JPH06306652A - Corrosion inhibitor for metal and corrosion inhibiting method for metal - Google Patents
Corrosion inhibitor for metal and corrosion inhibiting method for metalInfo
- Publication number
- JPH06306652A JPH06306652A JP10327693A JP10327693A JPH06306652A JP H06306652 A JPH06306652 A JP H06306652A JP 10327693 A JP10327693 A JP 10327693A JP 10327693 A JP10327693 A JP 10327693A JP H06306652 A JPH06306652 A JP H06306652A
- Authority
- JP
- Japan
- Prior art keywords
- molybdate
- acid
- metal
- corrosion
- metal 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は水系における金属腐食抑
制剤および金属腐食抑制方法に関し、さらに詳しくはモ
リブデン酸塩およびオキシカルボン酸化合物を必須成分
として含有することを特徴とする金属腐食抑制剤および
これら両成分を併用添加することを特徴とする金属腐食
抑制方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal corrosion inhibitor and a method for inhibiting metal corrosion in a water system, and more specifically, a metal corrosion inhibitor characterized by containing a molybdate and an oxycarboxylic acid compound as essential components, and The present invention relates to a method for suppressing metal corrosion, which comprises adding both of these components together.
【０００２】[0002]
【従来の技術】密閉循環冷却水系または開放循環冷却水
系の金属材料を防食するために、従来クロム酸塩、りん
酸塩、亜鉛塩、亜硝酸塩、モリブデン酸塩などが金属腐
食抑制剤として使用されている。2. Description of the Related Art Chromates, phosphates, zinc salts, nitrites, molybdates, etc. are conventionally used as metal corrosion inhibitors to prevent corrosion of metal materials in closed circulating cooling water systems or open circulating cooling water systems. ing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
金属腐食抑制剤はその使用に際し種々の間題点を抱えて
いる。However, the above-mentioned metal corrosion inhibitors have various problems in their use.
【０００４】即ち、クロム酸塩は優れた防食効果を有す
るものの、強い毒性のためその使用が避けられている。
りん酸塩は水中の硬度成分と金属表面に不溶性の沈澱皮
膜を形成して腐食を抑制するため、補給水として純水あ
るいは軟水を供給する水系や、水中に低濃度の硬度成分
しか含まれない密閉循環冷却水系などでは十分な防食効
果を発揮しないうえ、環境に排出されると河川や湖水の
富栄養化の原因となり好ましくない。亜鉛塩はカソード
防食剤として効果が高く、りん酸塩などと併用して現在
多く使用されているが、その毒性のため使用が次第に制
限されつつある。亜硝酸塩は不動態型防食剤として密閉
循環冷却水系では優れた防食効果を有するが、開放循環
冷却水系では亜硝酸酸化細菌により容易に硝酸塩に分解
され効果を失うため、使用の範囲が限定されている。That is, although chromate has an excellent anticorrosive effect, its use is avoided because of its strong toxicity.
Phosphate forms a hardness component in water and an insoluble precipitate film on the metal surface to suppress corrosion, so it contains only a low-concentration hardness component in the water system that supplies pure water or soft water as makeup water. In a closed circulation cooling water system, etc., the anticorrosion effect is not sufficiently exerted, and when discharged to the environment, it causes eutrophication of rivers and lakes, which is not preferable. Zinc salt is highly effective as a cathodic anticorrosive, and is often used in combination with phosphates, etc., but its use is gradually being limited due to its toxicity. Nitrite has an excellent anticorrosive effect as a passive type anticorrosive in a closed circulating cooling water system, but in an open circulating cooling water system, it is easily decomposed into nitrate by nitrite-oxidizing bacteria and loses its effect, so its range of use is limited. There is.
【０００５】これらの防食剤に対し、モリブデン酸塩は
比較的安全で、不動態型防食剤として優れた防食効果を
有することから、近年使用されるケースが増えてきてい
る。しかしながら、モリブデン酸塩は、水中に高濃度の
鉄を含む水質環境下では、鉄の沈積によつて不動態皮膜
が破壊され、十分な防食効果を発揮しないという問題点
を抱えている。In contrast to these anticorrosive agents, molybdate is relatively safe and has an excellent anticorrosive effect as a passive type anticorrosive agent, so that it is increasingly used in recent years. However, molybdate has a problem that in a water environment containing a high concentration of iron in water, the passivation film is destroyed due to the deposition of iron, and a sufficient anticorrosive effect is not exhibited.
【０００６】本発明は、これら従来方法の有する問題点
を解決するもので、毒性などの心配がなく、高濃度の鉄
を含む厳しい水質環境下においても金属の腐食を有効に
抑制する金属腐食抑制剤および金属腐食抑制方法を提供
することを目的とする。The present invention solves the problems of these conventional methods. It is free from toxicity and effectively suppresses metal corrosion even under severe water environment containing high concentration of iron. An object of the present invention is to provide an agent and a method for inhibiting metal corrosion.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
になされた本発明よりなる金属腐食抑制剤は、モリブデ
ン酸塩およびオキシカルボン酸化合物を含有することを
特徴とし、また本発明よりなる金属腐食抑制方法は、水
系にモリブデン酸塩およびオキシカルボン酸化合物と併
用添加することを特徴とするものである。MEANS FOR SOLVING THE PROBLEMS A metal corrosion inhibitor according to the present invention made to achieve the above object is characterized by containing a molybdate and an oxycarboxylic acid compound, and a metal according to the present invention. The corrosion inhibition method is characterized by adding a molybdate and an oxycarboxylic acid compound together to an aqueous system.
【０００８】本発明の金属腐食抑制剤および金属腐食抑
制方法に用いられる必須成分のひとつであるモリブデン
酸塩は、モリブデン酸のアルカリ金属塩、アルカリ土類
金属塩、アンモニウム塩、アルカノールアミン塩などで
あり、例えばモリブデン酸ナトリウム、モリブデン酸カ
リウム、モリブデン酸アンモニウムなどが挙げられる。Molybdate, which is one of the essential components used in the metal corrosion inhibitor and the metal corrosion inhibition method of the present invention, is an alkali metal salt of molybdic acid, an alkaline earth metal salt, an ammonium salt, an alkanolamine salt, or the like. Examples thereof include sodium molybdate, potassium molybdate, and ammonium molybdate.
【０００９】本発明の金属腐食抑制剤および金属腐食抑
制方法に用いられる他の必須成分であるオキシカルボン
酸化合物は、ヒドロキシ基を有する有機酸またはその塩
であってキレート作用を示す化合物であり、例えばクエ
ン酸、グルコン酸、酒石酸、乳酸、リンゴ酸などのオキ
シカルボン酸およびそれらの塩から選ばれる少なくとも
１種である。An oxycarboxylic acid compound which is another essential component used in the metal corrosion inhibitor and the metal corrosion inhibition method of the present invention is an organic acid having a hydroxy group or a salt thereof and showing a chelating action, For example, it is at least one selected from oxycarboxylic acids such as citric acid, gluconic acid, tartaric acid, lactic acid, malic acid and salts thereof.
【００１０】本発明の金属腐食抑制剤および金属腐食抑
制方法におけるモリブデン酸塩とオキシカルボン酸化合
物は、重量比で１：０．０５ないし１：２、好ましくは
１：０．１ないし１：１の範囲で配合するか、あるいは
併用添加することにより、最大の相乗効果を発揮し、水
中の金属イオンの影響を抑え、金属表面に安定な不動態
皮膜を形成させて金属の腐食を有効に抑えることができ
る。なお、モリブデン酸塩に対するオキシカルボン酸の
配合割合が０．０５未満の場合や、２を超える場合は、
上記範囲のものに比べて、金属腐食抑制効果が多少劣
る。The weight ratio of the molybdate to the oxycarboxylic acid compound in the metal corrosion inhibitor and the metal corrosion inhibition method of the present invention is 1: 0.05 to 1: 2, preferably 1: 0.1 to 1: 1. The maximum synergistic effect is exhibited by mixing in the range of or in combination with each other, the effect of metal ions in water is suppressed, and a stable passivation film is formed on the metal surface to effectively suppress metal corrosion. be able to. When the mixing ratio of oxycarboxylic acid to molybdate is less than 0.05 or exceeds 2,
The effect of suppressing metal corrosion is somewhat inferior to that of the above range.
【００１１】本発明の金属腐食抑制剤は、あらかじめモ
リブデン酸とオキシカルボン酸化合物とを混合したもの
を、冷却水や循環水等の水中に１５〜１２００ｍｇ／
ｌ、好ましくは４０〜６００ｍｇ／ｌの濃度で添加する
ことにより、冷却水や循環水に接触する金属の腐食を有
効に抑制することができる。The metal corrosion inhibitor of the present invention comprises a mixture of molybdic acid and an oxycarboxylic acid compound in advance, which is added to water such as cooling water or circulating water in an amount of 15 to 1200 mg /
By adding it at a concentration of 1, preferably 40 to 600 mg / l, it is possible to effectively suppress the corrosion of the metal in contact with the cooling water or the circulating water.
【００１２】また、本発明においては、モリブデン酸塩
とオキシカルボン酸化合物とを各々単独に添加してもよ
い。その場合の両成分の添加量は、モリブデン酸塩が１
０〜１０００ｍｇ／ｌ、好ましくは３０〜５００ｍｇ／
ｌであり、オキシカルボン酸化合物が５〜２００ｍｇ／
ｌ、好ましくは１０〜１００ｍｇ／ｌとすることで、金
属の腐食を有効に抑制することができる。In the present invention, the molybdate and the oxycarboxylic acid compound may be added individually. In that case, the addition amount of both components is 1 molybdate.
0 to 1000 mg / l, preferably 30 to 500 mg /
1 and the oxycarboxylic acid compound is 5 to 200 mg /
By setting it to 1, preferably 10 to 100 mg / l, metal corrosion can be effectively suppressed.
【００１３】本発明の金属腐食抑制剤および金属腐食抑
制方法は、密閉もしくは開放循環冷却水系、加熱循環水
系またはボイラ水系の金属の腐食抑制に適用することが
できる。The metal corrosion inhibitor and the metal corrosion inhibition method of the present invention can be applied to metal corrosion inhibition of a closed or open circulating cooling water system, a heating circulating water system or a boiler water system.
【００１４】本発明の金属腐食抑制剤および金属腐食抑
制方法に用いる上記成分に加えて、防食効果を阻害しな
い範囲で、ホスホン酸類、りん酸塩、珪酸塩、亜硝酸
塩、タングステン酸塩、ホウ酸、亜鉛塩、芳香族カルボ
ン酸類、亜硫酸塩、ヒドラジン、タンニン、リグニン、
リグニンスルホン酸、アスコルビン酸ナトリウム、エル
ソルビン酸ナトリウム、グルコースなどの防食剤、ポリ
アクリル酸、ポリマレイン酸、ポリメタクリル酸、ポリ
スチレンスルホン酸、ポリイタコン酸、ポリホスフェー
ト、ポリイソブチレン酸／またはそれらの水溶性塩など
のスケール防止剤、べンゾトリアゾール、トリルトリア
ゾール、メルカプトベンゾチアゾールなどのアゾール系
銅防食剤、アンモニウム系化合物、アミン系化合物、塩
素系化合物、有機窒素硫黄系化合物などの殺菌・殺藻
剤、エチレンジアミン四酢酸、ニトリロ三酢酸などのキ
レート剤と併用したり、配合することは何ら差し支えな
い。In addition to the above-mentioned components used in the metal corrosion inhibitor and the metal corrosion inhibition method of the present invention, phosphonic acids, phosphates, silicates, nitrites, tungstates, boric acids are used as long as they do not impair the anticorrosion effect. , Zinc salt, aromatic carboxylic acids, sulfite, hydrazine, tannin, lignin,
Anticorrosion agents such as lignin sulfonic acid, sodium ascorbate, sodium ersorbate, glucose, polyacrylic acid, polymaleic acid, polymethacrylic acid, polystyrene sulfonic acid, polyitaconic acid, polyphosphate, polyisobutylene acid / or their water-soluble salts, etc. Scale inhibitors, azo copper anticorrosives such as benzotriazole, tolyltriazole and mercaptobenzothiazole, ammonium compounds, amine compounds, chlorine compounds, organic nitrogen-sulfur compounds such as bactericidal / algicides, ethylenediamine There is no problem with using or blending with a chelating agent such as tetraacetic acid or nitrilotriacetic acid.
【００１５】[0015]
【作用】本発明の金属腐食抑制剤および金属腐食抑制方
法の防食機能発現のメカニズムは、モリブデン酸塩とオ
キシカルボン酸化合物を併用することにより、相乗効果
によって、腐食を進行させる水中の鉄イオンの影響を抑
え、金属の表面に安定な不動態皮膜を形成し、金属を水
中の溶存酸素やＣｌ-、ＳＯ2- 4等の腐食因子から隔離す
ることによつて達成されると考えられる。以下に本発明
の実施例を説明する。The mechanism of the anticorrosion function of the metal corrosion inhibitor and the metal corrosion inhibition method of the present invention is that the combined use of a molybdate and an oxycarboxylic acid compound results in a synergistic effect of iron ions in water that promotes corrosion. effect suppressed, to form a stable passive film on the surface of the metal, the metal in the water of dissolved oxygen and Cl -, considered by connexion is achieved to be isolated from corrosive factors such as SO 2-4. Examples of the present invention will be described below.
【００１６】[0016]
【実施例】表１に示す水質の戸田市水に、（ＮＨ4）2Ｆ
ｅ（ＳＯ4）2・６Ｈ2Ｏを２００ｍｇ／ｌ（＝約５０ｍ
ｇＦｅ／ｌ）添加したものを腐食試験用水として用い
た。表２に示した各種の化合物を添加し、かつｐＨ７に
調整した試験溶液を調製し、試験溶液１リットル中にあ
らかじめ重量を測定したテストピース（ＪＩＳ ＳＳ４
００：８０×２０×２ｍｍ）を投入し、室温下に１５０
ｒｐｍで撹拌させながら７日間浸漬した。試験終了後、
テストピースの表面の錆を除去した後重量を測定し、減
量分から腐食速度（ｍｇ／ｄｍ2・ｄａｙ）を算出し
た。その結果を表２に示す。[Example] To the Toda City water of the water quality shown in Table 1, (NH 4 ) 2 F
e (SO 4) 2 · 6H 2 O and 200 mg / l (= about 50m
What added gFe / l) was used as water for corrosion tests. A test piece prepared by adding various compounds shown in Table 2 and adjusting the pH to 7 and measuring the weight in advance in 1 liter of the test solution (JIS SS4
00: 80 × 20 × 2 mm) and put it at room temperature for 150
Immersion was carried out for 7 days while stirring at rpm. After the test,
After removing the rust on the surface of the test piece, the weight was measured, and the corrosion rate (mg / dm 2 · day) was calculated from the weight loss. The results are shown in Table 2.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２の結果から、比較例２〜５に示したよ
うなモリブデン酸塩もしくはオキシカルボン酸単独の金
属腐食抑制剤に比較して、実施例１〜７に示した本発明
の金属腐食抑制剤は明らかに腐食抑制効果に優れてお
り、モリブデン酸塩とオキシカルボン酸の相乗効果が認
められた。From the results of Table 2, the metal corrosion inhibitors of the present invention shown in Examples 1 to 7 are compared with the metal corrosion inhibitors containing molybdate or oxycarboxylic acid alone as shown in Comparative Examples 2 to 5. The inhibitor was obviously excellent in corrosion inhibition effect, and a synergistic effect of molybdate and oxycarboxylic acid was observed.
【００２０】なお、比較例６〜７に示したように、オキ
シカルボン酸以外のキレート剤とモリブデン酸塩を組み
合わせた金属腐食抑制剤は、満足のいく腐食抑制効果が
得られなかった。As shown in Comparative Examples 6 to 7, the metal corrosion inhibitor obtained by combining the chelating agent other than oxycarboxylic acid with the molybdate did not have a satisfactory corrosion inhibiting effect.
【００２１】[0021]
【発明の効果】本発明の金属腐食抑制剤および金属腐食
抑制方法は、従来の金属腐食抑制剤が抱えていた毒性等
の心配がなく、また、厳しい水質環境下においても表２
に示すとおり優れた防食効果を発揮することから、設備
の恒久化などを通して産業に与える影響は大きいものと
考えられる。INDUSTRIAL APPLICABILITY The metal corrosion inhibitor and the metal corrosion inhibition method of the present invention do not have the concern of toxicity and the like which the conventional metal corrosion inhibitors have, and also in a severe water environment.
As shown in Fig. 3, it has an excellent anticorrosion effect, so it is thought that the impact on industry will be great through the permanent use of equipment.
【００２２】なお、上記実施例では、腐食速度を加速す
るために腐食試験用水として市水に鉄塩を添加してＦｅ
濃度を極端に増加させた水を用いたが、本発明の金属腐
食抑制剤は、Ｆｅ濃度がこれより低い通常の市水や工業
用水等に対しても優れた腐食抑制効果を発揮するのは言
うまでもない。In the above embodiment, in order to accelerate the corrosion rate, iron salt was added to city water as corrosion test water to obtain Fe.
Although water with an extremely increased concentration was used, the metal corrosion inhibitor of the present invention exhibits an excellent corrosion inhibition effect even on ordinary city water or industrial water having a lower Fe concentration. Needless to say.
Claims (6)
化合物を必須成分として含有することを特徴とする金属
腐食抑制剤。1. A metal corrosion inhibitor comprising a molybdate and an oxycarboxylic acid compound as essential components.
ルコン酸、酒石酸、乳酸、リンゴ酸およびそれらの塩か
ら選ばれる少なくとも１種であることを特徴とする請求
項１記載の金属腐食抑制剤。2. The metal corrosion inhibitor according to claim 1, wherein the oxycarboxylic acid compound is at least one selected from citric acid, gluconic acid, tartaric acid, lactic acid, malic acid and salts thereof.
物の配合割合が、重量比で１：０．０５ないし１：２で
ある請求項１記載の金属腐食抑制剤。3. The metal corrosion inhibitor according to claim 1, wherein the mixing ratio of the molybdate and the oxycarboxylic acid compound is 1: 0.05 to 1: 2 by weight.
化合物を併用添加することを特徴とする水系における金
属腐食抑制方法。4. A method for inhibiting metal corrosion in an aqueous system, which comprises adding a molybdate and an oxycarboxylic acid compound together.
ルコン酸、酒石酸、乳酸、リンゴ酸およびそれらの塩か
ら選ばれる少なくとも１種であることを特徴とする請求
項４記載の金属腐食抑制方法。5. The method for inhibiting metal corrosion according to claim 4, wherein the oxycarboxylic acid compound is at least one selected from citric acid, gluconic acid, tartaric acid, lactic acid, malic acid and salts thereof.
物の添加割合が、重量比で１：０．０５ないし１：２で
ある請求項４記載の金属腐食抑制方法。6. The method for inhibiting metal corrosion according to claim 4, wherein the molybdate and the oxycarboxylic acid compound are added in a weight ratio of 1: 0.05 to 1: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10327693A JPH06306652A (en) | 1993-04-28 | 1993-04-28 | Corrosion inhibitor for metal and corrosion inhibiting method for metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10327693A JPH06306652A (en) | 1993-04-28 | 1993-04-28 | Corrosion inhibitor for metal and corrosion inhibiting method for metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06306652A true JPH06306652A (en) | 1994-11-01 |
Family
ID=14349848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10327693A Pending JPH06306652A (en) | 1993-04-28 | 1993-04-28 | Corrosion inhibitor for metal and corrosion inhibiting method for metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06306652A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996039549A1 (en) * | 1995-06-05 | 1996-12-12 | Betzdearborn Inc. | Method for inhibiting metal corrosion in large scale water systems |
| JPH10306232A (en) * | 1997-05-07 | 1998-11-17 | Toyo Alum Kk | Aluminum pigment composition |
| JP2000000558A (en) * | 1998-06-15 | 2000-01-07 | Toray Eng Co Ltd | Treatment of ion exchange resin regeneration waste solution |
| JP2003073865A (en) * | 2001-08-30 | 2003-03-12 | Katayama Chem Works Co Ltd | Treatment method for water in boiler |
| CN102268676A (en) * | 2011-08-03 | 2011-12-07 | 上海电力学院 | Environment-friendly compounded corrosion inhibitor for yellow brass and application thereof |
| JP2014502310A (en) * | 2010-11-11 | 2014-01-30 | リバートツプ・リニユーワブルズ | Corrosion inhibiting composition |
| US8961813B2 (en) | 2006-08-07 | 2015-02-24 | The University Of Montana | Hydroxycarboxylic acids and salts |
| US9096787B2 (en) | 2012-11-28 | 2015-08-04 | Rivertop Renewables | Corrosion inhibiting, freezing point lowering compositions |
| US9162959B2 (en) | 2006-08-07 | 2015-10-20 | The University Of Montana | Method of oxidation using nitric acid |
| US9187398B2 (en) | 2013-03-13 | 2015-11-17 | Rivertop Renewables, Inc. | Nitric acid oxidation processes |
| US9315624B2 (en) | 2007-11-15 | 2016-04-19 | The University Of Montana | Hydroxypolyamide gel forming agents |
| US9346736B2 (en) | 2013-03-13 | 2016-05-24 | Rivertop Renewables, Inc. | Oxidation process |
| US9347024B2 (en) | 2011-04-21 | 2016-05-24 | Rivertop Renewables, Inc. | Calcium sequestering composition |
| US9670124B2 (en) | 2013-03-13 | 2017-06-06 | Rivertop Renewables, Inc. | Nitric acid oxidation process |
| JP2018028126A (en) * | 2016-08-17 | 2018-02-22 | 株式会社片山化学工業研究所 | Water treatment agent of boiler and water treatment method of boiler using the same |
| CN115011967A (en) * | 2022-08-05 | 2022-09-06 | 山东祺裕新材料有限公司 | Low-ammonia-nitrogen acid pickling corrosion inhibitor and use method thereof |
-
1993
- 1993-04-28 JP JP10327693A patent/JPH06306652A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996039549A1 (en) * | 1995-06-05 | 1996-12-12 | Betzdearborn Inc. | Method for inhibiting metal corrosion in large scale water systems |
| JPH10306232A (en) * | 1997-05-07 | 1998-11-17 | Toyo Alum Kk | Aluminum pigment composition |
| JP2000000558A (en) * | 1998-06-15 | 2000-01-07 | Toray Eng Co Ltd | Treatment of ion exchange resin regeneration waste solution |
| JP2003073865A (en) * | 2001-08-30 | 2003-03-12 | Katayama Chem Works Co Ltd | Treatment method for water in boiler |
| US8961813B2 (en) | 2006-08-07 | 2015-02-24 | The University Of Montana | Hydroxycarboxylic acids and salts |
| US9162959B2 (en) | 2006-08-07 | 2015-10-20 | The University Of Montana | Method of oxidation using nitric acid |
| US9505882B2 (en) | 2007-11-15 | 2016-11-29 | The University Of Montana | Hydroxypolyamide gel forming agents |
| US9315624B2 (en) | 2007-11-15 | 2016-04-19 | The University Of Montana | Hydroxypolyamide gel forming agents |
| US9404188B2 (en) | 2010-11-11 | 2016-08-02 | Rivertop Renewables | Corrosion inhibiting composition |
| JP2014502310A (en) * | 2010-11-11 | 2014-01-30 | リバートツプ・リニユーワブルズ | Corrosion inhibiting composition |
| CN106048616A (en) * | 2010-11-11 | 2016-10-26 | 里弗领袖可再生能源公司 | Corrosion inhibiting composition |
| US9347024B2 (en) | 2011-04-21 | 2016-05-24 | Rivertop Renewables, Inc. | Calcium sequestering composition |
| CN102268676A (en) * | 2011-08-03 | 2011-12-07 | 上海电力学院 | Environment-friendly compounded corrosion inhibitor for yellow brass and application thereof |
| US9096787B2 (en) | 2012-11-28 | 2015-08-04 | Rivertop Renewables | Corrosion inhibiting, freezing point lowering compositions |
| US9187398B2 (en) | 2013-03-13 | 2015-11-17 | Rivertop Renewables, Inc. | Nitric acid oxidation processes |
| US9346736B2 (en) | 2013-03-13 | 2016-05-24 | Rivertop Renewables, Inc. | Oxidation process |
| US9670124B2 (en) | 2013-03-13 | 2017-06-06 | Rivertop Renewables, Inc. | Nitric acid oxidation process |
| US9758462B2 (en) | 2013-03-13 | 2017-09-12 | Rivertop Renewables, Inc. | Nitric acid oxidation processes |
| JP2018028126A (en) * | 2016-08-17 | 2018-02-22 | 株式会社片山化学工業研究所 | Water treatment agent of boiler and water treatment method of boiler using the same |
| CN115011967A (en) * | 2022-08-05 | 2022-09-06 | 山东祺裕新材料有限公司 | Low-ammonia-nitrogen acid pickling corrosion inhibitor and use method thereof |
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