EP0162875B1 - Inhibiteurs de corrosion pour l'aluminium - Google Patents

Inhibiteurs de corrosion pour l'aluminium Download PDF

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Publication number
EP0162875B1
EP0162875B1 EP84904122A EP84904122A EP0162875B1 EP 0162875 B1 EP0162875 B1 EP 0162875B1 EP 84904122 A EP84904122 A EP 84904122A EP 84904122 A EP84904122 A EP 84904122A EP 0162875 B1 EP0162875 B1 EP 0162875B1
Authority
EP
European Patent Office
Prior art keywords
acid
combination
amino
aluminium
alkyl
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
Application number
EP84904122A
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German (de)
English (en)
Other versions
EP0162875A1 (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
Original Assignee
Henkel AG and Co KGaA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT84904122T priority Critical patent/ATE40839T1/de
Publication of EP0162875A1 publication Critical patent/EP0162875A1/fr
Application granted granted Critical
Publication of EP0162875B1 publication Critical patent/EP0162875B1/fr
Expired legal-status Critical Current

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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
    • C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids

Definitions

  • the invention relates to the use of a combination of 3-amino-5-alkyl-1,2,4-triazoles and aminotrimethylenephosphonic acid in a weight ratio of 10: 1 to 1: 1 as a corrosion inhibitor for aluminum in aqueous, acid-reacting systems.
  • alkali silicates or sodium benzoate.
  • suitable additives such as alkali silicates or sodium benzoate.
  • alkali silicates show a good activity in the neutral range and especially in the case of alkali silicates in the basic range.
  • alkali silicates are unusable, while the desired protection can only be achieved with sodium benzoate at high concentrations.
  • FR-A-2 014 864 describes a method for preventing the corrosion of aluminum and aluminum alloys in hydrochloric acid solutions at temperatures between 0 and 30 ° C.
  • the hydrochloric acid solutions which have an HCI concentration of 0.1 to 12 percent by weight, a soluble aminomethylenephosphonic acid or its salts in an amount of 0.5 to 20 percent by weight, based on the HCI content.
  • the aminomethylenephosphonic acid to be used contains at least two phosphonic acid groups in the molecule as well as a characteristic group of the general formula -N (CH 2 -PO 3 H 2 ) 2 .
  • Aminotri- (methylenephosphonic acid or ethylenediaminetetra- (methylenephosphonic acid) are preferably used.
  • inhibitors known per se for other metals can also be used.
  • EP-A-25 863 relates to the use of 3-amino-5-alkyl-1,2,4-triazoles - preferably having 5 to 7 carbon atoms in the alkyl radical - as corrosion inhibitors for non-ferrous metals, such as copper, brass, bronze or the like, in aqueous systems in the pH range from 6 to 10. These compounds are added to the aqueous systems in an amount of 0.05 to 10 g / m 3 , preferably 0.1 to 0.5 g / m 3 . In addition, additional stone protection and dispersing agents and / or complexing phosphonic acids can be used.
  • Suitable phosphonic acids are 1-hydroxyethane-1,1-disphosphonic acid, aminotrimethylene phosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, their water-soluble salts or mixtures of these compounds.
  • 3-amino-5-alkyl-1, 2,4-triazoles are suitable for this purpose, the alkyl radical of which has 2 to 10, preferably 7 to 9, carbon atoms.
  • aminotrimethylenephosphonic acid has also proven to be particularly suitable, while such effects are not obtained with other commercially available phosphonic acids, such as 1-hydroxyethane-1,1-diphosphonic acid or 2-phosphonobutane-1,2,4-tricarboxylic acid.
  • the mixtures of 3-amino-5-alkyl-1,2,4-triazoles and aminotrimethylenephosphonic acid described are used in amounts of 50 to 1,000 g / m 3 , preferably 200 to 500 g / m 3 .
  • aminoalkyl-1,2,4-triazoles which are used are prepared by methods known per se, for example by reacting fatty acid with aminoguanidine hydrogen carbonate. However, the preparation of these compounds is not the subject of this application.
  • the corrosion protection properties are determined in the manner described below.
  • test strips 80 x 15 x 1 mm are hung in a 1-1 test vessel containing 800 ml of test water and a defined amount of substance to be examined, and in it for 18 hours at room temperature and 80 revolutions per minute leave.
  • test water used as the corrosive medium was produced in accordance with DIN 51360/2 and adjusted to a pH of 1 using concentrated sulfuric acid.
  • the table below shows the inhibitors used, their concentration and the corrosion protection achieved in%.
  • the data given under order number 7 corresponds to the object of registration.

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

On utilise des 3-amino-5-alkyl-1,2,4 triazols en combinaison avec l'acide aminotriméthylènephosphonique comme inhibiteurs de corrosion de l'aluminium dans des systèmes aqueux à réaction acide.

Claims (4)

1. Utilisation d'une combinaison de 3-amino-5-alkyl-1,2,4-triazoles et d'acide aminotriméthylènephosphonique dans un rapport pondéral de 10 : 1 à 1 : 1 en tant qu'inhibiteur de corrosion pour l'aluminium dans des systèmes aqueux à réaction acide.
2. Utilisation d'une combinaison selon la revendication 1, caractérisée en ce que les 3-amino-5-alkyl-1,2,4-triazoles et l'acides aminotriméthylènephosphonique se trouvent dans un rapport en poids de 5 : 1.
3. Utilisation d'une combinaison selon les revendications 1 ou 2, caractérisée en ce qu'elle est appliquée en quantités de 50 à 1000 g/m3.
4. Utilisation d'une combinaison selon les revendications 1 à 3, caractérisée en ce qu'elle est appliquée en quantités de 200 à 500 g/m3.
EP84904122A 1983-11-14 1984-11-02 Inhibiteurs de corrosion pour l'aluminium Expired EP0162875B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84904122T ATE40839T1 (de) 1983-11-14 1984-11-02 Korrosionsinhibitoren fuer aluminium.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341152 1983-11-14
DE19833341152 DE3341152A1 (de) 1983-11-14 1983-11-14 Korrosionsinhibitoren fuer aluminium

Publications (2)

Publication Number Publication Date
EP0162875A1 EP0162875A1 (fr) 1985-12-04
EP0162875B1 true EP0162875B1 (fr) 1989-02-15

Family

ID=6214286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84904122A Expired EP0162875B1 (fr) 1983-11-14 1984-11-02 Inhibiteurs de corrosion pour l'aluminium

Country Status (5)

Country Link
US (1) US4647429A (fr)
EP (1) EP0162875B1 (fr)
JP (1) JPS61500447A (fr)
DE (2) DE3341152A1 (fr)
WO (1) WO1985002207A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904901A (en) * 1984-12-03 1990-02-27 Lumel, Inc. Electrolumescent panels
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
JP2010070790A (ja) * 2008-09-17 2010-04-02 Chiyoda Chemical Kk アルミニウム系金属の変色防止処理法
US9243333B2 (en) * 2012-09-27 2016-01-26 The United States Of America, As Represented By The Secretary Of The Navy Coated aluminum alloy pigments and corrosion-resistant coatings

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553101A (en) * 1968-05-17 1971-01-05 Exxon Research Engineering Co Prevention of corrosion using heterocyclic nitrogen compounds
GB1222133A (en) * 1968-05-25 1971-02-10 Geigy Uk Ltd Inhibition of corrosion of copper and its alloys using 3-amino-1:2:4-triazole
AT276897B (de) * 1968-08-01 1969-12-10 Henkel & Cie Gmbh Verhinderung der Korrosion von Aluminium und Aluminiumlegierungen in salzsauren Lösungen
DE1917686A1 (de) * 1969-04-05 1970-10-08 Benckiser Knapsack Gmbh Verfahren zur Behandlung von Wasserbaedern
US3935125A (en) * 1974-06-25 1976-01-27 Chemed Corporation Method and composition for inhibiting corrosion in aqueous systems
US4317744A (en) * 1979-04-25 1982-03-02 Drew Chemical Corporation Corrosion inhibitor
DE2934461A1 (de) * 1979-08-25 1981-03-26 Henkel KGaA, 40589 Düsseldorf Korrosionsinhibitoren fuer buntmetalle
US4409121A (en) * 1980-07-21 1983-10-11 Uop Inc. Corrosion inhibitors
GB2094776B (en) * 1981-03-11 1984-05-16 Dearborn Chemicals Ltd Prevention of corrosion in aqueous systems
US4452758A (en) * 1981-07-08 1984-06-05 Basf Wyandotte Corporation Compositions and process for inhibiting corrosion of aluminum

Also Published As

Publication number Publication date
DE3341152A1 (de) 1985-05-23
WO1985002207A1 (fr) 1985-05-23
JPS61500447A (ja) 1986-03-13
DE3476774D1 (en) 1989-03-23
US4647429A (en) 1987-03-03
EP0162875A1 (fr) 1985-12-04

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