JPH04308099A - Surface treatment for aluminum or aluminum alloy - Google Patents
Surface treatment for aluminum or aluminum alloyInfo
- Publication number
- JPH04308099A JPH04308099A JP7168191A JP7168191A JPH04308099A JP H04308099 A JPH04308099 A JP H04308099A JP 7168191 A JP7168191 A JP 7168191A JP 7168191 A JP7168191 A JP 7168191A JP H04308099 A JPH04308099 A JP H04308099A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- surface treatment
- alloy
- oxide film
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 55
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 10
- 238000004381 surface treatment Methods 0.000 title claims description 24
- 238000000034 method Methods 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 239000000956 alloy Substances 0.000 claims description 24
- 239000010407 anodic oxide Substances 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000007796 conventional method Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 claims description 3
- 229910000367 silver sulfate Inorganic materials 0.000 claims description 3
- 238000004040 coloring Methods 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract 3
- 238000007254 oxidation reaction Methods 0.000 abstract 3
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 abstract 2
- 230000001473 noxious effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- 238000000576 coating method Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001879 copper Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WXHLLJAMBQLULT-UHFFFAOYSA-N 2-[[6-[4-(2-hydroxyethyl)piperazin-1-yl]-2-methylpyrimidin-4-yl]amino]-n-(2-methyl-6-sulfanylphenyl)-1,3-thiazole-5-carboxamide;hydrate Chemical compound O.C=1C(N2CCN(CCO)CC2)=NC(C)=NC=1NC(S1)=NC=C1C(=O)NC1=C(C)C=CC=C1S WXHLLJAMBQLULT-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 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
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、アルミニウム又はその
合金の表面処理方法の改良に関し、軸受、歯車、スピン
ドル、弁、ピストン、建具、インテリア及びエクステリ
ア用品、文房具、アクセサリ等々のほか、コンピュータ
やビデオレコーダ等の磁気テープの接触部品の表面処理
として、極めて広範囲の分野で好適に利用できる表面処
理方法に関する。[Industrial Application Field] The present invention relates to improvements in surface treatment methods for aluminum or its alloys, and relates to bearings, gears, spindles, valves, pistons, fittings, interior and exterior goods, stationery, accessories, etc., as well as computers and video cameras. The present invention relates to a surface treatment method that can be suitably used in a very wide range of fields as a surface treatment for contact parts of magnetic tapes such as recorders.
【０００２】0002
【従来の技術】アルミニウム又はその合金を硝酸、硫酸
、クロム酸水溶液系等の電解浴液中で陽極酸化して耐蝕
性酸化被膜を形成する方法は、アルマイト処理として公
知であり航空機を始めとし、自動車、船舶、光学機器、
化学工業機器等から鍋、やかん等の日用品まで各種分野
で広く使用されている。然しながら、アルマイト被膜の
上層は一般に多孔質であり、耐蝕性等を向上させるため
には沸騰水等に浸漬する等の各種の封孔（シーリング）
処理を施す必要がある。BACKGROUND OF THE INVENTION A method of anodizing aluminum or its alloys in an electrolyte solution such as nitric acid, sulfuric acid, or chromic acid aqueous solution to form a corrosion-resistant oxide film is known as alumite treatment, and is used in applications such as aircraft, etc. automobiles, ships, optical equipment,
It is widely used in a variety of fields, from chemical industrial equipment to daily necessities such as pots and kettles. However, the upper layer of the alumite coating is generally porous, and in order to improve its corrosion resistance, various sealing methods such as immersion in boiling water, etc. are required.
It is necessary to carry out processing.
【０００３】また、アルマイト被膜は一般に銀白色であ
るため、建築材料、日用品等の如く彩色されたものが望
ましい場合には、アルマイトの多孔質層内に染料や顔料
を含浸させる着色処理を施す必要がある。また、硫酸に
スルホサリチル酸等を加えた電解浴を用いて電解により
自然発色被膜を形成する方法も採用されているが、いず
れもアルマイト被膜上層の浅い領域のみが着色するだけ
で、摩耗、変色し易く、またそれより深い部分は依然と
して多孔質のまゝであるので、耐久性等も必ずしも充分
ではなかった。[0003]Also, since alumite coatings are generally silvery white, if a colored product is desired, such as for building materials or daily necessities, it is necessary to carry out a coloring process to impregnate the porous layer of alumite with dyes or pigments. There is. In addition, a method of forming a naturally colored film by electrolysis using an electrolytic bath containing sulfosalicylic acid, etc. in sulfuric acid has been adopted, but in either case, only a shallow area of the upper layer of the alumite film is colored, and there is no risk of wear and discoloration. However, since the deeper part remains porous, the durability is not necessarily sufficient.
【０００４】このような問題点を解決するため、本願出
願人は先に平成１年特許願第１２０４６９号において、
常法によりアルミニウム又はアルミニウム合金の表面に
陽極酸化被膜を形成する工程と、上記工程により陽極酸
化被膜を形成した部材に、所望の金属の硫酸塩溶液又は
硝酸塩溶液中で１０ないし３０Ｖの交流電圧を加えてそ
の金属を陽極酸化被膜中に電解含滲せしめる工程と、か
ら成るアルミニウム又はその合金の表面処理方法を開示
した。当該方法によれば、アルミニウム又はその合金の
地金上に形成された多孔性酸化被膜内に、電解浴液中の
金属が深く侵入し、酸化アルミと複合して強固かつ緻密
な複合被膜を形成するため、耐候性、耐蝕性、耐熱性、
耐摩耗性等が向上すると共に、電解浴液中の金属の種類
やその侵入深さに応じて様々な着色をなし得るものであ
る。[0004] In order to solve such problems, the applicant of the present application previously proposed in Patent Application No. 120469 of 1999,
A step of forming an anodic oxide film on the surface of aluminum or an aluminum alloy by a conventional method, and applying an AC voltage of 10 to 30 V in a sulfate solution or nitrate solution of the desired metal to the member on which the anodic oxide film has been formed by the above step. Additionally, a method for surface treatment of aluminum or its alloy is disclosed, which comprises the step of electrolytically impregnating the metal into an anodic oxide film. According to this method, the metal in the electrolytic bath penetrates deeply into the porous oxide film formed on the base metal of aluminum or its alloy, and combines with aluminum oxide to form a strong and dense composite film. Therefore, it has weather resistance, corrosion resistance, heat resistance,
In addition to improving wear resistance, it can be colored in various colors depending on the type of metal in the electrolytic bath and the depth of its penetration.
【０００５】然しながら、上記の方法において、被処理
体であるアルミニウム又はその合金から成る部材を浴液
中に保持し、通電する治具の材質が不適切であると、こ
れが浴液中に溶け出して所期の金属と一緒に多孔性酸化
被膜内に含滲し所期の着色が行なわれなかったり、被処
理体よりも治具の側に優先的に所期の金属が電着したり
するという不都合があった。[0005] However, in the above method, if the material of the jig that holds the object to be treated, which is made of aluminum or its alloy, in the bath liquid and energizes it is inappropriate, it may dissolve into the bath liquid. The intended metal may be impregnated into the porous oxide film and the desired coloration may not be achieved, or the intended metal may be preferentially electrodeposited on the jig side rather than on the object to be treated. There was this inconvenience.
【０００６】[0006]
【発明が解決しようとする課題】本発明は叙上の問題点
を解決するためなされたものであって、その目的とする
ところは、所期の着色が効率良く行なわれ、耐蝕性、耐
摩耗性が良好で、処理のためにシアン等の有毒物質を使
用しない等々、多くの利点を有するアルミニウム又はそ
の合金の表面処理方法を提供することにある。[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to efficiently achieve the desired coloring and to provide corrosion and abrasion resistance. The object of the present invention is to provide a method for surface treatment of aluminum or its alloy, which has many advantages such as good properties and no use of toxic substances such as cyanide for treatment.
【０００７】[0007]
【課題を解決するための手段】上記の目的は、常法によ
りアルミニウム又はアルミニウム合金の表面に陽極酸化
被膜を形成する工程と、上記工程により陽極酸化被膜を
形成した部材に、所望の金属の硫酸塩溶液又は硝酸塩溶
液中で１０ないし３０Ｖの交流電圧を加えてその金属を
陽極酸化被膜中に電解含滲せしめる工程とから成るアル
ミニウム又はその合金の表面処理方法において、処理を
施すべき上記アルミニウム又はアルミニウム合金から成
る部材を上記電解浴液中に保持し、通電する治具として
アルミニウム製のものを使用することを特徴とするアル
ミニウム又はその合金の表面処理方法によって達成し得
る。[Means for Solving the Problems] The above object is to form an anodic oxide film on the surface of aluminum or an aluminum alloy by a conventional method, and to apply sulfuric acid of a desired metal to the member on which the anodic oxide film has been formed by the above process. The above-mentioned aluminum or aluminum to be treated in a method for surface treatment of aluminum or its alloy, which comprises a step of electrolytically impregnating the metal into an anodic oxide film by applying an alternating current voltage of 10 to 30 V in a salt solution or nitrate solution. This can be achieved by a method for surface treatment of aluminum or its alloy, which comprises holding a member made of the alloy in the electrolytic bath and using an aluminum jig as a jig for energizing.
【０００８】上記電解浴液の組成は、金属塩１０〜２５
ｇ／リットル、ホウ酸２５〜３０ｇ／リットル、硫酸又
は硝酸 ０．３〜０．５ｇ／リットルとすることが推奨
され、また処理温度は５〜２０℃、交流電圧は１０〜３
０Ｖとすることが推奨される。上記金属塩としては、銀
の塩が最も有用である。また、上記陽極酸化被膜は、常
法により形成したアルマイト被膜であってもよいし、或
いはまた、本願出願人が特願昭６１−２５１９１４号や
特願昭６３−２４９１４７号において開示した如く、陽
極で重合する低重合アクリル樹脂組成物を含む電解浴液
を用い、低温で被処理体を陽極として通電することによ
って形成されたアクリル樹脂組成物と複合した陽極酸化
被膜に対しても適用することができる。[0008] The composition of the electrolytic bath solution is 10 to 25 metal salts.
g/liter, boric acid 25-30g/liter, sulfuric acid or nitric acid 0.3-0.5g/liter, treatment temperature 5-20℃, AC voltage 10-3
It is recommended to set it to 0V. As the metal salt, silver salt is most useful. Further, the anodic oxide film may be an alumite film formed by a conventional method, or alternatively, as disclosed by the applicant in Japanese Patent Application No. 61-251914 and Japanese Patent Application No. 63-249147, It can also be applied to an anodic oxide film composited with an acrylic resin composition formed by using an electrolytic bath solution containing a low-polymerized acrylic resin composition that polymerizes at low temperatures and applying electricity to the object to be treated as an anode. can.
【０００９】[0009]
【作用】叙上の如き方法によれば、アルミニウム又はそ
の合金の地金上に形成された多孔性酸化被膜内に、電解
浴液中の金属が深く侵入し、酸化アルミと複合して強固
かつ緻密な複合被膜を形成し、耐候性、耐蝕性、耐熱性
、耐摩耗性等が向上すると共に、アルミニウム製治具の
一部が浴液に溶け出して被処理体に電着しても被処理体
自体がアルミニウムであるため問題はなく、更にまた、
治具にのみ優先的に浴液中の金属イオンが電着されると
いうこともないため、電解浴液中の金属の種類やその侵
入深さに応じて所期の着色処理を効率良くなし得るもの
である。従って、本発明に係る表面処理方法は、軸受、
歯車、スピンドル、弁、ピストン、建具、インテリア及
びエクステリア用品、文房具、アクセサリ等々のほか、
コンピュータやビデオレコーダ等の磁気テープの接触部
品の表面処理として、極めて広範囲の分野で好適に利用
し得るものである。[Operation] According to the method described above, the metal in the electrolytic bath penetrates deeply into the porous oxide film formed on the base metal of aluminum or its alloy, and becomes strong and strong when combined with aluminum oxide. Forms a dense composite film that improves weather resistance, corrosion resistance, heat resistance, abrasion resistance, etc., and prevents it from being exposed even if some of the aluminum jig dissolves into the bath liquid and is electrodeposited on the workpiece. There is no problem because the processing body itself is aluminum, and furthermore,
Since the metal ions in the bath solution are not preferentially electrodeposited only on the jig, the desired coloring process can be carried out efficiently depending on the type of metal in the electrolytic bath solution and the depth of its penetration. It is something. Therefore, the surface treatment method according to the present invention includes bearings,
In addition to gears, spindles, valves, pistons, fittings, interior and exterior goods, stationery, accessories, etc.
It can be suitably used in a very wide range of fields as a surface treatment for contact parts of magnetic tapes in computers, video recorders, etc.
【００１０】0010
【実施例】以下、図面を参照しつゝ本発明を具体的に説
明する。図１は本発明にかゝるアルミニウム又はその合
金の表面処理方法を実施する装置の一実施例の概略を示
す説明図、図２は本発明方法により処理されたアルミニ
ウム又はアルミニウム合金の被膜部分の拡大断面図であ
る。図１中、１は電解槽、２は交流電源、３はその表面
に常法によりアルマイト被膜を形成したアルミニウム部
材、４，４はカーボン、グラファイト等の電極、５は所
望の金属塩を含む電解浴液、６はアルミニウム部材４を
電解浴液中に保持し、通電するアルミニウム製の治具で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an outline of an embodiment of an apparatus for carrying out the method for surface treatment of aluminum or its alloy according to the present invention, and FIG. It is an enlarged sectional view. In Fig. 1, 1 is an electrolytic cell, 2 is an AC power source, 3 is an aluminum member with an alumite film formed on its surface by a conventional method, 4 is an electrode made of carbon, graphite, etc., and 5 is an electrolytic cell containing a desired metal salt. The bath liquid 6 is an aluminum jig that holds the aluminum member 4 in the electrolytic bath liquid and applies electricity.
【００１１】処理すべきアルミニウム部材３の表面には
常法により厚さ５０〜１００ μｍ程度のアルマイト処
理が施してある。アルミニウム部材３に二次処理により
金色の表面着色を施す場合には電解浴液５中の金属塩と
して例えば銀の塩を使用するものであり、その場合の電
解浴液５の組成は、例えば、
硫酸銀────────１０〜２５ｇ／リットルホウ酸
────────２５〜３０ｇ／リットル硫酸────
─────０．３ 〜０．５ ｇ／リットル残部───
──────水
とするものである。又、上記電解浴液に、更に次の二成
分を加えることも推奨される。
Ｄ−酒石酸──────１５〜２５ｇ／リットル硫酸ニ
ッケル─────１５〜２５ｇ／リットルThe surface of the aluminum member 3 to be treated is anodized to a thickness of about 50 to 100 μm by a conventional method. When the aluminum member 3 is given a golden surface coloring by secondary treatment, for example, a silver salt is used as the metal salt in the electrolytic bath solution 5, and the composition of the electrolytic bath solution 5 in that case is, for example, as follows. Silver sulfate────────10-25g/liter boric acid────────25-30g/liter sulfuric acid────
─────0.3 ~0.5 g/liter remainder────
──────It is meant to be water. It is also recommended to further add the following two components to the electrolytic bath solution. D-Tartaric acid------15~25g/liter Nickel sulfate------15~25g/liter
【００１２】
交流電源２の電圧は１０〜３０Ｖ、望ましくは１５〜２
５Ｖとし、電解浴液の温度は５〜２０℃、望ましくは１
０〜１５℃とする。処理の進行に伴う銀イオン濃度の低
下は硫酸銀の補充によって補う。電圧が１０Ｖ以下であ
ると処理効率が悪く、また３０Ｖ以上であると金属の沈
着が急激に行なわれてアルマイトの多孔質層内への充分
な含滲が行なわれず、色むらや剥離を生じ易い。同様に
、電解浴液の温度が５〜１０℃以下であると処理効率が
悪く、１５〜２０℃以上になると色むらを生じ易い。ホ
ウ酸は主に電解浴液の電導度の調整のために添加される
。0012
The voltage of the AC power supply 2 is 10 to 30V, preferably 15 to 2V.
5V, and the temperature of the electrolyte bath is 5 to 20°C, preferably 1
The temperature shall be 0 to 15°C. The decrease in silver ion concentration as the process progresses is compensated for by supplementing with silver sulfate. If the voltage is less than 10V, the processing efficiency will be poor, and if it is more than 30V, the metal will be deposited rapidly, and the porous layer of alumite will not be sufficiently impregnated, resulting in uneven color and peeling. . Similarly, if the temperature of the electrolytic bath solution is 5 to 10°C or lower, processing efficiency is poor, and if it is 15 to 20°C or higher, color unevenness tends to occur. Boric acid is added mainly to adjust the conductivity of the electrolytic bath solution.
【００１３】而して、本発明においては、処理すべきア
ルミニウム部材３をアルミニウム製の治具６により電解
浴液５中に保持し、治具６を通じて通電を行なうように
したから、治具６の一部が浴液に溶け出してアルミニウ
ム部材３に電着しても被処理体自体がアルミニウムであ
るため問題はなく、更にまた、治具にのみ優先的に浴液
中の金属イオンが電着されるということもないため、電
解浴液中の銀塩による所期の着色処理を効率良くなし得
るものである。According to the present invention, the aluminum member 3 to be treated is held in the electrolyte bath 5 by the aluminum jig 6, and electricity is applied through the jig 6. Even if a part of the metal ions dissolve into the bath liquid and electrodeposit on the aluminum member 3, there is no problem because the object to be processed itself is aluminum.Furthermore, metal ions in the bath liquid are preferentially applied only to the jig. Since there is no possibility of coloring, the desired coloring treatment using the silver salt in the electrolytic bath solution can be carried out efficiently.
【００１４】上記二次処理により得られた複合陽極酸化
被膜を図２の表皮部分拡大断面図を用いて説明する。図
２中、２１はアルミニウム部材３の地金部、２２はアル
マイト処理により形成された陽極酸化被膜、２３はその
バリヤー層、２４は多孔性被膜部、２５は上記金属塩を
含む電解浴液を用いた二次処理により多孔性被膜部２４
中に含滲せしめられた金属である。而して、アルマイト
処理による陽極酸化被膜２２は通常バリヤー層２３と多
孔性被膜部２４とから成り、このような陽極酸化被膜を
形成したアルミニウム部材に上記の如き二次電解処理を
施すことによって、多孔性被膜部２４内に電解浴液５中
の銀等の金属分子が深く含滲せしめられ、強固、且つ緻
密な複合被膜が形成されるものである。[0014] The composite anodic oxide coating obtained by the above secondary treatment will be explained using the enlarged cross-sectional view of a part of the skin shown in FIG. In FIG. 2, 21 is the bare metal part of the aluminum member 3, 22 is the anodized coating formed by alumite treatment, 23 is its barrier layer, 24 is the porous coating part, and 25 is the electrolytic bath solution containing the above metal salt. Porous coating portion 24 is formed by the secondary treatment used.
It is metal impregnated inside. The anodic oxide film 22 formed by alumite treatment usually consists of a barrier layer 23 and a porous film portion 24, and by subjecting the aluminum member on which such an anodic oxide film has been formed to the secondary electrolytic treatment as described above, Metal molecules such as silver in the electrolytic bath solution 5 are deeply impregnated into the porous film portion 24, forming a strong and dense composite film.
【００１５】電解浴液５に用いる金属塩としては、上記
銀塩以外に銅塩、鉄塩等の他の金属塩を用いることもで
き、場合によっては金塩を用いることもできる。いずれ
の場合にも、金属塩１５ｇ／リットル前後を含む上記と
同様の電解浴液組成とするのが好適である。銀塩の場合
には前記の如く金色の被膜が形成され、銅塩の場合には
褐色若しくはブロンズ色の被膜が形成される。特に、銀
塩を用いた場合、製品の表面の摩擦係数が低く、美麗な
金色となり、耐摩耗性も高い等々、多くの利点を有する
ため、最も好適に利用できる。被膜の色は使用する金属
塩の種類によって変化させることができるほか、その厚
さ、即ち初期のアルマイト層の厚さや二次電解時間等に
よっても変化させることができる。As the metal salt used in the electrolytic bath solution 5, in addition to the silver salts mentioned above, other metal salts such as copper salts and iron salts can be used, and in some cases, gold salts can also be used. In either case, it is preferable to have the same electrolytic bath composition as above, containing around 15 g/liter of metal salt. In the case of silver salt, a golden coating is formed as described above, and in the case of copper salt, a brown or bronze coating is formed. In particular, when silver salt is used, it has many advantages such as a low coefficient of friction on the surface of the product, a beautiful golden color, and high wear resistance, so it can be used most preferably. The color of the film can be changed not only by the type of metal salt used, but also by its thickness, that is, the thickness of the initial alumite layer, the secondary electrolysis time, etc.
【００１６】なお、上記二次電解処理に先立つアルミニ
ウム部材表面への陽極酸化被膜の形成手段としては、常
法によるアルマイト処理のほか、本願出願人が特願昭６
１−２５１９１４号や特願昭６３−２４９１４７号にお
いて開示したアクリル樹脂組成物と複合した陽極酸化被
膜の形成手段も好適に採用することができる。[0016] As a means of forming an anodic oxide film on the surface of the aluminum member prior to the above-mentioned secondary electrolytic treatment, in addition to the alumite treatment by a conventional method, the applicant of the present application has
1-251914 and Japanese Patent Application No. 63-249147 can also be suitably employed.
【００１７】[0017]
【発明の効果】本発明は叙上の如く構成されるから、本
発明によるときには、アルミニウム又はその合金の地金
上に形成された多孔性酸化被膜内に、電解浴液中の金属
が深く侵入し、酸化アルミと複合して強固かつ緻密な複
合被膜を形成し、耐候性、耐蝕性、耐熱性、耐摩耗性等
が向上すると共に、アルミニウム製治具の一部が浴液に
溶け出して被処理体に電着しても被処理体自体がアルミ
ニウムであるため問題はなく、更にまた、治具にのみ優
先的に浴液中の金属イオンが電着されるということもな
いため、電解浴液中の金属の種類やその侵入深さに応じ
て所期の着色処理を効率良くなされ、表面の摩擦係数も
少なくなり、色彩の経時変化も少なく、従来被膜が剥離
するため行ない得なかった機械加工も可能となり、更に
また、処理のためにシアン等の有毒物質を使用する必要
がない等々、多くの利点を有するアルミニウム又はその
合金の表面処理方法が提供されるものである。[Effects of the Invention] Since the present invention is constructed as described above, according to the present invention, the metal in the electrolytic bath solution penetrates deeply into the porous oxide film formed on the base metal of aluminum or its alloy. It is combined with aluminum oxide to form a strong and dense composite film, which improves weather resistance, corrosion resistance, heat resistance, abrasion resistance, etc., and prevents some of the aluminum jig from dissolving into the bath liquid. Even if the object to be treated is electrodeposited, there is no problem because the object itself is made of aluminum.Furthermore, metal ions in the bath solution are not preferentially electrodeposited only on the jig, so electrolytic The desired coloring process can be carried out efficiently depending on the type of metal in the bath liquid and the depth of its penetration, the surface friction coefficient is reduced, and the color changes less over time, which was previously impossible due to the peeling of the coating. A method of surface treatment of aluminum or its alloys is provided which has many advantages, such as machining being possible and, furthermore, no toxic substances such as cyanide having to be used for treatment.
【００１８】本発明に係るアルミニウム又はその合金の
表面処理方法は、軸受、歯車、スピンドル、弁、ピスト
ン、建具、インテリア及びエクステリア用品、文房具、
アクセサリ等々のほか、コンピュータやビデオレコーダ
等の磁気テープの接触部品の表面処理として、極めて広
範囲の分野で好適に利用できる。The surface treatment method for aluminum or its alloy according to the present invention can be applied to bearings, gears, spindles, valves, pistons, fittings, interior and exterior goods, stationery,
In addition to accessories, it can be suitably used in a wide range of fields, including surface treatment of magnetic tape contact parts in computers, video recorders, etc.
【００１９】なお、本発明の構成は叙上の実施例に限定
されるものではなく、例えば、電解浴液の組成やその電
解条件等は本発明の目的の範囲内において適宜変更し得
るものであり、従って本発明は上記の説明から当業者が
容易に想到し得るすべての変更実施例を包摂するもので
ある。The structure of the present invention is not limited to the above-described embodiments; for example, the composition of the electrolytic bath and the electrolytic conditions thereof may be changed as appropriate within the scope of the purpose of the present invention. Therefore, the present invention encompasses all modifications and variations that can readily occur to those skilled in the art from the above description.
【図１】図１は本発明にかゝるアルミニウム又はその合
金の表面処理方法を実施する装置の一実施例の概略を示
す説明図である。FIG. 1 is an explanatory diagram schematically showing an embodiment of an apparatus for carrying out the method for surface treatment of aluminum or its alloy according to the present invention.
【図２】図２は本発明方法により処理されたアルミニウ
ム又はアルミニウム合金の被膜部分の拡大断面図である
。FIG. 2 is an enlarged cross-sectional view of a coated portion of aluminum or aluminum alloy treated by the method of the present invention.
１ 電解槽 ２ 交流電源 ３ アルミニウム部材 ４ 電極 ５ 電解浴液 ６ アルミニウム製治具 1 Electrolytic cell 2 AC power supply 3 Aluminum parts 4 Electrode 5 Electrolyte bath solution 6 Aluminum jig
Claims (8)
ウム合金の表面に陽極酸化被膜を形成する工程と、上記
工程により陽極酸化被膜を形成した部材に、所望の金属
の硫酸塩溶液又は硝酸塩溶液中で１０ないし３０Ｖの交
流電圧を加えてその金属を陽極酸化被膜中に電解含滲せ
しめる工程とから成るアルミニウム又はその合金の表面
処理方法において、処理を施すべき上記アルミニウム又
はアルミニウム合金から成る部材（３） を上記電解浴
液（５） 中に保持し、通電する治具（６） としてア
ルミニウム製のものを使用することを特徴とするアルミ
ニウム又はその合金の表面処理方法。Claim 1: A step of forming an anodic oxide film on the surface of aluminum or an aluminum alloy by a conventional method, and treating the member on which the anodic oxide film has been formed by the above step in a sulfate solution or nitrate solution of a desired metal for 10 to 10 minutes. In a method for surface treatment of aluminum or its alloy, which comprises a step of electrolytically impregnating the metal into the anodic oxide film by applying an AC voltage of 30 V, the member (3) made of the aluminum or aluminum alloy to be treated is treated as described above. A method for surface treatment of aluminum or its alloy, characterized in that a jig (6) made of aluminum is used as a jig (6) held in an electrolytic bath solution (5) and energized.
２５ｇ／リットル、ホウ酸２５〜３０ｇ／リットル、硫
酸又は硝酸 ０．３〜０．５ ｇ／リットルとする請求
項１に記載のアルミニウム又はその合金の表面処理方法
。2. The composition of the electrolytic bath solution is set to 10 to 10% of the metal salt.
25 g/liter, boric acid 25 to 30 g/liter, and sulfuric acid or nitric acid 0.3 to 0.5 g/liter. The method for surface treatment of aluminum or its alloy according to claim 1.
に記載のアルミニウム又はその合金の表面処理方法。Claim 3: Claim 1, wherein the treatment temperature is 5 to 20°C.
The method for surface treatment of aluminum or its alloy as described in .
３に記載のアルミニウム又はその合金の表面処理方法。4. The method for surface treatment of aluminum or its alloy according to claim 3, wherein the treatment temperature is 10 to 15°C.
求項１に記載のアルミニウム又はその合金の表面処理方
法。5. The method for surface treatment of aluminum or its alloy according to claim 1, wherein the AC voltage is 10 to 30V.
常法によるアルマイト形成工程である請求項１に記載の
アルミニウム又はその合金の表面処理方法。6. The step of forming the anodic oxide film comprises:
The method for surface treatment of aluminum or its alloy according to claim 1, which is an alumite forming step by a conventional method.
陽極で重合する低重合アクリル樹脂組成物を含む電解浴
液を用い、低温で被加工体を陽極として通電し、アクリ
ル樹脂組成物と複合した陽極酸化被膜を形成する工程で
ある請求項１に記載のアルミニウム又はその合金の表面
処理方法。7. The step of forming the anodic oxide film comprises:
2. The step of forming an anodic oxide film composite with the acrylic resin composition by using an electrolytic bath solution containing a low-polymerized acrylic resin composition that polymerizes at the anode and applying current to the workpiece at a low temperature using the workpiece as an anode. surface treatment method for aluminum or its alloy.
が、銀の硫酸塩溶液又は硝酸塩溶液である請求項１に記
載のアルミニウム又はその合金の表面処理方法。8. The method for surface treatment of aluminum or its alloy according to claim 1, wherein the metal sulfate solution or nitrate solution is a silver sulfate solution or nitrate solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7168191A JPH04308099A (en) | 1991-04-04 | 1991-04-04 | Surface treatment for aluminum or aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7168191A JPH04308099A (en) | 1991-04-04 | 1991-04-04 | Surface treatment for aluminum or aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04308099A true JPH04308099A (en) | 1992-10-30 |
Family
ID=13467554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7168191A Pending JPH04308099A (en) | 1991-04-04 | 1991-04-04 | Surface treatment for aluminum or aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04308099A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007284784A (en) * | 2006-03-20 | 2007-11-01 | Nissan Motor Co Ltd | Aluminum alloy-made part |
-
1991
- 1991-04-04 JP JP7168191A patent/JPH04308099A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007284784A (en) * | 2006-03-20 | 2007-11-01 | Nissan Motor Co Ltd | Aluminum alloy-made part |
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