JP4468101B2 - 金属材料及び表面処理方法 - Google Patents
金属材料及び表面処理方法 Download PDFInfo
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- JP4468101B2 JP4468101B2 JP2004224019A JP2004224019A JP4468101B2 JP 4468101 B2 JP4468101 B2 JP 4468101B2 JP 2004224019 A JP2004224019 A JP 2004224019A JP 2004224019 A JP2004224019 A JP 2004224019A JP 4468101 B2 JP4468101 B2 JP 4468101B2
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- 238000000034 method Methods 0.000 title claims description 26
- 239000007769 metal material Substances 0.000 title claims description 19
- 238000004381 surface treatment Methods 0.000 title claims description 19
- 239000011148 porous material Substances 0.000 claims description 41
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 40
- 239000002344 surface layer Substances 0.000 claims description 36
- 239000010410 layer Substances 0.000 claims description 23
- 239000011777 magnesium Substances 0.000 claims description 23
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 21
- 229910052749 magnesium Inorganic materials 0.000 claims description 20
- 230000004888 barrier function Effects 0.000 claims description 16
- -1 alkaline earth metal carbonates Chemical class 0.000 claims description 13
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 150000003839 salts Chemical group 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 7
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 7
- 150000002894 organic compounds Chemical class 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 4
- 229910010272 inorganic material Inorganic materials 0.000 claims description 4
- 239000000347 magnesium hydroxide Substances 0.000 claims description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 125000003172 aldehyde group Chemical group 0.000 claims description 3
- 125000003277 amino group Chemical group 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 150000002484 inorganic compounds Chemical class 0.000 claims description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 150000004760 silicates Chemical class 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims description 2
- 125000001174 sulfone group Chemical group 0.000 claims description 2
- 238000011282 treatment Methods 0.000 description 34
- 239000011248 coating agent Substances 0.000 description 15
- 238000000576 coating method Methods 0.000 description 15
- 239000002932 luster Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 238000007743 anodising Methods 0.000 description 10
- 239000008151 electrolyte solution Substances 0.000 description 9
- 239000003381 stabilizer Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 239000000956 alloy Substances 0.000 description 7
- 239000010407 anodic oxide Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 238000004040 coloring Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 206010019860 Hereditary angioedema Diseases 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000001579 optical reflectometry Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 150000004679 hydroxides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229940104869 fluorosilicate Drugs 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910017855 NH 4 F Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- UQCVYEFSQYEJOJ-UHFFFAOYSA-N [Mg].[Zn].[Zr] Chemical compound [Mg].[Zn].[Zr] UQCVYEFSQYEJOJ-UHFFFAOYSA-N 0.000 description 1
- XVYHFPMIBWTTLH-UHFFFAOYSA-N [Zn].[Mg].[Ca] Chemical compound [Zn].[Mg].[Ca] XVYHFPMIBWTTLH-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- HZZOEADXZLYIHG-UHFFFAOYSA-N magnesiomagnesium Chemical compound [Mg][Mg] HZZOEADXZLYIHG-UHFFFAOYSA-N 0.000 description 1
- LBSANEJBGMCTBH-UHFFFAOYSA-N manganate Chemical compound [O-][Mn]([O-])(=O)=O LBSANEJBGMCTBH-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 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
- 239000000049 pigment Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
-
- 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
- C25D11/30—Anodisation of magnesium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
・実施例1
被処理材として、マグネシウム合金AZ31Bの0.5mm厚の圧延材を用い、酸による表面処理後、陽極電解酸化処理を施した。水酸化カリウム2±0.5mol/Lに、皮膜形成安定剤としてケイ酸ナトリウム+ジエチレングリコールを0.1±0.05mol/L添加し電解液とした。液温65±2℃、電流密度2.0±0.5A/dm2、電圧4〜8Vの電解条件にて30分間浸漬し、引き上げ後、公知の方法で封孔処理した。この処理により、厚さ10μmの陽極酸化皮膜を得た。
JIS―H8651に規定された火花放電型陽極酸化の代表であるMX−11処理(HAE処理)にて上記実施例1と同一のマグネシウム合金を処理した。この処理により、平均孔径5000nm以上の微細孔を有し約50μmの皮膜厚さを有する金属表面が得られた。
JISに規定されたMX−6処理にて上記実施例1と同一のマグネシウム合金を処理した。この処理により、平均孔径5000nm以下の微細孔を有する金属表面が得られた。
反射率は、ダイヤカット面を計測角度85°で測定したときの光反射率を100%とした場合の金属表面光反射率である。なお、被処理材元来の反射率は、84%であった。
この処理で得られる金属表面の反射率は68%であった。
この金属表面の反射率を測定すると8%であり、本実施例の処理に基づく金属表面に比べると光沢は殆どないに等しかった。
この金属表面の反射率は、約50%であったが、本実施例の処理に基づく金属表面に比べると光沢が劣っていた。
続いて、実施例1、比較例1、比較例2の3種の表面処理が施されたマグネシウム合金の染色性について比較検討した。
反射率は、ダイヤカット面を計測角度85°で測定したときの光反射率を100%とした場合の金属表面光反射率を示す。なお、被処理材元来の反射率は、84%であった。
実施例1と類似の電解条件にて同一の被処理材を用いて電解処理時間を調整し、酸化皮膜厚5μmのマグネシウム合金を製造した。このとき、電解液中の水酸化カリウム濃度を変更し電解条件を調整することにより微細孔平均孔径の異なるマグネシウム合金を製造した。平均孔径100nm(実施例6)、500nm(実施例7)、1000nm(実施例8)のマグネシウム合金を用意した。これら各マグネシウム合金表面の反射率を測定したところ、実施例6の反射率は95%、実施例7は75%、実施例8は65%であった。
以上のように、本実施例の表面処理方法によれば、塗膜密着性、着色性も良好であり、酸化皮膜後も金属光沢を有したままで鮮明な着色ができる。
Claims (7)
- マグネシウム又はマグネシウム合金からなる基材と、
平均孔径5nm〜1000nm、長さ1μm〜50μmで、長さ/孔径の比が1以上の微細孔が1mm2あたり1万個以上の密度で存在する膜厚が3〜50μmの表面層と、
上記表面層の底部にあって実質的に無孔のバリア層とからなる陽極酸化皮膜を有することを特徴とする金属材料。 - 上記表面層の光反射率は、計測角度85°にて反射率測定したとき60%以上であることを特徴とする請求項1記載の金属材料。
- 上記表面層は、水酸化マグネシウムが60〜99.9%、酸化マグネシウムが0.1〜40%、このほかにマンガン、チタン、モリブデン、ケイ素、タングステン、ジルコニウム、バナジウム、クロム、コバルト、パラジウム、リン、硫黄、臭素、フッ素、沃素、ホウ素、炭素、窒素、又はこれらの化合物、或いは有機化合物としてヒドロキシル基、アルデヒド基、カルボニル基、若しくはアミノ基を有する鎖状又は環状炭化水素を含有することを特徴とする請求項1記載の金属材料。
- 上記表面層は、電解着色されることを特徴とする請求項1記載の金属材料。
- アルカリ又はアルカリ土類金属の水酸化物、炭酸塩、重炭酸塩、ケイ酸塩、ケイフッ化塩から選ばれる少なくとも1種以上の塩を含む電解水溶液中にマグネシウム又はマグネシウム合金を浸漬し、これを電流密度0.7〜5A/dm2、電圧4〜10V、浴温度50〜80℃にて火花放電を伴わずに電解することによって、表面に平均孔径5nm〜1000nm、長さ1μm〜50μmで、長さ/孔径の比が1以上の微細孔が1mm2あたり1万個以上の密度で存在する膜厚が3〜50μmの表面層と該表面層の底部にあって実質的に無孔のバリア層とを有する陽極酸化皮膜を形成することを特徴とする表面処理方法。
- 上記電解水溶液は、アルカリ又はアルカリ土類金属の水酸化物、炭酸塩、重炭酸塩、ケイ酸塩、ケイフッ化塩を含む無機化合物、(CH2OH)2、(CH2CH2OH)O、(CH2OH)2CHOHを含むアルコール類、(COOH)2、(CH2CH2COOH)2、[CH(OH)COOH]2、C6H4(OHCOOH)、C6H5COOH、C6H4(COOH)2を含むカルボン酸、C6H4(SO3H・COOH)、C6H3(COOH・OH・SO3H)を含むスルホン基を有する有機化合物のうち少なくとも1つを含むことを特徴とする請求項5記載の表面処理方法。
- 上記電流密度が2.0±0.5A/dm 2 、上記電圧が4〜8V、浴温度が65±2℃であり、
上記表面層は、上記長さ8〜10μm、上記長さ/孔径の比が16〜20の微細孔が1mm 2 あたり100万個の密度で存在し、膜厚が3〜20μmであることを特徴とする請求項5記載の表面処理方法。
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JP4830095B2 (ja) * | 2005-05-19 | 2011-12-07 | 電化皮膜工業株式会社 | 金属材料及び表面処理方法 |
JP4668062B2 (ja) * | 2005-12-27 | 2011-04-13 | セイコークロック株式会社 | 時計用指針、それを備えた時計及び時計用指針の製造方法 |
JP4825002B2 (ja) * | 2005-12-27 | 2011-11-30 | 本田技研工業株式会社 | マグネシウム金属材料の製造方法 |
JP2007239057A (ja) * | 2006-03-10 | 2007-09-20 | Magnes:Kk | 部分着色マグネシウム体、その製造方法、およびその中間体 |
JP5329848B2 (ja) * | 2007-06-12 | 2013-10-30 | ヤマハ発動機株式会社 | マグネシウム合金部材の製造方法 |
JP2010030191A (ja) * | 2008-07-30 | 2010-02-12 | Chiba Inst Of Technology | 耐食性、耐熱性マグネシウム複合材料及びその製造方法 |
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CN102409383B (zh) * | 2011-11-09 | 2014-05-14 | 嘉兴学院 | 镁合金阳极氧化方法 |
JP6753899B2 (ja) * | 2017-08-23 | 2020-09-09 | 株式会社栗本鐵工所 | 皮膜形成方法及び金属材料 |
CN109926293A (zh) * | 2019-03-05 | 2019-06-25 | 六盘水师范学院 | 一种提高金属材料耐高温氧化的方法 |
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