WO2015045855A1 - アルミニウム缶の表面処理方法 - Google Patents
アルミニウム缶の表面処理方法 Download PDFInfo
- Publication number
- WO2015045855A1 WO2015045855A1 PCT/JP2014/073834 JP2014073834W WO2015045855A1 WO 2015045855 A1 WO2015045855 A1 WO 2015045855A1 JP 2014073834 W JP2014073834 W JP 2014073834W WO 2015045855 A1 WO2015045855 A1 WO 2015045855A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aluminum
- acid
- treatment
- alkali
- treatment step
- Prior art date
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 163
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010306 acid treatment Methods 0.000 claims abstract description 119
- 239000003513 alkali Substances 0.000 claims abstract description 112
- 238000005530 etching Methods 0.000 claims abstract description 48
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 6
- 229910001415 sodium ion Inorganic materials 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 79
- 238000004381 surface treatment Methods 0.000 claims description 26
- 239000004094 surface-active agent Substances 0.000 claims description 21
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- -1 ammonium ions Chemical class 0.000 claims description 16
- 239000002738 chelating agent Substances 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 150000007524 organic acids Chemical class 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 abstract description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 32
- 239000000126 substance Substances 0.000 description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 10
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 10
- 229910001447 ferric ion Inorganic materials 0.000 description 10
- 229910021645 metal ion Inorganic materials 0.000 description 10
- 150000007522 mineralic acids Chemical class 0.000 description 8
- 239000002736 nonionic surfactant Substances 0.000 description 7
- 235000011121 sodium hydroxide Nutrition 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 238000011109 contamination Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000005238 degreasing Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 235000015165 citric acid Nutrition 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000005985 organic acids Nutrition 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000002087 whitening effect Effects 0.000 description 4
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000174 gluconic acid Substances 0.000 description 3
- 235000012208 gluconic acid Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 2
- BTXXTMOWISPQSJ-UHFFFAOYSA-N 4,4,4-trifluorobutan-2-one Chemical class CC(=O)CC(F)(F)F BTXXTMOWISPQSJ-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 2
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007739 conversion coating Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000001630 malic acid Substances 0.000 description 2
- 235000011090 malic acid Nutrition 0.000 description 2
- ALTWGIIQPLQAAM-UHFFFAOYSA-N metavanadate Chemical compound [O-][V](=O)=O ALTWGIIQPLQAAM-UHFFFAOYSA-N 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 235000015424 sodium Nutrition 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- 239000011975 tartaric acid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002888 zwitterionic surfactant Substances 0.000 description 2
- 229910019617 (NH4)4Ce(SO4)4 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 150000001785 cerium compounds Chemical class 0.000 description 1
- 229910001429 cobalt ion Inorganic materials 0.000 description 1
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-UHFFFAOYSA-N 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- OKJMLYFJRFYBPS-UHFFFAOYSA-J tetraazanium;cerium(4+);tetrasulfate Chemical compound [NH4+].[NH4+].[NH4+].[NH4+].[Ce+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OKJMLYFJRFYBPS-UHFFFAOYSA-J 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/16—Metals
Definitions
- the present invention relates to a surface treatment method for an aluminum can.
- aluminum cans such as beverage cans manufactured from aluminum or an aluminum alloy are manufactured by a drawing process called a drawing and ironing process (hereinafter referred to as a DI process).
- a drawing and ironing process hereinafter referred to as a DI process.
- Aluminum powder (hereinafter referred to as smut) and lubricating oil generated by scraping during drawing are adhered to the surface of an aluminum can manufactured by DI processing.
- an aluminum can is subjected to chemical conversion treatment and painting treatment.
- chemical conversion treatment and painting treatment In order to form a strong chemical conversion coating and paint coating, the smut and lubricating oil adhering to the surface of the aluminum can before chemical conversion are sufficiently removed, and then the oxide film formed on the surface of the aluminum can Must be removed by etching.
- an acidic surface treatment solution (hereinafter sometimes referred to as an acid treatment solution) that can appropriately etch the surface of the aluminum can.
- an acid treatment solution a method of treating the surface of an aluminum can with an acid treatment solution containing trivalent iron ions and having a pH adjusted to 2 or less with sulfuric acid or nitric acid is known (see, for example, Patent Documents 1 and 2).
- a method for treating the surface of an aluminum can with an acid treatment solution containing an organic sulfonic acid, trivalent iron ions, and an inorganic acid such as sulfuric acid or nitric acid is also known (for example, Patent Document 3). reference).
- Patent Document 3 discloses that the treatment temperature of the acid treatment liquid can be lowered by treating the surface of the aluminum can with an acid treatment liquid containing an organic sulfonic acid. However, even when an acid treatment solution containing an organic sulfonic acid is used, etching may not sufficiently proceed at a low temperature.
- acid cleaning is performed at a relatively low temperature (for example, 50 ° C.).
- the surface of the substrate is etched by treatment with an alkaline solution performed before acid cleaning.
- the acid cleaning in this case is recognized to be aimed at removing magnesium segregated on the aluminum surface or neutralizing the surface of aluminum that has become alkaline by treatment with an alkaline solution before the acid cleaning.
- the purpose is completely different between the acid cleaning in the aluminum base treatment for the can lid and the process of etching the substrate surface with the acid treatment liquid performed in the surface treatment of the aluminum can.
- the etching amount on the aluminum can surface is not controlled, and the appearance of the aluminum can may not be controlled. Therefore, it is not possible to apply the technology related to the surface treatment of aluminum for can lids to the technology related to the surface treatment of aluminum cans.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide an aluminum can surface treatment method that can use an acid treatment solution that is easy to handle and that has a sufficiently low energy cost. It is.
- the present invention has an alkali treatment step of treating an aluminum can with an alkali treatment solution, and an acid treatment step of treating the aluminum can after the alkali treatment step with an acid treatment solution, and the etching amount in the alkali treatment step is ,
- a surface treatment method for an aluminum can that is less than 50 mg / m 2 .
- the alkali treatment solution preferably contains at least one selected from the group consisting of sodium ions, potassium ions and ammonium ions.
- the alkali treatment liquid is preferably 40 to 70 ° C., and the treatment time of the aluminum can in the alkali treatment step is preferably 1 to 30 seconds.
- the alkali treatment liquid preferably contains at least one selected from the group consisting of organic acids, chelating agents, dispersants and surfactants.
- the acid treatment solution contains at least one selected from the group consisting of sulfuric acid, nitric acid and phosphoric acid, contains 0.05 to 4 g / L of trivalent iron ions, has a pH of 2 or less,
- the treatment temperature of the aluminum can in the acid treatment step is preferably 30 to 65 ° C.
- the treatment time of the aluminum can in the acid treatment step is preferably 10 to 90 seconds.
- the present invention relates to an aluminum can that has been surface-treated by the surface treatment method for an aluminum can.
- an acid treatment liquid that is easy to handle and to provide a surface treatment method for an aluminum can that has a sufficiently low energy cost.
- the surface treatment method for an aluminum can according to this embodiment includes an alkali treatment step and an acid treatment step.
- Examples of the aluminum can treated by the surface treatment method according to the present embodiment include an aluminum can formed from a 3000 series alloy or the like.
- the aluminum can is treated with an alkali treatment liquid.
- the alkaline treatment liquid removes oil and fat components on the surface of the aluminum can. Moreover, when processing the aluminum can after DI processing, the alkaline processing liquid also plays a role of removing the lubricant.
- the etching amount of the aluminum can surface in the alkali treatment step is less than 50 mg / m 2 . That is, the surface of the aluminum can is hardly etched in the alkali treatment process. When the etching amount in the alkali treatment step is 50 mg / m 2 or more, it becomes difficult to control the etching, and the aluminum can surface is whitened.
- the amount of etching on the surface of the aluminum can in the alkali treatment step is determined by measuring the mass of the aluminum can with a precision balance before and after the alkali treatment step, and dividing the decrease in the mass of the aluminum can before and after the alkali treatment step by the surface area of the aluminum can. Can be obtained.
- the etching amount of the aluminum in order to make the etching amount of the aluminum can surface less than 50 mg / m 2 , the pH of the alkali treatment solution, the concentration of the alkaline substance in the alkali treatment solution, the treatment time of the alkali treatment step, the treatment of the alkali treatment step It is necessary to control the temperature. More specifically, the amount of etching on the surface of the aluminum can can be increased by increasing the concentration of the alkaline substance in the alkali treatment liquid, that is, by increasing the pH of the alkali treatment liquid. Can be reduced. Also, it is possible to increase the etching amount on the surface of the aluminum can by increasing the treatment time of the alkali treatment step or increasing the alkali treatment temperature.
- the treatment time is shortened or the treatment temperature is lowered.
- the etching amount can be reduced. It is not necessary to adjust all of these elements, and the etching amount on the aluminum can surface can be reduced to less than 50 mg / m 2 by adjusting some elements.
- the alkali treatment liquid preferably has a pH of 9 to 14.
- a hydroxide film can be formed on the surface of the aluminum can.
- the hydroxide film formed on the surface of the aluminum can in the alkali treatment step is dissolved by the acid treatment solution in the acid treatment step described later.
- the pH of the alkali treatment liquid is more preferably 10.0 to 13.0.
- the alkali treatment liquid preferably contains at least one selected from the group consisting of sodium ions, potassium ions and ammonium ions.
- a hydroxide film can be effectively formed on the surface of the aluminum can.
- inorganic substances such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate, sodium salts of organic acids such as gluconic acid and citric acid, Organic materials such as potassium salt and ammonium salt can be mentioned. These compounds may be used in combination of two or more.
- An inorganic substance such as sodium hydroxide is an alkaline substance and serves as a supply source of sodium ions, potassium ions, or ammonium ions, and also as a supply source of hydroxide ions.
- the alkali treatment liquid is preferably an aqueous solution containing sodium hydroxide.
- a hydroxide film can be more effectively formed on the surface of the aluminum can.
- the concentration of an alkaline substance such as sodium hydroxide in the alkali treatment liquid is preferably 0.01 to 10 g / L.
- concentration of the alkaline substance in the alkaline treatment liquid is smaller than 0.01 g / L, a hydroxide film tends to be hardly formed on the surface of the aluminum can.
- concentration is larger than 10 g / L, the surface of the aluminum can Etching excessively may cause whitening.
- the alkali treatment liquid preferably contains at least one selected from the group consisting of organic acids, chelating agents, dispersants and surfactants.
- the alkali treatment liquid contains an organic acid, a chelating agent, a dispersant, or a surfactant
- the surface of the aluminum can be removed even if the alkali treatment step is performed under mild conditions (eg, low temperature and short time). Smut can be efficiently removed to promote the formation of a hydroxide film.
- the organic acid contained in the alkali treatment liquid examples include gluconic acid, citric acid, oxalic acid, malic acid, tartaric acid, sorbic acid, succinic acid, and alkali metal salts such as sodium salt and potassium salt thereof.
- the alkali treatment liquid contains at least one selected from the group consisting of gluconic acid, citric acid, oxalic acid, malic acid, and tartaric acid.
- the chelating agent contained in the alkali treatment liquid examples include aminocarboxylic acid chelating agents, phosphonic acid chelating agents, and condensed phosphates. Specific examples include ethylenediaminetetraacetic acid (EDTA), sodium 1-hydroxyethylidene-1,1-diphosphonate (HEDP), sodium nitrilotriacetate (NTA), and sodium tripolyphosphate (STPP).
- the alkali treatment liquid more preferably contains at least one of ethylenediaminetetraacetic acid (EDTA) and 1-hydroxyethylidene-1,1-diphosphonate sodium (HEDP).
- the dispersant contained in the alkali treatment liquid examples include an acrylic acid maleic acid copolymer, a sodium salt thereof, a polycarboxylic acid, and polyethylene glycol. Among these, it is more preferable that the alkali treatment liquid contains an acrylic acid maleic acid copolymer.
- nonionic, cationic, anionic and zwitterionic surfactants are used as the surfactant contained in the alkali treatment liquid.
- nonionic compounds are particularly preferable.
- hydrocarbon derivatives, abietic acid derivatives, alcohol ethoxylates, modified polyethoxylated alcohols, and the like are preferably used.
- the alkali treatment liquid contains at least one selected from the group consisting of organic acids, chelating agents, and dispersants, and a surfactant. That is, a preferable combination of additives contained in the alkali treatment liquid is a combination of at least one selected from the group consisting of an organic acid, a chelating agent, and a dispersant and a surfactant. Since the alkali treatment liquid contains such a combination of additives, the surface of the aluminum can can be smut even if the alkali treatment step is performed under mild conditions (for example, low temperature and short time) as described above. Both the lubricant and the lubricating oil can be efficiently removed to further promote the formation of the hydroxide film.
- the alkali treatment liquid contains at least one selected from the group consisting of an organic acid, a chelating agent, and a dispersant, and a surfactant, even if the alkali treatment is performed under mild conditions, As a result, the desmutability of the aluminum can after the surface treatment can be further improved.
- the treatment time of the aluminum can in the alkali treatment step is preferably 1 to 30 seconds. If the treatment time of the aluminum can in the alkali treatment step is shorter than 1 second, a hydroxide film tends to be hardly formed on the surface of the aluminum can, and if it is longer than 30 seconds, the surface of the aluminum can is excessively etched. As a result, whitening may occur.
- the treatment time of the aluminum can in the alkali treatment step is more preferably 3 to 20 seconds.
- the treatment temperature of the aluminum can in the alkali treatment step (the temperature of the alkali treatment solution) is preferably 40 to 70 ° C. If the treatment temperature of the aluminum can in the alkali treatment step is lower than 40 ° C, a hydroxide film tends to be hardly formed on the surface of the aluminum can. If the treatment temperature is higher than 70 ° C, the surface of the aluminum can is excessively etched. As a result, whitening may occur.
- the treatment temperature of the aluminum can in the alkali treatment step is more preferably 45 to 60 ° C.
- the treatment method of the aluminum can in the alkali treatment process is not particularly limited.
- Examples of the method for treating the aluminum can in the alkali treatment step include a spray method and a dipping method.
- the treatment with the alkali treatment liquid described above may be performed once or a plurality of times.
- the treatment conditions (pH of the alkali treatment liquid, treatment temperature, treatment time, etc.) in each treatment may be the same or changed. Good.
- the aluminum can after the alkali treatment step is treated with an acid treatment solution.
- a hydroxide film is formed without being passivated in the alkali treatment step described above. Since the hydroxide film is easily dissolved by the acid treatment solution, the surface of the aluminum can can be etched by the low temperature acid treatment solution in the acid treatment step. If the surface of the aluminum can is treated in the acid treatment step without performing the alkali treatment step, the surface of the aluminum can is passivated, so the temperature of the acid treatment solution needs to be increased in order to advance the etching. There is.
- the treatment temperature of the aluminum can in the acid treatment step (the temperature of the acid treatment solution) is high, the energy cost in the surface treatment of the aluminum can becomes too high, which is not preferable.
- the temperature of the acid treatment liquid can be lowered by 5 to 20 ° C. compared to the case where the alkali treatment step is not performed.
- the acid treatment solution preferably has a pH of 2 or less.
- pH of the acid treatment solution is larger than 2, etching of the aluminum can surface tends to be insufficient.
- the acid treatment liquid preferably contains an inorganic acid.
- the inorganic acid has a function as an etching accelerator.
- Specific examples of the inorganic acid include sulfuric acid, nitric acid, and phosphoric acid, and these inorganic acids are used alone or in combination.
- sulfuric acid is more preferably used from the viewpoint of nitrogen-free and phosphorus-free.
- the content of the inorganic acid in the acid treatment liquid is preferably 0.01 to 25 g / L.
- the etching rate is extremely reduced, and when it exceeds 25 g / L, no further effect on the etching is recognized. It is economically disadvantageous.
- a more preferable content of the inorganic acid in the acid treatment solution is 0.5 to 20 g / L.
- the acid treatment liquid preferably contains an oxidized metal ion.
- the etching reaction of aluminum in the acid treatment step includes an anode reaction in which aluminum becomes aluminum ions (Al 3+ ), and a cathode reaction in which H + in the acid treatment solution is reduced to 1 / 2H 2 .
- an oxidized metal ion such as ferric ion (Fe 3+ )
- Fe 3+ ferric ion
- the adhesiveness of the chemical conversion treatment film formed by the chemical conversion treatment after an acid treatment process and a metal improves because an acid treatment liquid contains an oxidation type metal ion.
- the oxidized metal ions include metavanadate ions (VO 3 ⁇ ), cerium ions (Ce 4+ ), cobalt ions (Co 5+ ), stannic ions (Sn). 4+ ) and the like.
- trivalent iron ions are preferably used as the oxidized metal ions. Since the oxidized metal ion is preferably supplied as a water-soluble salt such as sulfate or nitrate, the trivalent iron ion is preferably supplied as ferric sulfate or ferric nitrate. As the etching reaction proceeds, the ferrous ion (Fe 2+ ) concentration increases, so that the oxidation-reduction potential (hereinafter referred to as ORP: oxidation-reduction potential) decreases (also referred to as aging of the cleaning agent), and the aluminum surface The etching promoting effect disappears.
- ORP oxidation-reduction potential
- an oxidizing agent for controlling ORP may be added as needed or added from the beginning to oxidize ferrous ions to ferric ions.
- an oxidizing agent for ORP control at this time hydrogen peroxide (H 2 O 2 ), persulfate (for example, NaS 2 O 8 2 ⁇ ), ozone (O 3 ), cerium compound (for example, cerium ammonium sulfate) : (NH 4 ) 4 Ce (SO 4 ) 4 ), nitrites (for example, NaNO 2 , KNO 2 ) and the like.
- H 2 O 2 hydrogen peroxide
- persulfate for example, NaS 2 O 8 2 ⁇
- cerium compound for example, cerium ammonium sulfate
- nitrites for example, NaNO 2 , KNO 2
- the content of oxidized metal ions in the acid treatment liquid is preferably 0.05 to 4 g / L.
- the content of oxidized metal ions in the acid treatment solution is more preferably 0.1 to 1 g / L.
- the acid treatment liquid preferably contains a surfactant.
- the surfactant mainly has a function of removing oil and fat components and lubricant remaining on the surface of the aluminum can. Moreover, it also has a function of preventing the removed oil and fat component and lubricant component from floating in the cleaning agent. That is, when the oil and fat component and the lubricant component are suspended in the cleaning agent, there is a risk of re-adsorption on the surface of the aluminum can, but by adding a surfactant to the acid treatment liquid, This problem can be avoided.
- nonionic, cationic, anionic or zwitterionic surfactants are used as the surfactant.
- nonionic type is particularly preferable, and for example, ethoxylated alkylphenol type, hydrocarbon derivative, abietic acid derivative, primary ethoxylated alcohol, modified polyethoxylated alcohol and the like are preferably used.
- the content of the surfactant in the acid treatment liquid is preferably 0.01 to 10 g / L.
- the content of the surfactant in the acid treatment liquid is less than 0.01 g / L, the detergency, particularly degreasing, is reduced.
- the content exceeds 10 g / L the acid treatment agent is foamed and treated. Is difficult, and wastewater treatment is burdened.
- a more preferable content of the surfactant in the acid treatment solution is 0.1 to 5 g / L.
- the organic sulfonic acid in the acid treatment liquid is preferably 0.01 to 25 g / L. If the content of the organic sulfone in the acid treatment liquid is less than 0.01 g / L, a sufficient etching amount may not be obtained, and if it exceeds 25 g / L, the liquid stability of the acid treatment liquid is low. It tends to decrease. From the viewpoint of reducing the drainage load, the content of the organic sulfonic acid in the acid treatment liquid is more preferably 0.1 to 5 g / L.
- the etching amount on the surface of the aluminum can in the acid treatment step is 60 to 100 mg / m 2 . If the etching amount in the acid treatment step is less than 60 mg / m 2 , the etching is insufficient, so that it tends to be difficult to form a chemical conversion treatment film or a paint film described later on the surface of the aluminum can. If the etching amount in the acid treatment step is more than 100 mg / m 2 , the etching progresses too much, and the surface of the aluminum can may be whitened.
- the amount of etching on the surface of the aluminum can in the acid treatment step is determined by measuring the mass of the aluminum can with a precision balance before and after the acid treatment step, and dividing the decrease in the mass of the aluminum can before and after the acid treatment step by the surface area of the aluminum can. Can be obtained.
- the treatment method of the aluminum can in the acid treatment step is not particularly limited.
- Examples of the method for treating the aluminum can in the acid treatment step include a spray method and a dipping method.
- the treatment time of the aluminum can in the acid treatment step is preferably 10 to 90 seconds. If the treatment time of the aluminum can in the acid treatment step is shorter than 10 seconds, the treatment time is too short, so the etching of the aluminum can surface tends to be insufficient, and if it is longer than 90 seconds, the surface of the aluminum can is excessive. Etching tends to accelerate the aging of the acid treatment agent.
- the treatment time of the aluminum can in the acid treatment step is more preferably 30 to 45 seconds.
- the treatment temperature of the aluminum can in the acid treatment step is preferably 30 to 65 ° C.
- the treatment temperature of the aluminum can in the acid treatment step is more preferably 40 to 60 ° C.
- the aluminum can after the acid treatment step is washed with water according to a conventionally known method and then subjected to a chemical conversion treatment with a phosphate-based or zircon-based chemical conversion treatment solution.
- the aluminum can after the chemical conversion treatment is subjected to a coating treatment after being washed with water as necessary.
- the aluminum can which has been surface-treated by the surface treatment method for an aluminum can according to the present embodiment can form a strong chemical conversion treatment film and a paint film since the surface smut and lubricating oil are sufficiently removed. .
- a lidless container having a lubricating oil and a smut attached, prepared by DI processing of an aluminum plate made of 3004 alloy was prepared. This was spray-treated for 10 seconds at a treatment temperature of 40 ° C. using an alkali treatment liquid whose pH was adjusted to 12.5 with sodium hydroxide as an alkaline substance (alkali treatment).
- alkali treatment contained 1 g / L ferric ion and 2 g / L nonionic surfactant, and the pH was adjusted to 1.0 with sulfuric acid as an acidic substance.
- Spray treatment was performed using an acid treatment solution at a treatment temperature of 50 ° C. for 40 seconds (acid treatment).
- the supply source of the ferric ion of an acid treatment liquid is ferric sulfate.
- the alkaline treatment liquid adjusted to the pH shown in Tables 1 and 2 was used at the treatment temperature and treatment time shown in Tables 1 and 2.
- the same aluminum can as in Example 1 was sprayed (alkali treatment).
- ferric ions, a nonionic surfactant, and an organic sulfonic acid HSO 3 —CH 2 CH (OH) CH 2 OH
- the aluminum can was processed on the same conditions as Example 1 except changing conditions as shown in Table 1 and Table 2.
- Example 21 and Comparative Example 11 a mixture of sulfuric acid and nitric acid (mass ratio: 10 to 1) was used.
- Example 22 and Comparative Example 12 a mixture of sulfuric acid and phosphoric acid (mass ratio: 10 to 1) was used.
- Example 23 and Comparative Example 13 a mixture of sulfuric acid and hydrofluoric acid (mass ratio: 10 to 1) was used as an acidic substance.
- Comparative Examples 5 to 15 and Reference Examples 1 to 3 a solution obtained by diluting an acid treatment solution that uses an aluminum can in the next acid treatment step without performing an alkali treatment step to a half concentration Then, after washing for 10 seconds at the same temperature as the acid treatment, it was subjected to an acid treatment step.
- Example 23 and Comparative Example 13 ferric ions were not included in the acid treatment liquid, and in Comparative Examples 3 and 6, surfactants were not included in the acid treatment liquid, respectively.
- Comparative Example 16 ⁇ Comparative Example 16>
- the alkali treatment step was not performed, the surfactant and the chelating agent were contained, and the treatment temperature was 60 with an alkaline degreasing solution adjusted to pH 12.5 with sodium hydroxide as an alkaline substance.
- Spray treatment was performed at 60 ° C. for 60 seconds (alkali degreasing treatment).
- the aluminum can after the alkali treatment was subjected to an acid treatment step performed under the conditions shown in Table 2.
- Examples 27 to 44 and Comparative Example 17 In the alkali treatment step, an alkali acid containing an organic acid, a chelating agent, a dispersant, and a surfactant at the concentrations shown in Table 3 and adjusted to the pH shown in Table 3 using the alkaline substance shown in Table 3 was used. Using the treatment liquid, the same aluminum can as in Example 1 was sprayed (alkali treatment) at the treatment temperature and treatment time shown in Table 3. In the acid treatment step, the treatment temperatures shown in Table 3 using an acid treatment solution containing ferric ions and nonionic surfactants at the concentrations shown in Table 3 and adjusted to the pH shown in Table 3 were used.
- the aluminum can was processed on the same conditions as Example 1 except changing conditions as shown in Table 3.
- the surfactant was included in the alkali treatment liquid, 2 g / L nonionic surfactant was included.
- the acrylic acid maleic acid copolymer contained in Example 35 is SOKALAN CP5 manufactured by BASF Japan.
- Comparative Example 17 the same aluminum can as in Example 1 was sprayed at the treatment temperature and treatment time shown in Table 3 using an acidic solution containing 0.5 g / L of citric acid without performing the alkali treatment step. Processed. Subsequently, in the acid treatment step, ferric ions and nonionic surfactants are contained at the concentrations shown in Table 3, and the acid treatment liquid adjusted to the pH shown in Table 3 is used and shown in Table 3. Aluminum cans were sprayed at different processing temperatures and times.
- Examples 1 to 11, 13 to 15, and 17 were compared with Reference Example 1, Examples 1 to 11, 13 to 15, and 17 showed good evaluation results as in Reference Example 1.
- the treatment temperature in the acid treatment step is 20 ° C. lower than that in Reference Example 1.
- the temperature of the acid treatment step could be lowered by 20 ° C. by performing the alkali treatment step before the acid treatment step.
- Example 25 has a good evaluation result as in Reference Example 2, while the treatment temperature in the acid treatment step is higher than that in Reference Example 2. Is also 20 ° C lower. Thus, even if the acid treatment liquid contains an organic sulfonic acid, the temperature of the acid treatment step could be reduced by 20 ° C. by performing the alkali treatment step prior to the acid treatment step. .
- Example 26 has a good evaluation result similar to Reference Example 3, while the treatment temperature in the acid treatment step is higher than that of Reference Example 3. Is also 10 ° C lower.
- the temperature of the acid treatment step is 10 ° C. by performing the alkali treatment step prior to the acid treatment step. It was possible to reduce.
- the alkali treatment liquid contains these as compared with the case where no organic acid, chelating agent, dispersant or surfactant is contained.
- the alkali treatment step was performed under mild conditions (for a short time)
- the desmutability of the surface-treated aluminum can was improved.
- the alkali treatment liquid contains an organic acid, a chelating agent or a dispersant
- the formation of a hydroxide film is promoted by efficiently removing the smut on the surface of the aluminum can.
- the alkali treatment liquid contains a surfactant, it is expected that the formation of a hydroxide film is promoted by efficiently removing the lubricating oil on the surface of the aluminum can.
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Abstract
Description
アルカリ処理工程においては、アルミニウム缶をアルカリ処理液によって処理する。
アルカリ処理液は、アルミニウム缶表面の油脂成分を除去する。また、DI加工後のアルミニウム缶を処理する場合であれば、アルカリ処理液は潤滑剤を除去する役割も担う。
このような組み合わせの添加剤を、アルカリ処理液が含有することで、上記のように、穏やかな条件(例えば、低温度・短時間)でアルカリ処理工程を行っても、アルミニウム缶の表面のスマット及び潤滑油の両方を効率的に除去して水酸化物の皮膜の形成をより促進することができる。このように、アルカリ処理液が有機酸、キレート剤及び分散剤からなる群より選択される少なくとも1種と、界面活性剤と、を含有すれば、穏やかな条件でアルカリ処理を行ったとしても、結果的に表面処理後のアルミニウム缶の脱スマット性をより向上させることができる。
アルカリ処理工程において、アルカリ処理液による処理を複数回行う場合には、それぞれの処理における処理条件(アルカリ処理液のpH、処理温度、処理時間等)を同一にしてもよいし、変更してもよい。
酸処理工程においては、アルカリ処理工程後のアルミニウム缶を、酸処理液によって処理する。
アルミニウム缶の表面は、上述したアルカリ処理工程において、不動態化されることなく、水酸化物の皮膜が形成される。水酸化物の皮膜は、酸処理液によって容易に溶けるので、酸処理工程においては、低温の酸処理液によってアルミニウム缶表面をエッチングすることが可能である。仮に、アルカリ処理工程を行うことなく、酸処理工程でアルミニウム缶表面を処理した場合には、アルミニウム缶表面が不動態化してしまうことから、エッチングを進行させるために酸処理液の温度を上げる必要がある。酸処理工程における、アルミニウム缶の処理温度(酸処理液の温度)が高いと、アルミニウム缶の表面処理におけるエネルギーコストが高くなりすぎるので好ましくない。酸処理工程の前にアルカリ処理工程を行うことにより、アルカリ処理工程を行わない場合に比べて、酸処理液の温度を5~20℃低温化させることができる。
無機酸は、エッチング促進剤としての機能を有する。無機酸の具体例としては、硫酸、硝酸、リン酸が挙げられ、これらの無機酸が単独使用若しくは併用される。なお、窒素フリー及びりんフリーの観点から、硫酸がより好ましく用いられる。
通常、酸処理工程におけるアルミニウムのエッチング反応は、アルミニウムがアルミニウムイオン(Al3+)となるアノード反応と、酸処理液中のH+が還元されて1/2H2となるカソード反応とからなる。このため、酸処理液中に第二鉄イオン(Fe3+)のような酸化型金属イオンを添加すると、このFe3+がFe2+に還元されるアノード反応が前記H+の還元と同時に起こり、アルミニウムのエッチング反応が促進される。また、酸処理液が酸化型金属イオンを含有することで、酸処理工程後の化成処理により形成される化成処理皮膜と金属との密着性が向上する。
界面活性剤は、主として、アルミニウム缶の表面に残存した油脂成分や潤滑剤を除去する機能を有する。また、除去された油脂成分や潤滑剤成分が、洗浄剤中で浮遊することを防止する機能も有する。すなわち、油脂成分や潤滑剤成分が洗浄剤中で浮遊してしまった場合には、アルミニウム缶の表面に再吸着してしまうおそれがあるが、酸処理液に界面活性剤を含有させることにより、この問題を回避できる。
酸処理工程後のアルミニウム缶は、従来公知の方法に従って水洗後、リン酸塩系やジルコン系の化成処理液による化成処理に供される。
化成処理後のアルミニウム缶は、必要に応じて水洗を行った後に、塗装処理に供される。
アルミニウム缶として、3004合金のアルミニウム板をDI加工して得られた、潤滑油とスマットが付着した蓋なし容器を準備した。これを、アルカリ性物質としての水酸化ナトリウムによってpHが12.5に調整されたアルカリ処理液を用いて、処理温度40℃で10秒間スプレー処理した(アルカリ処理)。次いで、アルカリ処理後のアルミニウム缶を、1g/Lの第二鉄イオンと、2g/Lのノニオン系界面活性剤と、を含有し、酸性物質としての硫酸によってpHが1.0に調整された酸処理液を用いて、処理温度50℃で40秒間スプレー処理した(酸処理)。なお、酸処理液の第二鉄イオンの供給源は、硫酸第二鉄である。
アルカリ処理工程において、表1及び表2に示すアルカリ性物質を用いて、表1及び表2に示すpHに調整したアルカリ処理液を用いて表1及び表2に示す処理温度と処理時間で、実施例1と同じアルミニウム缶をスプレー処理した(アルカリ処理)。酸処理工程においては、表1及び表2に示す濃度で第二鉄イオンと、ノニオン系界面活性剤と、必要に応じて有機スルホン酸(HSO3-CH2CH(OH)CH2OH)と、を含有し、表1及び表2に示すpHに調整した酸処理液を用いて表1及び表2に示した処理温度と処理時間で、アルカリ処理後のアルミニウム缶をスプレー処理した(酸処理)。
このように表1及び表2に示したように条件を変更する以外は、実施例1と同条件でアルミニウム缶を処理した。
比較例16では、アルカリ処理工程を行わず、界面活性剤と、キレート剤と、を含有し、アルカリ性物質としての水酸化ナトリウムによってpHが12.5に調整されたアルカリ脱脂液によって、処理温度60℃で60秒間スプレー処理した(アルカリ脱脂処理)。次いで、アルカリ処理後のアルミニウム缶を、表2に示す条件で行われる酸処理工程に供した。
アルカリ処理工程において、表3に示す濃度で有機酸と、キレート剤と、分散剤と、界面活性剤と、を含有し、表3に示すアルカリ性物質を用いて表3に示すpHに調整したアルカリ処理液を用いて表3に示す処理温度と処理時間で、実施例1と同じアルミニウム缶をスプレー処理した(アルカリ処理)。酸処理工程においては、表3に示す濃度で第二鉄イオンと、ノニオン系界面活性剤と、を含有し、表3に示すpHに調整した酸処理液を用いて表3に示した処理温度と処理時間で、アルカリ処理後のアルミニウム缶をスプレー処理した(酸処理)。
このように表3に示したように条件を変更する以外は、実施例1と同条件でアルミニウム缶を処理した。なお、アルカリ処理液に界面活性剤を含有させる場合には、2g/Lのノニオン系界面活性剤を含有させた。また、実施例35の含有するアクリル酸マレイン酸コポリマーは、BASFジャパン社製のSOKALAN CP5である。
(a)エッチング量
アルカリ処理工程前後で、アルミニウム缶の質量を精密天秤により測定した。アルカリ処理工程前後でのアルミニウム缶の質量の減少量をアルミニウム缶の表面積で除した数値をエッチング量とし、エッチング量を以下の2段階で評価した。結果を表1、表2及び表3に示す。
A:50mg/m2未満
B:50~100mg/m2
乾燥後の容器内の白さを目視にて判定した。脱脂及び脱スマットが完全で十分にエッチングされた白い外観を有する場合に良とし、白化の程度に応じて以下の5段階で評価した。結果を表1、表2及び表3に示す。
A:全面白色
B:部分的に薄く灰色
C:全体に薄く灰色
D:部分的に灰色
E:全面灰色
化成処理後のスプレー水洗の直後の容器を3回振って水切りし、容器を上向きに静置して30秒後の容器外表面の水ぬれ面積(%)を測定した。結果を表1、表2及び表3に示す。
本実施例、比較例及び参考例で得られた表面処理後のアルミニウム缶の表面に透明粘着テープを密着し、次にこれを剥離して白色台紙上に貼り付け、テープ張り付け面の白さを他の台紙部分と比較した。完全にスマットが除去されて汚染のない場合を良とし、汚染の程度に応じて以下の5段階で評価した。結果を表1、表2及び表3に示す。
5:汚染なし
4:痕跡程度の汚染
3:僅かな汚染
2:中程度の汚染
1:多大な汚染
本実施例、比較例及び参考例で得られた表面処理後のアルミニウム缶を、沸騰水道水中に30分間浸漬した後の外観評価を次の基準で行った。結果を表1、表2及び表3に示す。
5:外観の変化なし
4:部分的に薄く黒変
3:全体的薄く黒変
2:部分的に濃く黒変
1:全面黒変
Claims (7)
- アルミニウム缶をアルカリ処理液によって処理するアルカリ処理工程と、
前記アルカリ処理工程後のアルミニウム缶を酸処理液によって処理する酸処理工程と、を有し、
前記アルカリ処理工程におけるエッチング量は、50mg/m2未満であるアルミニウム缶の表面処理方法。 - 前記アルカリ処理液はナトリウムイオン、カリウムイオン及びアンモニウムイオンからなる群より選択される少なくとも1種を含有する請求項1記載のアルミニウム缶の表面処理方法。
- 前記アルカリ処理液は、40~70℃であり、
前記アルカリ処理工程におけるアルミニウム缶の処理時間は、1~30秒間である請求項1又は2記載のアルミニウム缶の表面処理方法。 - 前記アルカリ処理液は、有機酸、キレート剤、分散剤及び界面活性剤からなる群より選択される少なくとも1種を含有する請求項1から3のいずれか記載のアルミニウム缶の表面処理方法。
- 前記酸処理液は、硫酸、硝酸及びリン酸からなる群より選択される少なくとも1種を含有し、3価の鉄イオンを0.05~4g/L含有し、pHが2以下であり、
前記酸処理工程におけるアルミニウム缶の処理温度は、30~65℃である請求項1から4のいずれか記載のアルミニウム缶の表面処理方法。 - 前記酸処理工程におけるアルミニウム缶の処理時間は、10~90秒間である請求項1から5のいずれか記載のアルミニウム缶の表面処理方法。
- 請求項1から6のいずれか記載のアルミニウム缶の表面処理方法によって表面処理されたアルミニウム缶。
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US15/024,233 US20160230290A1 (en) | 2013-09-27 | 2014-09-09 | Method for treating surface of aluminum can |
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CN109064902B (zh) * | 2018-09-20 | 2020-12-11 | 武汉天马微电子有限公司 | 一种显示面板及显示装置 |
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