WO2017170370A1 - アルミニウム合金の陽極酸化皮膜用封孔処理液、濃縮液及び封孔処理方法 - Google Patents
アルミニウム合金の陽極酸化皮膜用封孔処理液、濃縮液及び封孔処理方法 Download PDFInfo
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- WO2017170370A1 WO2017170370A1 PCT/JP2017/012340 JP2017012340W WO2017170370A1 WO 2017170370 A1 WO2017170370 A1 WO 2017170370A1 JP 2017012340 W JP2017012340 W JP 2017012340W WO 2017170370 A1 WO2017170370 A1 WO 2017170370A1
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- sealing treatment
- sealing
- metal salt
- treatment liquid
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/086—Organic or non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
Definitions
- the present invention relates to a sealing treatment liquid for an anodized film of aluminum alloy, a concentrated liquid, and a sealing treatment method.
- the aluminum alloy anodic oxide film is generally subjected to a sealing treatment in order to prevent contamination and improve corrosion resistance.
- sealing methods include boiling water sealing, water vapor sealing, room temperature sealing, nickel acetate sealing that performs sealing using a nickel acetate aqueous solution (see Non-Patent Document 1 below).
- nickel acetate sealing is easy because the corrosion resistance of the film can be easily obtained compared to boiling water sealing, the work efficiency is superior to water vapor sealing, and liquid management is easier than normal temperature sealing. Is particularly used.
- the present invention has been made in view of the above-described problems of the prior art, and is a sealing treatment liquid that does not contain a nickel salt, which is similar to the case where a sealing treatment liquid containing a nickel salt is used. It is an object of the present invention to provide a sealing treatment liquid that can provide sealing performance and that the anodized film subjected to sealing treatment can exhibit excellent contamination resistance.
- the present inventor has intensively studied to achieve the above-mentioned purpose.
- a sealing treatment solution for an anodized film of an aluminum alloy containing a metal salt, a pH buffering agent and a surfactant, wherein the metal salt is at least selected from an alkali metal salt and an alkaline earth metal salt According to one type of sealing treatment liquid, it has been found that the above object can be achieved, and the present invention has been completed.
- the present invention relates to the following sealing treatment solution for anodized film of aluminum alloy, concentrated solution, and sealing treatment method.
- a sealing solution for an anodized film of an aluminum alloy containing a metal salt, a pH buffer and a surfactant, The sealing treatment liquid, wherein the metal salt is at least one selected from the group consisting of an alkali metal salt and an alkaline earth metal salt.
- the sealing treatment liquid according to Item 1 wherein the metal salt is a metal salt of at least one metal selected from the group consisting of Na, Mg, K, and Ca. 3.
- the sealing treatment liquid according to Item 1, wherein the metal salt is a metal salt of at least one metal selected from the group consisting of Mg and Ca. 4).
- Item 4. The sealing treatment liquid according to any one of Items 1 to 3, wherein the metal salt is a nitrate. 6).
- the pH buffering agent is at least one selected from the group consisting of organic acid salts, ammonium salts, amino acids, borates, amine compounds, and nitrogen-containing heterocyclic compounds. Sealing treatment liquid. 7).
- Item 6. The sealing treatment solution according to any one of Items 1 to 5, wherein the pH buffer is a nitrogen-containing heterocyclic compound. 8).
- a concentrate of a sealing treatment solution for an anodized film of an aluminum alloy containing a metal salt, a pH buffer and a surfactant is characterized in that the metal salt is at least one selected from the group consisting of alkali metal salts and alkaline earth metal salts.
- a method for sealing an anodized film of an aluminum alloy A step of immersing an article having an anodized film of an aluminum alloy in a sealing solution for anodized film of an aluminum alloy;
- the sealing treatment liquid contains a metal salt, a pH buffer and a surfactant,
- the metal salt is at least one selected from the group consisting of alkali metal salts and alkaline earth metal salts.
- the sealing treatment liquid of the present invention it is possible to provide a sealing performance equivalent to that when using a sealing treatment liquid containing a nickel salt to the anodized film of an aluminum alloy, and Excellent stain resistance can be imparted.
- the sealing treatment solution for an anodic oxide film of the aluminum alloy of the present invention can be easily prepared only by diluting the concentrated solution.
- a sealing performance comparable to that when a sealing solution containing a nickel salt is used for an anodized film of an aluminum alloy. Can be imparted, and excellent stain resistance can be imparted.
- the sealing treatment liquid of the present invention is a sealing treatment liquid for an anodic oxide film of an aluminum alloy containing a metal salt, a pH buffer and a surfactant, and the metal salt comprises an alkali metal salt and It is at least one selected from alkaline earth metal salts.
- the metal salt contained in the sealing treatment liquid of the present invention is at least one selected from the group consisting of alkali metal salts and alkaline earth metal salts. Although it does not specifically limit as said alkali metal salt and alkaline-earth metal salt, A water-soluble thing is preferable and carboxylate, sulfamate, sulfate, nitrate, organic sulfonate, etc. are mentioned. Among these, carboxylate, sulfamate, sulfate, and nitrate are preferable in that the anodized film of the aluminum alloy subjected to sealing treatment has excellent contamination resistance, and acetate, sulfamate, sulfate, and nitrate are preferable. Are more preferable, acetate and nitrate are more preferable, and nitrate is particularly preferable.
- the said metal salt can be used individually by 1 type or in mixture of 2 or more types.
- the metal contained in the metal salt is not particularly limited as long as it is an alkali metal and an alkaline earth metal.
- Li, Be, Na, Mg, K, Ca, Rb, Sr, Cs, Ba, Fr and Ra can be used.
- Na, Mg, K, and Ca metal salts are preferable, Mg and Ca metal salts are more preferable, and Mg metal is preferable in that the anodized film of the aluminum alloy that has been subjected to sealing treatment has excellent contamination resistance. More preferably, it is a salt.
- the metals contained in the metal salt can be used alone or in combination of two or more.
- the concentration of the metal salt in the sealing treatment liquid is not particularly limited, but is preferably 0.001 to 1 mol / L, and more preferably 0.01 to 0.5 mol / L.
- concentration of the metal salt is within the above range, the sealing treatment liquid can exhibit sufficient sealing performance, and the anodized film of the aluminum alloy sealed with the sealing treatment liquid has sufficient contamination resistance. Can be shown.
- PH buffer It does not specifically limit as a pH buffer agent, A conventionally well-known pH buffer agent can be used.
- pH buffering agents include organic acid salts, ammonium salts, amino acids, borates, amine compounds, nitrogen-containing heterocyclic compounds, and the like.
- a nitrogen-containing heterocyclic compound is preferable in that it can impart excellent stain resistance to the anodized film of the aluminum alloy sealed with the sealing solution.
- organic acid salts include salts of carboxylic acids and oxycarboxylic acids.
- the carboxylic acid and oxycarboxylic acid preferably have 4 or less carbon atoms.
- sodium salt and potassium salt are mentioned as said salt.
- ammonium salts include ammonium salts of organic acids and inorganic acids.
- examples of the organic acid ammonium salt include ammonium salts of carboxylic acids and oxycarboxylic acids.
- the carboxylic acid and oxycarboxylic acid preferably have 4 or less carbon atoms.
- examples of the inorganic acid ammonium salt include ammonium sulfate salt, ammonium nitrate salt, ammonium sulfamate, and the like.
- amino acids include glycine, alanine, asparagine and their salts.
- borates include sodium borate, potassium borate, and ammonium borate.
- the amine compound include monoethanolamine, diethanolamine, ethanolamine which is triethanolamine, and alkylamine, aromatic amine, water-soluble carbonylamine such as urea, and the like.
- nitrogen-containing heterocyclic compound examples include a heterocyclic compound containing at least one nitrogen atom as a hetero atom, and a heterocyclic compound containing at least one nitrogen atom and at least one oxygen atom as a hetero atom.
- nitrogen-containing heterocyclic compound examples include ethyleneimine ring, azirine ring, azetidine ring, azeto ring, pyrrolidine ring, pyrrole ring, piperidine ring, pyridine ring, hexamethyleneimine ring, azatropyridene ring, imidazole ring, pyrazole ring, oxazole
- pyrrolidine ring, pyrrole ring, piperidine ring, pyridine ring, hexamethyleneimine ring, azatropyridene ring, imidazole ring, pyrazole ring, oxazole ring, imidazoline ring, pyrazine ring, morpholine ring, pteridine ring, purine ring, etc. are included.
- Nitrogen-containing heterocyclic compounds are preferred.
- nitrogen-containing heterocyclic compound examples include ethyleneimine, azirine, azetidine, azeto, pyrrolidine, pyrrole, piperidine, pyridine, hexamethyleneimine, azatropylidene, imidazole, pyrazole, oxazole, imidazoline, pyrazine, morpholine, pteridine, purine and the like. And compounds in which an amino group or a methyl group is added to these skeletons can be used. Among these, a cyclic 5-membered to 7-membered heterocyclic compound having 1 or 2 nitrogen atoms as a hetero atom and having carbon or one hetero atom oxygen and carbon is preferable.
- Examples include compounds such as pyrrolidine, pyrrole, piperidine, pyridine, hexamethyleneimine, azatropyridene, imidazole, pyrazole, oxazole, imidazoline, pyrazine, morpholine, and compounds having a cyclic skeleton as a basic structure.
- those having a 5- to 6-membered ring are more preferable, and examples thereof include compounds such as pyrrolidine, pyrrole, piperidine, pyridine, imidazole, pyrazole, oxazole, imidazoline, pyrazine, morpholine, and a compound group having a basic structure of the cyclic skeleton.
- compounds such as pyrrole, pyridine, imidazole, pyrazole, oxazole, imidazoline and pyrazine having a double bond in the ring and a compound group having a cyclic skeleton as a basic structure are particularly preferable.
- substituent constituting these compound groups examples include an amino group and a methyl group, and a compound group to which these substituents are added may be used.
- aminopyridine such as 2-aminopyridine and 4-aminopyridine
- methylimidazole such as 2-methylimidazole are particularly preferable.
- pyridine, imidazole, aminopyridine, methylimidazole and the like are most preferable.
- pyridine As the nitrogen-containing heterocyclic compound, pyridine; aminopyridine such as 2-aminopyridine and 4-aminopyridine; imidazole; methylimidazole such as 2-methylimidazole; pyrazole; pteridine;
- the above pH buffering agents can be used alone or in combination of two or more.
- the concentration of the pH buffering agent in the sealing solution is not particularly limited and is preferably 0.1 to 100 g / L, more preferably 0.2 to 20 g / L.
- concentration of the pH buffering agent is within the above range, the sealing treatment liquid can exhibit excellent pH buffering properties, and the appearance of the treated product surface caused by the pH buffering agent being too high is poor. (Dry spots) and color stains in dyed products are suppressed.
- the surfactant is not particularly limited, and a conventionally known surfactant can be used.
- examples of such surfactants include anionic surfactants, nonionic surfactants, and amphoteric surfactants.
- anionic surfactant a sulfate surfactant, a sulfonate surfactant, a phosphorus surfactant, or the like can be used.
- sulfate-based surfactants examples include aromatic sulfate-based surfactants and aliphatic sulfate-based surfactants.
- aromatic sulfate surfactant examples include polyoxyethylene alkylphenyl ether sulfate.
- aliphatic sulfate surfactant examples include polyoxyethylene alkyl ether sulfate.
- sulfonate surfactant examples include aromatic sulfonate surfactants.
- aromatic sulfonate surfactant examples include aromatic sulfonate compounds such as benzene sulfonate and naphthalene sulfonate, and aromatic sulfonate skeletons such as benzene sulfonate and naphthalene sulfonate.
- aromatic sulfonate compounds such as benzene sulfonate and naphthalene sulfonate
- aromatic sulfonate skeletons such as benzene sulfonate and naphthalene sulfonate.
- aromatic sulfonate surfactants include alkylbenzene sulfonates, alkyl naphthalene sulfonates, and polycondensates thereof such as formalin, polycondensates such as formalin of naphthalene sulfonate, and alkylene benzene sulfonic acids. Examples thereof include a copolymer from a salt or an alkylene naphthalene sulfonate.
- aromatic sulfonate surfactant examples include compounds in which a plurality of phenyl sulfonates are ether-bonded, such as diphenyl ether disulfonate, and the compounds include an alkyl group, a polyoxyethylene group, and the like. And a compound substituted with a polyoxyethylene alkyl ether group or the like.
- aromatic sulfonate surfactants include alkyl diphenyl ether disulfonate and alkyl diphenyl ether disulfosuccinate.
- phosphate ester surfactants As the phosphorous surfactant, phosphate ester surfactants, phosphate ester salt surfactants, and the like can be used. Specific examples include polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyleneated phenyl ether phosphates, alkyl phosphates, and salts thereof.
- nonionic surfactant which can make a cloud point 85 degreeC or more in sealing processing liquid by adjustment of the density
- nonionic surfactants include polyoxyethylene alkyl ether, glycerin ester polyoxyethylene ether, sorbitan ester, and fatty acid alkanolamide.
- amphoteric surfactants include alkyl betaines, fatty acid amide betaines, and alkylamine oxides.
- an anionic surfactant is preferable.
- sulfate surfactants, sulfonate surfactants, and phosphorus surfactants are more preferable, and sulfonate surfactants are even more preferable.
- the above surfactants can be used alone or in combination of two or more. In addition, what is necessary is just to select the said nonionic surfactant so that the cloud point of a sealing process liquid may not become low. Moreover, when mixing and using a nonionic surfactant and an anionic surfactant, the cloud point of surfactant can be made high. When an anionic surfactant is used, a surfactant that does not cause turbidity by reacting with the contained metal or amphoteric surfactant may be selected.
- the concentration of the surfactant in the sealing treatment liquid is not particularly limited, preferably 10 mg / L to 10 g / L, and more preferably 20 mg / L to 5 g / L.
- concentration of the surfactant is in the above range, the sealing treatment liquid can exhibit sufficient sealing performance, and suppresses powder blowing and fogging appearance defects on the surface of the anodized film subjected to the sealing treatment. can do.
- the sealing treatment liquid of the present invention may further contain a pH adjuster. It does not specifically limit as a pH adjuster, A conventionally well-known pH adjuster can be used.
- Examples of the pH adjuster for adjusting the sealing treatment solution to the acidic side include dilute aqueous solutions such as acetic acid, sulfamic acid, sulfuric acid, nitric acid, and organic sulfonic acid. Among these, nitric acid is preferable in terms of excellent sealing performance.
- Examples of the pH adjuster for adjusting the sealing treatment liquid to the alkaline side include ammonia water, an aqueous sodium hydroxide solution, and an aqueous potassium hydroxide solution. Among these, a sodium hydroxide aqueous solution is preferable in terms of excellent sealing performance.
- the above pH adjusters can be used alone or in combination of two or more.
- the concentration of the pH adjuster in the sealing treatment liquid is not particularly limited, and is preferably 0 to 20 g / L, more preferably 0 to 10 g / L, and still more preferably 0 to 5 g / L.
- concentration of the pH adjusting agent is within the above range, the sealing treatment liquid can exhibit sufficient sealing performance, and suppresses a decrease in the sealing degree of the anodized film sealed with the sealing treatment liquid. can do.
- the sealing treatment liquid of the present invention may contain additive components such as a fungicide and a complexing agent as necessary in order to improve the sealing performance and the practical utility of the liquid.
- additive include antifungal agents such as benzoic acid and benzoate; complexing agents such as citric acid and citrate.
- fungicide a commercially available fungicide such as “TAC mold colon” (Okuno Pharmaceutical Co., Ltd.) may be added.
- the total content of the metal salt, pH buffer and surfactant in the sealing solution of the present invention is preferably 0.2 to 100 g / L, more preferably 0.3 to 50 g / L, and 0.5 More preferably, it is 30 g / L.
- the sealing treatment liquid can exhibit sufficient sealing performance, and the anodized film of the aluminum alloy sealed with the sealing treatment liquid is resistant to contamination.
- the pH of the sealing treatment solution is preferably 7.0 to 10.0, more preferably 7.2 to 9.5, and even more preferably 7.5 to 9.0.
- the sealing treatment liquid can exhibit sufficient sealing performance, and the anodized film of the aluminum alloy sealed with the sealing treatment liquid has sufficient resistance to contamination.
- appearance defects prowder blowing, fogging in which powdery deposits adhere to the surface of the object to be processed are suppressed.
- the sealing treatment liquid of the present invention is not particularly limited as long as it contains a metal salt, a pH buffering agent and a surfactant, but is preferably an aqueous solution containing the above-described components.
- the sealing treatment liquid of the present invention does not contain a metal salt such as a nickel-based metal salt.
- the metal salt include metal salts such as Ni, Co, Fe, and Cr.
- the concentrated liquid of the present invention is a concentrated liquid of a sealing solution for anodized film of an aluminum alloy containing a metal salt, a pH buffer and a surfactant, and the metal salt includes an alkali metal salt and an alkali It is at least one selected from earth metal salts.
- the same ones as those contained in the sealing treatment liquid can be used.
- the concentrated liquid of the present invention contains the same components as the sealing treatment liquid, but the content of the components is different.
- the total content of the metal salt, pH buffer and surfactant in the concentrate is preferably 1 to 800 g / L, more preferably 1.5 to 400 g / L, still more preferably 2.5 to 250 g / L. .
- the sealing treatment liquid can be easily prepared.
- the total content of the metal salt, the pH buffering agent and the surfactant in the concentrated solution may be in a range exceeding 100 g / L in terms of distinction between the sealing treatment solution and the concentrated solution, It may be 150 g / L or more.
- the sealing method of the present invention is a method for sealing an anodized film of an aluminum alloy, and has an anodized film of an aluminum alloy in a sealing solution for an anodized film of an aluminum alloy.
- the sealing treatment liquid As the sealing treatment liquid, the sealing treatment liquid described above can be used.
- the sealing treatment method of the present invention includes a step of immersing an article having an anodized film of an aluminum alloy in the sealing treatment solution. It does not specifically limit as a dipping method, What is necessary is just to immerse by a conventionally well-known method.
- the temperature of the sealing treatment liquid in the above step is preferably 85 to 100 ° C, more preferably 88 to 98 ° C, and still more preferably 90 to 98 ° C. By setting the temperature of the sealing treatment liquid within the above range, sufficient sealing performance can be exhibited.
- the pH of the sealing treatment solution is preferably 7.0 to 10.0, more preferably 7.2 to 9.5, and even more preferably 7.5 to 9.0.
- the sealing treatment liquid can exhibit sufficient sealing performance, and appearance defects (powder spraying, fogging) in which powdery deposits adhere to the surface of the workpiece are suppressed. .
- Sealing treatment time can usually be determined by the film thickness of the anodized film to be treated. Specifically, the number obtained by multiplying the number indicating the film thickness ( ⁇ m) by 0.1 to 10 is preferably the sealing treatment time (minutes), and the number indicating the film thickness ( ⁇ m) More preferably, the number obtained by multiplying 0.2 to 5 is taken as the sealing treatment time (minutes), and the number obtained by multiplying the number ( ⁇ m) indicating the film thickness by 0.5 to 4 is sealed. More preferably, the processing time (minutes) is used. For example, if the thickness of the anodized film is 10 ⁇ m, the immersion time is more preferably about 2 to 50 minutes by multiplying 10 by 0.2 to 5.
- the sealing treatment liquid can exhibit sufficient sealing performance, and the anodized film of the aluminum alloy sealed with the sealing treatment liquid has sufficient contamination resistance. Moreover, the fall of the external appearance of a to-be-processed object by external appearance defects, such as powder blowing and fog, can be suppressed.
- an article having an anodized film of an aluminum alloy may be immersed while stirring the sealing treatment solution.
- circulation stirring, air stirring, gas stirring and rocking stirring are suitable. Among these, circulating stirring and gas stirring are preferable, and circulating stirring is more preferable.
- gas stirring gas stirring using an inert gas such as nitrogen gas or argon gas is suitable.
- the sealing treatment liquid absorbs carbon dioxide in the air. However, it may cause turbidity. For this reason, as described above, circulating stirring is preferable as described above. However, if it is necessary to perform air stirring on the equipment, performing gas stirring using the above inert gas may reduce the turbidity of the sealing treatment liquid. It is preferable in that it can be suppressed.
- the sealing treatment method of the present invention removes turbidity in the sealing treatment liquid during the step of immersing the article having the anodizing film of aluminum alloy in the sealing treatment liquid for anodized film of aluminum alloy described above.
- By performing the turbidity removal treatment it is possible to suppress a decrease in the appearance of the anodized film due to poor appearance such as powder blowing and fog caused by turbidity.
- the turbidity removal method is not particularly limited, and a conventionally known removal method can be used.
- the removal method include filtration removal. Specifically, a part of the sealing treatment liquid is allowed to flow from a tank for performing the sealing treatment to a reserve tank such as a cushion tank that is a chemical replenishment addition dissolution tank, and the temperature of the sealing treatment liquid is preferably 50 ° C. or less.
- the filtration removal include cooling, filtering through a filter, and returning to the tank where the sealing treatment is performed. If the equipment does not have a cushion tank, filtration may be removed by simple filtration circulation.
- the object to be treated is an anodized film of an aluminum alloy.
- the anodized film of the aluminum alloy is not particularly limited as long as it is an anodized film of an aluminum alloy obtained by applying a known anodizing method using sulfuric acid, oxalic acid or the like to a general aluminum alloy.
- the aluminum alloy is not particularly limited, and various aluminum-based alloys can be an object of anodization. Specific examples of aluminum alloys include JIS-A, JIS-A, wrought steel alloys shown in the 1000s to 7000s, casting materials shown in the AC and ADC steps, die casting materials, etc. Examples include various alloy groups mainly composed of aluminum.
- the anodic oxidation method to be applied to the aluminum alloy for example, using aqueous sulfuric acid concentration of about 100g / L ⁇ 400g / L, the liquid temperature is set to about -10 ⁇ 30 °C, 0.5 ⁇ 4A / dm 2 about And a method of performing electrolysis at an anode current density of 1 to 5.
- an aluminum alloy anodized film subjected to electrolytic coloring may be treated.
- the electrolytic coloring method a known coloring technique can be employed. For example, after anodizing, the anodized film can be colored by dipping in an electrolytic coloring bath and performing secondary electrolysis.
- the electrolytic coloring bath include a nickel salt-boric acid bath and a nickel salt-tin salt-sulfuric acid bath.
- an anodized film of an aluminum alloy that has been dyed with a dye may be treated.
- Examples of the dyeing method using a dye include a method of immersing an anodized film in a conventionally known dye aqueous solution.
- a dye those commercially available as a dye for an aluminum alloy anodized film can be used, and examples thereof include an anionic dye.
- the temperature of the aqueous dye solution is preferably 10 to 70 ° C, more preferably 20 to 60 ° C. Further, the concentration of the dye in the dye aqueous solution and the immersion time may be appropriately set according to the desired color tone and color density.
- a dye fixing treatment is performed after dyeing and before the sealing treatment. May be.
- the dye fixing treatment agent used for the dye fixing treatment are those commercially available for an aluminum alloy anodic oxide film dyeing process (for example, TAC Adhesive-2, TAC Sun Block 77-5C manufactured by Okuno Pharmaceutical Co., Ltd.) ) Can be used.
- dye fixing property can be imparted to the sealing treatment liquid by adjusting the types and blends of the pH buffering agent and the surfactant in the sealing treatment liquid.
- the article having the above-described aluminum alloy anodized film may be used as the article to be treated, and the article to be treated may be immersed in the aforementioned sealing treatment liquid.
- an article having an anodized film of an aluminum alloy may be subjected to electrolytic coloring, dyeing, etc., and then sufficiently washed with water, and the object to be treated may be immersed in the sealing treatment liquid described above. .
- the sealing performance of the anodic oxide film of the aluminum alloy of a to-be-processed object can be improved greatly.
- anodized aluminum alloy test pieces used in the following examples and comparative examples were prepared.
- anodized test piece A (without dyeing and dye-fixing treatment) An aluminum test piece (JIS A1050P plate material) was prepared with a weak alkaline degreasing solution (Okuno Pharmaceutical Co., Ltd. Top Alclean 101 (trade name) 30 g / Degreased by dipping in an aqueous solution of L, bath temperature: 60 ° C. for 3 minutes. Next, it is washed with water and anodized in an anodizing bath containing sulfuric acid as a main component (including free sulfuric acid 180 g / L and dissolved aluminum 8.0 g / L) (bath temperature: 20 ⁇ 1 ° C., anode current density: 1 A / dm). 2 and electrolysis time: 30 minutes, film thickness: about 10 ⁇ m). The obtained anodized film was washed with water to obtain an anodized aluminum alloy test piece (hereinafter referred to as “anodized test piece A”).
- anodized test piece A an ano
- anodized test piece B (with dyeing treatment and dye-fixing treatment)
- An aluminum test piece (JIS A1050P plate material) was prepared with a weak alkaline degreasing solution (Okuno Pharmaceutical Co., Ltd. Top Alclean 101 (trade name) 30 g / Degreased by dipping in an aqueous solution of L, bath temperature: 60 ° C. for 3 minutes.
- Top Alclean 101 (trade name) 30 g / Degreased by dipping in an aqueous solution of L, bath temperature: 60 ° C. for 3 minutes.
- it is washed with water and anodized in an anodizing bath containing sulfuric acid as a main component (including free sulfuric acid 180 g / L and dissolved aluminum 8.0 g / L) (bath temperature: 20 ⁇ 1 ° C., anode current density: 1 A / dm).
- anodized aluminum alloy test piece (hereinafter referred to as “anodized test piece B”) was obtained.
- anodized film was washed with water and immersed in an acid activation bath (bath temperature: room temperature) containing 98% sulfuric acid 100 mL / L for 1 minute for acid activation, followed by washing with water.
- an acid activation bath bath temperature: room temperature
- a dyeing solution TAC dye TAC black 402 1 g / L, manufactured by Okuno Pharmaceutical Co., Ltd.
- An aluminum alloy test piece (hereinafter referred to as “anodized test piece C”) was obtained.
- Example 1 Anodized test piece A manufactured according to the above manufacturing conditions was prepared by using sodium acetate 1 g / L as a metal salt, ammonium acetate 1 g / L as a pH buffering agent, and sodium naphthalenesulfonate formalin polycondensate 0.5 g / L as a surfactant.
- a sealing treatment solution bath temperature: 92 ° C.
- the sealing treatment was performed by dipping for 10 minutes and 20 minutes.
- Example 2 Sealing treatment was performed in the same manner as in Example 1 except that the anodized test piece B was used.
- Example 3 Magnesium acetate 5g / L as metal salt, 0.5g / L triethanolamine as pH buffer, 0.2g / L sodium dodecylbenzenesulfonate as surfactant, pH adjusted with acetic acid and sodium hydroxide Sealing treatment was performed in the same manner as in Example 1 except that the sealing treatment liquid which was an aqueous solution was used.
- Example 4 An aqueous solution containing 5 g / L of calcium nitrate as a metal salt, 4 g / L of alanine as a pH buffering agent, 0.2 g / L of sodium alkylenephenylsulfonate copolymer as a surfactant, and adjusting the pH with nitric acid and aqueous ammonia. Sealing treatment was performed in the same manner as in Example 1 except that a certain sealing treatment liquid was used.
- Example 5 An aqueous solution containing 10 g / L magnesium nitrate as a metal salt, 4 g / L pyridine as a pH buffering agent, 0.5 g / L sodium naphthalenesulfonate formalin polycondensate as a surfactant, and adjusting the pH with nitric acid and potassium hydroxide.
- the sealing treatment was performed in the same manner as in Example 1 except that the sealing treatment liquid was used.
- Example 6 Using anodized test piece B, containing 10 g / L of magnesium nitrate as metal salt, 4 g / L of pyridine as pH buffering agent, 0.5 g / L of sodium naphthalene sulfonate formalin polycondensate, and using nitric acid and potassium hydroxide Sealing treatment was performed in the same manner as in Example 1 except that the sealing treatment liquid, which was an aqueous solution with adjusted pH, was used.
- the sealing treatment liquid which was an aqueous solution with adjusted pH
- Example 7 Anodized test piece A produced according to the above production conditions was prepared by using 10 g / L of potassium nitrate as a metal salt, 0.5 g / L of 2-aminopyridine and 0.5 g / L of 2-methylimidazole as a pH buffering agent, and a surfactant.
- Sealing treatment liquid bath temperature: 92
- Sealing treatment liquid containing 0.2 g / L of polyoxyethylene styrenated phenyl ether phosphate ester, adjusted to pH 7.5 and 9.5 with nitric acid and aqueous ammonia, respectively. (° C.), each of the pH was immersed for 5 minutes and for 20 minutes, respectively, for sealing treatment.
- Example 8 20 g / L magnesium nitrate as metal salt, 0.5 g / L 2-aminopyridine and 0.5 g / L 2-methylimidazole as pH buffering agent, 0.2 g polyoxyethylene styrenated phenyl ether phosphate as surfactant Sealing treatment was carried out in the same manner as in Example 7 except that a sealing treatment solution containing / L and adjusting the pH with nitric acid and aqueous ammonia was used.
- Example 9 Using anodized test piece B, 1 g / L of barium nitrate as metal salt, 1 g / L of pyrazole as pH buffer and 1 g / L of pteridine, 1 g / L of fatty acid amide alkylbetaine as surfactant and sodium alkylene phenylsulfonate Sealing treatment was performed in the same manner as in Example 7 except that a sealing treatment solution containing 0.2 g / L of a polymer and adjusting the pH with nitric acid and aqueous ammonia was used.
- Example 10 Using anodized test piece A, magnesium nitrate 20 g / L as a metal salt, imidazole 2 g / L as a pH buffer, 0.1 g / L sodium polyoxyethylene alkyl ether sulfate as a surfactant and polyoxyethylene phenyl ether sulfate Sealing treatment was performed in the same manner as in Example 7 except that a sealing treatment solution containing 0.2 g / L of sodium and adjusting the pH with nitric acid and aqueous ammonia was used.
- Example 11 Using anodized test piece A, magnesium nitrate 20 g / L as a metal salt, imidazole 2 g / L as a pH buffering agent, 0.01 g / L of polyoxyethylene alkyl ether as a surfactant, and sodium alkylenephenylsulfonate copolymer Sealing treatment was performed in the same manner as in Example 7 except that a sealing treatment solution containing 0.2 g / L and having an aqueous solution adjusted in pH with nitric acid and aqueous ammonia was used.
- Example 12 Using anodized test piece B, calcium nitrate 5 g / L as metal salt, oxazole 1 g / L as pH buffer, fatty acid amide alkylbetaine 0.2 g / L as surfactant and sodium dodecylbenzenesulfonate 0.5 g / L Sealing treatment was performed in the same manner as in Example 7 except that a sealing treatment solution containing L and an aqueous solution whose pH was adjusted with nitric acid and aqueous ammonia was used.
- Comparative Example 3 Sealing treatment was performed in the same manner as in Comparative Example 2 except that the anodized test piece C was used.
- anodized test pieces were sealed in the above examples and comparative examples, they were washed with running water for 1 minute. Next, the anodized test piece was dried with a dryer and then left overnight in a room temperature environment to prepare an anodized test piece after sealing treatment.
- test pieces after the sealing treatment prepared in the above examples and comparative examples were evaluated by the following test methods.
- Fuanado JIS H 8683-2: 1999 Alignment and sealing quality test methods Part 2 of anodic oxide coatings on aluminum alloys: phosphoric acid - chromic acid solution immersion test) in compliance with each test after sealing treatment
- the piece was immersed in a phosphoric acid-chromic acid aqueous solution, and the weight loss of the test piece per unit area was measured. The smaller the numerical value, the better the sealing degree.
- Contamination resistance magic test-adhesion dirt removal test
- Each test piece after the sealing treatment was allowed to stand at room temperature for 1 day, marked with oily black magic ink on the surface, and allowed to stand for 30 seconds. Subsequently, it wiped off with the box tissue soaked with water or isopropyl alcohol, and evaluated according to the following evaluation criteria.
- Example 13 Anodized specimen A containing 10 g / L of magnesium nitrate as a metal salt, 4 g / L of pyridine as a pH buffering agent, 0.5 g / L of sodium naphthalene sulfonate formalin polycondensate as a surfactant, nitric acid and water
- the sealing treatment was performed by immersing in 1 L of a sealing treatment liquid (bath temperature: 92 ° C.) which is an aqueous solution adjusted to pH 9.0 with potassium oxide.
- a sealing treatment liquid bath temperature: 92 ° C.
- 20 test pieces were sequentially immersed for 20 minutes each while stirring the argon gas into the sealing treatment solution.
- the test piece had a size of 5 cm ⁇ 10 cm and an area of 1 dm 2 in total on both sides.
- Example 14 Sealing treatment was performed in the same manner as in Example 13 except that air stirring was performed instead of argon gas stirring.
- Example 14 the sealing bath became dark and cloudy due to air stirring, but in Example 13 where argon gas stirring was performed, the sealing bath was only slightly cloudy. Further, the white turbidity of Examples 13 and 14 could be removed by filtration.
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Abstract
Description
1.金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液であって、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、ことを特徴とする封孔処理液。
2.前記金属塩は、Na、Mg、K及びCaからなる群より選択される少なくとも1種の金属の金属塩である、項1に記載の封孔処理液。
3.前記金属塩は、Mg及びCaからなる群より選択される少なくとも1種の金属の金属塩である、項1に記載の封孔処理液。
4.前記金属塩は、酢酸塩、スルファミン酸塩、硫酸塩及び硝酸塩からなる群より選択される少なくとも1種である、項1~3のいずれかに記載の封孔処理液。
5.前記金属塩は、硝酸塩である、項1~3のいずれかに記載の封孔処理液。
6.前記pH緩衝剤は、有機酸塩、アンモニウム塩、アミノ酸、ホウ酸塩、アミン化合物及び含窒素複素環式化合物からなる群より選択される少なくとも1種である、項1~5のいずれかに記載の封孔処理液。
7.前記pH緩衝剤は、含窒素複素環式化合物である、項1~5のいずれかに記載の封孔処理液。
8.前記界面活性剤は、アニオン系界面活性剤及び両性界面活性剤からなる群より選択される少なくとも1種である、項1~7のいずれかに記載の封孔処理液。
9.前記界面活性剤は、硫酸塩系界面活性剤、スルホン酸塩系界面活性剤及びリン酸エステル系界面活性剤からなる群より選択される少なくとも1種である、項1~7のいずれかに記載の封孔処理液。
10.pHが7.0~10.0である、項1~9のいずれかに記載の封孔処理液。
11.ニッケル系金属塩を含まない、項1~10のいずれかに記載の封孔処理液。
12.前記封孔処理液中の前記金属塩、前記pH緩衝剤及び前記界面活性剤の含有量の合計は、0.2~100g/Lである、項1~11のいずれかに記載の封孔処理液。
13.金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液の濃縮液であって、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、ことを特徴とする濃縮液。
14.アルミニウム合金の陽極酸化皮膜の封孔処理方法であって、
アルミニウム合金の陽極酸化皮膜用封孔処理液中に、アルミニウム合金の陽極酸化皮膜を有する物品を浸漬する工程を有し、
前記封孔処理液は、金属塩、pH緩衝剤及び界面活性剤を含有し、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、
ことを特徴とする封孔処理方法。
15.前記封孔処理液の液温が85~100℃である項14に記載の封孔処理方法。
16.前記封孔処理液のpHが7.0~10.0である、項14又は15に記載の封孔処理方法。
17.項14~16のいずれかに記載の封孔処理方法により封孔処理された物品。
本発明の封孔処理液は、金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液であって、上記金属塩は、アルカリ金属塩及びアルカリ土類金属塩より選択される少なくとも1種である。
本発明の封孔処理液が含有する金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である。上記アルカリ金属塩、アルカリ土類金属塩としては特に限定されないが、水溶性のものが好ましく、カルボン酸塩、スルファミン酸塩、硫酸塩、硝酸塩、有機スルホン酸塩等が挙げられる。これらの中でも、封孔処理されたアルミニウム合金の陽極酸化皮膜が耐汚染性に優れる点で、カルボン酸塩、スルファミン酸塩、硫酸塩、硝酸塩が好ましく、酢酸塩、スルファミン酸塩、硫酸塩、硝酸塩がより好ましく、酢酸塩、硝酸塩が更に好ましく、硝酸塩が特に好ましい。上記金属塩は、一種単独で又は二種以上を混合して用いることができる。
pH緩衝剤としては特に限定されず、従来公知のpH緩衝剤を用いることができる。このようなpH緩衝剤としては、例えば、有機酸塩、アンモニウム塩、アミノ酸、ホウ酸塩、アミン化合物、含窒素複素環式化合物等が挙げられる。これらの中でも、封孔処理液により封孔処理されたアルミニウム合金の陽極酸化皮膜に優れた耐汚染性を付与することができる点で、含窒素複素環式化合物が好ましい。
界面活性剤としては特に限定されず、従来公知の界面活性剤を用いることができる。このような界面活性剤としては、アニオン系界面活性剤、ノニオン系界面活性剤、両性界面活性剤が挙げられる。
本発明の封孔処理液は、更に、pH調整剤を含んでいてもよい。pH調整剤としては特に限定されず、従来公知のpH調整剤を用いることができる。
本発明の封孔処理液は、封孔性能や液の使用実用性を向上させるために、必要に応じて防カビ剤、錯化剤等の添加剤成分を含んでいてもよい。添加剤としては、例えば、安息香酸、安息香酸塩等の防カビ剤;クエン酸、クエン酸塩等の錯化剤等が挙げられる。また、防カビ剤としては市販の防カビ剤、例えば「TACカビコロン」(奥野製薬工業株式会社製)を添加してもよい。
本発明の封孔処理液中の金属塩、pH緩衝剤及び界面活性剤の含有量の合計は、0.2~100g/Lが好ましく、0.3~50g/Lがより好ましく、0.5~30g/Lが更に好ましい。上記含有量の合計が上述の範囲であることにより、封孔処理液が十分な封孔性能を示すことができ、封孔処理液により封孔処理されたアルミニウム合金の陽極酸化皮膜が耐汚染性を十分に示すことができ、且つ、封孔処理された陽極酸化皮膜の表面の粉吹きやカブリ外観不良を抑制することができる。
本発明の濃縮液は、金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液の濃縮液であって、上記金属塩は、アルカリ金属塩及びアルカリ土類金属塩より選択される少なくとも1種である。上記封孔処理液に含まれる成分の濃度が高い濃縮液とすることにより、運搬、保存が容易になり、水等の希釈液で希釈することにより、上記封孔処理液を容易に調製することができる。上記希釈液としては、水が好ましい。
本発明の封孔処理方法は、アルミニウム合金の陽極酸化皮膜の封孔処理方法であって、アルミニウム合金の陽極酸化皮膜用封孔処理液中に、アルミニウム合金の陽極酸化皮膜を有する物品を浸漬する工程を有し、上記封孔処理液は、金属塩、pH緩衝剤及び界面活性剤を含有し、上記金属塩は、アルカリ金属塩及びアルカリ土類金属塩より選択される少なくとも1種である封孔処理方法である。
アルミニウムの試験片(JIS A1050P板材)を弱アルカリ性脱脂液(奥野製薬工業(株)製 トップアルクリーン101(商品名)の30g/L水溶液、浴温:60℃)に3分間浸漬して脱脂した。次いで、水洗し、硫酸を主成分とする陽極酸化浴(遊離硫酸180g/L及び溶存アルミ8.0g/Lを含む)で陽極酸化(浴温:20±1℃、陽極電流密度:1A/dm2、電解時間:30分間、膜厚:約10μm)を行った。得られた陽極酸化皮膜を水洗し、陽極酸化を施したアルミニウム合金試験片(以下、「陽極酸化済試験片A」という)を得た。
アルミニウムの試験片(JIS A1050P板材)を弱アルカリ性脱脂液(奥野製薬工業(株)製 トップアルクリーン101(商品名)の30g/L水溶液、浴温:60℃)に3分間浸漬して脱脂した。次いで、水洗し、硫酸を主成分とする陽極酸化浴(遊離硫酸180g/L及び溶存アルミ8.0g/Lを含む)で陽極酸化(浴温:20±1℃、陽極電流密度:1A/dm2、電解時間:30分間、膜厚:約10μm)を行った。得られた陽極酸化皮膜を水洗し、98%硫酸100mL/Lを含む酸活性浴(浴温:室温)に1分間浸漬して酸活性し、水洗を行った。次いで、染色処理液(奥野製薬工業(株)製 TAC染料 TACブラック402 1g/L)に50℃で1分浸漬し、水洗して染色処理を行った。次いで、染色定着処理液(奥野製薬工業(株)製 TAC固着剤-2(商品名)20mL/L)に室温で3分浸漬し、水洗を行うことにより染色定着処理を施し、染色処理された、陽極酸化を施したアルミニウム合金試験片(以下、「陽極酸化済試験片B」という)を得た。
アルミニウムの試験片(JIS A1050P板材)を弱アルカリ性脱脂液(奥野製薬工業(株)製 トップアルクリーン101(商品名)の30g/L水溶液、浴温:60℃)に3分間浸漬して脱脂した。次いで、水洗し、硫酸を主成分とする陽極酸化浴(遊離硫酸180g/L及び溶存アルミ8.0g/Lを含む)で陽極酸化(浴温:20±1℃、陽極電流密度:1A/dm2、電解時間:30分間、膜厚:約10μm)を行った。得られた陽極酸化皮膜を水洗し、98%硫酸100mL/Lを含む酸活性浴(浴温:室温)に1分間浸漬して酸活性し、水洗を行った。次いで、染色処理液(奥野製薬工業(株)製 TAC染料 TACブラック402 1g/L)に50℃で1分浸漬し、水洗を行うことにより染色処理を施し、染色処理された、陽極酸化を施したアルミニウム合金試験片(以下、「陽極酸化済試験片C」という)を得た。
上記製造条件に従って製造した陽極酸化済試験片Aを、金属塩として酢酸ナトリウム1g/L、pH緩衝剤として酢酸アンモニウム1g/L、界面活性剤としてナフタレンスルホン酸ナトリウムホルマリン重縮合物0.5g/Lを含有し、硝酸とアンモニア水でpHを7.0、8.0、9.0のそれぞれに調整した水溶液である封孔処理液(浴温:92℃)に、各pH毎にそれぞれ5分間、10分間、20分間の各浸漬時間で浸漬して封孔処理を行った。
陽極酸化済試験片Bを用いた以外は実施例1と同様にして、封孔処理を行った。
金属塩として酢酸マグネシウム5g/L、pH緩衝剤としてトリエタノールアミン0.5g/L、界面活性剤としてドデシルベンゼンスルホン酸ナトリウム0.2g/Lを含有し、酢酸と水酸化ナトリウムでpHを調整した水溶液である封孔処理液を用いた以外は実施例1と同様にして、封孔処理を行った。
金属塩として硝酸カルシウム5g/L、pH緩衝剤としてアラニン4g/L、界面活性剤としてアルキレンフェニルスルホン酸ナトリウム共重合物0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例1と同様にして、封孔処理を行った。
金属塩として硝酸マグネシウム10g/L、pH緩衝剤としてピリジン4g/L、界面活性剤としてナフタレンスルホン酸ナトリウムホルマリン重縮合物0.5g/Lを含有し、硝酸と水酸化カリウムでpHを調整した水溶液である封孔処理液を用いた以外は実施例1と同様にして、封孔処理を行った。
陽極酸化済試験片Bを用い、金属塩として硝酸マグネシウム10g/L、pH緩衝剤としてピリジン4g/L、ナフタレンスルホン酸ナトリウムホルマリン重縮合物0.5g/Lを含有し、硝酸と水酸化カリウムでpHを調整した水溶液である封孔処理液を用いた以外は実施例1と同様にして、封孔処理を行った。
上記製造条件に従って製造した陽極酸化済試験片Aを、金属塩として硝酸カリウム10g/L、pH緩衝剤として2-アミノピリジン0.5g/L及び2-メチルイミダゾール0.5g/L、界面活性剤としてポリオキシエチレンスチレン化フェニルエーテルリン酸エステル0.2g/Lを含有し、硝酸とアンモニア水でpHを7.5、9.5のそれぞれに調整した水溶液である封孔処理液(浴温:92℃)に、各pH毎にそれぞれ5分間、20分間の各浸漬時間で浸漬して封孔処理を行った。
金属塩として硝酸マグネシウム20g/L、pH緩衝剤として2-アミノピリジン0.5g/L及び2-メチルイミダゾール0.5g/L、界面活性剤としてポリオキシエチレンスチレン化フェニルエーテルリン酸エステル0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
陽極酸化済試験片Bを用い、金属塩として硝酸バリウム1g/L、pH緩衝剤としてピラゾール1g/L及びプテリジン1g/L、界面活性剤として脂肪酸アミドアルキルベタイン1g/L及びアルキレンフェニルスルホン酸ナトリウム共重合物0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
陽極酸化済試験片Aを用い、金属塩として硝酸マグネシウム20g/L、pH緩衝剤としてイミダゾール2g/L、界面活性剤としてポリオキシエチレンアルキルエーテル硫酸ナトリウム0.1g/L及びポリオキシエチレンフェニルエーテル硫酸ナトリウム0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
(実施例11)
陽極酸化済試験片Aを用い、金属塩として硝酸マグネシウム20g/L、pH緩衝剤としてイミダゾール2g/L、界面活性剤としてポリオキシエチレンアルキルエーテル0.01g/L及びアルキレンフェニルスルホン酸ナトリウム共重合物0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
陽極酸化済試験片Bを用い、金属塩として硝酸カルシウム5g/L、pH緩衝剤としてオキサゾール1g/L、界面活性剤として脂肪酸アミドアルキルベタイン0.2g/L及びドデシルベンゼンスルホン酸ナトリウム0.5g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
陽極酸化済試験片Aを、沸騰水封孔(イオン交換水)に92℃で20分浸漬して封孔処理を行った。
陽極酸化済試験片Aを、酢酸ニッケル系封孔剤(奥野製薬工業(株)製 トップシールH-298(商品名))を40mL/L含むpH5.6の水溶液からなる封孔処理液(浴温:92℃)に、5分間、10分間、20分間の各浸漬時間で浸漬して封孔処理を行った。
陽極酸化済試験片Cを用いた以外は比較例2と同様にして、封孔処理を行った。
硫酸アンモニウム10g/L、pH緩衝剤として2-アミノピリジン0.5g/L及び2-メチルイミダゾール0.5g/L、界面活性剤としてポリオキシエチレンスチレン化フェニルエーテルリン酸エステル0.2g/Lを含有し、硝酸とアンモニア水でpHを調整した水溶液である封孔処理液を用いた以外は実施例7と同様にして、封孔処理を行った。
JIS H 8683-2:1999(アルミニウム及びアルミニウム合金の陽極酸化皮膜の封孔度試験方法 第2部:リン酸-クロム酸水溶液浸漬試験)に準拠して、封孔処理後の各試験片をリン酸-クロム酸水溶液に浸漬し、単位面積あたりの試験片の質量減少を測定した。数値が小さいほど、封孔度が良いことを示す。
封孔処理後の各試験片を室温にて1日放置し、表面に油性黒マジックインクにてマークを記入し、30秒静置した。次いで、水又はイソプロピルアルコールを染み込ませたボックスティシューにより拭き取りを行い、下記評価基準に従って評価した。
◎:軽く擦ると完全にマークを除去できる
○:強く擦るとマークを除去できる
△:強く擦っても若干マーク跡が残る
×:マークの黒色が取れない
なお、水を用いた試験により、△評価であれば実使用において問題ないと評価できる。
封孔処理を行った陽極酸化済試験片の表面の粉吹き、カブリ、又はそれらによる干渉膜虹の発生状態を目視で観察し、下記評価基準に従って評価した。
◎:粉吹き、カブリ、又はそれらによる干渉膜虹が全く発生しておらず、外観が良好である
○:粉吹き、カブリ、又はそれらによる干渉膜虹が若干発生しているが、外観に問題がない程度である
△:粉吹き、カブリ、又はそれらによる干渉膜虹が発生しており、軽度の外観不良が生じている
×:粉吹き、カブリ、又はそれらによる干渉膜虹が強く発生しており、重度の外観不良が生じている
陽極酸化済試験片Aを、金属塩として硝酸マグネシウム10g/L、pH緩衝剤としてピリジン4g/L、界面活性剤としてナフタレンスルホン酸ナトリウムホルマリン重縮合物0.5g/Lを含有し、硝酸と水酸化カリウムでpHを9.0に調整した水溶液である封孔処理液(浴温:92℃)1Lに浸漬して封孔処理を行った。具体的には、上記封孔処理液に対してアルゴンガス撹拌を行いながら、20枚の試験片をそれぞれ20分間ずつ順次浸漬した。試験片は、大きさが5cm×10cmであり、面積が両面の合計で1dm2であった。
アルゴンガス撹拌に代えて、空気攪拌を行った以外は実施例13と同様にして、封孔処理を行った。
Claims (17)
- 金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液であって、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、ことを特徴とする封孔処理液。 - 前記金属塩は、Na、Mg、K及びCaからなる群より選択される少なくとも1種の金属の金属塩である、請求項1に記載の封孔処理液。
- 前記金属塩は、Mg及びCaからなる群より選択される少なくとも1種の金属の金属塩である、請求項1に記載の封孔処理液。
- 前記金属塩は、酢酸塩、スルファミン酸塩、硫酸塩及び硝酸塩からなる群より選択される少なくとも1種である、請求項1~3のいずれかに記載の封孔処理液。
- 前記金属塩は、硝酸塩である、請求項1~3のいずれかに記載の封孔処理液。
- 前記pH緩衝剤は、有機酸塩、アンモニウム塩、アミノ酸、ホウ酸塩、アミン化合物及び含窒素複素環式化合物からなる群より選択される少なくとも1種である、請求項1~5のいずれかに記載の封孔処理液。
- 前記pH緩衝剤は、含窒素複素環式化合物である、請求項1~5のいずれかに記載の封孔処理液。
- 前記界面活性剤は、アニオン系界面活性剤及び両性界面活性剤からなる群より選択される少なくとも1種である、請求項1~7のいずれかに記載の封孔処理液。
- 前記界面活性剤は、硫酸塩系界面活性剤、スルホン酸塩系界面活性剤及びリン酸エステル系界面活性剤からなる群より選択される少なくとも1種である、請求項1~7のいずれかに記載の封孔処理液。
- pHが7.0~10.0である、請求項1~9のいずれかに記載の封孔処理液。
- ニッケル系金属塩を含まない、請求項1~10のいずれかに記載の封孔処理液。
- 前記封孔処理液中の前記金属塩、前記pH緩衝剤及び前記界面活性剤の含有量の合計は、0.2~100g/Lである、請求項1~11のいずれかに記載の封孔処理液。
- 金属塩、pH緩衝剤及び界面活性剤を含有するアルミニウム合金の陽極酸化皮膜用封孔処理液の濃縮液であって、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、ことを特徴とする濃縮液。 - アルミニウム合金の陽極酸化皮膜の封孔処理方法であって、
アルミニウム合金の陽極酸化皮膜用封孔処理液中に、アルミニウム合金の陽極酸化皮膜を有する物品を浸漬する工程を有し、
前記封孔処理液は、金属塩、pH緩衝剤及び界面活性剤を含有し、
前記金属塩は、アルカリ金属塩及びアルカリ土類金属塩からなる群より選択される少なくとも1種である、
ことを特徴とする封孔処理方法。 - 前記封孔処理液の液温が85~100℃である請求項14に記載の封孔処理方法。
- 前記封孔処理液のpHが7.0~10.0である、請求項14又は15に記載の封孔処理方法。
- 請求項14~16のいずれかに記載の封孔処理方法により封孔処理された物品。
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CN114729459A (zh) * | 2019-11-21 | 2022-07-08 | 奥野制药工业株式会社 | 化学研磨剂和化学研磨方法 |
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US20210363654A1 (en) * | 2018-06-22 | 2021-11-25 | Hewlett-Packard Development Company, L.P. | Nickel-free sealing of anodized metal substrates |
CN109972185A (zh) * | 2019-04-17 | 2019-07-05 | 邓华斌 | 一种铝合金无镍环保封孔剂及其制备方法 |
CN110528043B (zh) * | 2019-09-17 | 2021-05-07 | 蓝思精密(东莞)有限公司 | 金属板材的防汗液处理工艺及金属板材、金属壳体和电子设备 |
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