JP2002167677A - Rust stabilization treating agent for steel products and rust stabilization treated steel products - Google Patents
Rust stabilization treating agent for steel products and rust stabilization treated steel productsInfo
- Publication number
- JP2002167677A JP2002167677A JP2000360739A JP2000360739A JP2002167677A JP 2002167677 A JP2002167677 A JP 2002167677A JP 2000360739 A JP2000360739 A JP 2000360739A JP 2000360739 A JP2000360739 A JP 2000360739A JP 2002167677 A JP2002167677 A JP 2002167677A
- Authority
- JP
- Japan
- Prior art keywords
- rust
- treating agent
- agent
- steel products
- rust stabilization
- 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
Links
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Paints Or Removers (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、錆安定化処理剤お
よび前記処理剤の乾燥皮膜が形成された錆安定化処理鋼
材に関する。より具体的には、Cu,Ni,Cr,P,Mo等の合金
元素を添加してなる耐候性鋼材に主として適用される表
面処理剤であって、特に飛来塩分の多い海岸地域や、冬
季に凍結防止塩を散布する地域などにおいても、耐候性
鋼の安定錆を効率よく生成せしめることを目的とした錆
安定化処理剤および錆安定化処理鋼材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust stabilizing agent and a rust stabilizing steel having a dry film formed of the agent. More specifically, Cu, Ni, Cr, P, is a surface treatment agent mainly applied to weathering steel material added with alloying elements such as Mo, especially in coastal areas with a lot of flying salt, in winter The present invention relates to a rust stabilizing agent and a rust stabilizing steel for the purpose of efficiently generating stable rust of weathering steel even in an area where a deicing salt is sprayed.
【０００２】[0002]
【従来の技術】耐候性鋼はCu,Ni,Cr,P,Mo等の元素が少
量含有された低合金鋼であって、大気中に暴露すると腐
食し発錆する過程で保護性の強い錆層（安定錆）が自然
に形成される。そして前記錆層が形成された後はそれ以
降の鋼材の腐食は減少し、最終的には腐食が殆ど進行し
ない特性を持つ鋼材となる。2. Description of the Related Art Weather-resistant steel is a low alloy steel containing a small amount of elements such as Cu, Ni, Cr, P, and Mo. A layer (stable rust) forms spontaneously. Then, after the rust layer is formed, the corrosion of the steel material thereafter is reduced, and finally the steel material has the characteristic that the corrosion hardly progresses.
【０００３】この様な耐候性鋼材は、形鋼、鋼板、鋼管
等各種鋼材に適用され、橋梁や鉄塔等の構造物として幅
広い用途があるが、次のような問題を有していた。[0003] Such a weather-resistant steel material is applied to various steel materials such as a shaped steel, a steel plate and a steel pipe, and has a wide range of uses as a structure such as a bridge or a steel tower, but has the following problems.
【０００４】即ち、耐候性鋼材を裸使用する場合、鋼材
表面に保護性の強い安定した錆が形成されるまで5年以
上の長期間を要し、その間、浮き錆や流れ錆を生じ、流
出した錆汁により周囲環境を汚染し、外観を損なう問題
があった。That is, when a weather-resistant steel material is used barely, it takes a long period of 5 years or more until stable rust with strong protection is formed on the surface of the steel material. There is a problem that the rusted juice contaminates the surrounding environment and impairs the appearance.
【０００５】そこで、耐候性鋼の表面に錆安定化処理と
称される表面処理を行い、上記の問題を解決する技術が
開示されている。この錆安定化処理は、例えば、特開昭
56-127774号公報では、カチオン型皮膜とアニオン型皮
膜の2層皮膜が、特公昭56-33991号公報では、下層に安
定錆成分を含有する樹脂層、上層に耐候性、耐腐食性に
優れた樹脂層を設けた2層被覆が、および特許2666673号
公報では、安定錆形成促進作用を有する有機樹脂により
被覆された鋼材について開示されている。Therefore, a technique has been disclosed which solves the above problem by performing a surface treatment called a rust stabilization treatment on the surface of the weatherable steel. This rust stabilization treatment is described in, for example,
In 56-127774, a two-layer film consisting of a cationic film and an anionic film is used.In Japanese Patent Publication No. 56-33991, the lower layer contains a resin layer containing a stable rust component, and the upper layer has excellent weather resistance and corrosion resistance. JP-A-2266667 discloses a steel material coated with an organic resin having a stable rust formation promoting action.
【０００６】[0006]
【発明が解決しようとする課題】しかるに、上記従来技
術の内、特公昭56-33991号公報による方法では、安定錆
形成過程の塗膜劣化過程での外観が悪く、塗膜のフクレ
や剥離が発生し易い欠点がある。更に飛来塩分に対する
対応が不十分で、腐食性の厳しい環境での安定錆形成能
力が劣る欠点がある。また2層以上の塗装が必要で、塗
装作業性、塗装コストが上昇する欠点がある。However, of the above prior art, the method according to Japanese Patent Publication No. 56-33991 has a poor appearance in the process of deterioration of the coating film during the formation of stable rust, and causes blistering and peeling of the coating film. There are drawbacks that are likely to occur. Further, there is a disadvantage that the ability to form a stable rust in an environment having severe corrosiveness is inferior due to insufficient response to flying salt. Further, two or more layers of coating are required, and there is a drawback that coating workability and coating cost increase.
【０００７】また特許2666673号公報では、安定錆を早
期に形成するため、処理後の外観不良が避けられず、流
れ錆等による周辺環境の汚損も問題となる。また早期に
形成した錆が真の安定錆として長期間機能するかどう
か、不明確である。In Japanese Patent No. 2,666,673, since stable rust is formed at an early stage, poor appearance after processing is inevitable, and contamination of the surrounding environment due to flowing rust or the like is also a problem. It is also unclear whether the rust formed earlier functions as true stable rust for a long time.
【０００８】特開昭56-127774号公報記載の方法では、
カチオン型皮膜で流れ錆を防止し、アニオン型皮膜で塩
分に対する耐久性を増していることで、安定錆形成環境
を整え、効率的な安定錆形成を意図したものであるが、
2層以上の異なる塗膜を形成する必要があり、塗装作業
性上問題がある。また安定錆形成能力とのバランス上、
アニオン型皮膜の割合に制限があり、十分な耐飛来塩分
性が発揮できない点も問題であった。In the method described in JP-A-56-127774,
The cation-type coating prevents flow rust and the anion-type coating increases the durability against salt, thereby preparing a stable rust formation environment and aiming for efficient stable rust formation.
It is necessary to form two or more different coating films, and there is a problem in coating workability. Also, due to the balance with the ability to form stable rust,
There is also a problem in that the ratio of the anion type coating is limited, and sufficient anti-flying salt cannot be exhibited.
【０００９】また、これまでの錆安定化処理剤は長期的
に塗膜表面に蓄積された汚れ等により、外観上問題とな
るばかりか、付着物を基点とした不安定錆の形成などの
問題もある。Further, the conventional rust stabilizing agents not only cause a problem in appearance due to dirt accumulated on the surface of the coating film for a long term, but also a problem such as formation of unstable rust based on deposits. There is also.
【００１０】本発明は、上記の課題を解決するためにな
されたものであって、特に飛来塩分の多い海岸地域や、
冬季に凍結防止塩を散布する地域などにおいても、耐候
性鋼の安定錆を効率よく生成せしめると共に、安定錆形
成過程での流れ錆等による外観不良を防止し、あるいは
更に処理剤皮膜下に安定錆を形成する際の塗膜のフクレ
や剥離による外観悪化を極めて起こりにくくすることを
目的とした耐候性鋼の錆安定化処理剤、およびその処理
剤の硬化皮膜が形成された錆安定化処理鋼材を提供する
ことを目的とするものである。[0010] The present invention has been made to solve the above-mentioned problems, and is particularly useful in coastal areas with high incoming salt,
In areas where anti-freezing salt is sprayed in winter, stable rust of weather-resistant steel is efficiently generated, and appearance defects due to flowing rust during the formation of stable rust are prevented, or stable under the treatment agent film. A rust stabilizing agent for weather-resistant steel for the purpose of minimizing appearance deterioration due to blistering and peeling of the coating film when forming rust, and a rust stabilizing treatment with a cured film of the treating agent formed It is intended to provide a steel material.
【００１１】[0011]
【課題を解決するための手段】即ち、本発明は、(1)処
理剤中に光触媒型親水性付与剤を含有することを特徴と
する鋼材の錆安定化処理剤、(2)前記光触媒型親水性付
与剤が酸化チタンであることを特徴とする前記(1）に記
載の錆安定化処理剤、(3)前記光触媒型親水性付与剤が
処理剤固形分100重量部中に2〜20重量部含有されている
ことを特徴とする前記(1)または(2)に記載の錆安定化処
理剤、(4)前記(1)〜(3)記載の処理剤の乾燥皮膜を表面
に形成してなる錆安定化処理鋼材、である。That is, the present invention provides (1) a rust stabilizing agent for steel materials, which comprises a photocatalytic hydrophilicity imparting agent in the treating agent, and (2) the photocatalytic agent. The rust stabilizing agent according to the above (1), wherein the hydrophilicity-imparting agent is titanium oxide, (3) the photocatalytic hydrophilicity-imparting agent is 2 to 20 in 100 parts by weight of the solid content of the treating agent. The rust stabilizing agent according to the above (1) or (2), wherein the dry film of the treating agent according to the above (1) to (3) is formed on the surface by weight part. Rust stabilizing steel material.
【００１２】本発明では、光により処理皮膜表面に親水
性を付与する光触媒型親水性付与材を含有することによ
り、付着した塩分などの安定錆形成を阻害する成分を自
己洗浄すると共に、汚れなども分解して汚れを基点とし
た錆の不安定化を防止する。また光触媒の作用により錆
安定化処理塗膜自体の分解、風化も促進されることで、
良好な風化外観を得ることも出来る。In the present invention, by containing a photocatalytic hydrophilicity-imparting material that imparts hydrophilicity to the surface of the treated film by light, components that inhibit the formation of stable rust such as attached salts are self-cleaned, and dirt and the like are removed. To prevent rust instability based on dirt. In addition, by the action of the photocatalyst, decomposition and weathering of the rust stabilization coating film itself are promoted,
Good weathered appearance can also be obtained.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を詳細
に説明する。 （適用可能鋼材）本発明の錆安定化処理剤が適用可能な
鋼材は特に限定するものではない。普通鋼に対しても効
果は認められるが、耐候性鋼のようなCu,Ni,Cr,P,Mo等
の合金元素を少量含む低合金鋼に対して特に有効であ
る。また、処理面はブラスト処理等で表面のスケールや
錆を落とした状態が好ましいが、必ずしもこの必要はな
い。 (光触媒型親水性付与剤)本発明の錆安定化処理剤に含有
される光触媒型親水性付与剤は、特定の励起波長の紫外
線や可視光線があたることにより、スーパーオキシドア
ニオンやヒドロキシラジカルなどの活性酸素を生成しう
る化合物で、光触媒の活性酸素により表面に付着した疎
水性の汚れを分解し、塗膜表面に物理吸着水の層を形成
することで表面親水性付与作用を有すると考えられてい
る物質である。例えば酸化チタン、酸化亜鉛、酸化錫、
酸化鉄、酸化クロム、酸化モリブデン、酸化銅、酸化マ
ンガン、など一連の金属酸化物、およびチタン酸ストロ
ンチウムなどの化合物が挙げられるが、これらの化合物
の中で特に酸化チタン、その中でも結晶型がアナターゼ
型である酸化チタンが特に顕著な効果を示す。Embodiments of the present invention will be described below in detail. (Applicable Steel Materials) Steel materials to which the rust stabilizing agent of the present invention can be applied are not particularly limited. Although the effect is recognized for ordinary steel, it is particularly effective for low alloy steel such as weathering steel containing a small amount of alloying elements such as Cu, Ni, Cr, P, and Mo. Further, the treated surface is preferably in a state where scale and rust on the surface have been removed by blasting or the like, but this is not always necessary. (Photocatalytic hydrophilicity imparting agent) The photocatalytic hydrophilicity imparting agent contained in the rust stabilizing agent of the present invention is exposed to ultraviolet light or visible light having a specific excitation wavelength, such as a superoxide anion or a hydroxyl radical. It is a compound that can generate active oxygen.It is thought to have the function of imparting surface hydrophilicity by decomposing hydrophobic dirt attached to the surface by the active oxygen of the photocatalyst and forming a layer of physically adsorbed water on the coating film surface Substance. For example, titanium oxide, zinc oxide, tin oxide,
A series of metal oxides such as iron oxide, chromium oxide, molybdenum oxide, copper oxide, and manganese oxide, and compounds such as strontium titanate are included. Among these compounds, titanium oxide is particularly preferred, and among them, the crystalline form is anatase. Titanium oxide, a mold, has a particularly remarkable effect.
【００１４】なお、光触媒型親水性付与剤の添加量は、
処理剤固形分100重量部中、2〜20重量部が好ましい。こ
の範囲を下回ると錆安定化性能におとり、この範囲を越
えると、塗膜としての強度、耐候性が低下するので好ま
しくない。添加量のより好ましい範囲は、5〜10重量部
である。The amount of the photocatalytic hydrophilicity-imparting agent is as follows:
The content is preferably 2 to 20 parts by weight based on 100 parts by weight of the solid content of the treating agent. If it is below this range, the rust stabilizing performance is poor. If it exceeds this range, the strength and weather resistance of the coating film are undesirably reduced. A more preferable range of the addition amount is 5 to 10 parts by weight.
【００１５】これらの光触媒型親水性付与剤を錆安定化
処理塗膜中に含有させることにより、特に飛来塩分や凍
結防止剤散布が問題となる環境に錆安定化処理を適用し
た場合の、錆安定化性能が著しく優れることが、本発明
者らの検討により明らかとなった。この理由としては、
おそらく活性酸素の作用により塗膜表面の親水性が高ま
ることで、塗膜表面に付着した塩化物イオンなど錆の安
定化に悪影響を与える成分を効率的に洗浄すると共に、
光による錆安定化塗膜の風化・消失が促進され、良好な
外観を保持したまま早期に塗膜から塗膜下に生成した安
定錆に置き換わることが可能となったことが原因と推測
される。 (錆安定化処理剤)本発明における錆安定化処理剤とは、
主に耐候性鋼表面に塗布されて塗膜を形成し、耐候性鋼
の初期流れ錆を抑制しながら塗膜下で耐候性鋼の安定錆
を形成する機能を有するもので、最終的には塗膜は風
化、消失し耐候性鋼の安定錆に置き換わる。By including these photocatalytic hydrophilicity-imparting agents in the rust-stabilizing coating film, the rust-stabilizing treatment applied to an environment in which flying salt and spraying of an antifreezing agent are particularly problematic is reduced. The study by the present inventors revealed that the stabilization performance was remarkably excellent. This is because
Presumably, the active oxygen enhances the hydrophilicity of the coating surface, and effectively cleans the components that adversely affect the stabilization of rust, such as chloride ions attached to the coating surface,
It is speculated that the weathering and disappearance of the rust-stabilized coating film by light was promoted, and it was possible to quickly replace the stable rust generated under the coating film from the coating film while maintaining a good appearance. . (Rust stabilizing agent) Rust stabilizing agent in the present invention,
It is mainly applied to the weathering steel surface to form a coating film, and has the function of forming stable rust of the weathering steel under the coating film while suppressing the initial flow rust of the weathering steel, and ultimately The coating weathers and disappears, replacing the stable rust of the weathering steel.
【００１６】本発明の錆安定化処理剤は、前記の光触媒
型親水性付与剤以外に、樹脂（基体樹脂）、顔料、溶
剤、各種添加剤などからなる。The rust stabilizing agent of the present invention comprises a resin (base resin), a pigment, a solvent, various additives, etc., in addition to the photocatalytic hydrophilicity imparting agent.
【００１７】前記樹脂としては、他の成分を分散し、処
理剤の硬化皮膜を形成し、かつ、処理剤としての塗装作
業性を損なわないものであれば特に制限はなく、エポキ
シ樹脂、フェノール樹脂、ポリエステル樹脂、アクリル
樹脂、ポリウレタン樹脂、フッ素樹脂、ブチラール樹
脂、ビニル系樹脂、アルキッド樹脂などの一般の塗料用
樹脂をベースに、必要に応じて、脂肪酸、油脂、歴青
質、他の化合物などで変性したものを用いることが出来
る。The resin is not particularly limited as long as it disperses other components, forms a cured film of the treatment agent, and does not impair coating workability as the treatment agent. Based on general paint resins such as polyester resin, acrylic resin, polyurethane resin, fluorine resin, butyral resin, vinyl resin, alkyd resin, etc., if necessary, fatty acids, oils and fats, bitumen, other compounds, etc. Can be used.
【００１８】尚、樹脂中には、塗膜にカチオン選択透過
性を付与し、塗膜中への塩分などの腐食性アニオンの透
過を抑制する観点から、カルボキシル基、スルホン基、
リン酸基、フェノール性水酸基などのアニオン性の固定
電荷を付与することが好ましい。In the resin, a carboxyl group, a sulfone group, a carboxyl group, a sulfone group, etc. are added from the viewpoint of imparting cation selective permeability to the coating film and suppressing permeation of corrosive anions such as salts into the coating film.
It is preferable to impart an anionic fixed charge such as a phosphate group or a phenolic hydroxyl group.
【００１９】前記樹脂の含有量は、塗膜強度と塗膜の劣
化過程の外観保持機能のバランスの観点から、処理剤固
形分100重量部に対し、20〜50重量部が好ましい。The content of the resin is preferably 20 to 50 parts by weight based on 100 parts by weight of the solid content of the treating agent, from the viewpoint of the balance between the strength of the coating film and the function of maintaining the appearance during the deterioration of the coating film.
【００２０】顔料としては、体質顔料、着色顔料、その
他の機能性顔料などを必要に応じて適宜選択して配合す
ることができる。体質顔料、着色顔料の例としては、バ
ライト、沈降性硫酸バリウム、白亜、沈降性炭酸カルシ
ウム、胡粉、クレー、砥の粉、タルク、ケイソウ土、シ
リカ白、アルミナ白、石膏、サチン白、グロスホワイ
ト、ベントナイト、ケイ酸カルシウム、沈降性炭酸マグ
ネシウム、ケイ酸アルミニウム、鉛酸カルシウム、酸化
チタン、亜鉛華、リトボン、硫化亜鉛、鉛白、酸化ジル
コン、アンチモン白、酸化スズ、カーボンブラック、油
煙、黒鉛、鉄黒、亜鉛末、亜酸化鉛、炭化ケイ素、ベン
ガラ、鉛丹、朱、カドミウム赤、カドミウム水銀赤、モ
リブデン赤、亜酸化銅、アンバー、黄鉛、ジンククロメ
ート、カドミウム黄、合成オーカ、チタン黄、アンチモ
ン黄、バリウム黄、ストロンチウム黄、クロム緑、酸化
クロム緑、ビリジアン、亜鉛緑、コバルト緑、エメラル
ド緑、マンガン緑、紺青、群青、コバルト青、セルリア
ン青、マンガン青、マンガン紫、濃口コバルト紫、淡口
コバルト紫、マルス紫、アルミ粉等が上げられる。これ
らを単独または複数用いて錆安定化処理剤中に配合する
が、特に鋼材の錆に置換する際の外観上のムラをなくす
ためには、錆と類似の色調となるよう配合するのが好ま
しい。As the pigment, extenders, coloring pigments, other functional pigments and the like can be appropriately selected and blended as required. Examples of extenders and coloring pigments include barite, precipitated barium sulfate, chalk, precipitated calcium carbonate, chalk, clay, abrasive powder, talc, diatomaceous earth, silica white, alumina white, gypsum, satin white, gloss white, bentonite , Calcium silicate, precipitated magnesium carbonate, aluminum silicate, calcium plumbate, titanium oxide, zinc white, lithobon, zinc sulfide, lead white, zircon oxide, antimony white, tin oxide, carbon black, oil smoke, graphite, iron black , Zinc powder, lead oxide, silicon carbide, red iron oxide, lead red, red, cadmium red, cadmium mercury red, molybdenum red, cuprous oxide, amber, graphite, zinc chromate, cadmium yellow, synthetic orca, titanium yellow, antimony Yellow, barium yellow, strontium yellow, chrome green, chromium oxide green, viridian, zinc green, koba Door green, emerald green, manganese green, Prussian blue, ultramarine blue, cobalt blue, cerulean blue, manganese blue, manganese violet, dark soy cobalt violet, pale mouth cobalt violet, Mars violet, aluminum powder, and the like. These are used alone or in combination in the rust stabilizing agent, but it is preferable to mix them so as to have a color tone similar to that of rust, particularly in order to eliminate unevenness in appearance when replacing with rust of steel material. .
【００２１】また、上記顔料以外に、鋼材の腐食速度を
コントロールして、かつ流れ錆、浮き錆など防止する目
的で機能性顔料を配合することが出来る。その例として
は、リン酸塩、モリブデン酸塩、クロム酸塩、タングス
テン酸塩、バナジン酸塩、ベリリウム酸イオン、ケイ酸
イオン、チタン酸イオン、マンガン酸イオン、セレニウ
ム酸イオン、ジルコニウム酸イオンなどが挙げられ、カ
チオン種としては亜鉛、カルシウム、マグネシウム、ア
ルミニウム、バリウム、カリウム、ナトリウム、ストロ
ンチウムなどが上げられる。In addition to the above pigments, functional pigments can be added for the purpose of controlling the corrosion rate of the steel material and preventing flow rust, floating rust and the like. Examples include phosphate, molybdate, chromate, tungstate, vanadate, beryllate, silicate, titanate, manganate, selenate, zirconate, etc. Examples of the cationic species include zinc, calcium, magnesium, aluminum, barium, potassium, sodium, and strontium.
【００２２】なお、上記の顔料は、合計で処理剤固形分
100重量部に対し、30〜70重量部を配合することが好ま
しい。この範囲とすることで、安定錆形成に必要な塗膜
下への水、酸素の供給を促進すると共に、ブリスターな
どの見苦しい塗膜外観劣化を防止することが出来る。The above-mentioned pigments are used in total
It is preferable to add 30 to 70 parts by weight to 100 parts by weight. When the content is within this range, the supply of water and oxygen below the coating film required for stable rust formation can be promoted, and unsightly deterioration of the coating film such as blisters can be prevented.
【００２３】本発明の処理剤には、上記以外に、硬化促
進剤、増粘剤、その他の無機塩、溶剤、その他の処理剤
添加物等を含有することが出来る。 （錆安定化処理鋼材）本発明の錆安定化処理鋼材は、前
記の錆安定化処理剤の硬化皮膜が鋼材表面に形成された
ものであり、硬化皮膜の膜厚は10〜100μmの範囲が好ま
しい。この範囲を下回ると本発明処理剤の性能が全般的
に劣り、またこの範囲を越えても効果は一定で高コスト
になるため好ましくない。また錆安定化処理剤は、鋼材
表面のスケールをサンドブラスト、ショットブラスト等
で除去した後に塗布するのが好ましい。更に本発明の錆
安定化処理剤の鋼材表面への形成方法は、通常の塗料と
同様、エアスプレー、エアレススプレー、刷毛塗り等の
方法が適用できる。The treating agent of the present invention may contain, in addition to the above, a curing accelerator, a thickening agent, other inorganic salts, a solvent, and other treating agent additives. (Rust-stabilized steel) The rust-stabilized steel of the present invention is obtained by forming a hardened film of the above-mentioned rust-stabilizing agent on a steel material surface, and the hardened film has a thickness of 10 to 100 μm. preferable. Below this range, the performance of the treating agent of the present invention is generally inferior, and beyond this range, the effect is constant and high cost is not preferred. The rust stabilizing agent is preferably applied after removing the scale on the surface of the steel material by sand blasting, shot blasting or the like. Further, as a method for forming the rust stabilizing agent of the present invention on a steel material surface, a method such as air spraying, airless spraying, or brushing can be applied as in the case of ordinary paints.
【００２４】[0024]
【実施例】以下、本発明の実施例を説明する。JIS G 31
14に規定された耐候性鋼材(SMA 400)試験片（150mm×70
mm×6mm）をブラスト処理した後に表1に示した成分系の
処理剤を膜厚45μmで塗布した。着色顔料としては、ベ
ンガラと鉄黒を1：3の重量比率で混合した。ベースの樹
脂としては、常乾型の脂肪酸変性エポキシ樹脂を用い
た。尚、表1に記載した以外の成分として、硬化促進
剤、その他処理剤としての物性を調整するための添加剤
として、増粘剤、レベリング剤を適宜添加した。尚表1
中の重量部は硬化塗膜中の重量部である。Embodiments of the present invention will be described below. JIS G 31
Specimen for weathering steel (SMA 400) specified in 14 (150mm × 70
(mm × 6 mm), and then a component-based treating agent shown in Table 1 was applied at a film thickness of 45 μm. As the color pigment, red iron oxide and iron black were mixed at a weight ratio of 1: 3. As the base resin, an air-dry fatty acid-modified epoxy resin was used. In addition, as components other than those described in Table 1, a curing accelerator and other thickeners and leveling agents were added as additives for adjusting the physical properties of the treating agent. Table 1
The parts by weight therein are parts by weight in the cured coating film.
【００２５】表1に記載した処理剤を塗布した耐候性鋼
材を下記の方法で評価し、耐候性鋼の錆安定化処理剤と
しての性能を評価した。 (1)田園地帯暴露(3年、南面30°暴露)による流れ錆有
無、および安定錆形成の有無。 (2)海岸地帯暴露(3年、南面30°暴露)による流れ錆有
無、および安定錆形成の有無。 (3)融雪塩散布地域(3年)、融雪塩散布地域に設置された
橋梁の下フランジ部に試験片を取り付け、流れ錆有無、
及び安定錆形成の有無 流れ錆有無：塗膜表面の外観で評価した。 ◎：全く見られない、○：殆ど見られない、 △：多少見られる、×：顕著に見られる 安定錆形成：塗膜を剥がし、塗膜下の錆の状況を調べ、
以下の評価をした。 ◎：緻密で欠陥の少ない錆が連続的に形成されている ○：緻密な錆が連続的に形成されているが、僅かに欠陥
がある △：錆が形成されているものの、緻密さに欠け、欠陥も
多い ×：層状の剥がれやすい錆が形成されている 評価結果を表1に併せて示す。The weathering steel coated with the treating agent shown in Table 1 was evaluated by the following method, and the performance of the weathering steel as a rust stabilizing agent was evaluated. (1) Existence of flowing rust due to exposure to countryside (3 years, exposure to 30 ° on the south side), and presence or absence of stable rust formation. (2) Existence of flowing rust due to coastal zone exposure (3 years, 30 ° south side exposure) and presence or absence of stable rust formation. (3) Attaching the test piece to the lower flange of the bridge installed in the snow melting salt spray area (3 years), the snow melting salt spray area,
And the presence or absence of formation of stable rust. The presence or absence of flowing rust: evaluated by the appearance of the coating film surface. ：: Not seen at all, ○: Almost not seen, Δ: Somewhat seen, ×: Notably seen Stable rust formation: Peeling off the coating, examining the state of rust under the coating,
The following evaluations were made. ◎: Dense rust with few defects is continuously formed. ：: Dense rust is continuously formed, but slightly defective. ：: Rust is formed but lacks in density. And many defects. ×: Layered easily peelable rust is formed. The evaluation results are also shown in Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】表１から以下のことが分かる。本発明の錆
安定化処理を適用された発明例の鋼材は、田園環境、海
岸環境、融雪塩散布地域いずれにおいても良好な外観保
持機能と安定錆形成機能を有し、高塩分環境においても
良好な性能を保持することが分かった。The following can be seen from Table 1. The steel material of the invention example to which the rust stabilization treatment of the present invention is applied has a good appearance maintaining function and a stable rust forming function in any of rural environments, coastal environments, and snow-melting salt spray areas, and is also excellent in high salt environments. It was found that the performance was maintained.
【００２８】光触媒型親水性付与剤の含有量が２〜２０
重量部の場合より優れた性能が得られ、特に光触媒型親
水性付与剤として酸化チタンを使用することで一層優れ
た性能が得られることが分かった。The content of the photocatalytic hydrophilicity-imparting agent is from 2 to 20.
It was found that superior performance was obtained in the case of parts by weight, and in particular, more excellent performance was obtained by using titanium oxide as the photocatalytic hydrophilicity imparting agent.
【００２９】また、顔料の配合量を30〜70重量部とする
ことで、一層優れた性能が得られることが分かった。Further, it has been found that by setting the blending amount of the pigment to 30 to 70 parts by weight, more excellent performance can be obtained.
【００３０】なお、融雪塩散布地域においては、定期的
に塗膜表面の付着塩分量を測定したが、本発明の錆安定
化処理は表面の付着量が比較例と比較し著しく小さかっ
たことから、表面の親水化付与効果により付着塩分が洗
浄され、その結果塗膜への塩分浸透が抑制され、結果的
に塗膜下の安定錆形成がスムーズに行えたと共に、塩分
による過度な腐食による流れ錆の発生も抑制されたもの
と考えられる。In the area where the snow melting salt was sprayed, the amount of salt attached to the surface of the coating film was measured periodically. However, the rust stabilizing treatment of the present invention showed that the amount of salt attached to the surface was significantly smaller than that of the comparative example. In addition, the adhered salt is washed out by the effect of imparting hydrophilicity to the surface, and as a result, the penetration of salt into the coating film is suppressed. As a result, stable rust formation under the coating film can be performed smoothly, and the flow due to excessive corrosion due to salt content. It is considered that the generation of rust was also suppressed.
【００３１】[0031]
【発明の効果】以上述べたように、本発明の錆安定化処
理剤の硬化皮膜を形成した鋼材は、田園環境、海洋環
境、融雪塩散布環境いずれにおいても流れ錆防止性能と
効率的な安定錆形成性能を兼ね備えていた。As described above, the steel material formed with the cured film of the rust stabilizing agent of the present invention has a flow rust prevention performance and an efficient and stable performance in any of rural environments, marine environments, and snowmelt salt spray environments. It had rust forming performance.
【００３２】特に光触媒型親水性付与剤として酸化チタ
ンを使用することで更に良好な性能が得られることが分
かった。In particular, it has been found that better performance can be obtained by using titanium oxide as a photocatalytic hydrophilicity imparting agent.
【００３３】本発明の錆安定化処理剤を耐候性鋼材に適
用することで、良好な外観を保持しつつ、鋼材のメンテ
ナンスフリー化が図れ、従来の塗装の塗り替え等の費用
が不要となり、その経済効果は計り知れない。By applying the rust stabilizing agent of the present invention to a weather-resistant steel material, maintenance of the steel material can be achieved while maintaining a good appearance, and the cost of repainting the conventional coating is unnecessary, and the cost is reduced. The economic effect is immense.
───────────────────────────────────────────────────── 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） Ｃ２３Ｆ 11/00 Ｃ２３Ｆ 11/00 Ｚ // Ｃ０９Ｋ 3/18 Ｃ０９Ｋ 3/18 (72)発明者 古田 彰彦 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4H020 AA01 AB02 4J038 CD091 CE071 CG001 DA051 DB001 DD001 DD121 DD231 DG001 HA216 KA04 KA07 NA01 NA03 NA06 PC02 4K026 AA02 BA04 BB08 DA02 4K062 AA01 BC12 CA04 DA10 FA01 FA08 FA12 GA01 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C23F 11/00 C23F 11/00 Z // C09K 3/18 C09K 3/18 (72) Inventor Akihiko Furuta Tokyo 1-1-2, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. F-term (reference) 4H020 AA01 AB02 4J038 CD091 CE071 CG001 DA051 DB001 DD001 DD121 DD231 DG001 HA216 KA04 KA07 NA01 NA03 NA06 PC02 4K026 AA02 BA04 BB08 DA02 4K06 DA10 FA01 FA08 FA12 GA01
Claims (4)
することを特徴とする鋼材の錆安定化処理剤。Claims: 1. A rust stabilizing agent for steel, comprising a photocatalytic hydrophilicity imparting agent in the agent.
であることを特徴とする請求項1に記載の錆安定化処理
剤。2. The rust stabilizing agent according to claim 1, wherein the photocatalytic hydrophilicity imparting agent is titanium oxide.
分100重量部中に2〜20重量部含有されていることを特徴
とする請求項１または2に記載の錆安定化処理剤。3. The rust stabilizing agent according to claim 1, wherein the photocatalytic hydrophilicity-imparting agent is contained in an amount of 2 to 20 parts by weight based on 100 parts by weight of the solid content of the processing agent.
剤の乾燥皮膜を表面に形成してなる錆安定化処理鋼材。4. A rust-stabilized steel material having a dried film of the treatment agent according to claim 1 formed on a surface thereof.
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|---|---|---|---|
| JP2000360739A JP3644377B2 (en) | 2000-11-28 | 2000-11-28 | Rust stabilization treatment agent for steel and rust stabilization treatment steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000360739A JP3644377B2 (en) | 2000-11-28 | 2000-11-28 | Rust stabilization treatment agent for steel and rust stabilization treatment steel |
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| JP3644377B2 JP3644377B2 (en) | 2005-04-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181316A (en) * | 2002-12-02 | 2004-07-02 | Nippon Paint Co Ltd | Multi-ply coating film having secularly changed design, its formation method, method for determining composition of multi-ply coating film, and method for predicting secular change of coating film |
| CN112226101A (en) * | 2020-10-15 | 2021-01-15 | 吉林省陆柒肆伍贰科技有限公司 | Preparation method of tannin grafted glass flakes and application of tannin grafted glass flakes in high-solid anticorrosive paint |
-
2000
- 2000-11-28 JP JP2000360739A patent/JP3644377B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181316A (en) * | 2002-12-02 | 2004-07-02 | Nippon Paint Co Ltd | Multi-ply coating film having secularly changed design, its formation method, method for determining composition of multi-ply coating film, and method for predicting secular change of coating film |
| CN112226101A (en) * | 2020-10-15 | 2021-01-15 | 吉林省陆柒肆伍贰科技有限公司 | Preparation method of tannin grafted glass flakes and application of tannin grafted glass flakes in high-solid anticorrosive paint |
| CN112226101B (en) * | 2020-10-15 | 2021-04-23 | 吉林省陆柒肆伍贰科技有限公司 | Preparation method of tannin grafted glass flakes and application of tannin grafted glass flakes in high-solid anticorrosive paint |
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|---|---|
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