JPH0718467A - Coating agent for preventing corrosion of metallic plate and surface-treated metallic plate - Google Patents
Coating agent for preventing corrosion of metallic plate and surface-treated metallic plateInfo
- Publication number
- JPH0718467A JPH0718467A JP18707793A JP18707793A JPH0718467A JP H0718467 A JPH0718467 A JP H0718467A JP 18707793 A JP18707793 A JP 18707793A JP 18707793 A JP18707793 A JP 18707793A JP H0718467 A JPH0718467 A JP H0718467A
- Authority
- JP
- Japan
- Prior art keywords
- metallic plate
- metal
- coating agent
- metal plate
- 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.)
- Granted
Links
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、環境、人体に悪影響を
与えず、しかも、クロメ−ト処理剤と同等の防食性能を
有するノンクロム型の金属板用コ−ティング剤、詳しく
は、アントシアン錯化合物のイオン化傾向を利用して金
属板を防食する金属板のコ−ティング剤およびそのコ−
ティング剤をコ−ティングした表面処理金属板に関す
る。BACKGROUND OF THE INVENTION The present invention relates to a non-chrome type coating agent for metal plates, which has no adverse effect on the environment and human body and has an anticorrosive performance equivalent to that of a chromate treating agent, more specifically, an anthocyan complex. Coating agent for metal plate which protects metal plate by utilizing ionization tendency of compound and its coating
The present invention relates to a surface-treated metal plate coated with a coating agent.
【０００２】[0002]
【従来技術】従来、鋼板の防食処理には、防錆油やクロ
メ−ト処理剤が使用されているが、防錆油は高価で脱脂
などの取り扱いも不便なため、特別な場合を除いてあま
り使用されない。このため、多くの場合、クロメ−ト処
理剤を使用しているが、クロメ−ト処理剤は有害な６価
クロムを含有しているため、廃液が土壌に浸透したり、
海に流れたりすると、環境を汚染するという問題があ
る。また、６価クロムを含有するものはクロメ−ト処理
製品に限らず、防錆顔料なども６価クロムが溶出して人
体に悪影響を与えるのではないかとの懸念が大きいた
め、最近は安全衛生上嫌われる傾向にある。2. Description of the Related Art Conventionally, rust preventive oils and chromate treating agents have been used for anticorrosion treatment of steel sheets, but rust preventive oils are expensive and inconvenient to handle such as degreasing. Not used much. Therefore, in most cases, a chromate treatment agent is used, but since the chromate treatment agent contains harmful hexavalent chromium, the waste liquid permeates the soil,
When it flows into the sea, it poses a problem of polluting the environment. Also, those containing hexavalent chromium are not limited to chromate-treated products, and there is a great concern that hexavalent chromium may elute and adversely affect the human body, such as anticorrosion pigments. It tends to be disliked above.
【０００３】このため、近年種々のノンクロム型防錆処
理剤が提案されている。この処理剤としては、ジルコニ
ウム系、シリケ−ト系、薄膜の樹脂系などがあるが、い
ずれもクロメ−ト処理剤に比べると防錆性が劣るのが実
情である。For this reason, various non-chrome type anticorrosive agents have recently been proposed. Examples of this treating agent include zirconium type, silicate type, thin film resin type, etc., but in reality, they are inferior in rust preventive property as compared with the chromate treating agent.
【０００４】金属板が亜鉛系めっき鋼板やアルミニウム
系めっき鋼板の場合、切り口端面に鉄地が露出している
ため、めっき鋼板の板厚やめっき付着量、環境などによ
っては、金属板の犠牲防食作用が及ばず、錆が発生し易
いが、いずれの防錆処理剤もこの端面防食には効果がな
い。とくに、アルミニウム系めっき鋼板の場合はアルミ
ニウムの端面防食作用が小さいため、犠牲防食作用を有
する防錆処理剤が要望されていた。When the metal plate is a zinc-based plated steel plate or an aluminum-based plated steel plate, the iron material is exposed at the end face of the cut, so depending on the plate thickness of the plated steel plate, the amount of the applied coating, the environment, etc., sacrificial corrosion prevention of the metal plate It does not work, and rust is likely to occur, but any anticorrosive agent is not effective for this end face corrosion protection. In particular, in the case of an aluminum-based plated steel sheet, since the end face anticorrosive action of aluminum is small, a rust preventive treatment agent having a sacrificial anticorrosive action has been demanded.
【０００５】[0005]
【発明が解決しようとする課題】そこで、本発明は、ク
ロメ−ト処理剤に匹敵する防食作用を有し、しかも、端
面防食作用も備えたノンクロム型防錆処理剤およびその
表面処理金属板を提供するものである。Therefore, the present invention provides a non-chrome type anticorrosive agent and a surface-treated metal plate thereof which have an anticorrosive action comparable to that of a chromate treating agent and also have an end face anticorrosive action. It is provided.
【０００６】[0006]
【課題を解決するための手段】本発明のノンクロム型防
錆処理剤は、アントシアンの金属錯化合物で、その配位
金属が被防食金属板よりイオン化傾向の大きい金属のも
のを溶媒に溶解してなる金属板の防食用コ−ティング剤
であり、表面処理金属板はそのコ−ティング剤を金属板
にコ−ティングして、溶媒を蒸発させてなるものであ
る。The non-chrome type anticorrosive agent of the present invention is a metal complex compound of anthocyan having a coordination metal whose ionization tendency is larger than that of the metal plate to be protected by dissolving in a solvent. The surface-treated metal plate is obtained by coating the metal plate with the coating agent and evaporating the solvent.
【０００７】[0007]
【作用】アントシアンは、天然色素として植物の花や果
実に含まれており、人体に無害であるので、食品の着色
などに従来より多く使用されている。このアントシアン
は、遊離状態では不安定であるが、錯化合物は安定して
いる。そこで、本発明ではアントシアン錯化合物とし
て、被防食金属板よりイオン化傾向の大きい金属の錯化
合物を用い、これを溶媒に溶解して、金属板にコ−ティ
ングするようにしたのである。[Function] Since anthocyan is contained as a natural pigment in flowers and fruits of plants and is harmless to the human body, it has been widely used for coloring foods. This anthocyan is unstable in the free state, but the complex compound is stable. Therefore, in the present invention, a complex compound of a metal having an ionization tendency higher than that of the metal plate to be protected is used as the anthocyan complex compound, which is dissolved in a solvent and coated on the metal plate.
【０００８】金属板にコ−ティングした場合、溶媒を蒸
発すれば、乾燥皮膜になるが、錯化合物の配位金属は被
防食金属板よりイオン化傾向が大きいので、水分が存在
すると、金属板より溶出した金属イオンと置換され、金
属板よりの溶出金属イオンはアントシアンにより捕捉さ
れる。このため、金属板よりの溶出金属イオンは捕捉さ
れて、錆になることはない。溶出金属イオンを捕捉した
アントシアンは金属板に固着して安定して存在するた
め、金属板が雰囲気と接触するのを遮断する。また、金
属板よりの溶出金属イオンと置換した配位金属イオンは
金属板より電位が卑であるので、金属板を腐食させるよ
うなことはない。When coated on a metal plate, when the solvent evaporates, a dry film is formed. However, since the coordinated metal of the complex compound has a greater ionization tendency than the corrosion-prevented metal plate, the presence of moisture causes the metal film to form a dry film. The eluted metal ions are replaced, and the eluted metal ions from the metal plate are captured by anthocyan. Therefore, the metal ions eluted from the metal plate are not trapped and do not become rust. Since the anthocyan that has captured the eluted metal ions is stably attached to the metal plate and is present stably, it blocks contact of the metal plate with the atmosphere. Further, since the coordinated metal ion substituted with the metal ion eluted from the metal plate has a lower potential than the metal plate, it does not corrode the metal plate.
【０００９】アントシアンには、ペラルゴニジン系、シ
アニジン系、デルフィニジン系などがあるが、これらは
いずれも金属と錯化合物を形成するので、金属錯化合物
として使用可能である。また、アグリコンであるアント
シアニジンの金属錯化合物も使用可能である。[0009] Anthocyans include pelargonidin-based, cyanidin-based, delphinidin-based, etc., all of which form a complex compound with a metal, and thus can be used as a metal complex compound. Further, a metal complex compound of anthocyanidin which is an aglycone can also be used.
【００１０】アントシアン金属錯化合物の配位金属とし
ては、金属板よりイオン化傾向の大きいものにするので
あるが、金属板が冷延鋼板、アルミニウム板のように単
独金属のものであるならば、それらよりイオン化傾向の
大きいものにすればよい。しかし、金属板が亜鉛めっき
鋼板やアルミニウムめっき鋼板のように複数の金属から
構成されている場合にはその中で最も電位の卑な金属よ
りイオン化傾向の大きいものにする。例えば、亜鉛めっ
き鋼板の場合は亜鉛よりイオン化傾向の大きいカルシウ
ム、ナトリウム、マグネシウムのようなアルカリ金属、
アルカリ土類金属にする。The coordination metal of the anthocyan metal complex compound is one having a greater ionization tendency than the metal plate, but if the metal plate is a single metal such as a cold rolled steel plate or an aluminum plate, those What has a larger ionization tendency may be used. However, in the case where the metal plate is composed of a plurality of metals such as a galvanized steel plate or an aluminum plated steel plate, the metal plate having a higher ionization tendency than the base metal having the lowest potential among them is selected. For example, in the case of galvanized steel, alkali metals such as calcium, sodium and magnesium, which have a greater ionization tendency than zinc,
Use alkaline earth metal.
【００１１】アントシアンの金属錯化合物を溶解する溶
媒としては、アントシアン金属錯化合物が溶解するもの
であればよく、安価なものとしては水、アルコ−ルなど
が挙げられる。溶液中にはコ−ティング性をよくするた
め、あるいはアントシアンの徐放性をコントロ−ルする
ため、樹脂を添加してもよい。ｐＨは中性にするのが好
ましい。The solvent for dissolving the metal complex compound of anthocyan may be any solvent capable of dissolving the metal complex compound of anthocyan, and examples of inexpensive solvents include water and alcohol. A resin may be added to the solution for improving the coating property or controlling the sustained release property of anthocyan. The pH is preferably neutral.
【００１２】アントシアン金属錯化合物溶液の金属板へ
のコ−ティングは、公知方法、例えば、スプレ−法、刷
毛塗り法、ロ−ルコ−ト法、静電霧化法などによればよ
い。金属板としては、普通鋼鋼板、ステンレス鋼板、各
種めっき鋼板などのような鋼板類、アルミニウム板、銅
板、亜鉛板のような非鉄金属板でもよい。The coating of the anthocyan metal complex compound solution on the metal plate may be carried out by a known method, for example, a spray method, a brush coating method, a roll coat method, an electrostatic atomization method or the like. The metal plate may be a steel plate such as a plain steel plate, a stainless steel plate, various plated steel plates and the like, or a non-ferrous metal plate such as an aluminum plate, a copper plate and a zinc plate.
【００１３】[0013]
【実施例】３,５,７−トリヒドロキシフラビニウムの３
位糖置換体のナトリウム錯化合物の１０％水溶液に０.
８ｍｍの溶融アルミニウムめっき鋼板を浸漬して、ロ−
ルで絞り、アントシアニン金属錯化合物付着量１０.ｍ
ｇ/ｍ2の試料を作成した。次に、この鋼板に２Ｔ折り曲
げ加工を施して、温度５０℃、相対湿度９８％の湿潤雰
囲気中に１００時間放置する湿潤試験を実施した。な
お、湿潤試験の際には比較材として、同様に折り曲げ加
工を施したクロメ−ト処理溶融アルミニウムめっき鋼板
（板厚０.８ｍｍ、クロム付着量２０ｍｇ/ｍ2）を使用
した。この結果を表１に示す。EXAMPLE 3 3,5,7-trihydroxyflavinium
0.1% to a 10% aqueous solution of sodium complex compound of substituted sugar.
Dip an 8 mm hot dip aluminum plated steel sheet and roll
Squeeze with an anthocyanin metal complex compound amount of 10.m
A sample of g / m 2 was prepared. Next, a 2T bending process was applied to this steel sheet, and a wet test was carried out in which the steel plate was left in a wet atmosphere at a temperature of 50 ° C. and a relative humidity of 98% for 100 hours. In the wet test, a chromium-treated hot-dip aluminum plated steel sheet (sheet thickness 0.8 mm, chromium adhesion amount 20 mg / m 2 ) similarly bent was used as a comparative material. The results are shown in Table 1.
【００１４】[0014]
【表１】 評価基準 ○： 発錆なし △： ２０〜２５％発錆 ×： ５０〜８０％発錆[Table 1] Evaluation criteria ○: No rusting △: 20-25% rusting ×: 50-80% rusting
【００１５】[0015]
【発明の効果】以上のように、本発明は、天然色素を金
属板の防食コ−ティング剤に使用するのであるから、環
境、人体に悪影響を与えることがない。また、防食性は
クロメ−ト処理とほぼ同等であるので、従来のノンクロ
ム型防錆処理剤より優れている。とくにめっき鋼板の切
り口端面に適用した場合、クロメ−ト処理剤より優れた
防食性を発揮する。As described above, according to the present invention, since the natural pigment is used as the anticorrosion coating agent for the metal plate, the environment and the human body are not adversely affected. Further, since the anticorrosive property is almost the same as that of the chromate treatment, it is superior to the conventional non-chrome type anticorrosive treatment agent. In particular, when it is applied to the cut end surface of a plated steel sheet, it exhibits better corrosion resistance than the chromate treatment agent.
Claims (2)
配位金属が被防食金属板よりイオン化傾向の大きい金属
のものを溶媒に溶解してなる金属板の防食用コ−ティン
グ剤。1. A coating agent for anticorrosion of a metal plate, which comprises a metal complex compound of anthocyan whose coordination metal has a greater ionization tendency than that of the metal plate to be protected, dissolved in a solvent.
属板にコ−ティングして、溶媒を蒸発させてなる表面処
理金属板。2. A surface-treated metal plate obtained by coating the metal plate with the anticorrosion coating agent according to claim 1 to evaporate the solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18707793A JP3247502B2 (en) | 1993-06-30 | 1993-06-30 | Coating agent for anticorrosion of metal plate and surface treated metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18707793A JP3247502B2 (en) | 1993-06-30 | 1993-06-30 | Coating agent for anticorrosion of metal plate and surface treated metal plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0718467A true JPH0718467A (en) | 1995-01-20 |
| JP3247502B2 JP3247502B2 (en) | 2002-01-15 |
Family
ID=16199736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18707793A Expired - Fee Related JP3247502B2 (en) | 1993-06-30 | 1993-06-30 | Coating agent for anticorrosion of metal plate and surface treated metal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3247502B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535615B2 (en) | 2005-07-28 | 2013-09-17 | Saga University | Radical sterilization apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9592171B2 (en) | 2011-08-25 | 2017-03-14 | Undersea Breathing Systems, Inc. | Hyperbaric chamber system and related methods |
-
1993
- 1993-06-30 JP JP18707793A patent/JP3247502B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535615B2 (en) | 2005-07-28 | 2013-09-17 | Saga University | Radical sterilization apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3247502B2 (en) | 2002-01-15 |
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|---|---|---|---|
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