JPH06116740A - Surface treatment of magnesium alloy product - Google Patents

Surface treatment of magnesium alloy product

Info

Publication number
JPH06116740A
JPH06116740A JP29082892A JP29082892A JPH06116740A JP H06116740 A JPH06116740 A JP H06116740A JP 29082892 A JP29082892 A JP 29082892A JP 29082892 A JP29082892 A JP 29082892A JP H06116740 A JPH06116740 A JP H06116740A
Authority
JP
Japan
Prior art keywords
treatment
parts
magnesium alloy
alloy product
surface treatment
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.)
Granted
Application number
JP29082892A
Other languages
Japanese (ja)
Other versions
JP3102664B2 (en
Inventor
Makoto Dobashi
誠 土橋
Mitsuo Suzuki
光夫 鈴木
Susumu Takahashi
進 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Mining and Smelting Co Ltd
Original Assignee
Mitsui Mining and Smelting Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Mining and Smelting Co Ltd filed Critical Mitsui Mining and Smelting Co Ltd
Priority to JP04290828A priority Critical patent/JP3102664B2/en
Publication of JPH06116740A publication Critical patent/JPH06116740A/en
Application granted granted Critical
Publication of JP3102664B2 publication Critical patent/JP3102664B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/23—Condensed phosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

PURPOSE:To improve the corrosion resistance of the surfaces of Mg-Al alloy parts without deteriorating the dimensional accuracy of the parts by cleaning the surfaces of the parts, then treating the surfaces with a pyrophosphate soln. and an alkali hydroxide soln. CONSTITUTION:The Al-contg. alloy parts, such as MC 1, 2, 3 and MDC1A, 1B, 1C, 2B and 3A and others specified in JIS(Japanese Industrial Standards) H 5303 are first degreased by an org. solvent, such as trichloroethylene and are thereafter subjected to a surface treatment for 0.5 to 5minutes with an aq. soln. of 10 to 50g/l concn. of the Na salt or K salt of pyrophosphoric acid kept at room temp. to 70 deg.C. After these parts are washed with water, the parts are subjected to a surface treatment for 0.5 to 5 minutes with an aq. soln. of 10 to 100g/l concn. of alkaline metal hydroxides, such as KOH and NaOH, kept at room temp. to 70 deg.C. The Mg alloy parts are etched by the treatment with these solns., by which the Mg-Al alloy parts having the excellent corrosion resistance and the excellent surface characteristics are obtd. without degrading the dimensional accuracy and without subjecting the parts to a chromate treatment and coating.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明はアルミニウム含有マグネ
シウム合金製品の表面処理法に関し、より詳しくは、ク
ロメート処理や塗装を行うことなしで実用的な耐食性を
達成することのできるアルミニウム含有マグネシウム合
金製品の表面処理法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for an aluminum-containing magnesium alloy product, and more particularly, to a surface-treating method for an aluminum-containing magnesium alloy product capable of achieving practical corrosion resistance without chromate treatment or painting. Regarding surface treatment method.

【０００２】[0002]

【従来の技術】従来、アルミニウム含有マグネシウム合
金製品の防食処理として、クロム酸塩溶液、硝酸第二鉄
溶液、濃水酸化ナトリウム溶液、フッ酸塩溶液等を用い
て表面調整処理、清浄処理し、その後クロメート化等の
化成処理、陽極酸化処理、塗装等を行っていた。2. Description of the Related Art Conventionally, as an anticorrosion treatment for aluminum-containing magnesium alloy products, a surface conditioning treatment and a cleaning treatment using a chromate solution, ferric nitrate solution, concentrated sodium hydroxide solution, hydrofluoric acid solution, etc. After that, chemical conversion treatment such as chromate treatment, anodization treatment, and coating were performed.

【０００３】[0003]

【発明が解決しようとする課題】これらの表面調整処
理、清浄処理においては、アルミニウム含有マグネシウ
ム合金製品表面のエッチング量が大きいので寸法精度の
問題があり、且つその清浄化された表面の耐食性が低下
するので室内用途にも使用不可能となる。従って、これ
らの表面調整処理、清浄処理に引き続いて、必然的に化
成処理、塗装等を施して耐食性とする必要があった。ま
た、これらの表面調整処理、清浄処理は処理温度が高か
ったり、フッ化物を添加した浴を使用したりするので、
ミストの発生により作業環境が損なわれることがあり、
公害対策上も問題があった。In these surface conditioning treatments and cleaning treatments, the etching amount on the surface of the aluminum-containing magnesium alloy product is large, so that there is a problem of dimensional accuracy, and the corrosion resistance of the cleaned surface decreases. As a result, it cannot be used indoors. Therefore, following these surface conditioning treatments and cleaning treatments, it is necessary to inevitably perform chemical conversion treatments, paintings, etc. to make them corrosion resistant. In addition, since these surface conditioning treatments and cleaning treatments involve high treatment temperatures and use of fluoride-added baths,
The work environment may be damaged by the generation of mist,
There was also a problem in terms of pollution control.

【０００４】本発明は、このような従来技術の課題に鑑
みてなされたものであり、本発明の目的は、寸法精度を
確保でき、温和な条件下で処理でき、公害の問題も生ぜ
ず、清浄化及び耐食性の付与を同時に達成することので
きるアルミニウム含有マグネシウム合金製品の表面処理
法を提供することにある。The present invention has been made in view of the above problems of the prior art. The object of the present invention is to ensure dimensional accuracy, to process under mild conditions, and to prevent pollution problems. It is an object of the present invention to provide a surface treatment method for an aluminum-containing magnesium alloy product capable of simultaneously achieving cleaning and imparting corrosion resistance.

【０００５】[0005]

【課題を解決するための手段】本発明のアルミニウム含
有マグネシウム合金製品の表面処理法は、アルミニウム
含有マグネシウム合金製品をピロリン酸塩溶液で処理す
ること、及びその後水酸化アルカリ溶液で処理すること
を特徴とし、好ましくはピロリン酸塩濃度１０〜５０g/
l の水溶液及び水酸化アルカリ濃度１０〜１００g/l の
水溶液を使用し、ピロリン酸塩水溶液での処理及び水酸
化アルカリ水溶液での処理をそれぞれ室温〜７０℃で
０．５〜５分間実施することを特徴とする。The surface treatment method for an aluminum-containing magnesium alloy product of the present invention is characterized in that the aluminum-containing magnesium alloy product is treated with a pyrophosphate solution, and then with an alkali hydroxide solution. And preferably the pyrophosphate concentration is 10 to 50 g /
l aqueous solution and alkaline hydroxide concentration 10-100 g / l aqueous solution, and carry out treatment with pyrophosphate aqueous solution and alkaline hydroxide aqueous solution at room temperature to 70 ° C for 0.5 to 5 minutes, respectively. Is characterized by.

【０００６】本発明の表面処理法の対象となるアルミニ
ウム含有マグネシウム合金製品は、ＪＩＳ Ｈ５３０３
のＭＣ１、２、３及び５、ＭＤＣ１Ａ、１Ｂ、１Ｃ、２
Ａ、２Ｂ及び３Ａ、ＭＢ１、２及び３、ＭＴ１及び２等
のアルミニウム含有マグネシウム合金を用いて得た金型
鋳造品、砂型鋳造品、ダイカスト、展伸材、切削加工品
等であり、これらに対して等しく適用できる。The aluminum-containing magnesium alloy product which is the object of the surface treatment method of the present invention is JIS H5303.
MC 1, 2, 3 and 5, MDC 1A, 1B, 1C, 2
A, 2B and 3A, MB1, 2 and 3, MT1 and 2, and the like, which are die castings, sand castings, die castings, wrought products, and cut products obtained by using aluminum-containing magnesium alloys. Is equally applicable to

【０００７】本発明の表面処理法においては、現実的に
は、アルミニウム含有マグネシウム合金製品の表面をト
リクロロエチレン、エタノール、メタノール、アセトン
等の有機溶剤を用いて脱脂し、ピロリン酸塩濃度１０〜
５０g/l の水溶液で処理し、水洗し、水酸化アルカリ濃
度１０〜１００g/l の水溶液で処理し、水洗し、その後
十分に乾燥する。これらのピロリン酸塩水溶液での処理
及び水酸化アルカリ水溶液での処理のためのそれぞれの
処理温度、処理時間は好ましくは室温〜７０℃、０．５
〜５分間であるが、この範囲外でも実施可能である。In the surface treatment method of the present invention, practically, the surface of the aluminum-containing magnesium alloy product is degreased with an organic solvent such as trichlorethylene, ethanol, methanol or acetone to obtain a pyrophosphate concentration of 10 to 10.
It is treated with an aqueous solution of 50 g / l, washed with water, treated with an aqueous solution having an alkali hydroxide concentration of 10 to 100 g / l, washed with water, and then sufficiently dried. The treatment temperature and treatment time for the treatment with the aqueous pyrophosphate solution and the treatment with the aqueous alkali hydroxide solution are preferably room temperature to 70 ° C. and 0.5, respectively.
It is ~ 5 minutes, but it can be carried out outside this range.

【０００８】本発明の表面処理法においては、フッ化物
を添加した浴は一切使用していないので公害の問題は発
生せず、温和な条件下での処理にもかかわらず合金製品
表面に付着している不純物（離型剤、酸化物等）を有効
に除去することができ、温和な条件下での処理であるの
でエッチング量が少なく、従って寸法精度を確保するこ
とができる。In the surface treatment method of the present invention, since no bath containing fluoride is used, there is no problem of pollution, and it adheres to the surface of the alloy product despite the treatment under mild conditions. The impurities (release agent, oxide, etc.) present can be effectively removed, and since the treatment is performed under mild conditions, the etching amount is small, and therefore the dimensional accuracy can be secured.

【０００９】本発明の表面処理法においては、ピロリン
酸塩水溶液での処理によりアルミニウム含有マグネシウ
ム合金製品表面の主としてマグネシウムが溶出するので
合金成分のアルミニウムや亜鉛が表面で濃化して残存す
る。その後の水酸化アルカリ水溶液での処理によりマグ
ネシウムはMg(OH)2 となって合金製品表面に極く薄い被
膜を形成し、溶出することはない。また表面に濃化した
いたアルミニウムや亜鉛も水酸化アルカリ水溶液での処
理により酸化物や水酸化物となり、合金製品表面に被膜
を形成する。このような被膜によりアルミニウム含有マ
グネシウム合金製品の耐食性は向上し、室内用途には十
分な耐食性となる。In the surface treatment method of the present invention, mainly magnesium on the surface of the aluminum-containing magnesium alloy product is eluted by the treatment with the aqueous solution of pyrophosphate, so that the alloy components aluminum and zinc are concentrated and remain on the surface. Subsequent treatment with an alkali hydroxide aqueous solution turns magnesium into Mg (OH) 2 and forms an extremely thin film on the surface of the alloy product, which never elutes. Further, aluminum and zinc concentrated on the surface also become oxides or hydroxides by the treatment with the alkali hydroxide aqueous solution, and form a film on the surface of the alloy product. Such a coating improves the corrosion resistance of the aluminum-containing magnesium alloy product, and provides sufficient corrosion resistance for indoor use.

【００１０】本発明の表面処理法で処理したアルミニウ
ム含有マグネシウム合金製品の耐食性を更に向上させた
い場合にはその処理した表面に更にクロメート処理する
ことができる。このクロメート処理においては、重クロ
ム酸塩濃度を従来よりもかなり低くしても十分に効果を
達成することができる。その理由については必ずしも明
確ではないが、上記のピロリン酸塩水溶液での処理及び
水酸化アルカリ水溶液での処理によりアルミニウム含有
マグネシウム合金製品の表面にアルミニウム及びマグネ
シウムの水酸化物が生成し、その後のクロメート処理に
より密着性の良好なクロム酸化物・水酸化物が容易に生
成するものと思われる。また、このように重クロム酸塩
の濃度を低くすることにより製品表面の粗れを防止する
ことができる。更に、上記のピロリン酸塩水溶液での処
理及び水酸化アルカリ水溶液での処理により、アルミニ
ウム含有マグネシウム合金製品表面に付着している不純
物が除去されるので、クロメート液の寿命を延ばすこと
ができる。またそのクロメート処理液に少量のアニオン
界面活性剤を含有させることにより、クロメート処理の
際のミストの発生を防止することができ、作業環境が損
なわれることはない。例えば重クロム酸塩濃度３５〜８
０g/l 、硝酸（６０％）濃度２５〜１３０ml/l、アニオ
ン系界面活性剤濃度０．１〜０．６g/l のクロメート処
理液を用いることができ、このクロメート処理のための
処理温度、処理時間は好ましくはを室温〜３５℃、０．
５〜２分間であるが、この範囲外でも実施可能である。When it is desired to further improve the corrosion resistance of the aluminum-containing magnesium alloy product treated by the surface treatment method of the present invention, the treated surface can be further chromated. In this chromate treatment, the effect can be sufficiently achieved even if the dichromate concentration is much lower than the conventional one. Although the reason for this is not clear, treatment with the aqueous solution of pyrophosphate and treatment with the aqueous solution of alkali hydroxide produce aluminum and magnesium hydroxide on the surface of the aluminum-containing magnesium alloy product, and the subsequent chromate treatment. It is considered that chromium oxide / hydroxide with good adhesion is easily formed by the treatment. Further, by lowering the concentration of dichromate in this way, it is possible to prevent the surface of the product from becoming rough. Further, the treatment with the aqueous solution of pyrophosphate and the treatment with the aqueous solution of alkali hydroxide remove the impurities adhering to the surface of the aluminum-containing magnesium alloy product, so that the life of the chromate solution can be extended. Further, by containing a small amount of anionic surfactant in the chromate treatment liquid, it is possible to prevent the generation of mist during the chromate treatment, and the working environment is not impaired. For example, dichromate concentration 35-8
A chromate treatment solution having a concentration of 0 g / l, nitric acid (60%) of 25 to 130 ml / l, and an anionic surfactant concentration of 0.1 to 0.6 g / l can be used, and a treatment temperature for this chromate treatment, The treatment time is preferably from room temperature to 35 ° C., 0.
It takes 5 to 2 minutes, but it can be carried out outside this range.

【００１１】上記のクロメート処理に引続いてアルミニ
ウム含有マグネシウム合金製品を空気中に放置してクロ
メート被膜を完成させ、次いで余分のクロメート処理液
を除去し、水洗する。Subsequent to the above chromate treatment, the aluminum-containing magnesium alloy product is left in the air to complete the chromate film, and then the excess chromate treatment liquid is removed and washed with water.

【００１２】[0012]

【実施例】【Example】

実施例１〜１８及び比較例１ 表１に記載のＪＩＳ Ｈ５３０３ ＭＣ１、ＭＣ２、Ｍ
Ｃ５又はＭＣ６（アルミニウムを含まず、比較例１）合
金の溶湯を金型中に鋳込んで長さ１０cm、幅５cm、厚さ
２mmの試験片を作成した。トリクロロエチレンを用いて
この試験片を脱脂し、次いで表１に記載した種類及び濃
度のピロリン酸塩の水溶液中に表１に記載の温度で表１
に記載の時間浸漬し、その後水洗した。次いで表１に記
載した種類及び濃度の水酸化アルカリ金属の水溶液中に
表１に記載の温度で表１に記載の時間浸漬し、その後水
洗し、十分に乾燥した。このように処理して得た製品の
寸法変化及びＪＩＳ Ｚ２３７１「塩水噴霧試験方法」
による塩水噴霧試験８時間後のＪＩＳ Ｈ８５０２によ
る評価Ｒ．Ｎｏ（ｎ＝５）は表１に示す通りであった。Examples 1 to 18 and Comparative Example 1 JIS H5303 MC1, MC2, M described in Table 1
A molten metal of C5 or MC6 (comparative example 1 not containing aluminum) was cast into a mold to prepare a test piece having a length of 10 cm, a width of 5 cm and a thickness of 2 mm. The test pieces were degreased with trichlorethylene and then placed in an aqueous solution of pyrophosphate of the type and concentration listed in Table 1 at the temperatures listed in Table 1
It was immersed for the time described in 1) and then washed with water. Then, it was immersed in an aqueous solution of an alkali metal hydroxide of the type and concentration shown in Table 1 at the temperature shown in Table 1 for the time shown in Table 1, then washed with water, and dried sufficiently. Dimensional change of products obtained by such treatment and JIS Z2371 "Salt spray test method"
Evaluation by JIS H8502 after 8 hours of salt spray test by R. No (n = 5) was as shown in Table 1.

【００１３】比較例２ ＪＩＳ Ｈ５３０３ ＭＣ２合金の溶湯を金型中に鋳込
んで長さ１０cm、幅５cm、厚さ２mmの試験片を作成し
た。トリクロロエチレンを用いてこの試験片を脱脂し、
水洗し、十分に乾燥した。このように処理して得た製品
の寸法変化及びＪＩＳ Ｚ２３７１「塩水噴霧試験方
法」による塩水噴霧試験８時間後のＪＩＳＨ８５０２に
よる評価Ｒ．Ｎｏ（ｎ＝５）は表１に示す通りであっ
た。Comparative Example 2 A test piece having a length of 10 cm, a width of 5 cm and a thickness of 2 mm was prepared by casting a molten metal of JIS H5303 MC2 alloy in a mold. Degrease this test piece with trichlorethylene,
It was washed with water and dried thoroughly. The dimensional change of the product obtained by the above treatment and the evaluation by JIS H8502 after 8 hours of the salt spray test according to JIS Z2371 "Salt spray test method". No (n = 5) was as shown in Table 1.

【００１４】比較例３ ＪＩＳ Ｈ５３０３ ＭＣ２合金の溶湯を金型中に鋳込
んで長さ１０cm、幅５cm、厚さ２mmの試験片を作成し
た。トリクロロエチレンを用いてこの試験片を脱脂し、
次いでCrO3１８０g/l 、Fe(NO3)3・9H2O ３３g/l 及びNa
F ３３g/l を含有する溶液中で３０℃で２分間処理し、
水洗し、十分に乾燥した。このように処理して得た製品
の寸法変化及びＪＩＳ Ｚ２３７１「塩水噴霧試験方
法」による塩水噴霧試験８時間後のＪＩＳ Ｈ８５０２
による評価Ｒ．Ｎｏ（ｎ＝５）は表１に示す通りであっ
た。Comparative Example 3 A molten sample of JIS H5303 MC2 alloy was cast into a mold to prepare a test piece having a length of 10 cm, a width of 5 cm and a thickness of 2 mm. Degrease this test piece with trichlorethylene,
Then CrO 3 180g / l, Fe ( NO 3) 3 · 9H 2 O 33g / l and Na
Treated in a solution containing 33 g / l F for 2 minutes at 30 ° C.,
It was washed with water and dried thoroughly. The dimensional change of the product obtained by the above treatment and JIS H8502 after 8 hours of the salt spray test according to JIS Z2371 "Salt spray test method"
Evaluation by R. No (n = 5) was as shown in Table 1.

【００１５】[0015]

【表１】 表１のデータから明らかなように、本発明の表面処理法
で処理したアルミニウム含有マグネシウム合金製品は寸
法変化は小さく、室内用途に十分な耐食性を有してい
る。[Table 1] As is clear from the data in Table 1, the aluminum-containing magnesium alloy product treated by the surface treatment method of the present invention has a small dimensional change and has sufficient corrosion resistance for indoor use.

【００１６】[0016]

【発明の効果】本発明の表面処理法により、寸法変化は
小さく、室内用途に十分な耐食性を有アルミニウム含有
マグネシウム合金製品を得ることができる。According to the surface treatment method of the present invention, it is possible to obtain an aluminum-containing magnesium alloy product having a small dimensional change and sufficient corrosion resistance for indoor use.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 アルミニウム含有マグネシウム合金製品
をピロリン酸塩溶液で処理すること、及びその後水酸化
アルカリ溶液で処理することを特徴とするアルミニウム
含有マグネシウム合金製品の表面処理法。1. A method for surface treatment of an aluminum-containing magnesium alloy product, which comprises treating the aluminum-containing magnesium alloy product with a pyrophosphate solution and then treating with an alkali hydroxide solution. 【請求項２】 ピロリン酸塩濃度１０〜５０g/l の水溶
液及び水酸化アルカリ濃度１０〜１００g/l の水溶液を
使用し、ピロリン酸塩水溶液での処理及び水酸化アルカ
リ水溶液での処理をそれぞれ室温〜７０℃で０．５〜５
分間実施することを特徴とする請求項１記載の表面処理
法。2. An aqueous solution having a pyrophosphate concentration of 10 to 50 g / l and an alkali hydroxide concentration of 10 to 100 g / l are used, and the treatment with the pyrophosphate aqueous solution and the treatment with an alkali hydroxide aqueous solution are carried out at room temperature, respectively. 0.5 ~ 5 at ~ 70 ℃
The surface treatment method according to claim 1, wherein the surface treatment is performed for a period of time.
JP04290828A 1992-10-05 1992-10-05 Surface treatment method for magnesium alloy products Expired - Fee Related JP3102664B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050666A1 (en) * 1999-02-25 2000-08-31 Hosaka Inc. Method for treating magnesium-based metal formed article and treating solution therefor
EP1277853A1 (en) * 2000-04-27 2003-01-22 Otsuka Kagaku Kabushiki Kaisha Process for producing part made of magnesium and/or magnesium alloy
WO2003044243A1 (en) * 2001-11-21 2003-05-30 Nippon Paint Co., Ltd. Method of surface treatment for magnesium and/or magnesium alloy, and magnesium and/or magnesium alloy product
JP2017505381A (en) * 2013-12-26 2017-02-16 ポスコＰｏｓｃｏ Color-treated substrate and method for coloring the substrate for the same

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KR100758132B1 (en) * 2005-10-11 2007-09-12 오성엘에스티(주) An Accumulate Roller Having High-Viscosity Grease Drive System

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050666A1 (en) * 1999-02-25 2000-08-31 Hosaka Inc. Method for treating magnesium-based metal formed article and treating solution therefor
EP1277853A1 (en) * 2000-04-27 2003-01-22 Otsuka Kagaku Kabushiki Kaisha Process for producing part made of magnesium and/or magnesium alloy
EP1277853A4 (en) * 2000-04-27 2004-04-07 Otsuka Kagaku Kk Process for producing part made of magnesium and/or magnesium alloy
US6787192B2 (en) 2000-04-27 2004-09-07 Otsuka Kagaku Kabushiki Kaisha Process for producing part made of magnesium and/or magnesium alloy
WO2003044243A1 (en) * 2001-11-21 2003-05-30 Nippon Paint Co., Ltd. Method of surface treatment for magnesium and/or magnesium alloy, and magnesium and/or magnesium alloy product
CN1303248C (en) * 2001-11-21 2007-03-07 日本油漆株式会社 Method of surface treatment for magnesium and/or magnesium alloy, and magnesium and/or magnesium alloy product
JP2017505381A (en) * 2013-12-26 2017-02-16 ポスコＰｏｓｃｏ Color-treated substrate and method for coloring the substrate for the same

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