JPH06136295A - Coating composition for preventing contact corrosion of different metals and method for preventing contact corrosion of different metals - Google Patents
Coating composition for preventing contact corrosion of different metals and method for preventing contact corrosion of different metalsInfo
- Publication number
- JPH06136295A JPH06136295A JP28765392A JP28765392A JPH06136295A JP H06136295 A JPH06136295 A JP H06136295A JP 28765392 A JP28765392 A JP 28765392A JP 28765392 A JP28765392 A JP 28765392A JP H06136295 A JPH06136295 A JP H06136295A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- corrosion
- metals
- preventing
- contact corrosion
- 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]
【産業上の利用分野】本発明は、異種金属接触腐食防止
用塗料組成物および異種金属接触腐食防止方法に関し、
特に、自動車車体に用いる異種金属接触時の腐食を防止
するための腐食防止用塗料組成物および腐食防止方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition for contact corrosion prevention of dissimilar metals and a method for preventing contact corrosion of dissimilar metals,
In particular, the present invention relates to a corrosion-preventing coating composition and a corrosion-preventing method for preventing corrosion when different metals are used in an automobile body.
【０００２】[0002]
【従来の技術】一般に異なる金属を積層または張合わせ
て用いる場合に、異種金属が接触することにより腐食
（電食）が発生することが知られている。例えば、自動
車の車体等は、アルミニウム材と鋼材とを積層して用い
るものが多くなり、この様な異種金属の接触による腐食
が問題となっている。この様な異種金属の接触による腐
食は、金属のイオン化傾向の違いによってこの金属間に
酸素、塩素等の不純物の混じった水等が在るとこの水等
を介して金属間に電子の移動が生じ、これにより金属に
腐食が発生するものである。2. Description of the Related Art Generally, it is known that when different metals are stacked or laminated, corrosion (electrolytic corrosion) occurs due to contact between different metals. For example, an automobile body and the like are often used by laminating an aluminum material and a steel material, and corrosion due to contact of such dissimilar metals is a problem. Corrosion due to the contact of such dissimilar metals is caused by the difference in the ionization tendency of the metals, and when there is water mixed with impurities such as oxygen and chlorine due to the difference in the ionization tendency of the metals, the transfer of electrons between the metals through the water etc. This causes corrosion of the metal.
【０００３】従来この様な異種金属接触による腐食を防
止するために、腐食域に腐食原因となる酸化物や水等が
入らないように完全にシールしたり、また、アルミニウ
ム材と鋼材との間を電気的に絶縁することにより、異種
金属接触腐食の防止を行っている。前者のシールする方
法は、腐食域を完全にシールすることが難しく、腐食防
止対策としては、後者のような金属間に絶縁物を介して
サンドイッチ状に積層する方法が多く用いられている。Conventionally, in order to prevent such corrosion due to contact with dissimilar metals, a complete seal is provided to prevent corrosion-causing oxides, water, etc. from entering the corrosive region, and a gap between an aluminum material and a steel material. By electrically insulating the metal, corrosion of contact with dissimilar metals is prevented. It is difficult for the former sealing method to completely seal the corroded area, and as a corrosion prevention measure, a method of laminating sandwiches between metals with an insulator interposed between them is often used.
【０００４】しかしながら、この様な異なる金属と金属
の間に絶縁物を挟む方法は、自動車車体に下地塗装方法
として用いられている電着塗装では、アルミニウム材と
鋼材が絶縁されているために、どちらか一方だけに通電
するだけでは全体を塗装することができず、アルミニウ
ム材と鋼材でそれぞれ独立に電極を取付ける必要がある
ため、電極の数が多くなり、工程での生産性が低下する
という問題がある。However, such a method of sandwiching an insulator between different metals is a problem in that the aluminum material and the steel material are insulated in the electrodeposition coating used as a base coating method for automobile bodies. It is not possible to paint the whole by energizing only one of them, and it is necessary to attach electrodes separately for aluminum material and steel material, so the number of electrodes increases and productivity in the process decreases. There's a problem.
【０００５】[0005]
【発明が解決しようとする課題】そこで本発明の目的
は、電着塗装時に多数の電極をもちいることなく、異種
金属接触による金属腐食を防止するための異種金属接触
腐食防止用塗料組成物および異種金属接触腐食防止方法
を提供することである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a coating composition for preventing dissimilar metal contact corrosion for preventing metal corrosion due to dissimilar metal contact without using many electrodes during electrodeposition coating. Another object of the present invention is to provide a method for preventing corrosion of dissimilar metal contacts.
【０００６】[0006]
【課題を解決するための手段】上記諸目的は、塗料中に
２硫化モリブデン（ＭｏＳ2 ）を樹脂固形分１００重量
部に対して５〜３５重量部含むことを特徴とする異種金
属接触腐食防止用塗料組成物により達成される。[Means for Solving the Problems] The above-mentioned various objects are to prevent corrosion of different metals by coating the coating material with 5 to 35 parts by weight of molybdenum disulfide (MoS 2 ) per 100 parts by weight of the resin solid content. It is achieved by a coating composition for use.
【０００７】また上記諸目的は、第１の金属材料または
第２の金属材料の少なくとも一方の金属材料の少なくと
も片方の面に、２硫化モリブデンを樹脂固形分１００重
量部に対して５〜３５重量部含む塗装膜を形成し、該塗
装膜を介して該第１の金属材料と第２の金属材料を積層
することを特徴とする異種金属接触腐食防止方法によっ
ても達成される。Further, the above-mentioned various objects are to use molybdenum disulfide on at least one surface of at least one of the first metal material and the second metal material in an amount of 5 to 35 parts by weight based on 100 parts by weight of the resin solid content. It is also achieved by a method of preventing corrosion of a dissimilar metal contact, which comprises forming a coating film including a portion and laminating the first metal material and the second metal material through the coating film.
【０００８】[0008]
【作用】本発明は、塗料中に、塗料組成物として２硫化
モリブデンを含有させることにより、得られる塗膜は、
異種金属接触によって生じる腐食の原因となる約１Ｖ程
度の電圧が加わったときには、通電性を示さず絶縁体を
して働くため、異種金属間で起こるイオン化傾向の差で
ある約１Ｖ程度の電気は完全に遮断されるため電子は移
動することができず腐食を防止することができ、電着塗
装時の約２００Ｖ以上の電圧が加わったときには、通電
性を示すものである。In the present invention, the coating film obtained by incorporating molybdenum disulfide as a coating composition into the coating composition is
When a voltage of about 1 V, which causes corrosion caused by contact with dissimilar metals, is applied, it does not show electrical conductivity and acts as an insulator, so electricity of about 1 V, which is the difference in ionization tendency that occurs between dissimilar metals, is generated. Since the electrons are completely cut off, the electrons cannot move and corrosion can be prevented, and when a voltage of about 200 V or more during electrodeposition coating is applied, the electrons show conductivity.
【０００９】塗膜としてこの様な特性が得られる塗料組
成物を含有させた塗料を異種金属の少なくとも一方の金
属材料の少なくとも片方の面に塗装し、この塗装面の塗
膜を挾んで、異なる金属を積層または張合わせることに
より、異種金属接触による腐食が発生せず、電着塗装時
には塗膜は導電体として働くために、電極を異なる金属
材料の少なくともどちらか一点に設ければ電着塗装を行
うことができるものである。As a coating film, a coating composition containing a coating composition capable of obtaining such characteristics is coated on at least one surface of at least one metal material of different metals, and the coating film on the coated surface is sandwiched to obtain a different coating. By laminating or laminating metals, corrosion due to contact with dissimilar metals does not occur, and the coating film acts as a conductor during electrodeposition coating.Therefore, if electrodes are provided on at least one of different metal materials, electrodeposition coating Is what you can do.
【００１０】本発明においては、塗料中に２硫化モリブ
デンが樹脂固形分１００重量部に対して５〜３５重量部
（好ましくは５〜２０重量部）含有していればよく、ベ
ースレジンの種類、硬化剤の種類等、他の内容について
は特に限定されず、塗料分野で通常もちいることのでき
るものであればよい。なお、塗料中の２硫化モリブデン
の量が５重量部未満の場合には異種金属接触による腐食
の防止性はあるものの、電着塗装時においても導電性を
示さないために電着塗装できず、一方、３５重量部を越
えると異種金属接触による腐食を防止することができな
くなってしまう。In the present invention, the paint should contain molybdenum disulfide in an amount of 5 to 35 parts by weight (preferably 5 to 20 parts by weight) per 100 parts by weight of the resin solid content. The other contents such as the type of the curing agent are not particularly limited, and any one can be used as long as it can be usually used in the field of paints. If the amount of molybdenum disulfide in the paint is less than 5 parts by weight, it has the property of preventing corrosion due to contact with dissimilar metals, but since it does not show conductivity even during electrodeposition coating, it cannot be electrodeposition coated. On the other hand, if it exceeds 35 parts by weight, it becomes impossible to prevent corrosion due to contact with different metals.
【００１１】本発明において使用される硬化性樹脂とし
ては、アクリル樹脂、ポリエステル樹脂、アルキド樹
脂、エポキシ樹脂、ウレタン樹脂等のベースレジンをあ
げることができ、硬化剤としては、メラミン、イリシア
ネート、ジシアン、ジアミド等が用いられる。The curable resin used in the present invention may be a base resin such as an acrylic resin, a polyester resin, an alkyd resin, an epoxy resin or a urethane resin. The curing agent may be melamine, iriocyanate or dicyan. , Diamide and the like are used.
【００１２】また、本発明においては、塗料分野で通常
用いることのできる熱可塑性樹脂を用いることも可能
で、例えば塩素化ポリエチレン、塩素化ポリプロピレ
ン、塩化ビニル、酢酸ビニル、塩化ビニリデンおよびこ
れらを共重合したビニル樹脂、セルロース系樹脂、アセ
タール樹脂、アルキド樹脂、塩化ゴム系樹脂等をあげる
ことができる。In the present invention, it is also possible to use a thermoplastic resin which is usually used in the field of paints, for example, chlorinated polyethylene, chlorinated polypropylene, vinyl chloride, vinyl acetate, vinylidene chloride and copolymerization thereof. Examples thereof include vinyl resins, cellulose resins, acetal resins, alkyd resins, and chlorinated rubber resins.
【００１３】本発明の塗料組成物は、異種金属の間の塗
膜として用いられるものであるから、塗料として着色を
目的としたものではないが、必要により塗料分野で通常
用いることのできる着色顔料を加えることも可能であ
り、例えば二酸化チタン、酸化鉄（赤サビ、エロー）、
カーボンブラック、クロム酸エロー、フタロシアニンブ
ルー、フタロシアニングリーン、キナクリドン等の有
機、無機の各種着色顔料をあげることができ、また、沈
降性炭酸カルシウム、硫酸バリウム、タルク、クレー、
ホワイトカーボン等の体質顔料、ジンククロメート、ス
トロンチウムクロメート、鉛丹、亜酸化鉛、塩基性クロ
ム酸鉛、シアナミド鉛、鉛酸カルシウム、リン酸亜鉛、
リン酸アルミニウム、リン酸カルシウム、金属亜鉛末と
ガラスフレーク粉末の混合物等の防食防錆顔料、メタリ
ック感を出すためのフレーク状アルミニウム末ペース
ト、チタンコーティングマイカ粉等の光輝性顔料、蛍光
塗料等に用いる各種蛍光剤等の特殊顔料、亜酸化銅等の
防汚顔料等を添加してもよく、さらに、塗膜の電着塗装
時の通電性を上げるために、例えば導電性酸化亜鉛、導
電性カーボン、導電性酸化錫、グラファイト、三四酸化
鉄、硫化亜鉛、金属粉（Ａｌ等）などの導電性顔料を添
加しても差し支えないが、その添加料については本発明
の作用である約１Ｖ以下の弱電圧時の絶縁性がそこなわ
れないような添加量とすべきである。The coating composition of the present invention is not intended for coloring as a coating because it is used as a coating film between different kinds of metals, but if necessary, a coloring pigment that can be usually used in the coating field is used. It is also possible to add, for example titanium dioxide, iron oxide (red rust, yellow),
Carbon black, yellow chromate, phthalocyanine blue, phthalocyanine green, quinacridone, and various organic and inorganic coloring pigments can be mentioned, and also precipitated calcium carbonate, barium sulfate, talc, clay,
Extender pigments such as white carbon, zinc chromate, strontium chromate, red lead, lead suboxide, basic lead chromate, lead cyanamide, calcium leadate, zinc phosphate,
Aluminum phosphate, calcium phosphate, anticorrosion and rust pigments such as a mixture of metallic zinc powder and glass flake powder, flaky aluminum powder paste for giving a metallic feeling, bright pigments such as titanium-coated mica powder, fluorescent paints, etc. A special pigment such as a fluorescent agent, an antifouling pigment such as cuprous oxide, or the like may be added, and further, in order to improve the electrical conductivity during electrodeposition coating of the coating film, for example, conductive zinc oxide, conductive carbon, It is possible to add a conductive pigment such as conductive tin oxide, graphite, iron tetroxide, zinc sulfide, and metal powder (Al, etc.), but the additive is about 1 V or less, which is the effect of the present invention. The amount of addition should be such that the insulation at low voltage is not compromised.
【００１４】本発明において用いることのできる溶剤と
しては、塗料分野で通常用いることのできるもので各種
有機溶剤や、水等を適宜用いることができる。As the solvent which can be used in the present invention, those which are usually used in the field of coating materials, various organic solvents, water and the like can be appropriately used.
【００１５】その他に、各種添加剤として、塗料分野で
通常用いることのできる硬化触媒、紫外線吸収剤、酸化
防止剤、表面調整剤、タレ止め剤、増粘剤、潤滑剤等を
添加しても差し支えない。In addition, as various additives, a curing catalyst, an ultraviolet absorber, an antioxidant, a surface conditioner, an anti-sagging agent, a thickener, a lubricant or the like which can be usually used in the paint field may be added. It doesn't matter.
【００１６】本発明の塗料組成物を用いて、塗装を実施
できる金属材料の種類としては、例えば、鋼板、亜鉛め
っき鋼板、亜鉛ー鉄合金めっき鋼板、亜鉛ーニッケル合
金めっき鋼版、亜鉛合金めっき鋼版、ステンレス鋼板、
アルミニウム板等があげられる。Examples of the type of metal material that can be coated using the coating composition of the present invention include steel plates, galvanized steel plates, zinc-iron alloy plated steel plates, zinc-nickel alloy plated steel plates, and zinc alloy plated steel plates. Plate, stainless steel plate,
Examples include aluminum plates.
【００１７】本発明において塗装方法は、特に限定され
ず、エアスプレー塗装、エアレススプレー塗装、バーコ
ート、ロールコート、ディッピング、電着塗装、刷毛塗
り等の通常の塗装方法等が用いられ、積層する異種金属
のどちらか一方または両方の金属材料の、積層する面側
（塗膜を金属で挾みサンドチイチ状とする）に塗膜膜厚
１〜１００μｍ、好ましくは５〜３０μｍ程度となるよ
うに塗装することが望ましい。In the present invention, the coating method is not particularly limited, and ordinary coating methods such as air spray coating, airless spray coating, bar coating, roll coating, dipping, electrodeposition coating, brush coating and the like are used and laminated. Coating so that the coating film thickness is 1 to 100 μm, preferably 5 to 30 μm on the laminating surface side (the coating film is sandwiched by the metal to form a sand chichi) of one or both of different kinds of metals. It is desirable to do.
【００１８】[0018]
【実施例】以下、本発明を実施例により具体的に説明す
る。EXAMPLES The present invention will be specifically described below with reference to examples.
【００１９】エポキシ系樹脂を溶剤で溶解した後、表１
に示すように、ＭｏＳ2 およびＳｉＯ2 を加えてよく攪
拌しサンドミル、ローラーミル等の分散機で分散し塗料
化した。After the epoxy resin was dissolved in a solvent, Table 1
As shown in (1), MoS 2 and SiO 2 were added and well stirred, and dispersed by a disperser such as a sand mill or a roller mill to form a paint.
【００２０】[0020]
【表１】 [Table 1]
【００２１】次に、それぞれ調整した塗料を脱脂した冷
間圧延鋼板（ＳＰＣＣ）板（１５０ｍｍ×７０ｍｍ×
０．８ｍｍ）の片面に膜厚５μｍの塗膜が形成されるよ
うにスプレー塗装し、温度２２０℃で、６０時間焼付け
た。Next, a cold rolled steel plate (SPCC) plate (150 mm × 70 mm ×) in which the adjusted paints have been degreased
(0.8 mm) was spray-coated so that a coating film having a film thickness of 5 μm was formed on one surface and baked at a temperature of 220 ° C. for 60 hours.
【００２２】次に、この塗装面上にＡｌ板（５０００
系；１５０ｍｍ×７０ｍｍ×１．０ｍｍ）を重ね合わ
せ、樹脂ボルトで固定し、ＳＰＣＣ板の未塗装面に電極
の接点を取り、電着用途料（神東塗料（株）製、サクセ
ードＮｏ．７０１）を２５０Ｖ３分、２５℃の条件で電
着塗装を行い、その後未塗装部分を塗装して試験片を作
成した。この時、ＳＰＣＣ板上の塗膜膜厚が２０μｍと
なり、Ａｌ板上の塗膜膜厚が１５μｍ以上を良好（○）
として評価した。結果を表１に示す。Next, on this coated surface, an Al plate (5000
System; 150 mm x 70 mm x 1.0 mm) are overlaid, fixed with resin bolts, the electrode contacts are made on the unpainted surface of the SPCC plate, and the electrodeposition charge (Shinto Paint No. 701, manufactured by Shinto Paint Co., Ltd.). ) Was subjected to electrodeposition coating under the conditions of 250V for 3 minutes at 25 ° C., and then the unpainted portion was coated to prepare a test piece. At this time, the coating film thickness on the SPCC plate was 20 μm, and the coating film thickness on the Al plate was 15 μm or more (good).
Evaluated as. The results are shown in Table 1.
【００２３】さらに、上述の試験片を用いて、複合腐食
試験を行い異種金属接触腐食防止性の評価を行った。結
果を表２に示す。また、図１に２硫化モリブデンの含有
量に対する複合試験でのＡｌ板の最大腐食深さとの関係
を示す。なお、複合腐食試験は、塩水噴霧２時間、乾燥
２時間、湿潤２時間を１サイクルとする試験をくり返し
１００回行なった。Further, using the above-mentioned test piece, a composite corrosion test was conducted to evaluate the corrosion resistance against dissimilar metal contact. The results are shown in Table 2. Further, FIG. 1 shows the relationship between the content of molybdenum disulfide and the maximum corrosion depth of the Al plate in the composite test. In the complex corrosion test, a test in which salt spray was 2 hours, drying was 2 hours, and wetting was 2 hours was one cycle was repeated 100 times.
【００２４】[0024]
【表２】 [Table 2]
【００２５】表２および図１より、塗料中に２硫化モリ
ブデンを樹脂固形分１００重量部に対して５〜３５重量
部含有させた場合に電着塗装性および異種金属腐食防止
性が共によいことが分かる。From Table 2 and FIG. 1, when molybdenum disulfide is contained in the paint in an amount of 5 to 35 parts by weight based on 100 parts by weight of the resin solid content, both the electrodeposition coating property and the dissimilar metal corrosion prevention property are good. I understand.
【００２６】[0026]
【発明の効果】本発明により、例えば、アルミニウム材
と鋼材等のように異なる金属の接触による異種金属腐食
防止のための塗装部位が増えても、その後の電着塗装の
際に電極となる接点を増やすことなく電着塗装を実施す
ることができる。EFFECTS OF THE INVENTION According to the present invention, even if the number of coating parts for preventing corrosion of dissimilar metals due to contact of different metals such as aluminum material and steel material increases, a contact point to be an electrode in the subsequent electrodeposition coating is provided. It is possible to perform electrodeposition coating without increasing the number.
【図１】 ２硫化モリブデンの含有量に対する複合腐食
試験でのＡｌ板の最大腐食深さとの関係を示す図面であ
り、縦軸は複合腐食試験後の最大腐食深さ（ｍｍ）、横
軸は２硫化モリブデンの含有量（重量部）である。FIG. 1 is a drawing showing the relationship between the content of molybdenum disulfide and the maximum corrosion depth of an Al plate in a complex corrosion test, the vertical axis being the maximum corrosion depth after the complex corrosion test (mm), and the horizontal axis being the horizontal axis. It is the content (parts by weight) of molybdenum disulfide.
フロントページの続き (72)発明者 池平 昭夫 兵庫県神戸市北区ひよどり台３丁目２番２ −402 (72)発明者 国則 武司 大阪府堺市上野芝町１丁目14−14Front Page Continuation (72) Inventor Akio Ikehira 3-2-2-402 Hiyodoridai, Kita-ku, Kobe-shi, Hyogo Prefecture (72) Inventor Takeshi Kuninori 1-14-14 Uenoshiba-cho, Sakai City, Osaka Prefecture
Claims (2)
１００重量部に対して５〜３５重量部含むことを特徴と
する異種金属接触腐食防止用塗料組成物。1. A coating composition for preventing dissimilar metal contact corrosion, wherein the coating contains 5 to 35 parts by weight of molybdenum disulfide with respect to 100 parts by weight of resin solid content.
少なくとも一方の金属材料の少なくとも片方の面に、２
硫化モリブデンを樹脂固形分１００重量部に対して５〜
３５重量部含む塗装膜を形成し、該塗装膜を介して該第
１の金属材料と第２の金属材料を積層することを特徴と
する異種金属接触腐食防止方法。2. At least one surface of at least one of the first metallic material and the second metallic material is provided with 2
5 to 5 parts by weight of molybdenum sulfide to 100 parts by weight of resin solid content
A method for preventing corrosion of dissimilar metal contacts, which comprises forming a coating film containing 35 parts by weight and laminating the first metal material and the second metal material through the coating film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28765392A JPH06136295A (en) | 1992-10-26 | 1992-10-26 | Coating composition for preventing contact corrosion of different metals and method for preventing contact corrosion of different metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28765392A JPH06136295A (en) | 1992-10-26 | 1992-10-26 | Coating composition for preventing contact corrosion of different metals and method for preventing contact corrosion of different metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06136295A true JPH06136295A (en) | 1994-05-17 |
Family
ID=17719993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28765392A Pending JPH06136295A (en) | 1992-10-26 | 1992-10-26 | Coating composition for preventing contact corrosion of different metals and method for preventing contact corrosion of different metals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06136295A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6368718B1 (en) * | 1998-11-21 | 2002-04-09 | Daimlerchrysler Ag | Structural steel elements coated with anticorrosive coatings and process for welding the same |
| JP2002275424A (en) * | 2001-03-21 | 2002-09-25 | Nippon Paint Co Ltd | Bright coating composition, method for forming coating film and multilayered coating film |
| JP2004083771A (en) * | 2002-08-28 | 2004-03-18 | Nippon Hyomen Kagaku Kk | Composition for metal-protective film formation |
| JP2007147085A (en) * | 2007-02-19 | 2007-06-14 | Ntn Corp | Rolling bearing |
| CN108753109A (en) * | 2018-06-22 | 2018-11-06 | 歌尔股份有限公司 | The application of dissimilar metal product and anti-fingerprint oil in dissimilar metal product |
-
1992
- 1992-10-26 JP JP28765392A patent/JPH06136295A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6368718B1 (en) * | 1998-11-21 | 2002-04-09 | Daimlerchrysler Ag | Structural steel elements coated with anticorrosive coatings and process for welding the same |
| JP2002275424A (en) * | 2001-03-21 | 2002-09-25 | Nippon Paint Co Ltd | Bright coating composition, method for forming coating film and multilayered coating film |
| JP2004083771A (en) * | 2002-08-28 | 2004-03-18 | Nippon Hyomen Kagaku Kk | Composition for metal-protective film formation |
| JP2007147085A (en) * | 2007-02-19 | 2007-06-14 | Ntn Corp | Rolling bearing |
| JP4606427B2 (en) * | 2007-02-19 | 2011-01-05 | Ｎｔｎ株式会社 | Rolling bearing |
| CN108753109A (en) * | 2018-06-22 | 2018-11-06 | 歌尔股份有限公司 | The application of dissimilar metal product and anti-fingerprint oil in dissimilar metal product |
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