JP3372181B2 - Corrosion inhibitor and method for corrosion of iron-based metals in water system - Google Patents
Corrosion inhibitor and method for corrosion of iron-based metals in water systemInfo
- Publication number
- JP3372181B2 JP3372181B2 JP03961497A JP3961497A JP3372181B2 JP 3372181 B2 JP3372181 B2 JP 3372181B2 JP 03961497 A JP03961497 A JP 03961497A JP 3961497 A JP3961497 A JP 3961497A JP 3372181 B2 JP3372181 B2 JP 3372181B2
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- iron
- hydrogen
- corrosion inhibitor
- phosphonobutane
- 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 - Fee Related
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
- C23F11/10—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 using organic inhibitors
- C23F11/167—Phosphorus-containing compounds
-
- 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
- C23F11/10—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 using organic inhibitors
- C23F11/167—Phosphorus-containing compounds
- C23F11/1676—Phosphonic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄系金属で構成さ
れた設備内を循環する水系などに添加して用いられる金
属腐食防止剤、及び鉄系金属の腐食防止方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal corrosion inhibitor which is used by adding it to a water system or the like which circulates in equipment made of iron-based metal, and a method of preventing corrosion of iron-based metal.
【０００２】[0002]
【従来の技術】空調設備用の冷却水や産業用における冷
却水などは、熱交換によって温まった後冷却塔などに送
られ、空気と接触させて一部を蒸発することにより熱を
放出し、冷却した後再び冷却水として循環使用されるの
が普通である。このような循環水中の塩類は次第に濃縮
されて高濃度となり、設備や配管内部の腐食などの障害
を引き起こすこととなる。従って、蒸発して減少した水
を補給するとともに濃縮水の一部を時々排出して、塩類
濃度の調整を行なうことが必要であり、また防食用の水
処理用薬剤を添加することが行われている。2. Description of the Related Art Cooling water for air conditioning equipment, cooling water for industrial use, etc. are heated by heat exchange and then sent to a cooling tower or the like, which is brought into contact with air to partly evaporate heat, After cooling, it is usually recycled again as cooling water. Such salts in the circulating water are gradually concentrated to a high concentration, which causes troubles such as corrosion inside the equipment and piping. Therefore, it is necessary to replenish the water that has evaporated and reduced and to discharge a part of the concentrated water from time to time to adjust the salt concentration, and to add anti-corrosion water treatment chemicals. ing.
【０００３】このような冷却水系の装置には鉄系の材料
で製作された機器が多く用いられており、こうした鉄系
材料に対する腐食防止剤として、従来からクロム酸塩、
亜鉛塩等の重金属塩類や、燐酸化合物などが使用されて
きたが、これらは環境汚染の点からみて無制限に使用す
ることは好ましくない。そこで近年、ある種のホスフィ
ノカルボン酸類を、亜鉛塩やモリブデン酸塩等の重金属
化合物と併用するか、或いはポリリン酸塩やケイ酸塩等
のスケール生成因子と併用することが提案されている
（特開昭５５−１４９００号、特開昭６３−２８７６０
０号）。Equipment made of iron-based materials is often used for such cooling water-based devices, and as a corrosion inhibitor for such iron-based materials, chromate,
Heavy metal salts such as zinc salts and phosphoric acid compounds have been used, but it is not preferable to use these indefinitely from the viewpoint of environmental pollution. Therefore, in recent years, it has been proposed to use certain phosphinocarboxylic acids in combination with heavy metal compounds such as zinc salts and molybdates, or in combination with scale forming factors such as polyphosphates and silicates ( JP-A-55-14900, JP-A-63-28760
No. 0).
【０００４】[0004]
【発明が解決しようとする課題】しかしこれらの改良技
術でも、環境汚染の問題と防食効果との双方を同時に満
足させるには至っていない。そこで本発明は、低リン含
有量であってしかも重金属塩類やスケール生成因子を含
有せず、環境汚染の恐れが少なくて、使用量が少なくて
も鉄系金属材料に対して優れた防食効果を示す水系にお
ける腐食防止剤及び腐食防止方法を提供しようとするも
のである。However, even with these improved techniques, both the problem of environmental pollution and the anticorrosive effect have not been satisfied at the same time. Therefore, the present invention has a low phosphorus content and does not contain heavy metal salts or scale-forming factors, is less likely to cause environmental pollution, and has an excellent anticorrosion effect on iron-based metal materials even when used in a small amount. The present invention is intended to provide a corrosion inhibitor and a method for preventing corrosion in a water system.
【０００５】[0005]
【課題を解決するための手段】本発明の水系における鉄
系金属の腐食防止剤は、下記の一般式(I) で示されるホ
スフィン酸誘導体と、２−ホスホノブタン−１，２，４
トリカルボン酸とを有効成分として含有するものであ
る。A corrosion inhibitor for ferrous metals in an aqueous system according to the present invention comprises a phosphinic acid derivative represented by the following general formula (I) and 2-phosphonobutane-1,2,4.
It contains tricarboxylic acid as an active ingredient.
【化４】
式中、Ｒは−ＣＯＯＸ′又は−ＣＯＮＨ−Ｃ（ＣＨ3 ）
2 ＣＨ2 ＳＯ3 Ｘ′であり、同一分子中にこれら２種の
基が混在していてもよい。またＹは水素、−ＳＯ3 Ｘ″
又は−ＰＨＯＯＸ″から選ばれ、Ｘ、Ｘ′、Ｘ″は水素
又はアルカリ金属原子である。なおｍ及びｎはそれぞれ
０または正の整数であり、ｍ＋ｎは１〜１００の整数で
ある。また、前記の一般式(I) で示されるホスフィン酸
誘導体の中でも、Ｒが２種の基、即ち−ＣＯＯＸ′又は
−ＣＯＮＨ−Ｃ（ＣＨ3 ）2 ＣＨ2 ＳＯ3 Ｘ′が、同一
分子中に混在しているものであることが、特に好まし
い。[Chemical 4] In the formula, R is —COOX ′ or —CONH—C (CH 3 ).
2 CH 2 SO 3 X ', and these two groups may be mixed in the same molecule. The Y is hydrogen, -SO 3 X "
Or —PHOOX ″, where X, X ′, X ″ are hydrogen or an alkali metal atom. Note that m and n are each 0 or a positive integer, and m + n is an integer of 1 to 100. Among the phosphinic acid derivative represented by the general formula (I), R is two groups, namely -COOX 'or -CONH-C (CH 3) 2 CH 2 SO 3 X' is the same molecule It is particularly preferable that they are mixed.
【０００６】更に本発明の水系における鉄系金属の腐食
防止方法は、前記の一般式(I) で示されるホスフィン酸
誘導体と、２−ホスホノブタン−１，２，４トリカルボ
ン酸とを、１：１００〜１００：１の重量比で、水中に
有効成分濃度１〜１０００mg/lで存在させることを特徴
とするものである。Further, the method of preventing corrosion of iron-based metals in an aqueous system according to the present invention comprises adding the phosphinic acid derivative represented by the above general formula (I) and 2-phosphonobutane-1,2,4 tricarboxylic acid at a ratio of 1: 100. It is characterized by being present in water at a concentration of the active ingredient of 1-1000 mg / l in a weight ratio of -100: 1.
【０００７】[0007]
【発明の実施の形態】本発明の鉄系金属の腐食防止剤の
成分であるホスフィン酸誘導体は、前記の一般式(I) で
示される化合物であるが、式中のＲが−ＣＯＯＸ′又は
−ＣＯＮＨ−Ｃ（ＣＨ3 ）2 ＣＨ2 ＳＯ3 Ｘ′であり、
同一分子中にこれら２種の基が混在していてもよいもの
である。かかる特殊なホスフィン酸誘導体としては、例
えばＦＭＣ社から罐石生成防止剤としてベルクリン４０
０、或いはベルスパース１６４などの商品名で販売され
ている薬剤などが好ましく使用できる。BEST MODE FOR CARRYING OUT THE INVENTION The phosphinic acid derivative which is a component of the corrosion inhibitor for iron-based metals of the present invention is a compound represented by the above general formula (I), wherein R in the formula is --COOX 'or a -CONH-C (CH 3) 2 CH 2 SO 3 X ',
These two types of groups may be mixed in the same molecule. As such a special phosphinic acid derivative, for example, Berkulin 40 from FMC Co.
0 or a drug sold under the trade name of Velspers 164 or the like can be preferably used.
【０００８】また本発明において、前記のホスフィン酸
誘導体と併用される２−ホスホノブタン−１，２，４ト
リカルボン酸は、遊離の酸であってもよいが、塩であっ
てもよく、中でもナトリウム塩、カリウム塩、或いはア
ンモニウム塩などの水溶性の塩が好ましく用いられる。In the present invention, the 2-phosphonobutane-1,2,4 tricarboxylic acid used in combination with the above-mentioned phosphinic acid derivative may be a free acid, or may be a salt, among which sodium salt. Water-soluble salts such as potassium salt, potassium salt, and ammonium salt are preferably used.
【０００９】上記のホスフィン酸誘導体と２−ホスホノ
ブタン−１，２，４トリカルボン酸とは、処理対象の水
系に対して別々に添加することもできるが、あらかじめ
１剤となるように配合するか、又は２剤以上の別包装と
して組み合わせた腐食防止剤として用いることができ、
その場合水などの溶剤に溶解したものであってもよい。
更にかかる本発明の腐食防止剤は、前記の有効成分の
他、例えばポリアクリル酸、ポリマレイン酸、ホスホン
酸、ポリメタクリル酸、又はこれらの塩などのスケール
防止剤、例えば５−クロロ−２−メチル−４−イソチア
ゾリン−３−オン、２−メチル−４−イソチアゾリン−
３−オン、１，２−ベンゾイソチアゾリン−３−オン等
のイソチアゾロン化合物、例えば２，２−ジブロモ−３
−ニトリロプロピオンアミド、２−ブロモ−２−ニトロ
−１，３−プロパンジオール等のブロモ系化合物、例え
ばグルタルアルデヒド、フタルアルデヒド等のアルデヒ
ド類、例えば過酸化水素、次亜塩素酸ナトリウム等の無
機物類、更にジチオール化合物、メチレンビスチオシア
ネート類、ヨーネンポリマー、ホスホニウム塩類、４級
アンモニウム塩類などのスライム防止剤、例えばトリル
トリアゾール、ベンゾトリアゾール等のアゾール類、モ
リブデン酸塩、亜鉛塩などの金属に対する防食剤など、
各種の水処理剤などが含有されていてもよい。The above-mentioned phosphinic acid derivative and 2-phosphonobutane-1,2,4 tricarboxylic acid can be added separately to the aqueous system to be treated, but they may be added in advance so as to form one agent, or Or, it can be used as a corrosion inhibitor by combining two or more agents as separate packages,
In that case, it may be dissolved in a solvent such as water.
Further, the corrosion inhibitor of the present invention includes, in addition to the above-mentioned active ingredients, scale inhibitors such as polyacrylic acid, polymaleic acid, phosphonic acid, polymethacrylic acid, or salts thereof, such as 5-chloro-2-methyl. -4-isothiazolin-3-one, 2-methyl-4-isothiazolin-
Isothiazolone compounds such as 3-one and 1,2-benzisothiazolin-3-one, eg 2,2-dibromo-3
-Bromo compounds such as nitrilopropionamide and 2-bromo-2-nitro-1,3-propanediol, aldehydes such as glutaraldehyde and phthalaldehyde, inorganic substances such as hydrogen peroxide and sodium hypochlorite Further, slime inhibitors such as dithiol compounds, methylenebisthiocyanates, ionene polymers, phosphonium salts, quaternary ammonium salts, etc., anticorrosion agents for metals such as azoles such as tolyltriazole and benzotriazole, molybdate salts, zinc salts, etc. Such,
Various water treatment agents and the like may be contained.
【００１０】本発明において、ホスフィン酸誘導体と２
−ホスホノブタン−１，２，４トリカルボン酸との使用
比率は、重量比で１：１００〜１００：１の範囲にある
ことが好ましく、更に望ましくは１：５０〜５０：１で
ある。この範囲内では優れた相乗作用を発揮するが、範
囲の外では低濃度での効果が充分でない。また水に対す
るこれら薬剤の添加量は、水と接触する機器の材質にも
よるが、通常水中に有効成分として１〜１０００mg/lの
濃度で存在させるのがよく、特に１０〜１００mg/lの範
囲内となるよう添加することが好ましい。In the present invention, a phosphinic acid derivative and 2
The use ratio with -phosphonobutane-1,2,4 tricarboxylic acid is preferably in the range of 1: 100 to 100: 1 by weight, and more preferably 1:50 to 50: 1. An excellent synergistic effect is exhibited within this range, but the effect at low concentrations is insufficient outside the range. The amount of these agents added to water depends on the material of the equipment that comes into contact with water, but it is usually preferable to make them exist in water at a concentration of 1 to 1000 mg / l as an active ingredient, particularly in the range of 10 to 100 mg / l. It is preferable to add it so that it is within the range.
【００１１】[0011]
【実施例】ホスフィン酸誘導体として、式(I) の構造を
有していてＲが−ＣＯＯＨと−ＣＯＮＨ−Ｃ（ＣＨ3 ）
2 ＣＨ2 ＳＯ3 Ｎａとの混在した基で、ｍ＋ｎの平均値
が約１６である化合物Ａ（ＦＭＣ社、ベルクリン４０
０）、式(I) の構造を有していてＲが−ＣＯＯＨであ
り、ｍ＋ｎの平均値が約１６である化合物Ｂ（ＦＭＣ
社、ベルスパース１６４）、並びにポリアクリル酸（化
合物Ｃ）、２−ホスホノブタン−１，２，４トリカルボ
ン酸（化合物Ｄ）、１−ヒドロキシエチリデン−１、１
−ジホスホン酸（化合物Ｅ）を用意した。そしてつくば
市水道水に、これらの化合物Ａ〜Ｅをそれぞれ表１に示
す濃度(mg/l)となるよう添加した試験水を調製し、開放
容器に各試験水１０００mlを入れ、表面積０．２７dm2
の鋼片を浸漬し、長さ５０mmの攪拌子を用いて３００rp
m で攪拌を継続しながら３５℃で７日間腐食試験を行っ
た。鋼片の腐食減量から腐食度(mdd) を算出して、その
結果を表１に併せて示した。As EXAMPLES phosphinic acid derivatives of the formula I have the structure of (I) R is -COOH and -CONH-C (CH 3)
2 CH 2 SO 3 Na mixed group, compound A having an average value of m + n of about 16 (FMC, Berklin 40
0), the compound of the formula (I), R is —COOH, and the average value of m + n is about 16 (FMC
Berspers 164), as well as polyacrylic acid (compound C), 2-phosphonobutane-1,2,4 tricarboxylic acid (compound D), 1-hydroxyethylidene-1, 1
-Diphosphonic acid (Compound E) was prepared. Then, test water was prepared by adding each of these compounds A to E to Tsukuba City tap water so that the concentration (mg / l) shown in Table 1 was obtained, and 1000 ml of each test water was put into an open container to have a surface area of 0.27 dm 2. 2
Immerse the steel slab, and use a stirrer with a length of 50 mm for 300 rp
A corrosion test was performed at 35 ° C. for 7 days while continuing stirring at m 3. The corrosion degree (mdd) was calculated from the corrosion weight loss of the steel pieces, and the results are also shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】この結果から、特定のホスフィン酸誘導体
と、２−ホスホノブタン−１，２，４トリカルボン酸と
を組み合わせた本発明の腐食防止剤が、鉄系金属材料に
対して優れた防食性を示し、明らかな相乗効果を発揮す
るのに対して、その他の組み合わせでは通常予想される
程度の防食性を示すのみで、特に相乗効果が認められな
いことがわかる。From these results, the corrosion inhibitor of the present invention, which is a combination of a specific phosphinic acid derivative and 2-phosphonobutane-1,2,4 tricarboxylic acid, exhibits excellent anticorrosion properties for iron-based metallic materials. It can be seen that, while the synergistic effect is clearly exhibited, the other combinations only show the anticorrosive property which is usually expected and the synergistic effect is not particularly recognized.
【００１４】[0014]
【発明の効果】本発明の水系における鉄系金属の腐食防
止剤は、特定のホスフィン酸誘導体と２−ホスホノブタ
ン−１，２，４トリカルボン酸とを有効成分として含有
してなるものであって、それぞれの成分の相乗効果によ
って低濃度の使用で有効に鉄系金属材料の腐食を防止で
きるうえ、燐含有量が少なく、また重金属類やスケール
生成因子を含有しないので、環境汚染を引き起こす恐れ
がなく、装置の保守管理に関する負担が軽減される効果
がある。The corrosion inhibitor for ferrous metals in the aqueous system of the present invention comprises a specific phosphinic acid derivative and 2-phosphonobutane-1,2,4tricarboxylic acid as active ingredients. The synergistic effect of each component can effectively prevent the corrosion of iron-based metallic materials even at low concentrations, has a low phosphorus content, and does not contain heavy metals or scale-forming factors, so there is no risk of environmental pollution. The effect of reducing the maintenance and management of the device is effective.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−173651（ＪＰ，Ａ) 特開 昭51−115248（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23F 11/16 - 11/167 C07F 9/30 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-173651 (JP, A) JP-A-51-115248 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C23F 11/16-11/167 C07F 9/30
Claims (3)
酸誘導体と、２−ホスホノブタン−１，２，４トリカル
ボン酸とを有効成分として含有する水系における鉄系金
属の腐食防止剤。 【化１】 式中、Ｒは−ＣＯＯＸ′又は−ＣＯＮＨ−Ｃ（ＣＨ3 ）
2 ＣＨ2 ＳＯ3 Ｘ′であり、同一分子中にこれら２種の
基が混在していてもよい。またＹは水素、−ＳＯ3 Ｘ″
又は−ＰＨＯＯＸ″から選ばれ、Ｘ、Ｘ′、Ｘ″は水素
又はアルカリ金属原子である。なおｍ及びｎはそれぞれ
０または正の整数であり、ｍ＋ｎは１〜１００の整数で
ある。1. A corrosion inhibitor for an iron-based metal in an aqueous system, which comprises a phosphinic acid derivative represented by the following general formula (I) and 2-phosphonobutane-1,2,4tricarboxylic acid as active ingredients. [Chemical 1] In the formula, R is —COOX ′ or —CONH—C (CH 3 ).
2 CH 2 SO 3 X ', and these two groups may be mixed in the same molecule. The Y is hydrogen, -SO 3 X "
Or —PHOOX ″, where X, X ′, X ″ are hydrogen or an alkali metal atom. Note that m and n are each 0 or a positive integer, and m + n is an integer of 1 to 100.
酸誘導体と、２−ホスホノブタン−１，２，４トリカル
ボン酸とを有効成分として含有する水系における鉄系金
属の腐食防止剤。 【化２】 式中、Ｒは−ＣＯＯＸ′又は−ＣＯＮＨ−Ｃ（ＣＨ3 ）
2 ＣＨ2 ＳＯ3 Ｘ′であり、同一分子中にこれら２種の
基が混在している。またＹは水素、−ＳＯ3 Ｘ″又は−
ＰＨＯＯＸ″から選ばれ、Ｘ、Ｘ′、Ｘ″は水素又はア
ルカリ金属原子である。なおｍ及びｎはそれぞれ０また
は正の整数であり、ｍ＋ｎは１〜１００の整数である。2. A corrosion inhibitor for an iron-based metal in an aqueous system, which comprises a phosphinic acid derivative represented by the following general formula (I) and 2-phosphonobutane-1,2,4tricarboxylic acid as active ingredients. [Chemical 2] In the formula, R is —COOX ′ or —CONH—C (CH 3 ).
2 CH 2 SO 3 X ', and these two groups are mixed in the same molecule. The Y is hydrogen, -SO 3 X "or -
PHOOX ″, where X, X ′, X ″ are hydrogen or an alkali metal atom. Note that m and n are each 0 or a positive integer, and m + n is an integer of 1 to 100.
酸誘導体と、２−ホスホノブタン−１，２，４トリカル
ボン酸とを、１：１００〜１００：１の重量比で、水中
に有効成分濃度１〜１０００mg/lで存在させることを特
徴とする水系における鉄系金属の腐食防止方法。 【化３】 式中、Ｒは−ＣＯＯＸ′又は−ＣＯＮＨ−Ｃ（ＣＨ3 ）
2 ＣＨ2 ＳＯ3 Ｘ′であり、同一分子中にこれら２種の
基が混在していてもよい。またＹは水素、−ＳＯ3 Ｘ″
又は−ＰＨＯＯＸ″から選ばれ、Ｘ、Ｘ′、Ｘ″は水素
又はアルカリ金属原子である。なおｍ及びｎはそれぞれ
０または正の整数であり、ｍ＋ｎは１〜１００の整数で
ある。3. A phosphinic acid derivative represented by the following general formula (I) and 2-phosphonobutane-1,2,4 tricarboxylic acid in a weight ratio of 1: 100 to 100: 1 in water. A method for preventing corrosion of ferrous metals in an aqueous system, characterized in that the method is present at a concentration of 1 to 1000 mg / l. [Chemical 3] In the formula, R is —COOX ′ or —CONH—C (CH 3 ).
2 CH 2 SO 3 X ', and these two groups may be mixed in the same molecule. The Y is hydrogen, -SO 3 X "
Or —PHOOX ″, where X, X ′, X ″ are hydrogen or an alkali metal atom. Note that m and n are each 0 or a positive integer, and m + n is an integer of 1 to 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03961497A JP3372181B2 (en) | 1997-02-25 | 1997-02-25 | Corrosion inhibitor and method for corrosion of iron-based metals in water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03961497A JP3372181B2 (en) | 1997-02-25 | 1997-02-25 | Corrosion inhibitor and method for corrosion of iron-based metals in water system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10237679A JPH10237679A (en) | 1998-09-08 |
| JP3372181B2 true JP3372181B2 (en) | 2003-01-27 |
Family
ID=12557996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03961497A Expired - Fee Related JP3372181B2 (en) | 1997-02-25 | 1997-02-25 | Corrosion inhibitor and method for corrosion of iron-based metals in water system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3372181B2 (en) |
-
1997
- 1997-02-25 JP JP03961497A patent/JP3372181B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10237679A (en) | 1998-09-08 |
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