JP2012197482A - Functional aluminum material and electrolytic treatment method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a functional aluminum material having no reddish brown color resulting from an electrolytic treatment for an anode oxide film of an iodine compound.SOLUTION: An electrolytic treatment after anode oxidation is performed by using an electrolytic bath of medicinal iodine compound TMSOI (trimethyl sulfoxonium iodide) or TMSI (trimethyl sulfonium iodide), wherein the electrolytic bath is added with an anionic surface active surfactant. A good-surface functional aluminum material having a metallic color of the aluminum anode oxide film and restraining pitting caused by using the iodine compound can be produced by making the concentration of the iodine compound 0.1 g/l to 50 g/l and the concentration of the surface active surfactant 0.5 to 10 g/l.

Description

  The present invention relates to a functional aluminum material provided with functions such as antibacterial properties and abrasion resistance, and an electrolytic treatment method thereof.

  The following Patent Document 1 is known as an aluminum material provided with functions such as antibacterial properties due to precipitated iodine in the micropores of the anodized film. According to this, the aluminum material is made of PVPI (polyvinylpyrrolidone iodide) or the like. Electrolytic treatment (voltage 50 V to 300 V, time 1 to 5 min) is carried out in an electrolytic bath of iodine compound, whereby the anodized film has abrasion resistance, antibacterial properties, bactericidal properties, antifungal properties, a photoenvironment catalyst, It is said that excellent results in antibacterial and bactericidal properties were obtained by antibacterial tests, growth inhibition tests by halo test methods against Escherichia coli, and bactericidal performance tests, as well as PVPI concentration. As for the coloring property, each experimental result when the PVPI concentration is 0.03 wt% to 7 wt% is shown, and when the concentration is 0.1 wt% or more, the precipitation iodine While color tone of the anodic oxide film is to be changed to reddish greenish brown by the concentration the density appeared to color tone and 6.0 wt%, the color tone when the concentration of 7 wt% is as the non-uniform.

Japanese Patent No. 2932437

  Thus, the aluminum material provided with functions such as abrasion resistance, antibacterial property, bactericidal property, and photocatalytic catalyst on the anodized film is, for example, handrail, door handle, wall panel due to its antibacterial and bactericidal function. From the building materials such as armrests of counters, wheelchairs, furniture, vehicles, daily necessities, etc. In order to ensure the above function, reddish brown coloring due to precipitated iodine in the anodic oxide film is inevitable, so the color tone may not match the product, and other coloring may be an obstacle, The reddish brown coloration tends to limit the product application.

  The present invention has been made based on such circumstances, and the problem to be solved is that the metal color of the aluminum anodized film is secured while ensuring the function of the precipitated iodine in the pores of the anodized film. It is to provide a novel functional aluminum material having various colors, and to provide an electrolytic treatment method for the functional aluminum material.

  In line with the above-mentioned problems, the present invention provides functions such as antibacterial properties and wear resistance due to precipitated iodine in the pores of the anodized film. An aluminum material having a metallic color and a secondary electrolytic color obtained by subjecting it to a secondary electrolytic treatment with a metal salt. That is, the invention according to claim 1 is formed in a microporous anodic oxide film. It is an aluminum material having functions such as antibacterial properties and abrasion resistance due to the deposited iodine, and the metal color of the aluminum anodic oxide film is retained or dyed by inhibiting or suppressing the coloring of the iodine color due to the deposited iodine. The functional aluminum material is characterized in that it is dyed or retains a secondary electrolytic color by performing a metal salt secondary electrolytic treatment.

  According to the second aspect of the present invention, the electrolytic treatment of the anodized aluminum material is carried out by changing the iodine compound to TMSOI (trimethylsulfoxonium iodide) or TMSI (trimethylsulfonium iodide). As a result of slowing the iodine precipitation reaction by electrolytic treatment on the pores of the anodized film depending on the properties of the TMSOI, it is possible to suppress the iodine precipitation and suppress or suppress the coloring due to the precipitated iodine. Therefore, this is an electrolytic method of an aluminum material provided with functions such as antibacterial properties and abrasion resistance due to precipitated iodine in the pores of the anodized film, and the anodized aluminum material is treated with iodine compound TMSOI (trimethylsulfuric acid). Of Foxonium Iodide) or TMSI (Trimethylsulfonium Iodide) It is a method for electrolytic treatment of a functional aluminum material characterized in that the metal color of the aluminum anodized film is maintained by suppressing or suppressing iodine coloration due to precipitated iodine by performing electrolytic treatment in a bath. is there.

  In addition to the above, the invention described in claim 3 has an aluminum metal color equivalent to the anodic oxide film by a conventional method, in which the concentration of the iodine compound TMSOI is effectively and appropriately suppressed from coloring by the precipitated iodine. The electrolytic treatment method for a functional aluminum material according to claim 2, wherein the concentration of TMSOI or TMSI in the electrolytic bath is 0.1 g / l to 50 g / l. It is a thing.

  In addition to the above, the invention described in claim 4 is equivalent to an anodic oxide film by a conventional method, in addition to the above, by carrying out an electrolytic treatment with an electrolytic bath of the iodine compound TMSOI or TMSI, thereby preventing coloring by the precipitated iodine. While the aluminum metal color can be ensured, there is a tendency to cause pitting, which seems to be caused by the slowdown of the iodine precipitation reaction by using TMSOI or TMSI. Therefore, the generation of the pitting can be suppressed or suppressed, and the electrolytic treatment of the aluminum anodic oxide film without the pitting can be performed. Therefore, this can be used as a surfactant in the TMSOI or TMSI electrolytic bath. The method for electrolytic treatment of a functional aluminum material according to claim 2 or 3, characterized by comprising:

  In addition to the above, the invention according to claim 5 is characterized in that the pitting is caused by local current concentration in the anodized film during the electrolytic treatment, and the addition of a surfactant to the electrolytic bath is included. At this time, by making the surfactant anionic, electrolytic treatment is performed while adsorbing and coating the anodized film and its micropores, and the local current concentration and pitting by this are performed. As a result, it is possible to effectively and reliably suppress the generation of an aluminum material without pitting, so that the surfactant added to the electrolytic bath is an anionic surfactant. The method for electrolytic treatment of a functional aluminum material according to claim 2, 3 or 4.

  In addition to the above, the invention according to claim 6 is also capable of producing an aluminum material having no pitting by effectively and reliably suppressing the occurrence of the pitting in the concentration of the anionic surfactant. This is the method for electrolytic treatment of a functional aluminum material according to claim 5, wherein the concentration of the anionic surfactant is 0.5 to 10 g / l.

  In addition to the above, the invention described in claim 7 performs the sealing treatment of the anodized film after the electrolytic treatment, thereby maintaining the precipitation state of iodine in the micropores as much as possible. The anodized film is subjected to a sealing treatment after the electrolytic treatment so that the durability can be maintained as much as possible. The method for electrolytic treatment of a functional aluminum material described in 1.

  The present invention uses these as the gist of the invention and is a means for solving the above problems.

  Since the present invention is configured as described above, the invention according to claim 1 suppresses coloring of precipitated iodine with respect to imparting functions such as antibacterial properties and abrasion resistance due to precipitated iodine in the pores of the anodized film. To suppress the metal color of the aluminum anodic oxide film, and as the secondary electrolysis color by subjecting it to the metal salt secondary electrolysis treatment, while ensuring the function of the precipitated iodine in the micropores of the anodic oxide film It is possible to provide a novel functional aluminum material having a metal color of an aluminum anodized film and having various colors.

  According to the second aspect of the present invention, the electrolytic treatment of the anodized aluminum material is performed by electrolytic treatment of the pores of the anodized film depending on the properties of the TMSOI by setting the iodine compound to TMSOI or TMSI. As a result of slowing the iodine precipitation reaction, it is possible to provide an electrolytic treatment method for the above functional aluminum material that can suppress the precipitation of the iodine and suppress or suppress the coloring caused by the precipitated iodine.

  In addition to the above, the invention according to claim 3 is an aluminum metal color equivalent to an anodic oxide film by a conventional method in which the concentration of the iodine compound TMSOI or TMSI is effectively and appropriately inhibited from coloring by the precipitated iodine. The electrolytic treatment method can be used.

  In addition to the above, the invention described in claim 4 includes a surfactant added to the electrolytic bath of the iodine compound TMSOI or TMSI, thereby causing a decrease in iodine precipitation due to the use of TMSOI or TMSI. Generation | occurrence | production of the pitting seen to generate | occur | produce can be suppressed thru | or suppressed, and it can be set as the electrolytic treatment method of the aluminum anodic oxide film without pitting.

  In addition to the above, the invention described in claim 5 is an anionic surfactant, so that the electrolytic treatment is performed while adsorbing and covering the anodized film and its micropores. Thus, it is possible to provide an electrolytic treatment method in which the local current concentration and the occurrence of pitting due to this are effectively and reliably suppressed to obtain an aluminum material without pitting.

  In addition to the above, the invention according to claim 6 is an electrolytic treatment method in which, in addition to the above, the concentration of the anionic surfactant effectively and reliably suppresses the occurrence of the pitting, thereby obtaining an aluminum material without pitting. It can be.

  In addition to the above, the invention described in claim 7 performs the sealing treatment of the anodized film after the electrolytic treatment, thereby maintaining the precipitation state of iodine in the micropores as much as possible. The electrolytic treatment method can maintain the durability as much as possible.

It is process drawing which shows the surface treatment process of a functional aluminum material. It is process drawing which shows the surface treatment process of the functional aluminum material which concerns on another example.

  Hereinafter, the present invention will be described in more detail. The functional aluminum material of the present invention is provided with functions such as antibacterial properties and abrasion resistance due to precipitated iodine in the pores of the anodized film, By suppressing or suppressing iodine coloration due to iodine, the metal color of the aluminum anodic oxide film is retained or the secondary electrolytic color is retained by subjecting it to metal salt secondary electrolysis. In addition to other functions except reddish brown colorability in the technology, such as its abrasion resistance, antibacterial properties, bactericidal properties, antifungal properties, photoenvironmental catalysts, etc., anodic oxide coatings that are highly toxic As a product having a metal color of an anodized film according to a conventional method to which various functions such as antiviral properties and lubricity are given, and as a product having a secondary electrolytic color of a metal salt, building materials, furniture, vehicles, Machine including daily necessities and sliding parts It can be a versatile application available functionality aluminum material of such components.

  The functional aluminum material is obtained by depositing iodine in the micropores of the aluminum anodic oxide film. The deposited iodine is TMSOI (trimethylsulfoxonium iodide) or TMSI (trimethyl) used as an iodine compound. It is derived from TMSOI or TMSI, which is released from (sulfonium iodide) and deposited in the micropores, and the functional aluminum material suppresses or suppresses the pitting of the surfactant used in the electrolytic treatment. Therefore, there is no film defect including the pitting, so that the aluminum material exhibits a metal color with a good appearance similar to, for example, an aluminum material anodized according to a conventional method. In addition, according to a conventional method, the metal salt that has been additionally subjected to secondary electrolytic treatment should be colored, and further by iodine precipitation. The aluminum material has properties having various functions, and the aluminum material is used as it is, or as necessary, in accordance with a conventional method, as an additional measure for improving corrosion resistance, for example, subjected to sealing treatment and used as a product. As a thing. In addition, it is preferable to use this aluminum material as a thing which does not generally have a coating film layer, and this has the possibility of the function fall thru | or functional damage of iodine precipitation by forming a coating film layer in an anodized film In particular, when the coating film is thermosetting, there is a possibility of functional damage due to iodine sublimation during the thermosetting.

  The functional aluminum material will be described in relation to its surface treatment method, in particular, the electrolytic treatment method. For example, the surface treatment method includes degreasing treatment, etching treatment, neutralization treatment, anodization as shown in FIG. As shown in FIG. 2, the secondary electrolytic treatment of the metal salt is an additional step after the electrolytic treatment, and during each treatment of these steps, as shown in FIG. Each of them is subjected to a water washing treatment, and each treatment other than the electrolytic treatment described in detail below is performed in accordance with a conventional method or in accordance with the conventional method, including an anodizing treatment and a sealing treatment. .

  At this time, the electrolytic treatment is performed by subjecting the aluminum material after the anodizing treatment to electrolytic treatment in an electrolytic bath of iodine compound TMSOI (trimethylsulfonium iodide) or TMSI (trimethylsulfonium iodide). This is based on a method of keeping the metal color of the aluminum anodized film by suppressing or suppressing the coloring of iodine color by iodine.

  That is, the aluminum material can be provided with functionality by precipitating iodine in the micropores of the anodic oxide film, and the precipitated iodine is converted from the iodine compound to TMSOI of the following molecular formula or By using TMSI, electrolytic treatment with the iodine compound is performed so as to derive from TMSOI or TMSI.

  TMSOI is a white or slightly yellow crystalline powder, and TMSI showing the same properties as this is a white powder, both of which are for pharmaceutical use, but TMSOI or TMSI is used as an iodine compound for the electrolytic treatment. Since the iodine precipitation efficiency is lower than PVPI, the iodine precipitation reaction can be slowed during the electrolytic treatment, and the quantitative regulation of precipitation in the micropores of the anodized film and the uniformity of the precipitation are used. Therefore, it is recognized that coloring due to precipitated iodine can be suppressed or suppressed.

TMSOI or TMSI of concentration which, 1 g / l, and 5 g / l, the quantity of electricity to ^2C / ^dm 2, when performing electrolytic treatment as ^{4.5C / dm 2, 9C / dm} 2, 18C / dm 2, In any case, there is no coloring of the precipitated iodine. As in Experimental Example 3, in the case of PVPI, the aluminum material is colored at an electric amount of 4.5 C / dm ² or more, whereas the concentration and electric amount are Regardless of this, it is possible to exhibit a remarkable color deterring property, completely deter coloring, and exhibit a metal color equivalent to an anodized film by a conventional method. In addition, according to the electrolytic treatment using TMSOI or TMSI, since it is possible to ensure coloring suppression even in the above-described increase and decrease in the amount of electricity, the current management range can be expanded during the electrolytic treatment. In addition to eliminating the complexity, it is possible to secure a high yield of the functional aluminum material during factory production and to ensure good production efficiency.

  The concentration of TMSOI or TMSI in the electrolytic bath is preferably 0.1 g / l to 50 g / l, particularly preferably 1 g / l to 10 g / l. That is, when the concentration of TMSOI is less than 0.1 g / l, it becomes difficult to impart functions such as antibacterial properties to the anodized film, and when it exceeds 50 g / l, there is a change in imparting functions such as antibacterial properties. This is because the amount of iodine compound used becomes excessive and there is no technical meaning of increasing the concentration, resulting in an economic loss. Moreover, if it is less than 1 g / l, it tends to cause the tendency to impart functions such as antibacterial properties to be insufficient, and if it exceeds 10 g / l, it tends to cause excessive use of iodine compounds.

Thus, by performing electrolytic treatment using TMSOI or TMSI as an iodine compound, coloring due to precipitated iodine can be suppressed or suppressed, and particularly suppressed, but the amount of electricity during the electrolytic treatment is, for example, 9 C / dm ² . If it is less than this, it tends to be impossible to effectively secure antibacterial properties and the like, so the amount of electricity is preferably 9 C / dm ² or more.

  On the other hand, when an electrolytic treatment is performed in an electrolytic bath using the TMSOI or TMSI, the anodized film tends to cause pitting, and the pitting is caused by the concentration of TMSOI or TMSI, the amount of electricity in the electrolytic treatment, and the like. Even if the conditions are changed, it is difficult to suppress or suppress the coloration. Therefore, even if the coloration due to the precipitated iodine can be suppressed or suppressed, the pitting causes a film defect, resulting in an appearance defect. Aside from the above, it will become a factor in inhibiting the further commercialization of building materials.

  Therefore, as a result of further investigation, the pitting can be suppressed or suppressed by adding a surfactant to the TMSOI or TMSI electrolytic bath. At this time, the surfactant added to the electrolytic bath is contained. Of an anionic surfactant can effectively suppress the occurrence of the pitting. Therefore, if electrolytic treatment of TMSOI or TMSI using an anionic surfactant is performed, coloring by precipitated iodine It is possible to obtain a functional aluminum material in which both the suppression of pitting and the suppression of pitting are performed simultaneously by the electrolytic treatment, foaming, liquid separation (precipitation), etc. even if the anionic surfactant is added and contained There is no adverse effect on the electrolytic bath, and the amount of addition can be limited by using a nonionic surfactant as the surfactant. Thus, it was obtained a finding that there is no adverse effect on the electrolytic bath, such as suppression of pitting similarly to the anionic surfactant and foaming or liquid separation (sedimentation). On the other hand, if the surfactant is made cationic and amphoteric, even if the amount of addition is limited, pitting cannot be suppressed or suppressed, so the surfactant is anionic or nonionic. In particular, it is appropriate to use an anionic one.

  Surfactants, particularly anionic and nonionic, exhibit the action of inhibiting or suppressing pitting because the surfactant penetrates into the micropores of the anodized film and effectively and reliably prevents the micropores. It is recognized that it covers and contributes to uniform current supply during electrolytic treatment by preventing or alleviating local current concentration that causes pitting. At this time, in the case of an anionic surfactant, the treated aluminum material is used as an anode, so that the surfactant is immediately attracted to the anodized film by energization and adsorbed in the micropores, In order to make the electrical resistance in the micropores uniform and stabilize the electrochemical properties, TMSOI or TMSI, which is inferior in precipitation efficiency compared with the PVPI in the state of the electrical resistance being uniform, is a dull iodine. Since precipitation starts, a time difference is generated between the surfactant coating in the micropores and iodine precipitation, ensuring that the anti-pitting action is ensured and the precipitated iodine is homogenized, thus demonstrating its functionality. It is done. On the other hand, cationic and amphoteric surfactants are repelled from the aluminum material when energized, and cannot be coated, so that they cannot exhibit the effect of inhibiting or suppressing pitting due to the use of surfactants. It is recognized that this results in power concentration and resulting pitting.

  Thus, when performing electrolytic treatment of an aluminum material using TMSOI or TMSI as an iodine compound in an electrolytic bath, adding and containing a surfactant at the same time, making this anionic or nonionic, It is preferable for easily and reliably obtaining an aluminum material that retains the metal color of the aluminum anodic oxide film, or retains the secondary electrolytic color by subjecting it to metal salt secondary electrolysis and exhibits a good appearance without pitting. . However, when the concentration of the anionic surfactant added to the electrolytic bath is high, the coloring due to the precipitated iodine tends to be restored regardless of the concentration of TMSOI or TMSI, and the nonionic surfactant When using these surfactants, it is preferable to pay attention to the concentration so as not to impair the coloration inhibition or suppression action of TMSOI or TMSI.

  The concentration of the surfactant added to the electrolytic bath, particularly the anionic surfactant, is preferably 0.5 to 10 g / l, particularly preferably 1 to 7 g / l. .

  That is, when the concentration of the anionic surfactant is less than 0.5 g / l, a tendency of pitting occurs in the anodized film, and when it exceeds 10 g / l, the concentration of TMSOI or TMSI is 1 g / l or more. In this case, it causes the tendency of coloring of precipitated iodine and the possibility of film peeling due to destruction of the anodic oxide film, and when it is less than 1 g / l, it tends to show signs of occurrence of pitting, This is because when the concentration exceeds 7 g / l, when the TMSOI or TMSI concentration is 1 g / l or more, there is a tendency to show signs of coloring due to precipitated iodine and the tendency of film peeling due to the above-mentioned film destruction is observed.

  Accordingly, the concentrations of TMSOI or TMSI and anionic surfactant are 1 g / l to 10 g / l for TMSOI or TMSI, and 1 g / l to 10 g / l for anionic surfactant. It is preferable to set it as 7 g / l. By setting it as this concentration range, the aluminum material provided with the said functionality can be obtained reliably.

  Incidentally, the surfactant is preferably anionic as described above, but both cationic and anionic and cationic surfactants cannot be expected to suppress or suppress pitting. Should be avoided. In addition, nonionic surfactants have a slightly lower anti-pitting or suppressing action than anionic ones. For example, when the concentration in the electrolytic bath is about 3 g / l, it is equivalent to anionic ones. Inhibition or suppression of picking, in particular, it is possible to obtain a deterrent effect and also prevent fluctuations in liquid level due to bubbles and liquid separation (precipitation), so when using this nonionic one, suppression or suppression of pitting, In particular, from the viewpoint of inhibition, it is preferably in the range of 1 g / l to 6 g / l.

Further, in the electrolytic treatment, the remaining electrolytic conditions are such that the amount of electricity is 9 C / dm ² or more and the upper limit is 20 C / dm ^2, and the electrolysis time may be about 1 to 10 minutes. When the amount of electricity exceeds 20 C / dm ² , a tendency of coloring with iodine is caused. In order to perform the sealing, a hot water treatment at 80 ° C. or more for a predetermined time may be performed with or without a sealing agent.

  As described above, the aluminum material after the anodizing treatment is subjected to an electrolytic treatment in an electrolytic bath of the iodine compound TMSOI or TMSI, thereby avoiding coloring due to precipitated iodine and maintaining the metal color of the aluminum anodized film. In addition to providing various functions such as abrasion resistance, antibacterial properties, bactericidal properties, antifungal properties, photoenvironmental catalytic properties, antiviral properties, lubricity, etc. Less functional aluminum material can be used, and by adding a surfactant (excluding cationic and amphoteric ones) to the electrolytic bath, the surfactant can be used to inhibit or suppress pitting, especially the inhibitory action. Therefore, the occurrence of the pitting can be suppressed and the surface defect can be eliminated.

  In carrying out the present invention, including making aluminum material into a shape, panel material, and casting, aluminum material, anodized film, precipitated iodine, secondary electrolytic color, electrolytic treatment method, TMSOI or Each concrete shape such as TMSI, electrolytic bath, electrolytic treatment, surfactant, concentration, etc., material, structure, amount, application, relationship between these, addition to these, etc. are in various forms as long as they do not contradict the gist of the invention. Can be.

Experimental example 1

An aluminum material is immersed in a sulfuric acid bath of 170 g / l of sulfuric acid, and an anodizing treatment of 120 A / m ² × 815 seconds is performed to form an anodized film with a film thickness of 5 μm on the aluminum material. As a TMSOI, an aluminum bath is immersed in an electrolytic bath having concentrations of 1 g / l and 5 g / l, and an electrolytic bath containing an anionic surfactant concentration of 1 g / l in the same concentrations of 1 g / l and 5 g / l, respectively. 55V (soft start 10 seconds), at 25 ° C., the amount of electricity to ^2C / ^dm 2, subjected to electrolytic treatment as ^{4.5C / dm 2, 9C / dm} 2, 18C / dm 2, colored presence and pitting by precipitation iodine Presence or absence was determined by visual inspection. Table 1 shows the results of the presence or absence of coloring, and Table 2 shows the results of the presence or absence of pitting.

  In any case, coloring of precipitated iodine was not observed. Pitching was observed on the entire surface of the anodic oxide film in the electrolytic treatment of the electrolytic baths of TMSOI concentrations of 1 g / l and 5 g / l, but the electrolytic treatment of the electrolytic bath containing an anionic surfactant was added, Pitting was not observed.

Experimental example 2

As PVPI iodine compound, except that a concentration 0.1g / l, 1g / l, as 5 g / l, and the amount of electricity ^2C / dm 2, and ^{4.5C / dm 2, 9C / dm} 2, similarly to Experimental Example 1 As a result, the presence or absence of coloring due to precipitated iodine was determined visually. The results are shown in Table 3.

Colored when an electrical quantity 2C / dm ² is not recognized, but colored red-brown when 4.5C / dm ² and 9C / dm ² was observed.

Experimental example 3

  The TMSOI concentration was changed to 1 g / l, and the added surfactant was changed to anionic, cationic, amphoteric and nonionic, and the concentrations were changed to 0.1 g / l, 1.0 g / l and 3.0 g / l, respectively. Except for the change to 1 and 5.0 g / l, the presence or absence of pitting was determined in the same manner as in Experimental Example 1. The results are shown in Table 4.

  Pitting is not recognized at all in the anionic substances having a concentration of 1 g / l, 3 g / l, and 5 g / l, and a good appearance is exhibited, an anionic property having a concentration of 0.1 g / l, a concentration of 0.1 g / l, 1 For nonionic ones having a concentration of 3 g / l and a concentration of 5 g / l, slight pitting that was discernible when observed was observed. On the other hand, pitting was observed on the entire surface of the cationic and amphoteric regardless of the concentration.

Experimental Example 4

  The TMSOI concentrations were 0.1 g / l, 1.0 g / l, 45 g / l, and the added surfactant was anionic to give concentrations of 0.1 g / l, 1.0 g / l, 3 g / l, 5 g / l. By changing to 10 g / l, 20 g / l, and 40 g / l, the presence or absence of coloring, pitting, and film peeling by precipitated iodine was determined (the experiment was omitted for some concentrations). The results are shown in Table 5.

  When the concentration of TMSOI is low, there is an effect of inhibiting pitting at an anionic surfactant concentration of 1 g / l or more. However, when the concentration is 10 g / l or more, colored iodine and peeling of the film can be seen. When the anionic surfactant concentration is 3 g / l or more, there is a pitting suppression effect, but when the anionic surfactant concentration is 10 g / l or more, coloring of precipitated iodine is observed.

Experimental Example 5

  The same procedure as in Experimental Example 4 was conducted except that the added surfactant was a nonionic surfactant. The results are shown in Table 6.

  Similarly, when the TMSOI concentration is low, there is a pitting suppression effect at a nonionic surfactant concentration of 1 g / l or more, but coloring of precipitated iodine is observed as a whole, and when the TMSOI concentration is high, there is no film peeling. However, the pitting inhibition or suppression action is impaired and pitting occurs.

Experimental Example 6

  Using the electrolytic bath of Experimental Example 4, the state of liquid separation of the bath left for 1 day after electrolysis was evaluated. In addition, the state of foaming when the glass rod was stirred 20 times in about 10 seconds was evaluated. The results are shown in Table 7.

  Even when the concentrations of TMSOI and anionic surfactant were increased, foaming was small and liquid separation was not observed. Therefore, it is shown that when the concentration is increased, the carry-out loss during the electrolytic treatment increases, resulting in an increase in cost.

Experimental Example 7

  Using the electrolytic bath of Experimental Example 5, the same operation as in Experimental Example 6 was performed. The results are shown in Table 8.

  When the concentration of the nonionic surfactant was increased to 1 g / l or more, there was no foaming, but a tendency for liquid separation to occur was observed.

Claims (7)

  Aluminum material with antibacterial and antiwear properties due to precipitated iodine in the pores of the anodized film, and the metal color of the aluminum anodized film by inhibiting or suppressing the coloring of iodine color due to the deposited iodine A functional aluminum material characterized in that the dyeing or secondary electrolysis color is retained by dyeing or subjecting this to a dyeing or metal salt secondary electrolysis treatment.   An electrolytic method of an aluminum material to which functions such as antibacterial properties and abrasion resistance due to precipitated iodine in the pores of the anodized film are provided, and the anodized aluminum material is converted into an iodine compound TMSOI (trimethylsulfoxo). The metal color of the aluminum anodic oxide film is maintained by inhibiting or suppressing the coloring of iodine color by precipitated iodine by applying electrolytic treatment in an electrolytic bath of (Ni-Iodide) or TMSI (Trimethylsulfonium Iodide). A method for electrolytic treatment of a functional aluminum material.   The electrolytic treatment method for a functional aluminum material according to claim 2, wherein the concentration of TMSOI or TMSI in the electrolytic bath is 0.1 g / l to 50 g / l.   4. The method for electrolytic treatment of a functional aluminum material according to claim 2, wherein a surfactant is added to the TMSOI or TMSI electrolytic bath.   The method for electrolytic treatment of a functional aluminum material according to claim 2, 3 or 4, wherein the surfactant added to the electrolytic bath is an anionic surfactant.   6. The method for electrolytic treatment of a functional aluminum material according to claim 5, wherein the concentration of the anionic surfactant is 0.5 to 10 g / l.   7. The method for electrolytic treatment of a functional aluminum material according to claim 2, wherein a sealing treatment is applied to the anodized film after the electrolytic treatment.

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