickness of 11 μm and the composition shown in Table 1. The composition of the standard aluminum products was measured by high-frequency inductively coupled plasma atomic emission spectrometry using an ICPE9800 manufactured by Shimadzu Corporation (standard analysis data).

[0097] [Table 1]

[0098] (Identification of low carbon emission aluminum products) Using analytical data obtained by chemically analyzing the elemental composition of the aluminum foils obtained in Examples 1, 2, and Comparative Example 1, comparative data was obtained for the elemental composition of standard aluminum products and low-carbon emission aluminum products (step 4). The results are shown in Table 2.

[0099] [Table 2]

[0100] From the results in Table 2, the difference in the content of Mn and Zn as specific elements in the standard aluminum product (Comparative Example 1) and the low-carbon emission aluminum product A (Example 1) was extracted. The differences were 0.0220% by mass and 0.0150% by mass, respectively. Since the low-carbon emission aluminum product A of Example 1 contains 0.01% by mass or more of the specific elements Mn and Zn compared to the standard aluminum product of Comparative Example 1, it was possible to identify it as a low-carbon emission aluminum product (step 5). Similarly, the difference in the content of Mn as a specific element in the standard aluminum product (Comparative Example 1) and the low-carbon emission aluminum product B (Example 2) was extracted, and the difference was 0.1220 mass%. Since the low-carbon emission aluminum product B of Example 2 contains 0.01 mass% or more of the specific element Mn compared to the standard aluminum product of Comparative Example 1, it was possible to identify it as a low-carbon emission aluminum product (step 5).

[0101] <Example 2 of how to identify low carbon emission aluminum products> Ten pieces each of low-carbon emission aluminum products B and standard aluminum products (Sample 1 to Sample 10) were prepared by winding the aluminum foil of Example 2 and Comparative Example 1 onto a paper tube with dimensions of 250 mm width and 7 m length (wound product), which was then placed into a paper packaging box of specified dimensions equipped with a cutting blade and sealed. In addition, because the same paper packaging boxes were used for all the boxes, when the boxes were sealed it was impossible to distinguish from the outside whether the aluminum foil contained therein was low-carbon emission aluminum product B or the standard aluminum product.

[0102] Next, these aluminum products were shuffled and 10 pieces were randomly taken out, and the paper packaging boxes of each were opened to measure the elemental composition of the aluminum foil contained therein by high-frequency inductively coupled plasma atomic emission spectrometry using an ICPE9800 manufactured by Shimadzu Corporation (first step). The results are shown in Table 3.

[0103] [Table 3]

[0104] Separately, the aluminum foil of Comparative Example 1 was measured by high-frequency inductively coupled plasma optical emission spectrometry using an ICPE9800 manufactured by Shimadzu Corporation to prepare standard analysis data (second step). The results are shown in Table 4.

[0105] [Table 4]

[0106] The analytical data from the first step was compared with the standard analytical data from the second step to obtain comparative data on the elemental composition of the aluminum products to be identified, Sample 1 to Sample 10 (third step). The results are shown in Table 5. Next, the difference in the content of Mn, a specific element, between the aluminum products to be identified from sample 1 to sample 10 and the standard aluminum product was calculated from the comparison data obtained in the third step, and it was determined whether the difference was 0.01 mass% or more. If the difference in Mn content was 0.01 mass% or more, it was determined as "Good" (i.e., low-carbon emission aluminum product B), and if the difference in Mn content was less than 0.01 mass%, it was determined as "Poor" (i.e., not low-carbon emission aluminum product B). The results are shown in Table 5.

[0107] [Table 5]

[0108] In this way, by setting the elemental composition so that Mn in low-carbon emission aluminum product B is 0.01 mass% or more as a specific element compared to the standard aluminum product, even if a standard aluminum product and a low-carbon emission aluminum product are mixed and cannot be distinguished by appearance, it is possible to determine whether or not the aluminum product is a low-carbon emission aluminum product by the simple method of analyzing the contained elemental composition. In other words, it was possible to determine that samples 1, 4, 5, 7, 8, and 9 were standard aluminum products, and samples 2, 3, 6, and 10 were low-carbon emission aluminum products.

[0109] The embodiments and examples disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications and alterations within the scope and equivalent meanings.

[0110] The process in the method for identifying low-carbon emission aluminum products and the steps in the method for determining authenticity may include additional processes and steps other than those described in the embodiments. The types of low carbon emission aluminum products are not limited to those exemplified in the embodiments.

Claims

1. A first step of preparing low-carbon emission aluminum ingot produced using electricity with low carbon dioxide emissions; A second step of preparing a low carbon emission aluminum product manufactured using the aluminum ingot; A third step of chemically analyzing the composition of elements contained in the low carbon emission aluminum product prepared in the second step to prepare analysis data; a fourth step of preparing standard analytical data for chemical analysis of the composition of elements contained in the standard aluminum product as a standard, and comparing the standard analytical data with the analytical data obtained in the third step to obtain comparative data of the composition of elements contained in the standard aluminum product and the low-carbon emission aluminum product; A fifth step of extracting a difference in the content of a specific element between the standard aluminum product and the low-carbon emission aluminum product from the comparison data, and identifying or determining whether the difference is equal to or greater than a predetermined amount; A method for identifying low-carbon emission aluminum products, comprising at least:

2. The method for identifying low-carbon emission aluminum products according to claim 1, wherein the low-carbon emission aluminum product is a product made of aluminum foil or a product containing aluminum foil.

3. The method for identifying low-carbon emission aluminum products according to claim 1 or 2, wherein the specific element is at least one element selected from the group consisting of Si (silicon), Fe (iron), Cu (copper), Mn (manganese), Mg (magnesium), Zn (zinc), Ti (titanium), and Cr (chromium).

4. The method for identifying low-carbon emission aluminum products according to claim 1 or 2, wherein the difference in content of the specific element is 0.01 mass% or more.

5. The method for identifying a low-carbon emission aluminum product according to claim 1 or 2, wherein the specific element is Mn, and the content of the specific element in the low-carbon emission aluminum product is 0.01 mass% or more and 0.2 mass% or less.

6. The low-carbon emission aluminum product is an aluminum product manufactured using low-carbon emission aluminum ingot produced using electricity obtained from renewable energy or an aluminum product manufactured using recycled aluminum ingot, The method for identifying low-carbon emission aluminum products according to claim 1 or 2, wherein the standard aluminum product is an aluminum product manufactured using aluminum ingots produced using electricity derived from fossil fuels.

7. The method for identifying low-carbon emission aluminum products according to claim 1 or 2, wherein the chemical analysis is a chemical analysis by at least one of the following analytical methods: absorptiometry, atomic absorption spectrometry, ICP atomic emission spectrometry, or ICP mass spectrometry.

8. A low-carbon emission aluminum product identified by the identification method according to claim 1 or 2.

9. The low-carbon emission aluminum product according to claim 8, wherein the low-carbon emission aluminum product is a product made of aluminum foil or a product including aluminum foil.

10. The low-carbon emission aluminum product according to claim 9, wherein the product made of aluminum foil is a cooking aluminum foil, an aluminum foil molded product, or an aluminum foil container.

11. A first step of chemically analyzing the composition of elements contained in an aluminum product to be identified and preparing analytical data; A second step of preparing standard analytical data of chemical analysis of the elemental composition contained in the standard aluminum product; a third step of comparing the analysis data from the first step with the standard analysis data from the second step to obtain comparative data on the elemental composition of the aluminum product to be identified and the standard aluminum product; a fourth step of calculating a difference in the content of a specific element between the aluminum product to be identified and the standard aluminum product from the comparison data of the third step, and identifying or determining whether or not the difference is equal to or greater than a predetermined amount; A method for determining the authenticity of a low-carbon emission aluminum product, comprising at least the steps of:

12. the first step includes an input / transmission step of a user inputting the analysis data at a user's information terminal and transmitting the analysis data to a server device, The second step includes a storage step of storing the standard analysis data in a server device, the third step includes a comparison step of reading out the analytical data provided by the user in the input transmission step of the first step and the standard analytical data stored in the server device in the storage step of the second step, and obtaining comparison data between the analytical data and the standard analytical data by a program on the server device; The fourth step includes a display step of identifying whether or not the difference in the content of the specific element calculated from the comparison data obtained in the comparison step of the third step is equal to or greater than a predetermined amount, and displaying the identification result on an information terminal of a user. The method for determining the authenticity of a low-carbon emission aluminum product according to claim 11.

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