JPS5835269B2 - Steel corrosion inhibitor - Google Patents
Steel corrosion inhibitorInfo
- Publication number
- JPS5835269B2 JPS5835269B2 JP10065976A JP10065976A JPS5835269B2 JP S5835269 B2 JPS5835269 B2 JP S5835269B2 JP 10065976 A JP10065976 A JP 10065976A JP 10065976 A JP10065976 A JP 10065976A JP S5835269 B2 JPS5835269 B2 JP S5835269B2
- Authority
- JP
- Japan
- Prior art keywords
- corrosion inhibitor
- steel corrosion
- corrosion
- steel
- present
- 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.)
- Expired
Links
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は鉄鋼の防蝕剤に関するものであり、特に従来の
この種防蝕剤と同等或いはそれ以上の効果を有し、しか
も環境汚染を起さない無公害性の安価な防蝕剤を提供せ
んとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a corrosion inhibitor for steel, and in particular to a non-polluting, inexpensive corrosion inhibitor that is equivalent to or more effective than conventional corrosion inhibitors of this type and does not cause environmental pollution. The purpose is to provide a corrosion inhibitor.
従来、特に開放循環式冷却水系の防蝕ｌこは、重合燐酸
塩、クロム酸塩が主として使用されている。Conventionally, polymerized phosphates and chromates have been mainly used as corrosion preventive materials, especially for open circulation cooling water systems.
しかし、重合燐酸塩は冷却水中で容易に加水分解してオ
ルト燐酸塩となり、その防蝕力を速やかに失い、且つオ
ルト燐酸塩は水中の硬度成分と結合して熱交換器の高熱
部にスケールとなって析出し、熱の伝導を著しく妨げる
欠点を有する。However, polymerized phosphates are easily hydrolyzed into orthophosphates in cooling water and quickly lose their anticorrosive properties, and orthophosphates combine with hardness components in the water and form scales in the high-temperature parts of heat exchangers. It has the disadvantage that it precipitates and significantly impedes heat conduction.
又、排出された燐酸塩は湖沼、河、海に流入して水質の
富栄養化の原因となり赤潮公害の主因となっていること
は衆知の事実である。Furthermore, it is a well-known fact that the discharged phosphates flow into lakes, rivers, and oceans, causing eutrophication of water quality and becoming the main cause of red tide pollution.
クロム酸塩は優れた防蝕力を有することは良く知られて
おり、現在迄特に多用されて来た。It is well known that chromate has excellent anti-corrosion properties, and has been particularly widely used up to now.
しかし、クロム酸塩は強い毒性を有し、クロム酸塩を含
む冷却水を系外に排水しようとする場合、クロム酸塩を
回収せねばならず、回収設備に多大の経費を必要とする
。However, chromate is highly toxic, and if cooling water containing chromate is to be drained from the system, the chromate must be recovered, which requires a large amount of expense for recovery equipment.
そこで本発明者らは、従来の重合燐酸塩、クロム酸塩系
の防蝕剤と同等又はそれ以上の防蝕性能を有し且つ、環
境汚染を起さない無公害性で安価な防蝕剤を提供せんと
、鋭意研究の結果、本発明の防蝕剤を完成するに至った
。Therefore, the inventors of the present invention sought to provide a non-polluting, inexpensive corrosion inhibitor that does not pollute the environment and has corrosion prevention performance equivalent to or superior to conventional polymeric phosphate and chromate-based corrosion inhibitors. As a result of extensive research, we have completed the corrosion inhibitor of the present invention.
すなわち本発明は硼酸塩とアルミン酸塩を併用する防蝕
剤であり、低濃度で防蝕力を有し、硬度成分並びに塩素
イオン、硫酸イオンの妨害イオンの存在下においても効
果の低下が少く悪い水質に於いても使用可能なものであ
る。In other words, the present invention is a corrosion inhibitor that uses a combination of borates and aluminates, which has anticorrosive power at low concentrations, and whose effectiveness does not decrease much even in the presence of hardness components and interfering ions such as chloride and sulfate ions, making it suitable for poor water quality. It can also be used in
又、この防蝕剤を使用した冷却水は毒性、着色性無く、
系外に排出されても、水質汚濁の問題を起す心配はなく
、原料的にも安価に多量且つ容易に入手でき、防錆経費
の節減にも貢献できるものである。In addition, cooling water using this anticorrosion agent is non-toxic and non-coloring.
Even if it is discharged outside the system, there is no risk of water pollution, and it can be easily obtained as a raw material in large quantities at low cost, and can also contribute to reducing rust prevention costs.
本発明の防蝕剤は半密閉式又は開放式循環式冷却水系、
その細氷と接触する鉄鋼に使用できる。The corrosion inhibitor of the present invention can be used in semi-closed or open circulating cooling water systems,
It can be used for steel that comes into contact with the thin ice.
本発明の防蝕剤において使用される硼酸塩としては硼酸
、メタ硼酸のＮａ、に等のアルカリ金属塩、アンモニア
塩、エタノールアミン、アミン塩が使用でき、アルミン
酸塩は、アルミン酸のＮａ、に等のアルカリ金属塩が使
用できる。As the borate used in the corrosion inhibitor of the present invention, alkali metal salts such as boric acid, metaboric acid, Na, ammonia salts, ethanolamine, amine salts, etc. can be used, and aluminates include Na, aluminate, etc. Alkali metal salts such as can be used.
硼酸塩とアルミン酸塩は、１：９〜８：２の重量比で配
合することが好ましく、その配合組成物を水に溶解し、
水溶液を鉄鋼表面に接触させて防錆するものである。Borate and aluminate are preferably blended in a weight ratio of 1:9 to 8:2, and the blended composition is dissolved in water,
It prevents rust by bringing an aqueous solution into contact with the steel surface.
本発明の防蝕剤の作用機構については不明だが硼酸塩と
アルミン酸塩の相乗効果に依り、金属表面に防蝕被膜を
形成して防錆効果を発揮するものと推定される。Although the mechanism of action of the anticorrosion agent of the present invention is unknown, it is presumed that the synergistic effect of the borate and the aluminate forms an anticorrosive film on the metal surface, thereby exerting the antirust effect.
一般的に本発明の防蝕剤は、３０〜５Ｑｐｐｍの濃度に
て鉄鋼に対して効果的に作用し、発錆を防止する。Generally, the corrosion inhibitor of the present invention acts effectively on steel and prevents rusting at a concentration of 30 to 5 Qppm.
又、その腐蝕量を減らす事ができる。Moreover, the amount of corrosion can be reduced.
この効果は硬度成分並びにｃｔ 、ｓｏ、″″−イオ
ンの妨害イオンが共存しても殆んど低下する事はない。This effect hardly decreases even if hardness components and interfering ions such as ct, so, and ""-ions coexist.
Ｃｔ−イオン１８０ｍ、ｓｏ、 −イオン１８０＋十
ｐｐＩ［ｌ、Ｃａ イオン１８０ｐｐＩ１１を含む
腐蝕液中ニ防蝕剤を添加して鉄鋼試験片（ＪＩＳ−Ｇ−
３３１０５０ｍｍＸ ２５ｍｍＸ １ｍｍ）を浸漬して
、３５±２℃にてマグネチツクスクーラーにて液を連続
的（こ８日間攪拌した。A steel test piece (JIS-G-
331050 mm x 25 mm x 1 mm) was immersed in the liquid, and the liquid was stirred continuously (for 8 days) using a magnetic cooler at 35±2°C.
テストピースは試験に入る前に１５０ｐＩＸＩｌの所謂
。The test piece is so-called 150 pIXIl before entering the test.
基礎投入濃度の溶液中に浸漬して２日間連続して攪拌し
た。It was immersed in the solution at the basic concentration and stirred continuously for 2 days.
得られた結果を、下記の表に示す。The results obtained are shown in the table below.
同時に比較例として従来品と無添加につき同一条件で得
た結果について併記した。At the same time, as a comparative example, results obtained under the same conditions as a conventional product and no additives are also listed.
Claims (1)
する鉄鋼防蝕剤。1. A steel corrosion inhibitor characterized by being a combination of aluminate and borate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10065976A JPS5835269B2 (en) | 1976-08-25 | 1976-08-25 | Steel corrosion inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10065976A JPS5835269B2 (en) | 1976-08-25 | 1976-08-25 | Steel corrosion inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5326747A JPS5326747A (en) | 1978-03-13 |
| JPS5835269B2 true JPS5835269B2 (en) | 1983-08-01 |
Family
ID=14279923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10065976A Expired JPS5835269B2 (en) | 1976-08-25 | 1976-08-25 | Steel corrosion inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5835269B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5964422A (en) * | 1982-10-04 | 1984-04-12 | Iwaguro Seisakusho:Kk | Ptp sheet stacking apparatus |
-
1976
- 1976-08-25 JP JP10065976A patent/JPS5835269B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5326747A (en) | 1978-03-13 |
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