EP0109548A1 - Corrosion inhibitors for aqueous solutions for the treatment of metals, and process for their preparation - Google Patents
Corrosion inhibitors for aqueous solutions for the treatment of metals, and process for their preparation Download PDFInfo
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- EP0109548A1 EP0109548A1 EP83110409A EP83110409A EP0109548A1 EP 0109548 A1 EP0109548 A1 EP 0109548A1 EP 83110409 A EP83110409 A EP 83110409A EP 83110409 A EP83110409 A EP 83110409A EP 0109548 A1 EP0109548 A1 EP 0109548A1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- 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 present invention relates to anticorrosive agents, particularly suitable for use as an anticorrosive agent for aqueous liquids for processing metals.
- the present invention also relates to a method for producing these anti-corrosion agents.
- the present invention relates to aqueous, no oil-containing liquids for working metals, especially metals particularly exposed to corrosion.
- aqueous mineral oil emulsions are used or cooling lubricants containing oils have been used to a large extent recently.
- cooling lubricants which contain no oils, are essentially combinations of salts of organic acids, for example para-tertiary-butylbenzoic acid, or of isononanoic acid with water-soluble polyadducts, those of ethylene oxide and of propylene oxide and / or butylene oxide with compounds are obtained which have active hydrogen atoms.
- organic acids for example para-tertiary-butylbenzoic acid, or of isononanoic acid with water-soluble polyadducts, those of ethylene oxide and of propylene oxide and / or butylene oxide with compounds are obtained which have active hydrogen atoms.
- the known disadvantage of using the aqueous mineral oil solutions as cooling liquids in metal processing is that there is a tendency to a degreasing effect, in particular due to thermal influences, due to the change in the pH range or due to a change in the electrolyte charge. As a result, a change in the composition and in the activity of the emulsion is brought about, whereby after a certain time the circulating emulsion is no longer capable, neither it required corrosion protection still to perform the necessary lubrication ..
- Another disadvantage of the mineral oil emulsion is that its milky appearance makes it difficult to observe the machining process.
- anti-corrosive agents used for these aqueous coolants containing no oils i.e. the above-mentioned salts of organic acids always have the considerable disadvantage that they offer insufficient resistance to hard water and inadequate protection against corrosion.
- the inadequate corrosion protection effect is also present in the case in which the above-mentioned salts of organic acids are precipitated out due to the action of the ions which contribute to the hardness of the water, with a disadvantageous shift in the mixture consisting of corrosion and lubricants, that is present in the cooling lubricant solutions. As a result, significant corrosion of both the tool and the workpiece can be caused during the operation.
- New compounds have now been found, particularly suitable as an anti-corrosion agent for aqueous liquids, for example for cleaning metals and in particular as an anti-corrosion agent for the production of non-oil-containing aqueous liquids which are suitable for working with metals.
- R 1 is a group of the formulas: and R 2 represents styryl.
- the reaction product is methylolated with formaldehyde and the compound of the formula (I) obtained in the form of the free acid is neutralized with a mono-, di- or triethanolamine or with isopropanolamine.
- the procedure is such that the polyamine and the acid are heated in a molar ratio of 1: 1 to a temperature of about 120 to 160 ° C. The reaction mixture is kept at this temperature until the reaction is complete and the corresponding water of reaction is distilled off. The presence of an inert organic solvent is possible, but not absolutely necessary, because the reaction is preferably carried out in the melt without solvent. The anhydride is then slowly added at this same temperature and the mixture is left to react for about two hours. Instead of the anhydride, the corresponding free acids can be used successfully in many cases.
- a mixture of 103 g (1 mol) of diethylenetriamine and 148 g (1 mol) of cinnamic acid is heated to a temperature of 145 ° C. and 17 ml of water are distilled off in the course. The temperature is then allowed to drop to 120 ° C. and 145 g of phthalic anhydride (1 mol) are added in small amounts over two hours so that the temperature is kept at 120 ° C.
- Example 1 179 g (1 mol) of tert-butylbenzoic acid and 103 g (1 mol) of diethylenetriamine are reacted as indicated in Example 1. 148 g (1 mol) of phthalic anhydride are then slowly added at 120 ° C. until everything has dissolved. Then 61 g (1 mol) of monoethanolamine and 180 g of water are added and the mixture is allowed to cool. A product with the same properties as in Example 1 is obtained.
- Example 1 158 g (1 mol) of isononanoic acid and 103 g (1 mol) of diethylenetriamine are reacted as indicated in Example 1. 148 g (1 mol) of phthalic anhydride are then slowly added at 120 ° C. until everything has dissolved. Then 105 g (1 mol) of diethanolamine and 180 g of water are added and the mixture is allowed to cool. A product having the same properties as in Example 1 is obtained.
- the new compounds of formula (I) are preferably used as corrosion inhibitors in aqueous liquids containing no oils and in the production of aqueous liquids containing no oils for the processing of metals.
- the above-mentioned aqueous liquids containing no oils are used primarily for metal-working processes without cutting and with cutting, in particular for the processing of iron or ferrous metals. Because of the use of the compounds according to the invention, all those disadvantages with which the mineral oil emulsions and also the abovementioned cooling lubricants containing no oils are afflicted are avoided.
- a major advantage of the cooling lubricants which do not contain oils and which are produced using the new compounds of the formula (I) according to the invention is that these new products have a greater corrosion protection effect than the lubricants of the known technology.
- the aqueous cooling lubricants which contain no oils and which are prepared by adding the new products of the formula (I) according to the invention can be used in a very wide range of applications.
- the lubricants according to the invention maintain high stability and high activity during their use.
- the compounds of formula (I) according to the invention exert such a high corrosion protection effect that an addition in weight between about 0.5% and 5.0% is sufficient to impart the required corrosion protection effect to cooling lubricants which do not contain oils, even in cases , where metal surfaces are particularly exposed to corrosion.
- the preferred proportion by weight when using the compounds of the formula (I) according to the invention in aqueous cooling lubricants containing no oils is between 1% and 2%.
Abstract
Die Erfindung betrifft neue Verbindungen, insbesondere geeignet als Korrosionsschutzmittel für waßrige Flüssigkeiten zur Reinigung von Metallen und, insbesondere, als Korrosionsschutzmittel für keine Ole enthaltende, wäßrige Flüssigkeiten, die sich zur Bearbeitung von, insbesondere der Korrosion ausgesetzten Metallen eignen. Die erfindungsgemäßen Verbindungen entsprechen der Formel <IMAGE> worin R Wasserstoff oder Hydroxymethyl, R¹ eine Gruppe der Formeln <IMAGE> R² Wasserstoff, -Alkyl, -Hydroxyalkyl, Phenyl, tert.-Butylphenyl oder Styryl, n 2 oder 3, m eine Zahl von 1 bis 4 und M Mono-, Di- oder Triethanolammonium oder iso-Propanolammonium bedeutet. Die Erfindung betrifft überdies ein Verfahren zu deren Herstellung.The invention relates to new compounds, particularly suitable as anti-corrosion agents for aqueous liquids for cleaning metals and, in particular, as anti-corrosion agents for non-oil-containing aqueous liquids which are suitable for processing metals, in particular those exposed to corrosion. The compounds of the invention correspond to the formula <IMAGE> in which R is hydrogen or hydroxymethyl, R¹ is a group of the formulas <IMAGE> R² is hydrogen, alkyl, hydroxyalkyl, phenyl, tert-butylphenyl or styryl, n is 2 or 3, m is a number of 1 to 4 and M means mono-, di- or triethanolammonium or iso-propanolammonium. The invention also relates to a method for the production thereof.
Description
Die vorliegende Erfindung betrifft Korrosionsschutzmittel, insbesondere geeignet für die Verwendung als Korrosionsschutzmittel für wäßrige Flüssigkeiten zur Bearbeitung von Metallen.The present invention relates to anticorrosive agents, particularly suitable for use as an anticorrosive agent for aqueous liquids for processing metals.
Die vorliegende Erfindung betrifft überdies ein Verfahren zur Herstellung dieser Korrosionsschutzmittel. Die vorliegende Erfindung betrifft schließlich wäßrige, keine öle enthaltende Flüssigkeiten zur Bearbeitung von Metallen, vor allem von der Korrosion besonders ausgesetzten Metallen. Bei spanabhebenden Verfahren zur Bearbeitung von Metallen, wie beispielsweise Bohren, Drehen, Fräsen, Räumen, u.a.m. und auch bei Verformungen von Metallen ohne Spanabhebung, werden oft wäßrige Mineralölemulsionen oder in letzter Zeit in größerem Ausmaß keine öle enthaltende Kühlschmiermittel verwendet. Bei diesen, keine öle enthaltenden Kühlschmiermitteln handelt es sich im wesentlichen um Kombinationen von Salzen der organischen Säuren, zum Beispiel der para-tertiär-Butylbenzoesäure, oder von Isononan-Säure mit wasserlöslichen Polyadduktstoffen , die von Ethylenoxid und von Propylenoxid und/oder Butylenoxid mit Verbindungen erhalten werden, die aktive Wasserstoffatome besitzen.The present invention also relates to a method for producing these anti-corrosion agents. Finally, the present invention relates to aqueous, no oil-containing liquids for working metals, especially metals particularly exposed to corrosion. For metal-cutting processes such as drilling, turning, milling, broaching, etc. and even in the case of deformations of metals without chip removal, aqueous mineral oil emulsions are used or cooling lubricants containing oils have been used to a large extent recently. These cooling lubricants, which contain no oils, are essentially combinations of salts of organic acids, for example para-tertiary-butylbenzoic acid, or of isononanoic acid with water-soluble polyadducts, those of ethylene oxide and of propylene oxide and / or butylene oxide with compounds are obtained which have active hydrogen atoms.
Bei Verwendung der wäßrigen Mineralöllösungen als Kühlflüssigkeiten bei der Metallverarbeitung liegt der bekannteNachteil darin, daß die Neigung zu einem Entfettungseffekt besteht, und zwar insbesondere aufgrund von thermischen Einflüssen, aufgrund der Änderung des pH-Bereiches oder aufgrund eines Wechsels der Elektrolytladung. Folglich wird eine Veränderung in der Zusammensetzung und in der Aktivität der Emulsion hervorgerufen, wodurch nach einer gewissen Zeit die sich im Umlauf befindliche Emulsion nicht mehr fähig ist, weder die erforderliche Korrosionsschutztätigkeit noch die notwendige Schmiertätigkeit auszuüben..Ein weiterer Nachteil der Mineralölemulsion besteht darin, daß ihr milchiges Aussehen die Beobachtung des Bearbeitungsablaufes erschwert. Einige dieser, den Mineralölemulsionen anhaftenden Nachteile weisen nicht die zur Zeit verwendeten, keine öle enthaltenden, wäßrigen Kühlschmiermittel auf.The known disadvantage of using the aqueous mineral oil solutions as cooling liquids in metal processing is that there is a tendency to a degreasing effect, in particular due to thermal influences, due to the change in the pH range or due to a change in the electrolyte charge. As a result, a change in the composition and in the activity of the emulsion is brought about, whereby after a certain time the circulating emulsion is no longer capable, neither it required corrosion protection still to perform the necessary lubrication .. Another disadvantage of the mineral oil emulsion is that its milky appearance makes it difficult to observe the machining process. Some of these disadvantages inherent in mineral oil emulsions do not have the currently used, oil-free, aqueous cooling lubricants.
Die für diese wäßrigen, keine öle enthaltenden Kühlschmiermittel verwendeten Korrosibrisschutzmittel, d.h. die oben genannten Salze der organischen Säuren, weisen dennoch immer den erheblichen Nachteil auf, daß sie einen ungenügenden Widerstand zum harten Wasser und einen mangelhaften Schutz gegen die Korrosion bieten.The anti-corrosive agents used for these aqueous coolants containing no oils, i.e. the above-mentioned salts of organic acids always have the considerable disadvantage that they offer insufficient resistance to hard water and inadequate protection against corrosion.
Die ungenügende Korrosionsschutzwirkung liegt auch im Falle vor, bei dem die oben genannten Salze der organischen Säuren durch Fällung ausgeschieden werden, und zwar zufolge der Einwirkung der zur Härte des Wassers beitragenden Jonen,wobei eine nachteilhafte Verschiebung der aus Korrosions- und Schmiermitteln bestehenden Mischung erfolgt, die in den Kühlschmiermittellösungen vorhanden ist. Folglich kann während des Arbeitsvorgangs eine erhebliche Korrosion sowohl des Werkzeugs als auch des Werkstücks verursacht werden.The inadequate corrosion protection effect is also present in the case in which the above-mentioned salts of organic acids are precipitated out due to the action of the ions which contribute to the hardness of the water, with a disadvantageous shift in the mixture consisting of corrosion and lubricants, that is present in the cooling lubricant solutions. As a result, significant corrosion of both the tool and the workpiece can be caused during the operation.
Nun wurden neue Verbindungen gefunden, insbesondere geeignet als Korrosionsschutzmittel für wäßrige Flüssigkeiten, zum Beispiel zur Reinigung von Metallen und insbesondere als Korrosionsschutzmittel zur Herstellung von keine öle enthaltenden, wäßrigen Flüssigkeiten, die sich für die Bearbeitung von Metallen eignen..New compounds have now been found, particularly suitable as an anti-corrosion agent for aqueous liquids, for example for cleaning metals and in particular as an anti-corrosion agent for the production of non-oil-containing aqueous liquids which are suitable for working with metals.
Die erfindungsgemäßen Korrosionsschutzmittel entsprechen der folgenden Formel (I)
- R2 Wasserstoff, C1-C12-Alkyl, C1-C5-HydroXyalkyl, Phenyl, tert.-Butylphenyl oder Styryl,
- n 2 oder 3, m eine Zahl zwischen 1 und 4 und M Mono-, Di- oder Triethanolammonium oder iso-Propanolammonium bedeutet.
- R 2 is hydrogen, C 1 -C 12 -alkyl, C 1 -C 5 -hydroXyalkyl, phenyl, tert-butylphenyl or styryl,
- n 2 or 3, m is a number between 1 and 4 and M is mono-, di- or triethanolammonium or iso-propanolammonium.
Bevorzugt sind die Verbindungen der obigen Formel (I), worin R1 eine Gruppe der Formeln:
Man erhält diese Verbindungen der Formel (I), indem man 1 Mol eines Polyamins der Formel
gegebenenfalls das Reaktionsprodukt mit Formaldehyd methyloliert, und die in Form der freien Säure anfallende Verbindung der Formel (I) mit einem Mono-, Di- oder Triethanolamin oder mit iso-Propanolamin neutralisiert. Im einzelnen geht man so vor, daß man das Polyamin und die Säure in einem molaren Verhältnis von 1:1 auf eine Temperatur von ca. 120 bis 160°C aufheizt. Man hält das Reaktionsgemisch bei dieser Temperatur bis die Reaktion beendet ist und destilliert dabei das entsprechende Reaktionswasser ab. Die Anwesenheit eines inerten organischen Lösemittels ist möglich, aber nicht zwingend erforderlich, denn bevorzugt wird die Reaktion ohne Lösemittel in der Schmelze durchgeführt. Anschließend gibt man bei dieser gleichen Temperatur langsam das Anhydrid zu und läßt ungefähr zwei Stunden nachreagieren. Anstelle des Anhydrids kann man in vielen Fällen mit Erfolg auch die entsprechenden freien Säuren einsetzen.optionally the reaction product is methylolated with formaldehyde and the compound of the formula (I) obtained in the form of the free acid is neutralized with a mono-, di- or triethanolamine or with isopropanolamine. In particular, the procedure is such that the polyamine and the acid are heated in a molar ratio of 1: 1 to a temperature of about 120 to 160 ° C. The reaction mixture is kept at this temperature until the reaction is complete and the corresponding water of reaction is distilled off. The presence of an inert organic solvent is possible, but not absolutely necessary, because the reaction is preferably carried out in the melt without solvent. The anhydride is then slowly added at this same temperature and the mixture is left to react for about two hours. Instead of the anhydride, the corresponding free acids can be used successfully in many cases.
Will man eine Verbindung der Formel (I) erhalten mit der Bedeutung von R = Hydroxymethyl, so kann man das Reaktionsprodukt vor der Neutralisation nach bekannten Methoden mit Formaldehyd oder Formaldehyd abgebenden Ver- bindungen umsetzen. Man kann diese Methylolierung vollständig oder nur teilweise durchführen, im letztgenannten Fall erhält man dann ein Gemisch der Verbindungen mit R = H und R = Hydroxymethyl.If one wishes to a compound of formula (I) having the meaning of R = hydroxymethyl, it may be the reaction product before neutralization by known methods with formaldehyde or formaldehyde-donating compounds V ER- implement. This methylolation can be carried out completely or only partially, in the latter case a mixture of the compounds with R = H and R = hydroxymethyl is then obtained.
Nach beendeter Reaktion gibt man vor dem Abkühlen noch Wasser zu, mindestens 3'Mol, bezogen auf ein Mol Polyamin und läßt abkühlen. Man erhält die Verbindung der Formel (I) in Form der freien Säure, die dann für den Ge-brauch durch Zugabe von Mono-, Die- oder. Triethanolamin oder iso-Propanolamin auf einen pH-Wert von 8 bis 10, vorzugsweise 9 eingestellt wird.After the reaction has ended, water is added before cooling, at least 3 mol, based on one mol of polyamine, and the mixture is allowed to cool. This gives the compound of formula (I) in the free acid form, which then for the G e-consumption by the addition of mono-, die or. Triethanolamine or iso-propanolamine is adjusted to a pH of 8 to 10, preferably 9.
Man erhitzt ein Gemisch aus 103 g (1 Mol) Diethylentriamin und 148 g (1 Mol) Zimtsäure auf eine Temperatur von 145°C und destilliert im Verlauf 17 ml Wasser ab. Dann läßt man die Temperatur auf 120°C absinken und gibt während zwei Stunden 145 g Phthalsäureanhydrid (1 Mol) in kleinen Mengen so zu, daß die Temperatur von 120°C gehalten wird.A mixture of 103 g (1 mol) of diethylenetriamine and 148 g (1 mol) of cinnamic acid is heated to a temperature of 145 ° C. and 17 ml of water are distilled off in the course. The temperature is then allowed to drop to 120 ° C. and 145 g of phthalic anhydride (1 mol) are added in small amounts over two hours so that the temperature is kept at 120 ° C.
Dann gibt man 60 g (1 Mol) Monoethanolamin und 150 g Wasser zu. Das so erhaltene Produkt stellt eine rote Flüssigkeit dar, die mit Wasser mischbar ist und sehr gute Kühlschmiermitteleigenschaften zeigt.Then 60 g (1 mol) of monoethanolamine and 150 g of water are added. The product thus obtained is a red liquid which is miscible with water and has very good cooling lubricant properties.
179 g (1 Mol) tert.-Butylbenzoesäure und 103 g (1 Mol) Diethylentriamin werden, wie in Beispiel 1 angegeben, umgesetzt. Bei 120°C gibt man dann langsam 148 g (1 Mol) Phthalsäureanhydrid zu bis sich alles gelöst hat. Dann gibt man noch 61 g (1 Mol) Monoethanolamin und 180 g Wasser zu und läßt abkühlen. Man erhält ein Produkt mit den gleichen Eigenschaften wie in Beispiel 1.179 g (1 mol) of tert-butylbenzoic acid and 103 g (1 mol) of diethylenetriamine are reacted as indicated in Example 1. 148 g (1 mol) of phthalic anhydride are then slowly added at 120 ° C. until everything has dissolved. Then 61 g (1 mol) of monoethanolamine and 180 g of water are added and the mixture is allowed to cool. A product with the same properties as in Example 1 is obtained.
158 g (1 Mol) Isononansäure und 103 g (1 Mol) Diethylentriamin werden, wie in Beispiel 1 angegebene umgesetzt. Bei 120°C gibt man dann langsam 148 g (1 Mol) Phthalsäureanhydrid zu bis sich alles gelöst hat. Dann gibt man noch 105 g (1 Mol) Diethanolamin und 180 g Wasser zu und läßt abkühlen..Man erhält ein Produkt mit den gleichen Eigenschaften wie in Beispiel 1.158 g (1 mol) of isononanoic acid and 103 g (1 mol) of diethylenetriamine are reacted as indicated in Example 1. 148 g (1 mol) of phthalic anhydride are then slowly added at 120 ° C. until everything has dissolved. Then 105 g (1 mol) of diethanolamine and 180 g of water are added and the mixture is allowed to cool. A product having the same properties as in Example 1 is obtained.
Die neuen Verbindungen der Formel (I) werden vorzugsweise als Korrosionsschutzmittel in wäßrigen, keine öle enthaltenden Flüssigkeiten und in der Herstellung von wäßrigen, keine öle enthaltenden Flüssigkeiten für die Bearbeitung von Metallen verwendet. Die genannten, wäßrigen, keine öle enthaltenden Flüssigkeiten werden vor allem für Metallbearbeitungsverfahren ohne Spanabhebung und mit Spanabhebung, insbesondere für die Bearbeitung von Eisen oder eisenhaltigen Metallen verwendet. Aufgrund der Verwendung der erfindungsgemäßen Verbindungen werden alle jene Nachteile vermieden, mit denen die Mineralölemulsionen und auch die obengenannten, keine öle enthaltenden Kühlschmiermittel behaftet sind. Ein wesentlicher Vorteil der keine öle enthaltenden Kühlschmiermittel, die mit Verwendung der neuen, erfindungsgemäßen Verbindungen der Formel (I) hergestellt werden, besteht in einer gegenüber den Schmiermitteln der bekannten Technik größeren Korrosionsschutzwirkung dieser neuen Produkte. Die wäßrigen, keine öle enthaltenden Kühlschmiermittel, die mit Zugabe der neuen erfindungsgemäßen Produkte der Formel (I) hergestellt werden, sind auf einem sehr weiten Anwendungsgebiet verwendbar. Die erfindungsgemäßen Schmiermittel bewahren eine hohe Stabilität und eine hohe Aktivität während ihrer Benutzung. Die erfindungsgemäßen Verbindungen der Formel (I) üben eine derart hohe Korrosionsschutzwirkung aus, daß eine Zugabe in Gewicht zwischen ca. 0,5 % und 5,0 % genügt, um Kühlschmiermitteln, die keine öle enthalten, die geforderte Korrosionsschutzwirkung auch in Fällen zu verleihen, bei denen Metalloberflächen der Korrosion besonders ausgesetzt sind. Der bevorzugte Gewichtsanteil bei der Verwendung der erfindungsgemäßen Verbindungen der Formel (I) in wäßrigen, keine öle enthaltenden Kühlschmiermitteln liegt zwischen 1 % und 2 %.The new compounds of formula (I) are preferably used as corrosion inhibitors in aqueous liquids containing no oils and in the production of aqueous liquids containing no oils for the processing of metals. The above-mentioned aqueous liquids containing no oils are used primarily for metal-working processes without cutting and with cutting, in particular for the processing of iron or ferrous metals. Because of the use of the compounds according to the invention, all those disadvantages with which the mineral oil emulsions and also the abovementioned cooling lubricants containing no oils are afflicted are avoided. A major advantage of the cooling lubricants which do not contain oils and which are produced using the new compounds of the formula (I) according to the invention is that these new products have a greater corrosion protection effect than the lubricants of the known technology. The aqueous cooling lubricants which contain no oils and which are prepared by adding the new products of the formula (I) according to the invention can be used in a very wide range of applications. The lubricants according to the invention maintain high stability and high activity during their use. The compounds of formula (I) according to the invention exert such a high corrosion protection effect that an addition in weight between about 0.5% and 5.0% is sufficient to impart the required corrosion protection effect to cooling lubricants which do not contain oils, even in cases , where metal surfaces are particularly exposed to corrosion. The preferred proportion by weight when using the compounds of the formula (I) according to the invention in aqueous cooling lubricants containing no oils is between 1% and 2%.
Die Vorteile der neuen Produkte gegenüber bekannten wasserlöslichen Korrosionsschutzmitteln wie Alkanolamin-Salzen der Isononansäure oder der para-tert.-Butylbenzoesäure sind aus den in der nachfolgenden Tabelle zusammengestellten Untersuchungsergebnissen ersichtlich. Bei diesen Untersuchungen wurden Löslichkeit, Schaumverhalten und Korrosionsschutzeigenschaften der angeführten Produkte miteinander verglichen. Für die Bestimmung der Löslichkeit wurde das Aussehen einer 3 %igen wäßrigen Lösung nach 24 stündigem Stehen herangezogen. Die Prüfung des Schaumverhaltens erfolgte nach DIN 53902 und die Korrosion wurde vergleichend geprüft unter Berücksichtigung molarer Verhältnisse:
- A) 22 Gew.-% Isononansäure 63 Gew.-% Triethanolamin 15 Gew.-% H2 0
- B) 25 Gew.-% p-tert-Butylbenzoesäure 60 Gew.-% Triethanolamin 15 Gew.-% H2 0
- C) 40 Gew.-% Produkt gemäß Beispiel 1 45 Gew.-% Triethanolamin 15 Gew.-% H2 0
- D) 35 Gew.-% Produkt gemäß Beispiel 2 50 Gew.-% Triethanolamin 15 Gew.-% H2 0
- E) 35 Gew.-% Produkt gemäß Beispiel 3 50 Gew.-% Triethanolamin 15 Gew.-% H2 0
- A) 22% by weight isononanoic acid 63% by weight triethanolamine 15% by weight H 2 0
- B) 25% by weight of p-tert-butylbenzoic acid 60% by weight of triethanolamine 15% by weight of H 2 O.
- C) 40% by weight of product according to Example 1 45% by weight of triethanolamine 15% by weight of H 2 O.
- D) 35% by weight of product according to Example 2 50% by weight of triethanolamine 15% by weight of H 2 O.
- E) 35% by weight of product according to Example 3 50% by weight of triethanolamine 15% by weight of H 2 O.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT23903/82A IT1191046B (en) | 1982-10-25 | 1982-10-25 | ANTI-CORROSION ADDITIVES FOR AQUEOUS LIQUIDS FOR METAL PROCESSING AND PROCEDURE FOR THEIR PREPARATION |
| IT2390382 | 1982-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0109548A1 true EP0109548A1 (en) | 1984-05-30 |
| EP0109548B1 EP0109548B1 (en) | 1988-07-13 |
Family
ID=11210763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83110409A Expired EP0109548B1 (en) | 1982-10-25 | 1983-10-19 | Corrosion inhibitors for aqueous solutions for the treatment of metals, and process for their preparation |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4533479A (en) |
| EP (1) | EP0109548B1 (en) |
| JP (1) | JPS59134761A (en) |
| BR (1) | BR8305869A (en) |
| DE (1) | DE3377351D1 (en) |
| IT (1) | IT1191046B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3436759B2 (en) * | 1993-07-09 | 2003-08-18 | 花王株式会社 | 2-hydroxypropanediamine derivative and detergent composition containing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168292A (en) * | 1977-10-26 | 1979-09-18 | Petrolite Corporation | Acylated hydroxyalkylaminoalkylamides and preparation thereof and uses thereof as corrosion inhibitors |
| DE3222996A1 (en) * | 1981-06-22 | 1983-03-03 | Basf Ag, 6700 Ludwigshafen | Alkanolamine salts of cyclic amido acids and their use as anticorrosion agents in aqueous systems |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2935474A (en) * | 1955-11-28 | 1960-05-03 | Visco Products Co | Process of inhibiting corrosion and corrosion inhibiting compositions |
| US3400075A (en) * | 1966-11-15 | 1968-09-03 | Union Carbide Corp | Lubricating compositions including a polymer which contains a salt or amide of a diimide |
| US3965027A (en) * | 1974-03-11 | 1976-06-22 | Calgon Corporation | Scale inhibition and corrosion inhibition |
| DE2558625A1 (en) * | 1975-12-24 | 1977-07-14 | Norte Klessmann & Co Kg | MACHINE TOOL, IN PARTICULAR DRILLING OR MILLING MACHINE |
| US4374741A (en) * | 1981-07-21 | 1983-02-22 | Cincinnati Milacron Inc. | Polyamide and functional fluid containing same |
-
1982
- 1982-10-25 IT IT23903/82A patent/IT1191046B/en active
-
1983
- 1983-10-19 DE DE8383110409T patent/DE3377351D1/en not_active Expired
- 1983-10-19 EP EP83110409A patent/EP0109548B1/en not_active Expired
- 1983-10-21 US US06/544,800 patent/US4533479A/en not_active Expired - Fee Related
- 1983-10-24 BR BR8305869A patent/BR8305869A/en unknown
- 1983-10-24 JP JP58197723A patent/JPS59134761A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168292A (en) * | 1977-10-26 | 1979-09-18 | Petrolite Corporation | Acylated hydroxyalkylaminoalkylamides and preparation thereof and uses thereof as corrosion inhibitors |
| DE3222996A1 (en) * | 1981-06-22 | 1983-03-03 | Basf Ag, 6700 Ludwigshafen | Alkanolamine salts of cyclic amido acids and their use as anticorrosion agents in aqueous systems |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0109548B1 (en) | 1988-07-13 |
| IT1191046B (en) | 1988-02-24 |
| US4533479A (en) | 1985-08-06 |
| DE3377351D1 (en) | 1988-08-18 |
| BR8305869A (en) | 1984-05-29 |
| JPS59134761A (en) | 1984-08-02 |
| IT8223903A0 (en) | 1982-10-25 |
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