JP2002336772A - Coating method for magnesium material - Google Patents
Coating method for magnesium materialInfo
- Publication number
- JP2002336772A JP2002336772A JP2001150060A JP2001150060A JP2002336772A JP 2002336772 A JP2002336772 A JP 2002336772A JP 2001150060 A JP2001150060 A JP 2001150060A JP 2001150060 A JP2001150060 A JP 2001150060A JP 2002336772 A JP2002336772 A JP 2002336772A
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- Prior art keywords
- coating
- magnesium material
- inorganic
- magnesium
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、マグネシウム材
の塗装方法に関し、無機有機複合系塗料を用いることに
より、従来のプライマ塗布工程を省略できるようにした
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a magnesium material, wherein a conventional primer coating step can be omitted by using an inorganic-organic composite paint.
【０００２】[0002]
【従来の技術】従来のマグネシウム材の塗装方法は、以
下のようにして行われている。まず、マグネシウム、マ
グネシウム合金を所望の形状に成形して得られたマグネ
シウム材に酸あるいはアルカリを用いたエッチング処理
を施す。ついで、化成被膜処理を施す。この化成被膜処
理は、クロメート処理、リン酸塩処理によって行われ、
マグネシウム材の表面に薄い化成被膜が形成される。2. Description of the Related Art A conventional method for coating a magnesium material is performed as follows. First, a magnesium material obtained by forming magnesium or a magnesium alloy into a desired shape is subjected to an etching treatment using an acid or an alkali. Next, a chemical conversion coating treatment is performed. This conversion coating treatment is performed by chromate treatment and phosphate treatment,
A thin conversion coating is formed on the surface of the magnesium material.
【０００３】この化成被膜が形成されたマグネシウム材
の表面にプライマを塗布し、乾燥する。このプライマに
は、接着性が良好なエポキシ樹脂系プライマが主に用い
られる。このプライマの上に上塗りとしてアクリル樹脂
系塗料、メラミン樹脂系塗料を塗布して、一連の塗布作
業が終了する。[0003] A primer is applied to the surface of the magnesium material on which the chemical conversion film is formed, and dried. For this primer, an epoxy resin-based primer having good adhesiveness is mainly used. An acrylic resin-based paint and a melamine resin-based paint are applied as a top coat on the primer, and a series of application operations is completed.
【０００４】しかしながら、このような塗装方法にあっ
ては、プライマ塗布工程が存在するため、作業ラインが
長くなり、作業時間が長く、これによって塗装コストが
高くつく欠点がある。一般に、金属製品の表面塗装に
は、光沢、硬度、耐摩耗などの特性の点を考慮してアク
リル樹脂系塗料、メラミン樹脂系塗料などが用いられて
いる。しかし、このアクリル樹脂系塗料などは、マグネ
シウム材の化成被膜との接着性が十分でなく、この接着
性を高めるため上述のエポキシ樹脂系などのプライマを
使用せざるをえない状況にある。[0004] However, such a coating method has a drawback that a work line is lengthened and a work time is lengthened due to the presence of a primer coating step, thereby increasing the coating cost. Generally, acrylic resin-based paints, melamine resin-based paints, and the like are used for surface coating of metal products in consideration of properties such as gloss, hardness, and abrasion resistance. However, this acrylic resin-based paint or the like does not have sufficient adhesiveness to a chemical conversion coating of a magnesium material, and in order to enhance this adhesiveness, it is inevitable to use the above-described primers such as epoxy resin-based primers.
【０００５】[0005]
【発明が解決しようとする課題】よって、本発明におけ
る課題は、マグネシウム材の塗装において、プライマの
塗布、乾燥を不要とし、塗装作業性を高めることにあ
る。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to eliminate the necessity of applying and drying a primer in the coating of a magnesium material, and to enhance the coating workability.
【０００６】[0006]
【課題を解決するための手段】かかる課題は、マグネシ
ウム材の化成被膜上に上塗り塗料として、無機有機複合
系塗料を直接塗布し、乾燥する方法で解決できる。ま
た、予め形成した化成被膜を上塗りの無機有機複合系塗
料の塗布前に１３０〜１８０℃で加熱することが、塗膜
の発泡を防止できて好ましい。さらに、無機有機複合系
塗料には、シリコーンオリゴマーの加水分解物とシラン
化合物の加水分解物と有機樹脂を含むものが使用され
る。This problem can be solved by a method in which an inorganic-organic composite paint is directly applied as a top coat on a conversion coating of a magnesium material and then dried. Further, it is preferable to heat the previously formed chemical conversion film at 130 to 180 ° C. before applying the overcoated inorganic-organic composite paint, since foaming of the coating film can be prevented. Further, as the inorganic-organic composite paint, a paint containing a hydrolyzate of a silicone oligomer, a hydrolyzate of a silane compound, and an organic resin is used.
【０００７】[0007]
【発明の実施の形態】以下、本発明を詳しく説明する。
本発明における被塗装物であるマグネシウム材は、マグ
ネシウムやＡＺ−９１Ｄなどのマグネシウム合金を射出
成形、ダイキャスト成形などにより、所望の形状に成形
したものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The magnesium material to be coated in the present invention is obtained by molding magnesium or a magnesium alloy such as AZ-91D into a desired shape by injection molding, die casting or the like.
【０００８】このマグネシウム材を、まずエッチング処
理する。このエッチング処理は、硫酸、塩酸などの酸あ
るいは水酸化ナトリウム、炭酸ナトリウムなどのアルカ
リの水溶液または温水溶液にマグネシウム材を浸し、マ
グネシウム材の表面の油脂、汚れなどを除去し、表面に
均一な酸化膜を形成する公知の方法で行うことができ
る。This magnesium material is first subjected to an etching treatment. In this etching treatment, the magnesium material is immersed in an aqueous solution of an acid such as sulfuric acid or hydrochloric acid, or an alkaline solution such as sodium hydroxide or sodium carbonate or a warm aqueous solution to remove oils and fats and dirt on the surface of the magnesium material, and to uniformly oxidize the surface. It can be performed by a known method for forming a film.
【０００９】ついで、エッチング処理されたマグネシウ
ム材を、化成被膜処理する。この化成被膜処理は、周知
のクロメート被膜処理法、リン酸塩被膜処理法などによ
って行われ、マグネシウム材表面にマグネシウムリン酸
被膜やクロム酸マグネシウム被膜などの薄い化成被膜を
形成するものである。この化成被膜処理で形成された化
成被膜の厚みは０．１μｍ以上、好ましくは０．２〜５
μｍ程度とされる。Next, the magnesium material having been subjected to the etching treatment is subjected to a chemical conversion coating treatment. This conversion coating treatment is performed by a well-known chromate coating treatment method, phosphate coating treatment method, or the like, and forms a thin chemical conversion coating such as a magnesium phosphate coating or a magnesium chromate coating on the surface of the magnesium material. The thickness of the conversion coating formed by this conversion coating treatment is 0.1 μm or more, preferably 0.2 to 5 μm.
It is about μm.
【００１０】この化成被膜処理後、マグネシウム材は、
残余の処理液等を除去するため洗浄され、加熱乾燥され
て、次の塗装工程に送られるが、本発明ではこの加熱乾
燥に際して温度１３０〜１８０℃、時間５〜６０分の条
件で加熱を行うことが重要である。また、化成被膜処理
から次の塗装までに１週間程度の時間をあけた場合に
は、塗装前に再度温度１３０〜１８０℃、時間５〜６０
分の条件で加熱を行うことが重要である。After this chemical conversion coating treatment, the magnesium material is:
It is washed to remove the remaining processing liquid, etc., dried by heating, and sent to the next coating step. In the present invention, the heating and drying are performed at a temperature of 130 to 180 ° C. for a time of 5 to 60 minutes. This is very important. In addition, when a time of about one week is left between the conversion coating treatment and the next coating, the temperature is again 130 to 180 ° C. and the time is 5 to 60 before coating.
It is important to heat under the condition of minutes.
【００１１】結局、化成被膜処理から次の塗装に至るま
での時間が短い場合でも、長い場合でも、塗装前に温度
１３０〜１８０℃、時間５〜６０分の条件で少なくとも
１回は加熱することが大切であり、この加熱によって、
マグネシウム材からの揮発成分の蒸発に基づく発泡を防
止することができる。After all, regardless of whether the time from the conversion coating treatment to the next coating is short or long, it is necessary to heat at least once at 130 to 180 ° C. for 5 to 60 minutes before coating. Is important, and by this heating,
Foaming based on evaporation of volatile components from the magnesium material can be prevented.
【００１２】ついで、このマグネシウム材にプライマ処
理を施すことなく上塗り塗装を施す。ここで使用される
上塗り塗料には、無機有機複合系塗料が用いられる。本
発明で用いられる無機有機複合塗料とは、下記の３成分
を含有するものである。 （１）シリコーンオリゴマーの加水分解縮合物と、
（２）シラン化合物の加水分解縮合物物と、（３）有機
樹脂。Then, a top coat is applied to the magnesium material without performing a primer treatment. As the overcoat paint used here, an inorganic-organic composite paint is used. The inorganic-organic composite paint used in the present invention contains the following three components. (1) a hydrolysis-condensation product of a silicone oligomer;
(2) a hydrolyzed condensate of a silane compound; and (3) an organic resin.
【００１３】（１）シリコーンオリゴマーの加水分解縮
合物は、下記一般式（Ｉ）で示されるシリコーンオリゴ
マーを、有機溶媒中で水および酸触媒を添加することに
より得られる加水分解縮合物を含む溶液である。(1) The hydrolysis-condensation product of a silicone oligomer is a solution containing a hydrolysis-condensation product obtained by adding water and an acid catalyst to a silicone oligomer represented by the following general formula (I) in an organic solvent. It is.
【００１４】[0014]
【化１】 Embedded image
【００１５】（式中、Ｒは、水素原子、炭素数１〜４の
アルキル基またはフェニル基を表し、ｎは１〜２０の整
数である。）(In the formula, R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a phenyl group, and n is an integer of 1 to 20.)
【００１６】（２）シラン化合物の加水分解縮合物は、
下記一般式（ＩＩ）で示されるシラン化合物を、有機溶
媒中で水および酸触媒を添加することにより得られる加
水分解縮合物を含む溶液である。(2) The hydrolyzed condensate of the silane compound is
This is a solution containing a hydrolyzed condensate obtained by adding water and an acid catalyst in an organic solvent to a silane compound represented by the following general formula (II).
【００１７】[0017]
【化２】 （式中、Ｒ1およびＲ2は、同一でも異なっても良く、そ
れぞれ水素原子、炭素数１〜６のアルキル基、ＣＨ2Ｃ
Ｈ2ＯＣＨ3またはＣＨ2ＣＨ2ＯＣ2Ｈ5を表し、Ｒ3は水
素原子、炭素数１〜８のアルキル基またはアリール基を
表す。Ｘはγ−（メタ）アクリルオキシプロピル基、ビ
ニル基、フェニル基、γ−グリシドオキシ基を表す。）Embedded image (Wherein, R 1 and R 2 may be the same or different and each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, CH 2 C
Represents H 2 OCH 3 or CH 2 CH 2 OC 2 H 5 , R 3 represents a hydrogen atom, an alkyl group or an aryl group having 1 to 8 carbon atoms. X represents a γ- (meth) acryloxypropyl group, a vinyl group, a phenyl group, and a γ-glycidoxy group. )
【００１８】（３）有機樹脂とは、アクリル系樹脂、ア
ミノ系樹脂、ポリエステル系樹脂、エポキシ系樹脂、ア
クリル系樹脂とアミノ系樹脂の混合樹脂およびポリエス
テル系樹脂とアミノ系樹脂との混合樹脂から選ばれる有
機樹脂を有機溶媒で溶解した溶液である。(3) Organic resins include acrylic resins, amino resins, polyester resins, epoxy resins, mixed resins of acrylic resins and amino resins, and mixed resins of polyester resins and amino resins. This is a solution in which the selected organic resin is dissolved in an organic solvent.
【００１９】この３成分からなる塗料において、シリコ
ーンオリゴマーの加水分解縮合物とシラン化合物の加水
分解縮合物との量比は、両者の固形分の重量比が５：１
〜１：５の範囲とされる。また、シリコーンオリゴマー
の加水分解縮合物とシラン化合物の加水分解縮合物との
固形分の和と、有機樹脂固形分分との重量比は、１：１
０〜２：１の範囲とされる。この塗料には、着色剤、充
填材、紫外線吸収剤、帯電防止剤、消泡剤、酸化防止剤
などの添加剤を必要に応じて適宜加えることかできる。In the three-component paint, the weight ratio between the hydrolysis condensate of the silicone oligomer and the hydrolysis condensate of the silane compound is such that the weight ratio of the solid content of the two is 5: 1.
１ ： 1: 5. The weight ratio of the sum of the solid content of the hydrolysis condensate of the silicone oligomer and the hydrolysis condensate of the silane compound to the solid content of the organic resin is 1: 1.
The range is 0 to 2: 1. Additives such as a coloring agent, a filler, an ultraviolet absorber, an antistatic agent, an antifoaming agent, and an antioxidant can be appropriately added to the paint as needed.
【００２０】この無機有機複合系塗料のマグネシウム材
への塗布は、ディッピング法、エアスプレー法、エアレ
ススプレー法、スピンコーター法、ロールコーター法、
グラビアコーター法、カーテンコーター法などの公知の
塗布方法が採用できる。また、その加熱硬化法は、赤外
線炉、熱風炉などの加熱装置を使い、温度１３０〜１８
０℃、時間５〜６０分の条件で行われる。得られる塗膜
の厚みは、５〜５０μｍの範囲が好ましい。The application of the inorganic-organic composite paint to a magnesium material is performed by dipping, air spray, airless spray, spin coater, roll coater, or the like.
Known coating methods such as a gravure coater method and a curtain coater method can be adopted. In addition, the heat curing method uses a heating device such as an infrared furnace or a hot blast furnace, and has a temperature of 130 to 18
The reaction is performed at 0 ° C. for 5 to 60 minutes. The thickness of the obtained coating film is preferably in the range of 5 to 50 μm.
【００２１】このような塗装方法で得られた塗膜は、塗
膜の表面層側に実質的にＳｉ−Ｏ−結合のガラス質から
なる無機性成分が、マグネシウム材側に有機樹脂由来の
有機物を主体とし、これに微量の無機物が共存してなる
有機性成分が存在する２層構造となっており、この２層
構造に起因して高い光沢性、表面硬度、耐摩耗性、耐薬
品性、耐候性、耐汚染性が得られるとともに素地のマグ
ネシウム材との接着性も良好となり、あえてプライマ層
を必要としないものになる。In the coating film obtained by such a coating method, an inorganic component substantially composed of glass having Si—O— bonds is present on the surface layer side of the coating film, and an organic substance derived from an organic resin is present on the magnesium material side. It has a two-layer structure with an organic component in which a trace amount of an inorganic substance coexists, and has high gloss, surface hardness, abrasion resistance, and chemical resistance due to the two-layer structure. In addition, weather resistance and stain resistance are obtained, and the adhesion to the base magnesium material is improved, so that a primer layer is not required.
【００２２】このような塗装方法によれば、上塗り塗料
として上述の無機有機複合系塗料を用いているので、得
られる塗膜のマグネシウム材化成被膜表面への密着性、
接着性が高く、従来必要とされていたプライマ処理が不
要となり、これにより塗装作業性が向上する。また、塗
膜の光沢性、表面硬度、耐摩耗性、耐薬品性、耐候性、
耐汚染性が高く、従来のアクリル樹脂系塗料などの上塗
り塗料と同等以上の性能の塗膜が得られる。According to such a coating method, since the above-mentioned inorganic-organic composite coating material is used as the top coating material, adhesion of the obtained coating film to the surface of the magnesium material conversion coating film,
Adhesiveness is high, so that the previously required primer treatment is not required, thereby improving coating workability. In addition, gloss, surface hardness, abrasion resistance, chemical resistance, weather resistance,
A coating film having high stain resistance and performance equal to or higher than that of a top coat such as a conventional acrylic resin paint can be obtained.
【００２３】さらに、化成被膜処理後から無機有機複合
系塗料を塗布するまでの間に、少なくとも１回の温度１
３０〜１８０℃、時間５〜６０分の条件による加熱乾燥
を行うことで、マグネシウム材の揮発成分の蒸発に起因
する塗膜の発泡を防止できる。In addition, at least one temperature 1 after the chemical conversion coating treatment and before the application of the inorganic-organic composite paint.
By performing the heating and drying under the conditions of 30 to 180 ° C. and the time of 5 to 60 minutes, foaming of the coating film due to evaporation of the volatile component of the magnesium material can be prevented.
【００２４】以下、具体例を示す。マグネシウム合金
（ＡＺ−９１Ｄ）からなる板材を、塩酸を主成分とする
エッチング剤でエッチング処理し、ついで表１および表
２に示す化成被膜処理を行い、厚み約０．５μｍの化成
被膜を形成した。このものに、プライマ処理を行うこと
なしに、塗料Ａないし塗料Ｄを塗布し、表１、２に示す
加熱温度で焼き付けし、厚み５μｍの塗膜を形成して、
試験片を作成した。The following is a specific example. A plate material made of a magnesium alloy (AZ-91D) was etched with an etching agent containing hydrochloric acid as a main component, and then subjected to a conversion coating treatment shown in Tables 1 and 2 to form a conversion coating having a thickness of about 0.5 μm. . The coating material A to the coating material D was applied to this without applying the primer treatment, and baked at the heating temperature shown in Tables 1 and 2 to form a coating film having a thickness of 5 μm.
Test pieces were prepared.
【００２５】これらの試験片について、鉛筆硬度試験、
付着試験、耐塩水噴霧試験を行い、塗膜の性能を評価し
た。鉛筆硬度試験は、ＪＩＳ Ｓ ６００６に規定する
鉛筆を使用し、３Ｈ以上を合格とする。These test pieces were subjected to a pencil hardness test,
An adhesion test and a salt spray test were performed to evaluate the performance of the coating film. In the pencil hardness test, a pencil specified in JIS S6006 is used, and a value of 3H or more is regarded as a pass.
【００２６】付着試験は、試験片に１ｍｍ間隔でＪＩＳ
Ｇ ４４０１に規定するカッターナイフで、碁盤目１
００個（１０×１０）の切り目を入れ、ＪＩＳ Ｚ １
５２２相当の粘着テープを用いて剥離試験を行い、１０
０個付着を合格とする。耐塩水噴霧試験は、ＪＩＳ Ｚ
２３７１に準拠しておこない、著しい錆もしくは発泡
等の塗膜外観の変化がないものを合格とする。結果を表
１および表２に示す。In the adhesion test, JIS was applied to test pieces at intervals of 1 mm.
G 4401 with a cutter knife specified in G 4401
Make a cut of 00 (10 × 10), JIS Z 1
A peel test was performed using an adhesive tape equivalent to 522, and 10
Passing 0 pieces is acceptable. The salt spray test is JIS Z
The test was conducted in accordance with 2371, and a sample having no significant change in the appearance of the coating film, such as remarkable rust or foaming, was accepted. The results are shown in Tables 1 and 2.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【表２】 [Table 2]
【００２９】表１および表２において、塗料Ａは無機有
機複合系塗料、塗料Ｂは市販のアクリル樹脂系塗料、塗
料Ｃは市販のメラミン樹脂系塗料、塗料Ｄは市販のエポ
キシ樹脂系塗料である。表１、２の結果から、無機有機
複合系塗料を使用することで、プライマ処理を施さなく
とも、マグネシウム材に対する付着性が高く、表面硬度
も高いものとなることがわかる。また、化成被膜処理後
の加熱条件を上記範囲内とすることで、耐塩水噴霧性が
高くなることがわかる。In Tables 1 and 2, paint A is an inorganic-organic composite paint, paint B is a commercially available acrylic resin paint, paint C is a commercially available melamine resin paint, and paint D is a commercially available epoxy resin paint. . From the results shown in Tables 1 and 2, it can be seen that the use of the inorganic-organic composite paint results in high adhesion to the magnesium material and high surface hardness without performing the primer treatment. Further, it can be seen that by setting the heating conditions after the chemical conversion coating treatment within the above range, the salt spray resistance is improved.
【００３０】[0030]
【発明の効果】以上説明したように、本発明のマグネシ
ウム材の塗装方法は、マグネシウム材をエッチング処理
し、ついで化成被膜処理した後、無機有機複合系塗料を
塗布するものであるので、この塗料のマグネシウム材の
化成被膜表面への密着性が高く、化成被膜処理後のプラ
イマ処理を施さなくとも、良好な塗膜密着性を発揮し、
これによりプライマ処理を省略でき、作業性が大きく向
上する。As described above, the method of coating a magnesium material according to the present invention involves etching a magnesium material, then subjecting the magnesium material to a chemical conversion coating, and then applying an inorganic-organic composite paint. The adhesion of the magnesium material to the surface of the chemical conversion coating is high, and even without a primer treatment after the chemical conversion coating, it exhibits good coating adhesion,
Thereby, the primer process can be omitted, and the workability is greatly improved.
【００３１】また、この塗膜は、光沢性、表面硬度、耐
摩耗性、耐薬品性、耐候性、耐汚染性が高く、従来のア
クリル樹脂系塗料などの上塗り塗料と同等以上の性能が
得られる。さらに、化成被膜処理後から無機有機複合系
塗料を塗布するまでの間に１回以上の加熱を、温度１３
０〜１８０℃で行うようにすれば、塗膜の加熱時などに
生じる発泡を未然に防ぐことができる。Further, this coating film has high gloss, surface hardness, abrasion resistance, chemical resistance, weather resistance, and stain resistance, and has a performance equal to or higher than that of a top coating such as a conventional acrylic resin coating. Can be Further, one or more heatings are carried out at a temperature of 13 after the chemical conversion coating treatment and before the application of the inorganic-organic composite paint.
If the heating is performed at 0 to 180 ° C., foaming that occurs when the coating film is heated can be prevented.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 関川 幸弘 静岡県浜松市中沢町10番１号 ヤマハ株式 会社内 (72)発明者 福島 敏晴 静岡県浜松市中沢町10番１号 ヤマハ株式 会社内 Ｆターム(参考） 4D075 BB23X BB73X BB93X CA47 DA23 DB01 DB70 EB42 4J038 CG002 DA112 DB002 DD002 DL022 DL031 DL051 DL111 DL121 NA12 NA23 PC02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukihiro Sekikawa 10-1, Nakazawa-cho, Hamamatsu-shi, Shizuoka Yamaha Corporation (72) Inventor Toshiharu Fukushima 10-1, Nakazawa-machi, Hamamatsu-shi, Shizuoka Yamaha Corporation F Terms (reference) 4D075 BB23X BB73X BB93X CA47 DA23 DB01 DB70 EB42 4J038 CG002 DA112 DB002 DD002 DL022 DL031 DL051 DL111 DL121 NA12 NA23 PC02
Claims (4)
で化成被膜処理した後、無機有機複合系塗料を塗布する
ことを特徴とするマグネシウム材の塗装方法。1. A method for coating a magnesium material, comprising etching a magnesium material, subjecting it to a chemical conversion coating, and then applying an inorganic-organic composite paint.
〜１８０℃で行うことを特徴とする請求項１記載のマグ
ネシウム材の塗装方法。2. The heating and drying after the conversion coating treatment is performed at a temperature of 130.degree.
The method for coating a magnesium material according to claim 1, wherein the coating is performed at a temperature of from 180 to 180 ° C.
とする請求項１記載のマグネシウム材の塗装方法。3. The method for coating a magnesium material according to claim 1, wherein said method does not include a step of applying a primer.
マーの加水分解縮合物とシラン化合物の加水分解縮合物
と有機樹脂を含むものであることを特徴とする請求項１
記載のマグネシウム材の塗装方法。4. An inorganic-organic composite coating material comprising a hydrolysis condensate of a silicone oligomer, a hydrolysis condensate of a silane compound and an organic resin.
The coating method of the magnesium material described.
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|---|---|---|---|
| JP2001150060A JP3714192B2 (en) | 2001-05-18 | 2001-05-18 | How to paint magnesium material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001150060A JP3714192B2 (en) | 2001-05-18 | 2001-05-18 | How to paint magnesium material |
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| Publication Number | Publication Date |
|---|---|
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| JP3714192B2 JP3714192B2 (en) | 2005-11-09 |
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