EP0002780B1 - Utilisation d'inhibiteurs de corrosion dans des systèmes aqueux - Google Patents

Utilisation d'inhibiteurs de corrosion dans des systèmes aqueux Download PDF

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Publication number
EP0002780B1
EP0002780B1 EP78101757A EP78101757A EP0002780B1 EP 0002780 B1 EP0002780 B1 EP 0002780B1 EP 78101757 A EP78101757 A EP 78101757A EP 78101757 A EP78101757 A EP 78101757A EP 0002780 B1 EP0002780 B1 EP 0002780B1
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EP
European Patent Office
Prior art keywords
carbon atoms
water
aqueous systems
chips
corrosion
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Expired
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EP78101757A
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German (de)
English (en)
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EP0002780A1 (fr
Inventor
Knut Dr. Oppenlaender
Wolfgang Dr. Kindscher
Elmar Getto
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BASF SE
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BASF SE
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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
    • C23F11/145—Amides; N-substituted amides

Definitions

  • the invention relates to the use of alkanolamine salts of maleic acid as low-foaming corrosion inhibitors for metals in aqueous systems.
  • DE-AS 11 49 843 discloses amine salts of amic acids which are obtained as lubricants by reacting succinic or maleic anhydride with primary alkylamines which contain 4 to 30 C atoms in the alkyl chain and then neutralizing with such amines. and fuel additives with rust protection.
  • the agents mentioned by way of example in this literature reference are oil-soluble and in most cases not water-soluble. Insofar as they are water-soluble, it has been found that they either develop much too strong foam in the above-mentioned systems (see also the mention of the addition of foam absorbers in this patent specification) or they lose a large part of their anticorrosive action when the foam action is low.
  • water solubility and water hardness insensitivity are influenced by the chain length.
  • maleic acid isooctyl, isononyl, isodecyl, isoundecyl and / or isododecylamic acids which have been neutralized with mono-, di- or tri-C 2 - to C 3 -alkanolamines or their mixtures.
  • n-Cg and lower such as nC 7 - and C ;
  • Isoalkylamines as starting materials greatly weaken the anticorrosive effect of the end products and that starting with a longest chain of isoalkylamines of more than 8 carbon atoms, end products with excessive foaming action are formed as starting products.
  • isoalkylamines with more than 7 C atoms have a low sensitivity to water hardness as the starting product. Above about 12 carbon atoms, the water hardness sensitivity of the end products is increased very much, and the water solubility is also severely restricted.
  • Starting compounds for the preparation of the compounds to be used according to the invention are maleic anhydride and primary isoalkylamines having 8 to 12 carbon atoms and having a longest chain of 6 to 8 carbon atoms, such as isooctylamines, isononylamines, isodecylamines, isoundecylamines and isododecylamines, of which the isooctylamines and isononylamines are preferred.
  • These amines can also be used in a mixture with corresponding proportions of n-alkylamine. Such mixtures originate e.g. of oxo synthesis.
  • the reaction of the maleic anhydride with the amine or amine mixture in question can be carried out by known methods.
  • the amic acids obtained are then neutralized with one of the alkanolamines as defined or with mixtures thereof in a manner known per se.
  • An excess of alkanolamine is preferably used.
  • Special alkanolamines for the purposes of the invention are, for example, di- or triethanolamine or di- and triisopropanolamine or mixtures thereof.
  • the maleic acids formed are mixed with the corresponding alkanolamine in molar ratios of 1: 1 to 2: 8 and stirred until a clear liquid results.
  • a crystalline substance is formed with a melting point of 69 ° C and an acid number of 252 (theoretically: 247).
  • this maleic acid 30 parts by weight of this maleic acid are then mixed with 70 parts by weight of triethanolamine with a portion of diethanolamine and stirred without additional heating until a clear liquid is obtained.
  • a crystalline substance is formed with a melting point of 62 ° C and an acid number of 235 (theoretically: 233).
  • a liquid with an acid number of 191 (theoretically: 191) is formed.
  • the corrosion protection effect was determined by the so-called “Herberts” corrosion test and the “gray cast iron” filter test.
  • the foam damping was determined by the "IG impact method” based on DIN 53 902.
  • the corrosion protection effect is in 1% aqueous solution at active substance and at a water hardness of 10 ° d.H. on the Herberts test system introduced in the metalworking sector.
  • This consists of a standardized gray cast iron plate and also standardized steel chips of 5 mm length, which are supplied by Alfred Herberts, Coventry / England.
  • the square plate with the dimensions 100x100x5 mm is carefully sanded using a belt grinder with 120 corundum sanding belt, washed with white spirit and ethanol and dried with a clean cloth.
  • the steel chips supplied with the test system which are obtained under standardized conditions from 0.40% carbon steel, are placed on the prepared cast steel plate in four piles using a suitable metal or plastic spoon with the capacity of a normal teaspoon so that they separate from each other and have the same distance from the edges of the plate.
  • the chips should lie in a single layer in the narrowest possible position.
  • the solutions or emulsions to be tested for their corrosion behavior are applied to the piles of chips by means of a measuring pipette in such a quantity that the liquid reaching the cast steel plate is held together by the chips. After standing for 24 hours in an atmosphere of 70% relative humidity, the chips are shaken off the plate by tilting. It the clearly visible outline of the dried aqueous medium remains. Depending on the corrosiveness of the liquid, rust marks of smaller or larger dimensions have formed at the contact points of the chips, which can also have grown together to form a closed rust layer. The assessment can be made by visually estimating the percentage of rust in the area.
  • a further corrosion test consists of the gray cast iron filter sample.
  • a petri dish with an inner diameter of approx. 10 cm is used with a suitable lid dish.
  • a black band round filter is placed in the Petri dish.
  • a suitable spoon is used to distribute 5 to 10 g of coarse cast iron GG-20 shavings onto the filter in such a way that a uniform heap is formed in the middle, which is around 1.5 cm away from the edge.
  • the chips have a length of approx. 5 to 8 mm and must be obtained from clean gray cast iron GG-20 material without the use of drilling oil or other cooling lubricants. All fine components must be screened off.
  • the impact method was used based on DIN 53 902.
  • the simple test procedure was sufficient, in which the stamp with the perforated plate by hand 30 ma! in 30 s evenly up and down and then carefully pulled out (IG impact method).
  • the foam volume is read on the graduated foam cylinder after 1, 5 and 10 min in ml. Information about temperature, concentration and water hardness are also important.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Claims (3)

1. Utilisation de sels de mono-, di- ou tri- alcanol (en C2 ou C3)-amines d'amides de l'acide maléique de la formule
Figure imgb0005
dans laquelle le symbole R représente un groupe iso-alcoyle avec un nombre total d'atomes de carbone de 8 à 12 et dont la chaîne la plus longue est en C6 à C8, en tant qu' inhibiteurs de la corrosion peu moussants dans des systèmes aqueux.
2. Utilisation de substances suivant la revendication 1, pour lesquelles le symbole R représente un groupe iso-octyle ou iso-nonyle.
3. Utilization de substances suivant la revendication 1 en mélange avec jusqu'à 90% du poids du mélange de substances de la même formule, pour lesquelles le symbole R représente un groupe n-alcoyle en C8 à C12.
EP78101757A 1977-12-24 1978-12-19 Utilisation d'inhibiteurs de corrosion dans des systèmes aqueux Expired EP0002780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772758123 DE2758123A1 (de) 1977-12-24 1977-12-24 Korrosionsschutzmittel in waessrigen systemen
DE2758123 1977-12-24

Publications (2)

Publication Number Publication Date
EP0002780A1 EP0002780A1 (fr) 1979-07-11
EP0002780B1 true EP0002780B1 (fr) 1980-11-26

Family

ID=6027361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101757A Expired EP0002780B1 (fr) 1977-12-24 1978-12-19 Utilisation d'inhibiteurs de corrosion dans des systèmes aqueux

Country Status (3)

Country Link
US (1) US4207285A (fr)
EP (1) EP0002780B1 (fr)
DE (2) DE2758123A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427400A1 (fr) * 1978-06-02 1979-12-28 Snam Progetti Agent anti-rouille pour systemes aqueux et compositions lubrifiantes empechant la rouille
EP0015442A1 (fr) * 1979-03-03 1980-09-17 BASF Aktiengesellschaft Inhibiteurs de corrosion peu moussants et à propriétés microbiocides, contenant comme composé actif un produit de réaction d'acide borique et d'une alcanolamine
EP0026878A1 (fr) * 1979-10-04 1981-04-15 Hoechst Aktiengesellschaft Inhibiteurs de corrosion stables dans l'eau dure
WO1982000665A1 (fr) * 1980-08-27 1982-03-04 Geke J Procede et produit pour passiver les surfaces en fer et en acier
FR2500473A1 (fr) * 1981-02-20 1982-08-27 Cincinnati Milacron Inc Composition aqueuse de fluide fonctionnel inhibant la corrosion, a base d'un sel d'amide termine par un groupe acide carboxylique, et ses applications
EP0106234A1 (fr) * 1982-10-07 1984-04-25 BASF Aktiengesellschaft Utilisation de sels d'amines d'amide de l'acide maléique comme inhibiteur de corrosion de C02 et H2S dans des émulsions eau dans l'huile
EP0237959A1 (fr) * 1986-03-20 1987-09-23 Henkel Kommanditgesellschaft auf Aktien Mélanges de sels d'ammonium d'acides gras et de polyacides gras respectivement leurs sels alcalins ou d'ammonium solubles dans l'eau, un procédé pour leur préparation et leur utilisation comme inhibiteurs de corrosion dans des systèmes aqueux
US4705666A (en) * 1983-11-12 1987-11-10 Henkel Kommanditgesellschaft Auf Aktien Alkanolamin salts of alkenyl succinic acid dialkyl semiamide corrosion inhibitors

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2943963A1 (de) * 1979-10-31 1981-05-14 Basf Ag, 6700 Ludwigshafen Verwendung von alkanolaminsalzen von alkenylbernsteinsaeuren als korrosionsinhibitoren in waessrigen systemen
DE3047304A1 (de) * 1980-12-16 1982-07-29 Basf Ag, 6700 Ludwigshafen Verwendung von polyhydroxy-polyalkylen-polyamin-salzen von maleinamidsaeuren als korrosionsschutzmittel in wasser-in-oel-emulsionen
DE3222996A1 (de) * 1981-06-22 1983-03-03 Basf Ag, 6700 Ludwigshafen Alkanolaminsalze cyclischer amidsaeuren und ihre verwendung als korrosionsschutzmittel in waessrigen systemen
US4473491A (en) * 1981-06-22 1984-09-25 Basf Aktiengesellschaft Alkanolamine salts of cyclic amide acids and their use as metal corrosion inhibitors in aqueous systems
DE3416120A1 (de) * 1984-04-30 1985-10-31 Henkel KGaA, 4000 Düsseldorf Benzoylalanine und ihre verwendung als korrosionsinhibitoren fuer waessrige systeme
DE3521116A1 (de) * 1985-06-13 1986-12-18 Henkel KGaA, 4000 Düsseldorf Spezielle benzoylalanine und ihre verwendung als korrosionsinhibitoren fuer waessrige systeme
DE3540246A1 (de) * 1985-11-13 1987-05-14 Henkel Kgaa Verwendung von alkoxyhydroxyfettsaeuren als korrosionsinhibitoren in oelen und oelhaltigen emulsionen

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA569600A (fr) * 1959-01-27 Universal Oil Products Company Compositions contre la corrosion et application s'y rapportant
FR834205A (fr) * 1937-03-01 1938-11-16 Ig Farbenindustrie Ag Procédé pour préparer des agents mouillants
US2699427A (en) * 1952-10-02 1955-01-11 Gulf Oil Corp Mineral oil compositions containing amidic acids or salts thereof
US2742498A (en) * 1952-10-02 1956-04-17 Gulf Oil Corp Amidic acids
GB828701A (en) * 1955-04-21 1960-02-24 Monsanto Chemicals Rust-inhibiting compositions and lubricants containing the same
US2944969A (en) * 1957-02-06 1960-07-12 Petrolite Corp Prevention of rust and corrosion
BE568954A (fr) * 1958-01-07
US3121057A (en) * 1960-12-01 1964-02-11 Socony Mobil Oil Co Inc Succinamic metal salts in turbine oil
US3251776A (en) * 1964-04-21 1966-05-17 Socony Mobil Oil Co Inc Rust inhibitors for aqueous solutions
DE1518611B1 (de) * 1965-11-17 1972-05-25 Basf Ag Verfahren zur Herstellung von Salzen carboxylgruppenhaltiger acylierter Polyamine
DE1521710C3 (de) * 1966-07-14 1974-07-18 Chemische Werke Huels Ag, 4370 Marl Verwendung von Korrosionsinhibitoren zum Schutz von solchen Metalloberflächen, die nicht mit flüssigen Brennstoffen in Berührung stehen
US3654346A (en) * 1968-06-03 1972-04-04 Petrolite Corp Poly-ester-amide-acids
US3762873A (en) * 1971-02-16 1973-10-02 Petrolite Corp Corrosion inhibiting method using substituted succinimides
US3773479A (en) * 1971-12-06 1973-11-20 Texaco Inc Motor fuel containing a substituted asparagine
US3954873A (en) * 1972-06-16 1976-05-04 Robert M. Gipson Amino alcohols
US4053426A (en) * 1975-03-17 1977-10-11 Mobil Oil Corporation Lubricant compositions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427400A1 (fr) * 1978-06-02 1979-12-28 Snam Progetti Agent anti-rouille pour systemes aqueux et compositions lubrifiantes empechant la rouille
EP0015442A1 (fr) * 1979-03-03 1980-09-17 BASF Aktiengesellschaft Inhibiteurs de corrosion peu moussants et à propriétés microbiocides, contenant comme composé actif un produit de réaction d'acide borique et d'une alcanolamine
EP0026878A1 (fr) * 1979-10-04 1981-04-15 Hoechst Aktiengesellschaft Inhibiteurs de corrosion stables dans l'eau dure
WO1982000665A1 (fr) * 1980-08-27 1982-03-04 Geke J Procede et produit pour passiver les surfaces en fer et en acier
FR2489372A1 (fr) * 1980-08-27 1982-03-05 Henkel Kgaa Procede et produit pour passiver des surfaces de fer et d'acier
FR2500473A1 (fr) * 1981-02-20 1982-08-27 Cincinnati Milacron Inc Composition aqueuse de fluide fonctionnel inhibant la corrosion, a base d'un sel d'amide termine par un groupe acide carboxylique, et ses applications
EP0106234A1 (fr) * 1982-10-07 1984-04-25 BASF Aktiengesellschaft Utilisation de sels d'amines d'amide de l'acide maléique comme inhibiteur de corrosion de C02 et H2S dans des émulsions eau dans l'huile
US4705666A (en) * 1983-11-12 1987-11-10 Henkel Kommanditgesellschaft Auf Aktien Alkanolamin salts of alkenyl succinic acid dialkyl semiamide corrosion inhibitors
EP0237959A1 (fr) * 1986-03-20 1987-09-23 Henkel Kommanditgesellschaft auf Aktien Mélanges de sels d'ammonium d'acides gras et de polyacides gras respectivement leurs sels alcalins ou d'ammonium solubles dans l'eau, un procédé pour leur préparation et leur utilisation comme inhibiteurs de corrosion dans des systèmes aqueux

Also Published As

Publication number Publication date
DE2758123A1 (de) 1979-07-05
DE2860352D1 (en) 1981-02-12
US4207285A (en) 1980-06-10
EP0002780A1 (fr) 1979-07-11

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