EP0162875B1 - Inhibiteurs de corrosion pour l'aluminium - Google Patents
Inhibiteurs de corrosion pour l'aluminium Download PDFInfo
- 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
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
- C23F11/04—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
Claims (4)
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)
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)
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 |
-
1983
- 1983-11-14 DE DE19833341152 patent/DE3341152A1/de not_active Withdrawn
-
1984
- 1984-11-02 WO PCT/EP1984/000347 patent/WO1985002207A1/fr active IP Right Grant
- 1984-11-02 DE DE8484904122T patent/DE3476774D1/de not_active Expired
- 1984-11-02 JP JP59504352A patent/JPS61500447A/ja active Pending
- 1984-11-02 US US06/757,839 patent/US4647429A/en not_active Expired - Fee Related
- 1984-11-02 EP EP84904122A patent/EP0162875B1/fr not_active Expired
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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