EP0224580B1 - Utilisation de 3-amino-5-(w-hydroxyalkyl)-1,2,4-triazoles comme inhibiteurs de corrosion pour metaux lourds non-ferreux dans des systemes aqueux - Google Patents

Utilisation de 3-amino-5-(w-hydroxyalkyl)-1,2,4-triazoles comme inhibiteurs de corrosion pour metaux lourds non-ferreux dans des systemes aqueux Download PDF

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Publication number
EP0224580B1
EP0224580B1 EP86904121A EP86904121A EP0224580B1 EP 0224580 B1 EP0224580 B1 EP 0224580B1 EP 86904121 A EP86904121 A EP 86904121A EP 86904121 A EP86904121 A EP 86904121A EP 0224580 B1 EP0224580 B1 EP 0224580B1
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EP
European Patent Office
Prior art keywords
compounds
triazoles
amino
aqueous systems
corrosion inhibitors
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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
Application number
EP86904121A
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German (de)
English (en)
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EP0224580A1 (fr
Inventor
Josef Penninger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
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Henkel AG and Co KGaA
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Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT86904121T priority Critical patent/ATE47159T1/de
Publication of EP0224580A1 publication Critical patent/EP0224580A1/fr
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Publication of EP0224580B1 publication Critical patent/EP0224580B1/fr
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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
    • C23F11/14—Nitrogen-containing compounds
    • C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom

Definitions

  • the invention relates to new corrosion inhibitors for non-ferrous metals in aqueous systems.
  • Non-ferrous metals for example copper or zinc, or alloys containing them, such as. B. brass or bronze, are preferred because of their relatively high corrosion resistance as materials in the construction of water-carrying systems such as steam generating systems, heating systems, cooling water circuits or other technical systems. These materials are particularly important as condenser tube materials in steam power plants. Despite the relatively good resistance to corrosion, however, it is unavoidable that in the normal state analytically detectable amounts of the high-quality materials, in particular copper, are released into the water flowing through. Traces of copper in particular are deposited on downstream cooling water pipes made of steel or other less noble metals or metal alloys, where they lead to sometimes devastating pitting corrosion.
  • DE-OS 29 34 61 discloses the use of 3-amino-5-alkyl-1,2,4-triazoles for corrosion inhibition on non-ferrous metals in aqueous process water systems. Although these compounds have better application properties than the aforementioned corrosion inhibitors and are also relatively easily accessible. However, their impact falls short of the requirements.
  • the invention relates to the use of 3-amino-5- (w-hydroxyalkyl) -1,2,4-triazoles of the general formula 1 in which n is an integer in the range from 1 to 12, or their salts of inorganic or organic acids as corrosion inhibitors for non-ferrous metals in aqueous systems.
  • the substituent in the 5-position of the triazole ring is therefore preferably 7-hydroxyheptyl, 8-hydroxyoctyl, 9-hydroxynonyl, 10-hydroxydecyl, 11-hydroxyundecyl or 12-hydroxydodecyl.
  • the 3-amino-5- (w-hydroxyalkyl) -1,2,4-triazoles used according to the invention are prepared by methods known per se.
  • the triazole derivatives can be prepared by reacting a, W -hydroxycarboxylic acids with aminoguanidine or aminoguanidine hydrogen carbonate.
  • w-hydroxycarboxylic acids which have a number of C atoms in the range from 4 to 6, the corresponding lactones can also be used for such a reaction.
  • the implementation follows, for example, the following reaction scheme:
  • salts of compounds of the general formula (I) can also be used for use in anticorrosive agents.
  • Salts of both inorganic and organic acids are suitable.
  • Preferred salts of inorganic acids are the chlorides, sulfates or phosphates of the compounds of the general formula (I)
  • salts of organic acids are the acetates, citrates or glycolates (salts of glycolic acid) of the 1,2,4-triazole derivatives of the general Formula (I) are preferred.
  • the compounds mentioned can be used individually or in mixtures with one another in any ratio for use in anti-corrosion agents.
  • the compounds of the formula (I) or their salts are dissolved directly in aqueous systems by methods known per se or are added to the respective aqueous systems in the form of aqueous concentrates.
  • the amount of the compounds mentioned, which are added to the aqueous systems are in the range from 0.05 to 10 g-m -3 .
  • a preferred range is from 0.1 to 5 g-m- 3 .
  • the compounds of general formula (I) or their salts of inorganic or organic acids can be used in industrial water, cooling water, lubricants and in cleaners for household and industrial purposes.
  • the pH of such aqueous systems is usually in the range from 6 to 10.
  • the corrosion protection properties were determined by determining the mass removal in accordance with DIN 50905 / 1-4.
  • test water used as a corrosive medium was produced in accordance with DIN 51360/2 and buffered with ammonia / ammonium chloride to a pH of 9.0.
  • a stands for the weight loss of the test sample and b for the weight loss of the blank sample.

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

Des 3-amino-5-(omega-hydroxyalkyl)-1,2,4-triazoles de formule générale (I) où n représente un nombre entre 1 et 12, ou leurs sels d'acides inorganiques ou organiques sont utilisés comme inhibiteurs de corrosion pour métaux lourds non-ferreux dans des systèmes aqueux.

Claims (6)

1. Utilisation de 3-amino-5-(w-hydroxyalkyl)-1,2,4-triazoles de formule générale (I)
Figure imgb0007
dans laquelle n représente un nombre entier de 1 à 12, ou de leurs sels d'acides inorganiques ou organiques comme inhibiteurs de corrosion pour les métaux lourds non-ferreux dans les systèmes aqueux.
2. Utilisation de composés selon la revendication 1, caractérisé en ce que n représente un .nombre entier de 7 à 12.
3. Utilisation de composés selon les revendications 1 et 2, caractérisée en ce que l'on préfère comme sels d'acides inorganiques les chlorures, les sulfates ou les phosphates.
4. Utilisation de composés selon les revendications 1 et 2, caractérisée en ce que l'on préfère comme sels d'acides organiques les acétates, les citrates ou les glycolates.
5. Utilisation de composés selon les revendications 1 à 4 en quantités de 0,05 à 10 g. m-3, de préférence de 0,1 à 5 g - m-3.
6. Utilisation de composés selon les revendications 1 à 5 dans les eaux industrielles, les eaux de refroidissement, les lubrifiants et les nettoyants pour usages domestiques et industriels.
EP86904121A 1985-05-31 1986-05-23 Utilisation de 3-amino-5-(w-hydroxyalkyl)-1,2,4-triazoles comme inhibiteurs de corrosion pour metaux lourds non-ferreux dans des systemes aqueux Expired EP0224580B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86904121T ATE47159T1 (de) 1985-05-31 1986-05-23 Verwendung von 3-amino-5-(w-hydroxyalkyl)-1,2,4- triazolen als korrosionsinhibitoren fuer buntmetalle in waessrigen systemen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853519522 DE3519522A1 (de) 1985-05-31 1985-05-31 Verwendung von 3-amino-5((omega)-hydroxyalkyl)-1,2,4-triazolen als korrosionsinhibitoren fuer buntmetalle in waessrigen systemen
DE3519522 1985-05-31

Publications (2)

Publication Number Publication Date
EP0224580A1 EP0224580A1 (fr) 1987-06-10
EP0224580B1 true EP0224580B1 (fr) 1989-10-11

Family

ID=6272092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904121A Expired EP0224580B1 (fr) 1985-05-31 1986-05-23 Utilisation de 3-amino-5-(w-hydroxyalkyl)-1,2,4-triazoles comme inhibiteurs de corrosion pour metaux lourds non-ferreux dans des systemes aqueux

Country Status (6)

Country Link
US (1) US4734257A (fr)
EP (1) EP0224580B1 (fr)
JP (1) JPS62503108A (fr)
DE (2) DE3519522A1 (fr)
ES (1) ES8708025A1 (fr)
WO (1) WO1986007098A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620025A1 (de) * 1986-06-13 1987-12-17 Henkel Kgaa Verwendung von acylierten 3-amino-1,2,4-triazolen als korrosionsinhibitoren fuer buntmetalle
US4948523A (en) * 1987-09-30 1990-08-14 Amoco Corporation Chlorine-free silver protective lubricant composition (I)
DE19701031C2 (de) * 1997-01-15 1998-12-10 Henkel Kgaa Verwendung von 3-Amino-5-alkyl-1,2,4-Triozolen als Silberschutzmittel
DE19758262A1 (de) * 1997-12-31 1999-07-08 Henkel Kgaa Alkylaminotriazolhaltige, granulare Komponente für den Einsatz in Maschinengeschirrspülmitteln (MGSM) und Verfahren zu dessen Herstellung
US6585933B1 (en) 1999-05-03 2003-07-01 Betzdearborn, Inc. Method and composition for inhibiting corrosion in aqueous systems
DE10118684C1 (de) * 2001-04-14 2003-01-02 Clariant Gmbh Korrosionsinhibitor für Badewässer, die Natriumchlorid und Magnesiumsulfat enthalten und dessen Verwendung
DE10322507A1 (de) * 2003-05-19 2004-12-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Korrosionsschutzmittel zum Schutz von Leichtmetallen
US7883738B2 (en) * 2007-04-18 2011-02-08 Enthone Inc. Metallic surface enhancement
US10017863B2 (en) * 2007-06-21 2018-07-10 Joseph A. Abys Corrosion protection of bronzes
TWI453301B (zh) * 2007-11-08 2014-09-21 Enthone 浸鍍銀塗層上的自組分子
US7972655B2 (en) * 2007-11-21 2011-07-05 Enthone Inc. Anti-tarnish coatings

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382087A (en) * 1964-08-20 1968-05-07 Pittsburgh Plate Glass Co Silver and copper coated articles protected by treatment with aminoazole compounds
US3553101A (en) * 1968-05-17 1971-01-05 Exxon Research Engineering Co Prevention of corrosion using heterocyclic nitrogen compounds
BE790955A (fr) * 1971-11-03 1973-05-03 Eastman Kodak Co Procede, composition et produit pour la photographie par diffusion-transfert de sels d'argent
US4098720A (en) * 1973-10-25 1978-07-04 Chemed Corporation Corrosion inhibition
DE2934461A1 (de) * 1979-08-25 1981-03-26 Henkel KGaA, 40589 Düsseldorf Korrosionsinhibitoren fuer buntmetalle
GB2094776B (en) * 1981-03-11 1984-05-16 Dearborn Chemicals Ltd Prevention of corrosion in aqueous systems

Also Published As

Publication number Publication date
US4734257A (en) 1988-03-29
ES8708025A1 (es) 1987-09-01
ES555544A0 (es) 1987-09-01
WO1986007098A1 (fr) 1986-12-04
EP0224580A1 (fr) 1987-06-10
DE3519522A1 (de) 1986-12-04
JPS62503108A (ja) 1987-12-10
DE3666231D1 (en) 1989-11-16

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