JP4124761B2 - Mg or Mg alloy casing and manufacturing method thereof - Google Patents
Mg or Mg alloy casing and manufacturing method thereof Download PDFInfo
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- JP4124761B2 JP4124761B2 JP2004264400A JP2004264400A JP4124761B2 JP 4124761 B2 JP4124761 B2 JP 4124761B2 JP 2004264400 A JP2004264400 A JP 2004264400A JP 2004264400 A JP2004264400 A JP 2004264400A JP 4124761 B2 JP4124761 B2 JP 4124761B2
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- 229910052749 magnesium Inorganic materials 0.000 title claims description 53
- 229910000861 Mg alloy Inorganic materials 0.000 title claims description 46
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011777 magnesium Substances 0.000 claims description 53
- 239000000126 substance Substances 0.000 claims description 53
- 238000006243 chemical reaction Methods 0.000 claims description 46
- 238000000576 coating method Methods 0.000 claims description 34
- 239000011248 coating agent Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 238000005422 blasting Methods 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 11
- 239000011572 manganese Substances 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001424 calcium ion Inorganic materials 0.000 claims description 5
- ZSHHQOWEAFTSBF-UHFFFAOYSA-J calcium magnesium dihydrogen phosphate phosphate Chemical compound P(=O)([O-])([O-])[O-].[Mg+2].P(=O)([O-])(O)O.[Ca+2] ZSHHQOWEAFTSBF-UHFFFAOYSA-J 0.000 claims description 5
- 229910001437 manganese ion Inorganic materials 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 3
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 2
- 239000004137 magnesium phosphate Substances 0.000 claims description 2
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 2
- 229960002261 magnesium phosphate Drugs 0.000 claims description 2
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 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 1
- 230000000052 comparative effect Effects 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 238000000465 moulding Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000005530 etching Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
- 229910052748 manganese Inorganic materials 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 235000011007 phosphoric acid Nutrition 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- 238000004512 die casting Methods 0.000 description 4
- 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 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229960005069 calcium Drugs 0.000 description 3
- 238000007739 conversion coating Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010119 thixomolding Methods 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- FMONFPDCHXYHMY-UHFFFAOYSA-J P(=O)([O-])([O-])[O-].[Mn+2].P(=O)([O-])(O)O.[Ca+2] Chemical compound P(=O)([O-])([O-])[O-].[Mn+2].P(=O)([O-])(O)O.[Ca+2] FMONFPDCHXYHMY-UHFFFAOYSA-J 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229940043430 calcium compound Drugs 0.000 description 2
- 150000001674 calcium compounds Chemical class 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- ABXXWVKOBZHNNF-UHFFFAOYSA-N chromium(3+);dioxido(dioxo)chromium Chemical compound [Cr+3].[Cr+3].[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O ABXXWVKOBZHNNF-UHFFFAOYSA-N 0.000 description 2
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 2
- 229940125773 compound 10 Drugs 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000002697 manganese compounds Chemical class 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- 229910018131 Al-Mn Inorganic materials 0.000 description 1
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018461 Al—Mn Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229960001714 calcium phosphate Drugs 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- FAYYUXPSKDFLEC-UHFFFAOYSA-L calcium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [Ca+2].[O-]S([O-])(=O)=S FAYYUXPSKDFLEC-UHFFFAOYSA-L 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/083—Deburring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
- B24C11/005—Selection of abrasive materials or additives for abrasive blasts of additives, e.g. anti-corrosive or disinfecting agents in solid, liquid or gaseous form
-
- 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
- C23C22/73—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 characterised by the process
- C23C22/74—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 characterised by the process for obtaining burned-in conversion coatings
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Description
本発明は、本発明は、Ｍｇ又はＭｇ合金からなる成形体の表面に、簡易に化成処理膜を形成し、塗装の歩留まりを改善するＭｇ又はＭｇ合金筐体及びその製造方法に関する。 The present invention relates to a Mg or Mg alloy casing for easily forming a chemical conversion treatment film on the surface of a molded body made of Mg or Mg alloy and improving the yield of coating, and a method for manufacturing the same.
近年、ノートパソコンやＰＤＡなどのモバイル機器は、携帯し、屋外で使用する機会が多くなっている。これに伴い機器の小型軽量及び薄型化が要求されており、機器の全体質量の３０％を占める筐体の薄肉化が必要となってきている。しかし薄肉化した場合、樹脂筐体では十分な強度を保つことが困難になってきている。更にノートパソコンのＭＰＵの発熱量は増大してきている。今後、ＡＣ駆動時に発熱量１３〜１６Ｗになることが予定されており、高い冷却性能を持つ筐体の開発が急務になっている。 In recent years, mobile devices such as notebook computers and PDAs have been increasingly carried and used outdoors. Along with this, there is a demand for smaller, lighter and thinner devices, and it is necessary to reduce the thickness of the housing, which accounts for 30% of the total mass of the device. However, when the thickness is reduced, it has become difficult to maintain sufficient strength with the resin casing. Furthermore, the amount of heat generated by the MPU of the notebook personal computer is increasing. In the future, the amount of heat generated during AC drive is scheduled to be 13 to 16 W, and it is an urgent task to develop a casing with high cooling performance.
この問題の解決策として比強度が高く、低比重、高熱伝導のＡｌやＭｇ又はＭｇ合金等の軽金属が筐体材料として注目されている。特にＭｇ又はＭｇ合金は比重がＡｌの約７割と軽く、リサイクル性にも優れている。Ｍｇ又はＭｇ合金としては、既に、Ｍｇ−Ａｌ−Ｚｎ系、Ｍｇ−Ａｌ−Ｍｎ系、Ｍｇ又はＭｇ−Ａｌ−Ｓｉ系、Ｍｇ−Ａｌ−希土類元素（ＲＥ）系等が実用化されており、ダイカストやチクソモールディング、板金加工等の手段によって成形加工し、続いて、該成形加工品を化成処理し、続いて、該化成処理品を塗装処理して製品化する。前記において、ダイカストとは、溶融金属に圧力を加えて金型に注入して鋳造する方法であり、チクソモールディングとは、半溶融又は溶融状態で約６００℃の押し出し機から約２５０℃の金型に押し出し成形する方法をいう。 As a solution to this problem, light metals such as Al, Mg, or Mg alloys having high specific strength, low specific gravity, and high thermal conductivity are attracting attention as housing materials. In particular, Mg or Mg alloy has a specific gravity as light as about 70% of that of Al, and is excellent in recyclability. As Mg or Mg alloy, Mg-Al-Zn system, Mg-Al-Mn system, Mg or Mg-Al-Si system, Mg-Al-rare earth element (RE) system, etc. have already been put into practical use. Molding is performed by means such as die casting, thixo molding, sheet metal processing, and the like. Subsequently, the molded product is subjected to a chemical conversion treatment, and then the chemical conversion treatment product is subjected to a coating treatment to produce a product. In the above, die casting is a method in which molten metal is pressurized and poured into a mold and cast, and thixomolding is a mold at a temperature of about 250 ° C. from an extruder at about 600 ° C. in a semi-molten or molten state. Refers to the method of extrusion molding.
化成処理とは、Ｍｇ又はＭｇ合金の表面に防食機能を有する化成被膜を形成する処理で、６価クロム溶液を主成分とするクロム酸溶液や６価クロムを含まないノンクロム酸溶液等にＭｇ又はＭｇ合金を浸漬することにより、該Ｍｇ又はＭｇ合金の表面にクロム酸クロム錯塩の被膜（一般的にxCrO3・yCr2O3・2H2OやCr(OH)2・HCrO4・2H2O等）を形成するものである。この化成処理の後、塗装処理を施す。化成処理の方法としては、下記特許文献１〜２が提案されている。 The chemical conversion treatment is a treatment for forming a chemical conversion coating having an anticorrosive function on the surface of Mg or Mg alloy, such as a chromic acid solution containing a hexavalent chromium solution as a main component or a non-chromic acid solution containing no hexavalent chromium. By immersing the Mg alloy, a chromium chromate complex salt coating (generally xCrO 3 · yCr 2 O 3 · 2H 2 O or Cr (OH) 2 · HCrO 4 · 2H 2 O Etc.). After this chemical conversion treatment, a coating treatment is performed. The following patent documents 1 and 2 are proposed as a chemical conversion treatment method.
Ｍｇ又はＭｇ合金を素材として製品を製造する場面においては下記の問題点がある。ダイカストやチクソモールド等の成形手段によって得た成形加工品にはバリがある。このバリを除去する為には、現状においては、バリをプレスで打ち抜いたり、切削等の機械加工で除去したり、手仕上げで除去したりしているが、いずれの方法も厄介な作業となる。また、成形加工品に砥粒をエアーで吹き付けるショットブラストでバリを除去する方法もあるが、Ｍｇ又はＭｇ合金や砥粒の粉塵が発生、飛散し易く、作業性が悪いという問題や、粉塵爆発の危険性が高いという問題点がある。 There are the following problems when manufacturing products using Mg or Mg alloys as raw materials. A molded product obtained by molding means such as die casting or thixo mold has burrs. In order to remove the burrs, at present, the burrs are punched out by press, removed by machining such as cutting, or removed by hand finishing, but both methods are troublesome work. . There is also a method of removing burrs by shot blasting in which abrasive grains are blown with air on molded products. However, Mg or Mg alloys and abrasive grains are easily generated and scattered, resulting in poor workability and dust explosion. There is a problem that the risk of is high.
また前記の化成処理を施す際には、前処理が必要である。通常の化成処理工程は、前記成形加工品を脱脂処理した後、更に酸で洗浄処理し、続いて、成形加工品から成形時に使用した離形剤を除去する為にエッチング処理し、続いて、成形加工品の表面にクロム酸クロム錯塩の被膜が形成し易いように表面を梨地面状に磨く表面調整処理を行い（以上の処理が化成処理の前処理となる。）、続いて、該成形加工品を前記クロム酸溶液やノンクロム酸溶液等に浸漬して化成処理を行い、続いて、この化成処理品を水洗し、更に７０℃前後で乾燥することにより化成被膜を硬化するものである。このように、化成処理の前処理は、脱脂処理や洗浄処理やエッチング処理表面調整処理等、幾つもの工程を行わねばならず、作業が厄介で、処理装置が複雑となったり、処理コストが高くなる。 Moreover, when performing the said chemical conversion treatment, pre-processing is required. In the usual chemical conversion treatment step, the molded product is degreased and then further washed with an acid, followed by etching to remove the mold release agent used at the time of molding from the molded product, The surface of the molded product is subjected to a surface conditioning treatment so that a chromium chromate complex film can be easily formed (the above treatment is a pretreatment for the chemical conversion treatment), and then the molding is performed. A chemical conversion treatment is performed by immersing the processed product in the chromic acid solution, non-chromic acid solution, or the like, and then the chemical conversion treatment product is washed with water and further dried at around 70 ° C. to cure the chemical conversion film. In this way, the pretreatment of the chemical conversion treatment has to be carried out in several steps such as degreasing treatment, cleaning treatment and etching treatment surface adjustment treatment, which is cumbersome, complicated processing equipment, and high processing cost. Become.
ダイカストやチクソモールド等の成形によって製作した成形加工品は、引け、ボイド、湯流れ跡等の成形不良部分が発生する。この成形不良（引け、ボイド、流れ等）の検査時に、該成形加工品を見やすくする為に部分的に手作業でバフ掛けを行い、その後、目視で検査を行っているが、バフ掛けを手作業で行う為、該検査が厄介であるという問題点や、バフ掛けの際に粉塵が発生してしまうという問題点がある。このバフ掛け等の表面調整を行う手段としては、ウエットブラスト処理する特許文献３が提案されている。更に前記ウエットブラストを化成処理の前処理として連続して行う方法として特許文献４が提案されている。
前記従来技術は、いずれも化成処理の前処理としてウエットブラストを用いる方法であり、工程数等は従来の化学処理を用いた処理と同等であり、コスト等の改善効果は小さい。また成形不良品は化成処理前に、パテ塗りによる補正が必要となり、歩留まり低下、コストアップの原因となっている。 Each of the conventional techniques is a method using wet blasting as a pretreatment for chemical conversion treatment, and the number of steps is the same as the treatment using conventional chemical treatment, and the effect of improving the cost and the like is small. Further, defective molding requires correction by putty coating before chemical conversion treatment, which causes a decrease in yield and an increase in cost.
本発明は、Ｍｇ合金からなる成形体の表面に、簡易に化成処理膜を形成し、パテ塗りによる補正を減らし、塗装の歩留まりを改善し、コストダウンが可能なＭｇ又はＭｇ合金筐体及びその製造方法を提供する。 The present invention provides a Mg or Mg alloy casing capable of easily forming a chemical conversion treatment film on the surface of a molded body made of Mg alloy, reducing correction by putty coating, improving coating yield, and reducing costs. A manufacturing method is provided.
本発明のＭｇ又はＭｇ合金筐体は、Ｍｇ又はＭｇ合金筐体表面を化成処理液と研磨材とを添加した液を使用してウエットブラスト処理することにより、Ｍｇ又はＭｇ合金筐体表面にリン酸カルシウム−リン酸マグネシウムの複合被膜からなる化成膜を形成したことを特徴とする。
Mg or Mg alloy housing of the present invention, by wet blasting using a solution obtained by adding and the Mg or Mg alloy casing surface a chemical conversion treatment liquid abrasive, calcium phosphate Mg or Mg alloy casing surface -A chemical film formed of a composite film of magnesium phosphate is formed.
本発明のＭｇ又はＭｇ合金筐体の製造方法は、Ｍｇ又はＭｇ合金の表面処理方法であって、Ｍｇ又はＭｇ合金表面にカルシウムイオン、マンガンイオン及びリン酸イオンを含む化成処理液と研磨材とを添加した液を使用してウエットブラスト処理することにより、Ｍｇ又はＭｇ合金筐体表面にブラストによる凹凸とリン酸カルシウム−リン酸マグネシウムの複合被膜からなる化成膜を同時に形成したことを特徴とする。
The manufacturing method of the Mg or Mg alloy casing of the present invention is a surface treatment method of Mg or Mg alloy , and a chemical conversion treatment liquid containing calcium ions, manganese ions and phosphate ions on the surface of Mg or Mg alloy, and an abrasive. By performing wet blasting using a solution to which is added, an uneven film formed by blasting and a composite film composed of a composite coating of calcium phosphate-magnesium phosphate are simultaneously formed on the surface of the Mg or Mg alloy casing.
本発明によれば、Ｍｇ又はＭｇ合金筐体表面に化成処理液と研磨材を添加した液をウエットブラスト処理し、Ｍｇ又はＭｇ合金筐体表面にブラストによる凹凸と化成膜を同時に形成することにより、化成処理膜を形成し、パテ塗りによる補修を減らし、歩留まり低下と、コストを改善できる。すなわち、化成処理液と研磨材の混合液をウエットブラストによりＭｇ又はＭｇ合金筐体表面に噴射すると、研磨剤により表面が削り取られると同時にＭｇと化成処理液とが反応により適度な膜厚でかつ緻密なリン酸カルシウム−リン酸マグネシウムの複合被膜が生成する。よって、Ｍｇ又はＭｇ合金筐体表面に裸耐食性、防錆性、塗膜密着性及び塗膜耐食性を劣化させる酸化物や水酸化物の膜を生成せずにカルシウム及びリンは化成膜の裸耐食性の向上、またマンガンは塗膜密着性の向上に寄与するリン酸カルシウム−リン酸マグネシウムの複合被膜ができる。更に化成品の表面の引け、ボイド、流れ等がなくなり、塗装前のパテ修正の必要がなく、コストダウンが可能となる。 According to the present invention, the surface of the Mg or Mg alloy casing is wet blasted with the chemical conversion solution and the liquid added with the abrasive, and the surface of the Mg or Mg alloy casing is unevenly formed and the film is formed simultaneously. Thus, it is possible to form a chemical conversion treatment film, reduce the repair by putty coating, reduce the yield, and improve the cost. In other words, when a mixture of the chemical conversion treatment liquid and the abrasive is sprayed onto the surface of the Mg or Mg alloy casing by wet blasting, the surface is scraped off by the abrasive and at the same time the Mg and the chemical conversion treatment liquid have an appropriate film thickness due to the reaction. A dense calcium phosphate-magnesium phosphate composite coating is produced. Therefore, calcium and phosphorus are formed on the surface of Mg or Mg alloy without forming an oxide or hydroxide film that degrades the bare corrosion resistance, rust prevention, coating film adhesion and coating film corrosion resistance. Improvement of corrosion resistance, and manganese can form a composite coating of calcium phosphate-magnesium phosphate that contributes to improvement of coating film adhesion. Furthermore, there is no shrinkage, voids, flow, etc. on the surface of the chemical product, so there is no need to correct putty before painting, and cost can be reduced.
本発明者らは上記の課題を解決する為に鋭意研究を行った結果、Ｍｇ又はＭｇ合金からなる筐体の例えば防錆処理、塗装の前処理として、Ｍｇ又はＭｇ合金に化成処理とウエットブラスト処理を同時にすることで、上記問題を解決する方法を見いだした。ここでウエットブラスト処理とは、液体と研磨剤を混合して０．１〜０．３ＭＰａの範囲の圧力で噴射する処理をいう。 As a result of diligent research to solve the above-mentioned problems, the inventors of the present invention have made Mg or Mg alloy a chemical conversion treatment and wet blasting as a pretreatment for, for example, rust prevention treatment and coating of a casing made of Mg or Mg alloy. We found a way to solve the above problem by processing at the same time. Here, the wet blast treatment refers to a treatment in which a liquid and an abrasive are mixed and sprayed at a pressure in the range of 0.1 to 0.3 MPa.
本発明で用いる化成液としてはカルシウムイオン、マンガンイオン及びリン酸イオンを含むことが好ましく、さらに酸化促進剤を含有する水性液剤とアルミナ等の研磨材を添加した液を用いてウエットブラスト処理することが好ましい。ウエットブラスト処理は、筐体の表面研磨と化成被膜を同時に行うのため、形成された被膜も研磨されるが、上記の条件を満たすことにより、十分な被膜を得ることができる。 The chemical conversion liquid used in the present invention preferably contains calcium ions, manganese ions and phosphate ions, and is further wet-blasted using a liquid in which an aqueous liquid containing an oxidation accelerator and an abrasive such as alumina are added. Is preferred. In the wet blast treatment, the surface polishing of the casing and the chemical conversion coating are simultaneously performed, so that the formed coating is also polished. However, a sufficient coating can be obtained by satisfying the above conditions.
前記研磨剤としては、アルミナ、ジルコニウム、ガラス及び樹脂から選ばれる少なくとも一つの粒子を用いるのが好ましい。また樹脂はメラミン樹脂、ユリア樹脂、ポリエステル樹脂、フェノール樹脂、エポキシ樹脂、ウレタン樹脂などを使用できる。研磨剤粒子の平均粒子径は、１０〜３００μｍの範囲が好ましい。 As the abrasive, it is preferable to use at least one particle selected from alumina, zirconium, glass and resin. As the resin, melamine resin, urea resin, polyester resin, phenol resin, epoxy resin, urethane resin and the like can be used. The average particle diameter of the abrasive particles is preferably in the range of 10 to 300 μm.
この噴射する化成処理液に用いるカルシウムイオン源として、硝酸カルシウム、亜硝酸カルシウム、チオ硫酸カルシウム、リン酸二水素カルシウム等の一種又は二種以上を配合することができる。また、マンガンイオン源として、炭酸マンガン、硝酸マンガン、リン酸水素マンガン、重リン酸マンガン、ホウフッ化マンガン等の一種又は二種以上を配合することができる。また、リン酸イオン源として、オルソリン酸、縮合リン酸、亜リン酸、次亜リン酸等の一種又は二種以上を配合することができる。 As a calcium ion source used for the chemical conversion treatment liquid to be sprayed, one or more of calcium nitrate, calcium nitrite, calcium thiosulfate, calcium dihydrogen phosphate and the like can be blended. Moreover, 1 type, or 2 or more types, such as manganese carbonate, manganese nitrate, manganese hydrogen phosphate, manganese biphosphate, manganese borofluoride, can be mix | blended as a manganese ion source. Moreover, 1 type, or 2 or more types, such as orthophosphoric acid, condensed phosphoric acid, phosphorous acid, hypophosphorous acid, can be mix | blended as a phosphate ion source.
また、酸化促進剤として、塩素酸ナトリウム、次亜塩素酸ナトリウム等を用いることができる。この酸化促進剤は、化成処理時に、Ｍｇ又はＭｇ合金と上記の各成分イオンとの反応性を高めて、裸耐食性等が良好な化成被膜を一層好都合に形成することができる。また、この酸化促進剤の好ましい配合量は、上記の性能の化成被膜を安定的に得るために、０．０２〜２ｇ／Ｌの範囲の割合である。 Moreover, sodium chlorate, sodium hypochlorite, etc. can be used as an oxidation accelerator. This oxidation accelerator can increase the reactivity between Mg or Mg alloy and each of the above component ions during the chemical conversion treatment, and more conveniently form a chemical conversion film having good bare corrosion resistance and the like. Moreover, the preferable compounding quantity of this oxidation accelerator is a ratio of the range of 0.02-2g / L, in order to obtain the chemical conversion film of said performance stably.
本発明においては、化成処理液と研磨材の混合液をウエットブラストによりＭｇ又はＭｇ合金表面に噴射すると、研磨剤により、表面が削られると同時にＭｇ又はＭｇと化成処理液とが反応により適度な膜厚で且つ緻密なリン酸カルシウム−リン酸マンガンの複合被膜が生成する。よって、Ｍｇ又はＭｇ表面に酸化物や水酸化物の膜を生成せずにリン酸カルシウム−リン酸マンガンの複合被膜ができる。前記化成処理によって形成される複合被膜の付着量は、Ｃａ重量で５ｍｇ／ｍ2以上５０ｍｇ／ｍ2以下、Ｍｎ重量で３ｍｇ／ｍ2以上２５ｍｇ／ｍ2以下、リン重量で３０ｍｇ／ｍ2以上１００ｍｇ／ｍ2以下であることが好ましい。 In the present invention, when the liquid mixture of the chemical conversion treatment liquid and the abrasive is sprayed onto the surface of the Mg or Mg alloy by wet blasting, the surface is scraped by the abrasive and at the same time, the Mg or Mg and the chemical conversion treatment liquid are appropriately reacted. A dense composite film of calcium phosphate-manganese phosphate with a film thickness is formed. Therefore, a composite coating of calcium phosphate-manganese phosphate can be formed without forming an oxide or hydroxide film on the Mg or Mg surface. Adhesion of the composite coating film formed by the chemical conversion treatment, Ca weight at 5 mg / m 2 or more 50 mg / m 2 or less, Mn weight at 3 mg / m 2 or more 25 mg / m 2 or less, phosphorus weight 30 mg / m 2 or more It is preferably 100 mg / m 2 or less.
また、化成処理液と研磨材の割合は、化成処理液７０〜９０質量％と研磨材１０〜３０質量％の範囲とすることが好ましい。 Moreover, it is preferable to make the ratio of a chemical conversion liquid and an abrasives into the range of 70-90 mass% of chemical conversion liquid, and 10-30 mass% of abrasives.
Ｍｇ又はＭｇ合金表面に上記した所定量のカルシウム、マンガン及びリンを含むように化成被膜が形成されることにより、一定の裸耐食性、防錆性、塗膜密着性及び塗膜耐食性を保持する化成被膜が得られる。特に、カルシウム及びリンは化成被膜の裸耐食性の向上、またマンガンは塗膜密着性の向上に寄与するものと考えられる。 By forming a chemical conversion coating on the surface of Mg or Mg alloy so as to contain the above-mentioned predetermined amounts of calcium, manganese and phosphorus, a chemical conversion that maintains a certain level of bare corrosion resistance, rust prevention, coating adhesion and coating corrosion resistance A film is obtained. In particular, calcium and phosphorus are considered to contribute to improving the bare corrosion resistance of the chemical conversion film, and manganese contributes to improving the adhesion of the coating film.
更に研磨剤によりＭｇ又はＭｇ表面は、研磨されることにより、Ｍｇ又はＭｇ筐体製造品の表面の引け、ボイド、流れ等がなくなり、塗装前のパテ修正の必要がなくコストダウンが可能となる。前記ウエットブラスト液に含まれる研磨剤の研磨作用により、Ｍｇ又はＭｇ合金筐体の表面粗度は、１０点平均表面粗さで０．５μｍ以上１００μｍ以下の範囲とするのが好ましい。 Further, by polishing the Mg or Mg surface with an abrasive, there is no shrinkage, voids, flow, etc. on the surface of the Mg or Mg housing manufactured product, and there is no need for putty correction before painting, and cost reduction is possible. . Due to the polishing action of the abrasive contained in the wet blast liquid, the surface roughness of the Mg or Mg alloy casing is preferably in the range of 0.5 μm to 100 μm in terms of 10-point average surface roughness.
上記の処理工程に引き続いて、水洗し、乾燥させるのが好ましい。また更にウエットブラスト処理、水洗後に、ウエットブラスト処理時に用いた化成処理液と同等のカルシウムイオン、マンガンイオン及びリン酸イオンを含み、さらに酸化促進剤を含有する水性液剤をシャワー噴射すると被膜膜厚を厚くすることができ、耐食性が向上する。 Subsequent to the above treatment step, it is preferable to wash with water and dry. Furthermore, after wet blasting and rinsing, the coating film thickness is reduced by shower spraying an aqueous solution containing calcium ions, manganese ions and phosphate ions equivalent to the chemical conversion treatment solution used during wet blasting, and further containing an oxidation accelerator. The thickness can be increased, and the corrosion resistance is improved.
その後、塗装処理を施すことができる。この塗装処理として、吹き付け塗装や電着塗装等の方法によりエポキシ樹脂等の塗料を下塗りし、更にこれにメラミン樹脂等の塗料を上塗りすることができる。その他にも、各種樹脂による粉体塗料を静電塗装することもできる。 Thereafter, a coating process can be performed. As this coating treatment, a paint such as an epoxy resin can be undercoated by a method such as spray coating or electrodeposition coating, and a paint such as a melamine resin can be further applied thereon. In addition, it is possible to electrostatically paint powder coatings made of various resins.
以下に、実施例及び比較例に基づいて本発明をさらに具体的に説明する。 Hereinafter, the present invention will be described more specifically based on examples and comparative examples.
（実施例１）
処理対象部材として、ＡＳＴＭ ＡＺ９１ＤのＭｇ又はＭｇ合金をチクソーモールディングして製作したノートパソコン筐体（横：３２９ｍｍ、縦：２７４ｍｍ、高さ：２ｍｍ）を用いた。チクソモールディングは、Ｍｇ又はＭｇ合金を半溶融又は溶融状態で約６００℃の押し出し機から約２５０℃の金型に押し出し成形した。表面処理工程を図１に示す。
(Example 1)
A notebook PC case (width: 329 mm, height: 274 mm, height: 2 mm) manufactured by Chixso molding of Mg or Mg alloy of ASTM AZ91D was used as a processing target member. In thixomolding, Mg or Mg alloy was extruded from an extruder at about 600 ° C. into a mold at about 250 ° C. in a semi-molten or molten state. The surface treatment process is shown in FIG.
化成処理液として"グランダファイナーＭＣ１０００"（ミリオン化学株式会社製製品名、リン酸１５〜２５質量％、マンガン化合物１０〜１５質量％、カルシウム化合物１０〜２０質量％）を含む水溶液８０質量％と、研磨剤として平均粒径４０μｍのアルミナ（マコー（株）製、マコランダムＡ＃３２０）を２０質量％混合して用いた。ウエットブラストは、マコー製ラムダを使用し、圧縮エアー圧は０．２ＭＰａ、ポンプ圧を０．１２ＭＰａとし、筐体とノズルの距離を３０ｍｍとして、筐体を４０ｍｍ／ｓで順送りした。化成処理液、研磨剤除去のため水洗し、更に脱イオン水で水洗し、その後乾燥させた。 80% by mass of an aqueous solution containing “Grandafiner MC1000” (product name, manufactured by Million Chemical Co., Ltd., phosphoric acid 15 to 25% by mass, manganese compound 10 to 15% by mass, calcium compound 10 to 20% by mass) as a chemical conversion treatment liquid; As an abrasive, 20% by mass of alumina having an average particle diameter of 40 μm (Mako Co., Ltd., Macorundum A # 320) was mixed and used. As the wet blast, a Macau lambda was used, the compressed air pressure was 0.2 MPa, the pump pressure was 0.12 MPa, the distance between the casing and the nozzle was 30 mm, and the casing was sequentially fed at 40 mm / s. It was washed with water to remove the chemical conversion treatment liquid and the abrasive, further washed with deionized water, and then dried.
（比較例１）
比較例として、エッチング後、化成処理を行う工程を図２に示す。図２の表面調整１〜２はエッチング処理を示す。
(Comparative Example 1)
As a comparative example, FIG. 2 shows a process of chemical conversion after etching. Surface adjustments 1 and 2 in FIG. 2 indicate an etching process.
脱脂剤として"ＧＦＭＧ１５ＳＸ"（ミリオン化学株式会社社製商品名）用い、その液温を７０℃に保持し、その中に全記のＭｇ又はＭｇ合金筐体を５分間浸漬して脱脂処理し、その後水洗した。エッチング剤として"グランダファイナーＭＧ１０４Ｓ"（ミリオン化学株式会社製商品名、リン酸３０〜４０質量％、界面活性剤０．１質量％未満、残部水）を濃度５％、液温度６０℃に保持し、６０秒間浸漬してエッチング処理し、その後水洗した。その後、このエッチング処理した部材を、液温６０℃に保持した前記"ＧＦＭＧ１５ＳＸ"（ミリオン化学株式会社製商品名）に７分間浸漬して処理し、その後水洗した。化成処理液として"グランダファイナーＭＣ１０００"（ミリオン化学株式会社製商品名、リン酸１５〜２５質量％、マンガン化合物１０〜１５質量％、カルシウム化合物１０〜２０質量％）を用い、３５℃に保持してその中に上記のように処理したＭｇ又はＭｇ合金筐体を４０秒間浸漬して化成処理し、水洗し、更に脱イオン水で水洗し、その後乾燥させた。 Using “GFMG15SX” (trade name, manufactured by Million Chemical Co., Ltd.) as a degreasing agent, maintaining the liquid temperature at 70 ° C., immersing the Mg or Mg alloy casing described above for 5 minutes in the degreasing treatment, Thereafter, it was washed with water. "Grandafiner MG104S" (trade name, manufactured by Million Chemical Co., Ltd., phosphoric acid 30 to 40% by mass, surfactant less than 0.1% by mass, remaining water) is maintained at a concentration of 5% and a liquid temperature of 60 ° C as an etching agent. The film was immersed for 60 seconds for etching, and then washed with water. Thereafter, the etched member was immersed in the “GFMG15SX” (trade name, manufactured by Million Chemical Co., Ltd.) maintained at a liquid temperature of 60 ° C. for 7 minutes, and then washed with water. “Grandafiner MC1000” (trade name, manufactured by Million Chemical Co., Ltd., phosphoric acid 15 to 25% by mass, manganese compound 10 to 15% by mass, calcium compound 10 to 20% by mass) is used as a chemical conversion treatment liquid and maintained at 35 ° C. The Mg or Mg alloy case treated as described above was immersed for 40 seconds for chemical conversion treatment, washed with water, further washed with deionized water, and then dried.
実施例１及び比較例１について、外観評価し、またＭｇ又はＭｇ合金筐体表面の元素付着量は蛍光Ｘ線による定量方法により測定した。筐体表面の５カ所を想定し、そのバラツキを調べた。電気抵抗率は、（株）ダイアインストルメント社製の"ロレスターＭＰ"（４端子２探針方式）で測定した。この結果を表１と図３〜４に示す。図３は比較例１の外観を示す写真であり、図４は実施例１の外観を示す写真である。実施例１の外観は均一表面であったが、比較例１の外観はムラが見られた。 The appearance of Example 1 and Comparative Example 1 were evaluated, and the amount of element adhesion on the surface of the Mg or Mg alloy casing was measured by a quantitative method using fluorescent X-rays. Assuming five locations on the surface of the housing, the variation was investigated. The electrical resistivity was measured by “Lorestar MP” (4-terminal 2-probe method) manufactured by Dia Instruments Co., Ltd. The results are shown in Table 1 and FIGS. FIG. 3 is a photograph showing the appearance of Comparative Example 1, and FIG. 4 is a photograph showing the appearance of Example 1. The appearance of Example 1 was a uniform surface, but the appearance of Comparative Example 1 was uneven.
更にＭｇ又はＭｇ合金筐体にエポキシ系の２コート塗装（焼き付け １５０℃）を、高温高湿環境（６０℃、相対湿度９５％ＲＨ）に１００時間保持後、クロスカット試験（試料表面に碁盤目模様を描いて１００個の部分に区分し、テープアップ後の格子残存数を計数し、次の基準により判断した。つまり、その残存数が１００のとき合格、それ未満のとき不合格とする）とした。 In addition, a two-coat epoxy coating (baked at 150 ° C) on the Mg or Mg alloy housing was held in a high-temperature, high-humidity environment (60 ° C, relative humidity of 95% RH) for 100 hours, followed by a cross-cut test (a grid pattern on the sample surface). Draw a pattern and divide it into 100 parts, count the number of remaining lattices after tape-up, and judge according to the following criteria: That is, when the remaining number is 100, it passes, and when it is less, it is rejected It was.
この結果を実施例１については図５Ａ−Ｃの外観写真に示し、また比較例１については図６Ａ−Ｃの外観写真に示す。図５〜６において、「ＯＨ」はテスト前、「２ｍｍ」と「１ｍｍ」はそれぞれ碁盤目の大きさを示す。 The results are shown in the appearance photograph of FIGS. 5A-C for Example 1, and the appearance photograph of FIGS. 6A-C for Comparative Example 1. 5 to 6, “OH” indicates a size before the test, and “2 mm” and “1 mm” indicate the size of the grid, respectively.
更にＪＩＳ Ｚ ２３７１に従った塩水噴霧試験（ＳＳＴ）を８時間と２４時間行い、耐食性を評価した。この結果を実施例１については図７Ａ−Ｃの外観写真に示し、また比較例１については図８Ａ−Ｃの外観写真に示す。図７〜８において、「ＯＨ」はテスト前、「８Ｈ」と「２４Ｈ」はそれぞれ試験処理時間を示す。 Further, a salt spray test (SST) according to JIS Z 2371 was conducted for 8 hours and 24 hours to evaluate the corrosion resistance. The results are shown in the appearance photograph of FIGS. 7A-C for Example 1, and the appearance photograph of FIGS. 8A-C for Comparative Example 1. 7 to 8, “OH” indicates a pre-test time, and “8H” and “24H” indicate test processing times, respectively.
以上の結果から、実施例１は比較例１に比べて、均一な色調が得られ、平滑であることが確認できた。更に、成形品表面の引け、ボイド、流れ等がなくなった。これにより、処理後に行う塗装の歩留まりが向上し、塗装前のパテ等の補修も必要ないため、コストダウンになった。 From the above results, it was confirmed that Example 1 obtained a uniform color tone and was smooth as compared with Comparative Example 1. Furthermore, there was no shrinkage, voids, flow, etc. on the surface of the molded product. As a result, the yield of the coating performed after the treatment is improved, and it is not necessary to repair the putty before coating, thereby reducing the cost.
実施例１は、被膜付着量は比較例と比較して少ない物のバラツキが小さかった。その他の被膜特性である抵抗、塗装性、耐食性は、実施例と比較例で同等の値を示した。 In Example 1, the amount of coating adhered was small compared to the comparative example. Other film properties, such as resistance, paintability, and corrosion resistance, showed the same values in the examples and comparative examples.
更に実施例１は、全体の工程数が少ないため、簡易に被膜処理が可能であり、コストダウンできる。 Further, in Example 1, since the total number of steps is small, coating treatment can be easily performed, and the cost can be reduced.
Claims (5)
Ｍｇ又はＭｇ合金表面にカルシウムイオン、マンガンイオン及びリン酸イオンを含む化成処理液と研磨材とを添加した液を使用してウエットブラスト処理することにより、Ｍｇ又はＭｇ合金筐体表面にブラストによる凹凸とリン酸カルシウム−リン酸マグネシウムを含む複合被膜からなる化成膜を同時に形成したことを特徴とするＭｇ又はＭｇ合金筐体の製造方法。 A surface treatment method of Mg or Mg alloy,
Unevenness due to blasting on the Mg or Mg alloy housing surface by wet blasting using a solution obtained by adding a chemical conversion treatment solution containing calcium ions, manganese ions and phosphate ions to the Mg or Mg alloy surface and an abrasive. A method for producing a Mg or Mg alloy casing, wherein a chemical film formed of a composite coating containing calcium phosphate-magnesium phosphate and magnesium phosphate is simultaneously formed.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004264400A JP4124761B2 (en) | 2004-09-10 | 2004-09-10 | Mg or Mg alloy casing and manufacturing method thereof |
| TW093138725A TWI285580B (en) | 2004-09-10 | 2004-12-14 | Mg or Mg-alloy housing and method for producing the same |
| US11/012,144 US20060054249A1 (en) | 2004-09-10 | 2004-12-16 | Mg or Mg-alloy housing and method for producing the same |
| KR1020040112677A KR100613157B1 (en) | 2004-09-10 | 2004-12-27 | Mg OR Mg-ALLOY HOUSING AND METHOD FOR PRODUCING THE SAME |
| CN200410082173.9A CN1745971B (en) | 2004-09-10 | 2004-12-31 | Mg or Mg-alloy housing and method for producing the same |
| US12/484,746 US20090250142A1 (en) | 2004-09-10 | 2009-06-15 | Mg or Mg-Alloy Housing and Method for Producing the Same |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004264400A JP4124761B2 (en) | 2004-09-10 | 2004-09-10 | Mg or Mg alloy casing and manufacturing method thereof |
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| JP2006077304A JP2006077304A (en) | 2006-03-23 |
| JP4124761B2 true JP4124761B2 (en) | 2008-07-23 |
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| US (2) | US20060054249A1 (en) |
| JP (1) | JP4124761B2 (en) |
| KR (1) | KR100613157B1 (en) |
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| JP4924612B2 (en) | 2006-10-31 | 2012-04-25 | 富士通株式会社 | Electronic device casing and manufacturing method thereof |
| CN101373651B (en) * | 2007-08-23 | 2011-12-07 | 北京中科三环高技术股份有限公司 | Surface pretreating method of wet method spray sand type neodymium iron boron permanent magnetic material |
| CN102463501A (en) * | 2010-11-18 | 2012-05-23 | 神基科技股份有限公司 | Surface processing method for magnesium alloy object and structure thereof |
| TWI448570B (en) * | 2010-11-29 | 2014-08-11 | Hon Hai Prec Ind Co Ltd | Articles and method for making the same |
| CN104233247B (en) * | 2014-07-21 | 2016-08-24 | 上海翔圣化工有限公司 | High anti-corrosion low resistance magnesium alloy passivating solution |
| CN104959564A (en) * | 2014-11-28 | 2015-10-07 | 东莞市晋益电子科技有限公司 | Method for manufacturing bimetallic seamless plastic insert casting piece |
| US20180155846A1 (en) * | 2015-07-28 | 2018-06-07 | Hewlett-Packard Development Company, L.P. | Magnesium Alloy Substrate |
| WO2017219372A1 (en) * | 2016-06-24 | 2017-12-28 | 深圳市恒兆智科技有限公司 | Zinc-manganese series phosphating agent, metal piece and surface phosphating treatment method therefor |
| WO2017219368A1 (en) * | 2016-06-24 | 2017-12-28 | 深圳市恒兆智科技有限公司 | Manganese series phosphating agent, metal piece and surface phosphating treatment method therefor |
| CN109605227A (en) * | 2018-11-23 | 2019-04-12 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of minimizing technology of inorganic sealant after metal surface worst hot case |
| CN110205618B (en) * | 2019-07-10 | 2021-11-26 | 福建坤孚股份有限公司 | Method for preparing high-hardness film layer on surface of magnesium alloy in short process |
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| US5681205A (en) * | 1993-08-12 | 1997-10-28 | Church & Dwight Co., Inc. | Method of using abrasive blast media containing corrosion inhibitor |
| JP4195735B2 (en) | 1997-08-12 | 2008-12-10 | マコー株式会社 | Pre-treatment method for resin component joint surface of electronic parts |
| JP4177510B2 (en) | 1999-03-19 | 2008-11-05 | マコー株式会社 | Method for processing magnesium products |
| JP2001212760A (en) | 2000-02-01 | 2001-08-07 | Tokai Rika Co Ltd | Design face forming method for metallic material |
| JP4873438B2 (en) | 2001-07-02 | 2012-02-08 | 株式会社日本製鋼所 | Method for surface treatment of magnesium molded body |
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| US20090250142A1 (en) | 2009-10-08 |
| JP2006077304A (en) | 2006-03-23 |
| TW200609082A (en) | 2006-03-16 |
| KR100613157B1 (en) | 2006-08-17 |
| CN1745971B (en) | 2010-05-05 |
| US20060054249A1 (en) | 2006-03-16 |
| TWI285580B (en) | 2007-08-21 |
| CN1745971A (en) | 2006-03-15 |
| KR20060023929A (en) | 2006-03-15 |
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