JP2002180266A - Steel subjected to rust prevention treatment, powdery coating material for rust prevention and its production method - Google Patents
Steel subjected to rust prevention treatment, powdery coating material for rust prevention and its production methodInfo
- Publication number
- JP2002180266A JP2002180266A JP2000376633A JP2000376633A JP2002180266A JP 2002180266 A JP2002180266 A JP 2002180266A JP 2000376633 A JP2000376633 A JP 2000376633A JP 2000376633 A JP2000376633 A JP 2000376633A JP 2002180266 A JP2002180266 A JP 2002180266A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- rust prevention
- coating
- zinc
- coating film
- 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
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、防錆被覆されたＰ
Ｃ鋼線、鋼棒、または鉄筋などの鋼材及び被膜の防錆効
果を高めた静電塗装が可能な粉体塗料及びその製造方法
に関する。TECHNICAL FIELD The present invention relates to a rust-proof coated P
TECHNICAL FIELD The present invention relates to a powder coating material capable of electrostatic coating with enhanced rust-preventing effect on steel materials such as C-steel wire, steel rod or reinforcing steel, and a coating film, and a method for producing the same.
【０００２】[0002]
【従来の技術】鋼材の防食対策については亜鉛粉末が使
用されており、亜鉛粉末を顔料とし、有機・無機のビヒ
クルに混合したジンクリッチペイントが一般的である。
ジンクリッチペイントには、１０μｍ以下の粒度の亜鉛
粉末が使用され、主に防食塗装の下塗りとして用いら
れ、手軽に取り扱えるためよく使われている。また、鋼
材の防錆のためにエポキシ樹脂等の粉末を静電塗装する
ことがおこなわれている。2. Description of the Related Art As a countermeasure against corrosion of steel materials, zinc powder is used, and zinc-rich paint in which zinc powder is used as a pigment and mixed with an organic or inorganic vehicle is generally used.
Zinc rich paint uses zinc powder having a particle size of 10 μm or less, is mainly used as an undercoat of anticorrosion coating, and is often used because it can be easily handled. Also, powder such as epoxy resin is electrostatically coated to prevent rust of steel materials.
【０００３】特開昭５９−５２６４５号公報、特開昭５
９−１６７２４９号公報には、亜鉛粉末とＺｎ−Ｍｇ合
金粉末を含むジンクリッチペイントが、また、特開昭５
９−１９８１４２号公報には、亜鉛粉末とＺｎ−Ｍｇ合
金粉末とＭｎ粉末を含むジンクリッチペイントが開示さ
れており、Ｚｎ−Ｍｇ合金粉末がＺｎ粉末に比べて優れ
ていることが開示されている。[0003] JP-A-59-52645 and JP-A-5-52645
Japanese Patent Application Laid-Open No. 9-167249 discloses a zinc-rich paint containing zinc powder and Zn-Mg alloy powder.
JP-A-9-198142 discloses a zinc-rich paint containing zinc powder, Zn-Mg alloy powder and Mn powder, and discloses that Zn-Mg alloy powder is superior to Zn powder. .
【０００４】特開平１−３１１１７８号公報には、Ｚｎ
−Ｍｇ合金粉末の高寿命防食性能が示され、また、特開
平２−７３９３２号公報には、金属組織がＺｎとＭｇＺ
ｎ2より構成されるＺｎ−Ｍｇ合金粉末の高寿命防食性
能が開示されている。Japanese Patent Application Laid-Open No. Hei 1-311178 discloses Zn
-Shows the long life corrosion protection performance of Mg alloy powder, and JP-A-2-73932 discloses that the metal structure is Zn and MgZ.
A long life corrosion protection performance of a Zn—Mg alloy powder composed of n 2 is disclosed.
【０００５】特開平８−６０３２４号公報には、Ｚｎ−
Ｍｇ−Ａｌからなるめっき層の金属組織がＺｎとＭｇ2
Ｚｎ11のものが耐食性に優れていることが示されてい
る。特開平２−７３９３２号公報にはＭｇＺｎ2 の防食
性能について、また、特開平８−６０３２４号公報には
Ｍｇ2 Ｚｎ11の防食性能について開示されている。[0005] JP-A-8-60324 discloses that Zn-
The metal structure of the plating layer made of Mg-Al is Zn and Mg 2
It is shown that Zn 11 has excellent corrosion resistance. The corrosion performance of the MgZn 2 in JP-A-2-73932, also, Japanese Patent Laid-Open No. 8-60324 discloses a corrosion performance of the Mg 2 Zn 11.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来のジンク
リッチペイントは、塗膜強度が十分でなく、塗膜のヒビ
割れ、または塗膜形成後のダレ発生のため、厚膜塗装に
制限があり、塗膜は、最大２５０μｍ程度である。この
ために、亜鉛含有量に制限があり、使用環境によっては
亜鉛の消失速度が大きく、海岸構造物や地下水が存在す
る地中構造物などの悪環境では長期間に渡って防食性能
を発揮できない場合がある。However, the conventional zinc-rich paint does not have sufficient strength of the coating film, and cracks in the coating film or sagging after the coating film is formed. The maximum thickness of the coating film is about 250 μm. For this reason, the zinc content is limited, the rate of zinc loss is large depending on the use environment, and the anticorrosion performance cannot be exhibited for a long time in bad environments such as coastal structures and underground structures where groundwater exists There are cases.
【０００７】また、エポキシ樹脂による静電塗装は、ピ
ンホールが存在することがあり、塗装工程の最後にピン
ホール検査をおこなっているが、検出されないものがあ
り、海岸・海洋構造物また地中構造物などの苛酷な環境
下においては、年月の経過と共に腐食が進行して構造物
に重大な被害を与えることがある。In addition, pinholes may be present in the electrostatic coating with epoxy resin, and pinhole inspection is performed at the end of the coating process. However, there are some that are not detected, and there are coastal / marine structures and underground. In a severe environment such as a structure, corrosion progresses with the passage of time, which may cause serious damage to the structure.
【０００８】この発明は、種々の塗布方法に適用可能で
あり、ピンホールや傷が生じても防食性能を維持できる
塗料を提供することである。特に、金属粉末を含有する
塗料において、高い防食性能を発揮する金属の組合せを
見出すことである。また、鋼線や鋼棒の防食塗装に最適
な静電塗装が適用できる粉体塗料を提供することであ
る。[0008] The present invention is applicable to various coating methods, and it is an object of the present invention to provide a paint capable of maintaining the anticorrosion performance even if pinholes or scratches are generated. In particular, it is an object of the present invention to find a combination of metals exhibiting high anticorrosion performance in a paint containing a metal powder. It is another object of the present invention to provide a powder coating to which an electrostatic coating most suitable for anticorrosion coating of a steel wire or a steel bar can be applied.
【０００９】[0009]
【課題を解決するための手段】亜鉛粉末及びアルミニウ
ム粉末を含有する塗膜で鋼材を被覆することにより、高
い防食性能を有するようにした。ピンホールや傷が生じ
ても、亜鉛とアルミニウムの組合せにより電気化学的防
食作用が発揮され、長年月に渡って防錆効果を発揮する
ものである。亜鉛粉末とアルミニウム粉末を等重量混合
したものが樹脂バインダーに対しての分散性が非常に良
好であり、樹脂に対する金属粉末の混合比率を高くする
ことができる。特に、４０〜６０ｗｔ％の混合割合とす
ることで高い防錆効果が発揮される。Means for Solving the Problems A steel material is coated with a coating film containing zinc powder and aluminum powder so as to have high anticorrosion performance. Even if pinholes or scratches occur, the combination of zinc and aluminum exerts an electrochemical anticorrosion effect, and exhibits a rust-preventive effect over many years. A mixture in which zinc powder and aluminum powder are mixed by an equal weight has very good dispersibility in a resin binder, and can increase the mixing ratio of the metal powder to the resin. In particular, when the mixing ratio is 40 to 60 wt%, a high rust prevention effect is exhibited.
【００１０】亜鉛粉末及びアルミニウム粉末を樹脂バイ
ンダーに混合して硬化させ、硬化体を微粉砕することに
より、粉体塗装用の粉体塗料を得た。A powder coating for powder coating was obtained by mixing a zinc powder and an aluminum powder with a resin binder, curing the mixture, and pulverizing the cured product.
【００１１】亜鉛粉末及びアルミニウム粉末は、それぞ
れ、５μｍ以下であることが好ましく、樹脂バインダー
としては、エポキシ樹脂、ポリエステル樹脂、アクリル
樹脂、ウレタン樹脂等が使用できる。なかでも、エポキ
シ樹脂が好ましい。金属粉末含有の硬化体を５０μｍ以
下に粉砕するのが好ましく、大きな粒径の粉体塗料は好
ましくない。Each of the zinc powder and the aluminum powder is preferably 5 μm or less, and epoxy resin, polyester resin, acrylic resin, urethane resin and the like can be used as the resin binder. Of these, epoxy resins are preferred. It is preferable to pulverize the cured product containing the metal powder to 50 μm or less, and a powder coating having a large particle size is not preferred.
【００１２】[0012]
【実施例１】粒度１〜５μｍの亜鉛粉末３０ｗｔ％、粒
度２〜５μｍのアルミニウム粉末３０ｗｔ％とエポキシ
樹脂４０ｗｔ％の割合で混合し、ニーダで２７０〜３０
０℃で１時間混練りして亜鉛粉末とアルミニウム粉末を
均一に分散させた。混合体をニーダから取り出して常温
で自然冷却して硬化させ、金属粉末を含有する硬化体を
得た。この硬化体をペレタイザーでペレットにし、更に
粉砕機によって粉砕処理し、３０〜３５μｍの亜鉛及び
アルミニウム粉末を含む粉体塗料を得た。EXAMPLE 1 30 wt% of zinc powder having a particle size of 1 to 5 μm, 30 wt% of aluminum powder having a particle size of 2 to 5 μm, and 40 wt% of epoxy resin were mixed, and the mixture was kneaded at 270 to 30 with a kneader.
The mixture was kneaded at 0 ° C. for 1 hour to uniformly disperse the zinc powder and the aluminum powder. The mixture was taken out of the kneader, naturally cooled at room temperature and cured to obtain a cured body containing metal powder. The cured product was formed into pellets with a pelletizer, and further crushed by a crusher to obtain a powder coating containing zinc and aluminum powder of 30 to 35 μm.
【００１３】この粉体塗料を使用して、静電塗装機でＰ
Ｃ鋼線及び鋼板を２８０℃に加熱し、電圧５０ｋｖで静
電塗装した。更に２００℃で後加熱し、５０μｍの塗膜
を得た。Using this powder coating, P
C steel wire and steel plate were heated to 280 ° C. and electrostatically coated at a voltage of 50 kv. Further heating was performed at 200 ° C. to obtain a 50 μm coating film.
【００１４】塗膜の物性を試験したところ、伸び率
（％）は１３０〜１５０、硬さ（Ｈ）は２〜３であり、
耐熱性試験では２５５℃を超えたところで塗膜が黒色に
変化した。また、耐候性試験及び塩水噴霧試験に対して
異常は認められなかった。When the physical properties of the coating film were tested, the elongation (%) was 130 to 150, and the hardness (H) was 2 to 3,
In the heat resistance test, the coating film turned black when the temperature exceeded 255 ° C. No abnormality was observed in the weather resistance test and the salt spray test.
【００１５】[0015]
【実施例２】粒度１〜５μｍの亜鉛粉末２５ｗｔ％、粒
度２〜５μｍのアルミニウム粉末３５ｗｔ％とエポキシ
樹脂４０ｗｔ％の割合で５分間撹拌混合し、亜鉛及びア
ルミニウム粉末を含有する塗料を得た。Example 2 A mixture containing 25 wt% of zinc powder having a particle size of 1 to 5 μm, 35 wt% of aluminum powder having a particle size of 2 to 5 μm, and 40 wt% of an epoxy resin was stirred and mixed for 5 minutes to obtain a paint containing zinc and aluminum powder.
【００１６】この塗料に硬化剤を加えて刷毛塗りで鋼板
に塗布し、１００μｍの膜厚の被膜を形成した。同塗料
を及びフローコーティングによって鋼板に塗布し７５μ
ｍの膜厚の被膜を形成した。[0016] A curing agent was added to the paint, and the composition was applied to a steel plate by brushing to form a film having a thickness of 100 µm. Apply the paint to the steel plate by flow coating and 75μ
A film having a thickness of m was formed.
【００１７】この被膜付き鋼板を耐候性試験及び塩水噴
霧試験に対して異常は認められなかった。No abnormality was found in the coated steel sheet in the weather resistance test and the salt spray test.
【００１８】[0018]
【発明の効果】亜鉛粉末及びアルミニウム粉末の混合粉
末が樹脂に対して高い分散性を有するので、４０〜６０
ｗｔ％の高い混合で均一に分散させることができ、被膜
が高い防食性能を発揮する。ピンホールや傷が塗膜に生
じても、亜鉛とアルミニウムの組合せにより電気化学的
防食作用が長期間に渡って発揮され、海中など苛酷な環
境においても防錆効果が消失することがない。また、亜
鉛粉末とアルミニウム粉末を樹脂に混合して硬化させた
ものを粉砕することにより、電気化学的防錆機能を有す
る粉体塗料を得ることができる。According to the present invention, the mixed powder of zinc powder and aluminum powder has high dispersibility with respect to the resin.
It can be uniformly dispersed with a high mixing ratio of wt%, and the coating exhibits high anticorrosion performance. Even if pinholes or scratches occur in the coating film, the combination of zinc and aluminum exerts an electrochemical anticorrosion effect over a long period of time, and the rust prevention effect does not disappear even in a harsh environment such as underwater. In addition, a powder coating having an electrochemical rust prevention function can be obtained by crushing a mixture obtained by mixing zinc powder and aluminum powder in a resin and curing the mixture.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０９Ｄ 133/00 Ｃ０９Ｄ 133/00 163/00 163/00 201/00 201/00 Ｆターム(参考） 4F100 AB03B AB10A AB18A AK01A AK53 AR00A BA02 BA07 CC00A DE01A EH46A EJ62A GB07 JA20A JB02 JJ03 JL09 YY00A 4J038 CG001 DB001 DD001 DG001 HA066 KA05 KA20 NA03 PA02 PA03 PC02 4K044 AA02 AB02 BA10 BA21 BB01 BB11 BC02 CA22 CA24 CA27 CA29 CA53 CA62 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) C09D 133/00 C09D 133/00 163/00 163/00 201/00 201/00 F term (reference) 4F100 AB03B AB10A AB18A AK01A AK53 AR00A BA02 BA07 CC00A DE01A EH46A EJ62A GB07 JA20A JB02 JJ03 JL09 YY00A 4J038 CG001 DB001 DD001 DG001 HA066 KA05 KA20 NA03 PA02 PA03 PC02 4K044 AA02 CA02 AB02 BA10 BA21 CA02
Claims (7)
塗膜で被覆された鋼材。1. A steel material coated with a coating containing zinc powder and aluminum powder.
合物４０〜６０ｗｔ％含有する塗膜で被覆された鋼材。2. A steel material coated with a coating containing 40 to 60% by weight of an equal weight mixture of zinc powder and aluminum powder.
電塗装で形成されたものである鋼材。3. A steel material according to claim 1, wherein the coating film is formed by electrostatic powder coating.
ンダーに混合して硬化させ、硬化体を微粉砕する粉体塗
料の製造方法。4. A method for producing a powder coating in which zinc powder and aluminum powder are mixed with a resin binder and cured, and the cured product is finely pulverized.
たはアクリル樹脂のいずれかである粉体塗料の製造方
法。5. The method according to claim 4, wherein the resin is one of an epoxy resin and an acrylic resin.
粉体塗料。6. A powder coating containing zinc powder and aluminum powder.
等重量であり、４０〜６０ｗｔ％含有する粉体塗料。7. A powder coating according to claim 6, wherein zinc and aluminum are equal in weight and contain 40 to 60% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000376633A JP2002180266A (en) | 2000-12-11 | 2000-12-11 | Steel subjected to rust prevention treatment, powdery coating material for rust prevention and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000376633A JP2002180266A (en) | 2000-12-11 | 2000-12-11 | Steel subjected to rust prevention treatment, powdery coating material for rust prevention and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002180266A true JP2002180266A (en) | 2002-06-26 |
Family
ID=18845468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000376633A Pending JP2002180266A (en) | 2000-12-11 | 2000-12-11 | Steel subjected to rust prevention treatment, powdery coating material for rust prevention and its production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002180266A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299408A (en) * | 2005-03-24 | 2006-11-02 | Nippon Steel Corp | Plating method for metal band |
| EP2014725A1 (en) * | 2007-07-10 | 2009-01-14 | Sika Technology AG | Cathodic corrosion protection for reinforcing ferroconcrete structures |
| CN108467663A (en) * | 2018-05-08 | 2018-08-31 | 浙江绿环新材料科技有限公司 | A kind of Novel imitation plating powder preparation method for coating |
| CN113122103A (en) * | 2019-12-30 | 2021-07-16 | 苏州青田新材料有限公司 | Imitation electroplating powder coating and preparation method thereof |
-
2000
- 2000-12-11 JP JP2000376633A patent/JP2002180266A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299408A (en) * | 2005-03-24 | 2006-11-02 | Nippon Steel Corp | Plating method for metal band |
| JP4700537B2 (en) * | 2005-03-24 | 2011-06-15 | 新日本製鐵株式会社 | Metal strip plating method |
| EP2014725A1 (en) * | 2007-07-10 | 2009-01-14 | Sika Technology AG | Cathodic corrosion protection for reinforcing ferroconcrete structures |
| WO2009007413A1 (en) * | 2007-07-10 | 2009-01-15 | Sika Technology Ag | Cathode corrosion protection for reinforcements of reinforced concrete structures |
| CN108467663A (en) * | 2018-05-08 | 2018-08-31 | 浙江绿环新材料科技有限公司 | A kind of Novel imitation plating powder preparation method for coating |
| CN113122103A (en) * | 2019-12-30 | 2021-07-16 | 苏州青田新材料有限公司 | Imitation electroplating powder coating and preparation method thereof |
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