DE4240945A1 - Korrosionsschutzmittel - Google Patents
KorrosionsschutzmittelInfo
- Publication number
- DE4240945A1 DE4240945A1 DE4240945A DE4240945A DE4240945A1 DE 4240945 A1 DE4240945 A1 DE 4240945A1 DE 4240945 A DE4240945 A DE 4240945A DE 4240945 A DE4240945 A DE 4240945A DE 4240945 A1 DE4240945 A1 DE 4240945A1
- Authority
- DE
- Germany
- Prior art keywords
- corrosion
- emulsifiers
- carbon atoms
- formula
- corrosion inhibitor
- 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.)
- Withdrawn
Links
Classifications
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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
- C23F11/16—Sulfur-containing compounds
- C23F11/163—Sulfonic acids
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- 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
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- 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
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- C23F11/124—Carboxylic acids
- C23F11/126—Aliphatic acids
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- 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
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Description
Die Erfindung betrifft Korrosionsschutzmittel enthaltend Di
alkylether, Korrosionsinhibitoren, Emulgatoren und gegebe
nenfalls Co-Emulgatoren sowie die Verwendung von Dialkyl
ethern als Ölkörper zur Herstellung von Korrosionsschutzmit
teln.
Werden metallische Werkstücke, wie beispielsweise Karosse
riebauteile, dem Einfluß atmosphärischer Bedingungen ausge
setzt, bewirkt das Zusammenspiel von Luftfeuchtigkeit und
Wärme das Auftreten von Korrosionserscheinungen, die bei
kurzfristiger Betrachtung vornehmlich aus ästhetischen Grün
den unerwünscht sind, langfristig jedoch die Werkstücke zer
stören können. Aus diesem Grunde besteht ein nachhaltiges
Interesse an Mitteln, mit deren Hilfe sich diese Korrosions
effekte, wenn nicht ausschalten, so doch zumindest merklich
verzögern lassen.
Auf dem Gebiet des Korrosionsschutzes existiert ein umfang
reiches Schrifttum. Moderne Korrosionsschutzmittel enthalten
in der Regel unpolare oder polare Öle, Emulgatoren, Korro
sionsinhibitoren und gegebenenfalls Wasser. Ihre Wirkung be
ruht auf der Adsorption von Inhibitormolekülen auf der Me
talloberfläche und der Bildung eines Schutzfilms aus Emul
sionsbestandteilen, der als Diffusionsbarriere für Luftsau
erstoff und Wasser wirkt. Andere handelsüblichen Systeme ba
sieren auf wasserfreien Ölkonzentraten, die Emulgatoren und
Korrosionsinhibitoren enthalten. Dies setzt jedoch voraus,
daß nur solche Wirkstoffe eingesetzt werden können, die über
eine ausreichende Öllöslichkeit verfügen [Oberfläche-Surface,
4, 8 (1989)].
Als Ölkomponenten werden heutzutage vorzugsweise Paraffin-
oder Mineralöle eingesetzt. Die Verwendung von Carbonsäuren
und gegebenenfalls substituierten Aminen sowie von Fettsäu
reamidseifen als Korrosionsinhibitoren wird beispielsweise in
der Deutschen Patentanmeldung DE-A1 21 60 100 sowie der Nie
derländischen Patentanmeldung NL-A1 74 13 481 beschrieben.
Aus der Deutschen Patentanmeldung DE-A1 39 33 137 sind des
weiteren Rostschutzemulsionen bekannt, die Mineralöl, Car
bonsäuren sowie nichtionische Tenside vom Typ der Fettalko
holpolyglycolether enthalten. Letztere besitzen jedoch keine
korrosionsinhibierenden Eigenschaften, sondern stellen die
Emulgatorkomponente dar. In Soap,Cosm.Cheia.Spec. Mai, 39
(1975) wird schließlich berichtet, daß Anlagerungsprodukte
von Schwefelsäure an ungesättigte Triglyceride, sogenannte
"Sulfoils", über korrosionsinhibierende Eigenschaften verfü
gen. Bei diesen Sulfoils, die zusammen mit Alkylbenzolsulfo
naten oder Alkylphenolpolyglycolethern eingesetzt werden,
handelt es sich um Triglyceride, deren Fettsäurereste mit
Sulfatgruppen substituiert sind.
Da Korrosionsschutzmittel früher oder später über Kläranlagen
in die Oberflächengewässer gelangen, müssen hohe Anforde
rungen an ihre ökologische Verträglichkeit gestellt werden.
Ein besonderes Augenmerk gilt dabei Mitteln, die als Ölkörper
mineralische und daher biologisch "harte" Trägeröle enthal
ten. Dezufolge besteht ein starkes Bedürfnis nach neuen, mög
lichst umweltverträglichen Korrosionsschutzmitteln, deren
Entwicklung als Aufgabe der Erfindung angesehen werden kann.
Korrosionsschutzmittel enthaltend
- a) Dialkylether der Formel (I) R1-O-R2 (I)in der R1 und R2 unabhängig voneinander für aliphatische, lineare oder verzweigte Kohlenwasserstoffreste mit 6 bis 22 Kohlenstoffatomen und 0, 1, 2 oder 3 Doppelbindungen steht,
- b) Korrosionsinhibitoren,
- c) Emulgatoren und
- d) gegebenenfalls Co-Emulgatoren.
Es wurde gefunden, daß Dialkylether eine ausgezeichnete Öl
basis für Korrosionsschutzmittel darstellen. Die Erfindung
schließt ferner die überraschende Erkenntnis ein, daß die
Dialkylether besonders rasch auf die Metalloberfläche auf
ziehen und so einen äußerst effektiven Korrosionsschutz be
wirken. Die leichte biologische Abbaubarkeit der als Ölkörper
fungierenden Dialkylether stellt zudem die gewünschte ver
besserte Umweltverträglichkeit der erfindungsgemäßen Mittel
sicher.
Als Ölkörper werden im Sinne der Erfindung Dialkylether ein
gesetzt. Hierbei handelt es sich um bekannte Stoffe, die nach
den einschlägigen Verfahren der präparativen organischen
Chemie erhalten werden können. Verfahren zu ihrer Herstel
lung, beispielsweise durch Kondensation von Fettalkoholen in
Gegenwart von p-Toluolsulfonsäure sind beispielsweise aus
Bull. Soc.Chim.France, 333 (1949), DE-A1 40 39 950 (Hoechst)
sowie DE-A1 41 03 489 (Henkel) bekannt. Hinsichtlich des
Stands der Technik sei ferner auf die EP-A1 0 170 076 (BASF)
verwiesen, in der die Verwendung von Dialkylethern als Träger
für Wärmeflüssigkeiten vorgeschlagen wird. Aus der US
4,844,534 (Esso) sind Schmierstoffe bekannt, die Dialkylether
enthalten. Gemäß der Lehre der DE-A1 41 16 406 (Henkel) kom
men Dialkylether auch als Bestandteile von schaumarmen Rei
nigungsmitteln in Betracht.
Aus anwendungstechnischer Sicht sind symmetrische Dialkyl
ether als Ölkörper für Korrosionsschutzmittel bevorzugt, die
6 bis 12 Kohlenstoffatomen in den Alkylresten aufweisen. Ein
besonders rasches Spreitvermögen weisen Dialkylether der
Formel (I) auf, in der R1 und R2 für Octyl- und/ oder 2-
Ethylhexylreste stehen. Die im Sinne der Erfindung besonders
bevorzugten Dialkylether sind somit Di-n-Octylether und Di-
2-ethylhexylether.
Als Korrosionsinhibitoren kommen beispielsweise Carbonsäuren
der Formel (II) in Betracht,
R3-COOH (II)
in der R3 für einen aliphatischen, linearen oder verzweigten
Kohlenwasserstoffrest mit 5 bis 23 Kohlenstoffatomen und 0
bzw. 1 bis 5 Doppelbindungen oder eine R4-Ph-COCH=CH-Gruppe,
R4 für einen linearen oder verzweigten Alkylrest mit 8 bis 18
Kohlenstoffatomen und Ph für eine Phenylgruppe steht.
Typische Beispiele sind die Fettsäuren Capronsäure, Capryl
säure, Caprinsäure, Laurinsäure, Myristinsäure, Palmitinsäu
re, Palmoleinsäure, Stearinsäure, Isostearinsäure, Ölsäure,
Elaidinsäure, Petroselinsäure, Linolsäure, Linolensäure,
Elaeostearinsäure, Arachinsäure, Gadoleinsäure, Arachidon
säure, Behensäure, Erucasäure und Clupanodonsäure sowie deren
technische Gemische, wie sie beispielsweise bei der Druck
spaltung von natürlichen Fetten und Ölen anfallen. Vorzugs
weise werden Carbonsäuren der Formel (II) eingesetzt, in der
R3 für Alkylreste mit 5 bis 17 Kohlenstoffatomen steht.
Beispiele für substituierte Carbonsäure sind in der Gruppe
der Alkylbenzoylacrylsäuren enthalten. Besonders bevorzugt
ist der Einsatz von 3-(p-Dodecylbenzoyl)acrylsäure.
Als weitere Gruppe von Korrosionsinhibitoren kommen anioni
sche Tenside vom Typ der Petrolsulfonate in Betracht. Hierbei
handelt es sich um Sulfoxidationsprodukte von Paraffinfrak
tionen mit durchschnittlich 6 bis 30, insbesondere 10 bis 20
Kohlenstoffatomen. Die Petrolsulfonate können auch als se
kundäre Alkansulfonate aufgefaßt werden, wobei als Gegenionen
Alkali- oder Erdalkalimetalle, Ammonium oder Alkylammonium in
Betracht kommen. Vorzugsweise werden die Petrolsulfonate in
Form ihrer Natrium- oder Calciumsalze eingesetzt.
Als weitere Gruppe von Korrosionsinhibitoren kommen Sulfonie
rungsprodukte ungesättigter Fettsäureglyceridester der Formel
(III), sogenannte "Sulfotriglyceride" oder "Sulfoils" in Be
tracht,
in der R5CO für einen ungesättigten Acylrest mit 16 bis 24
Kohlenstoffatomen und 1 bis 5 Doppelbindungen und R6CO und
R7CO unabhängig voneinander für Acylreste mit 6 bis 24 Koh
lenstoffatomen und 0 oder 1 bis 5 Doppelbindungen steht.
Sulfotriglyceride stellen bekannte Stoffe dar, die beispiels
weise durch Anlagerung von Schwefeltrioxid oder Chlorsulfon
säure an ungesättigte Triglyceride, insbesondere Rapsöl oder
Sonnenblumenöl erhalten werden können. In diesem Zusammenhang
sei auf die Offenlegungsschriften DE-A1 39 36 001 und DE-A1
41 18 955 der Anmelderin verwiesen, in denen die Herstellung
und die korrosionsinhibierenden und selbstemulgierenden Ei
genschaften der Sulfotriglyceride beschrieben sind. Im Sinne
der erfindungsgemäßen Mittel wird vorzugsweise sulfoniertes
Raps- öl in Form des Natrium-, Calcium-, Ammonium- oder Al
kylammoniumsalzes eingesetzt.
Als Emulgatoren kommen Anlagerungsprodukte von Ethylen- und/
oder Propylenoxid an Verbindungen mit aciden Wasserstoffato
men oder Fettsäureester in Betracht. Hierunter sind bei
spielsweise Alkoxylierungsprodukte von Fettalkoholen, Alkyl
phenolen, Fettsäuren, Fettaminen und Fettsäuremethylestern zu
verstehen, die nach den bekannten Verfahren des Stands der
Technik erhalten werden können.
Typische Beispiele sind Anlagerungsprodukte von durchschnitt
lich 1 bis 20, vorzugsweise 2 bis 10 Mol Ethylenoxid und 0
oder 1 bis 5 Mol Propylenoxid an Fettalkohole mit 6 bis 22
Kohlenstoffatomen, Alkylphenole mit 4 bis 12 Kohlenstoffato
men im Alkylrest sowie Fettsäuren, Fettamine und Fettsäure
methylester mit jeweils 6 bis 22 Kohlenstoffatomen im Fett
rest. Besonders bevorzugt sind Anlagerungsprodukte von 2 bis
10 Mol Ethylenoxid an Lauryl- oder C12/14-Kokosfettalkohol
(konventionelle oder eingeengte Homologenverteilung), an
Octylphenol, Laurin- oder C12/14-Kokosfettsäure, Laurylamin
und/oder Kokosfettsäuremethylester.
Als Co-Emulgatoren, die fakultative Bestandteile der erfin
dungsgemäßen Mittel sind und sich alleine nicht zur Herstel
lung einer Emulsion eignen, kommen Fettalkohole der Formel
(IV) in Betracht,
R8-OH (IV)
in der R8 für Alkyl- und/oder Alkenylreste mit 6 bis 22 Koh
lenstoffatome steht.
Typische Beispiele sind Capronalkohol, Caprylalkohol, Caprin
alkohol, Laurylalkohol, Myristylalkohol, Cetylalkohol, Palm
oleylalkohol, Stearylalkohol, Isostearylalkohol, Oleylalko
hol, Elaidylalkohol, Petroselinylalkohol, Arachylalkohol,
Gadoleylalkohol, Behenylalkohol und Erucylalkohol sowie deren
technische Gemische, wie sie beispielsweise bei der Hoch
druckhydrierung von natürlichen Fettsäuremethylesterfraktio
nen oder Aldehyden aus der Roelen′schen Oxosynthese anfallen.
Vorzugsweise erfolgt die Auswahl der Co-Emulgatoren in An
lehnung an die C-Kettenlänge der Emulgatoren.
Als weitere Co-Emulgatoren kommen ferner auch verzweigte pri
märe Alkohole, sogenannte Guerbetalkohole in Betracht, die
durch basenkatalysierte Kondenstion von Fettalkoholen erhält
lich sind und 12 bis 16 Kohlenstoffatome aufweisen können.
Aus anwendungstechnischer Sicht haben sich Korrosionsschutz
mittel als besonders wirkungsvoll erwiesen, die die genannten
Komponenten in den folgenden Mengen enthalten; in Klammern
angegeben sind die bevorzugten Bereiche:
10 bis 96 (45 bis 90) Gew.-% Dialkylether,
2 bis 25 (4 bis 15) Gew.-% Korrosionsinhibitoren,
2 bis 15 (4 bis 10) Gew.-% Emulgatoren,
0 bis 15 (0 bis 5) Gew.-% Co-Emulgatoren und
0 bis 86 (10 bis 83) Gew.-% Wasser.
2 bis 25 (4 bis 15) Gew.-% Korrosionsinhibitoren,
2 bis 15 (4 bis 10) Gew.-% Emulgatoren,
0 bis 15 (0 bis 5) Gew.-% Co-Emulgatoren und
0 bis 86 (10 bis 83) Gew.-% Wasser.
Die erfindungsgemäßen Mittel können als wasserfreie Konzen
trate zur Anwendung gelangen. Es ist jedoch ebenfalls mög
lich, die Konzentrate vor Ort mit Wasser auf Konzentrationen
von 1 bis 50, vorzugsweise 2 bis 40 und insbesondere 2 bis 20
Gew.-% - bezogen auf die Mittel - zu verdünnen oder derartige
Emulsionen bzw. Dispersionen unmittelbar in den Handel zu
bringen. Die wäßrigen Mittel können dabei neutral oder auch
alkalisch eingestellt sein.
Wäßrige Mittel mit einem günstigen Fließverhalten und einer
hohen Lagerstabilität können nach der sogenannten "Phasenin
versionstemperatur-Methode (PIT)" hergestellt werden, die
beispielsweise in der DE-A1 39 33 137 beschrieben ist. Je
nach Herstellungsverfahren werden dabei milchig-trübe
grobdisperse Emulsionen oder optisch nahezu transparente Mi
kroemulsionen erhalten.
Neben den genannten Inhaltsstoffen können die erfindungsge
mäßen Mittel noch weitere in diesem Zusammenhang übliche In
haltsstoffe aufweisen. Typische Beispiele ohne Anspruch auf
Vollständigkeit sind dabei anionische Tenside, Partialgly
ceride, Borverbindungen, insbesondere Borsäureester, Fett
säureamide, Phosphorsäureester, Dimerfettsäuren, aliphatische
Dicarbonsäuren, Aminodicarbonsäuren sowie Benzoesäure und
deren Salze, Thiophosphorsäureester, Dialkyldithiophosphate,
Benzotriazole und Polyisobutenbernsteinsäurederivate.
Die erfindungsgemäßen Mittel verhindern bzw. verzögern die
Bildung von Rost auf Metalloberflächen und sind gut biolo
gisch abbaubar. Ein besonderer Vorteil gegenüber dem Stand
der Technik besteht in der bislang nicht bekannten Wahl von
biologisch leichtabbaubaren Dialkylethern als Ölbasis für
diese Mittel.
Ein weiterer Gegenstand der Erfindung betrifft daher die Ver
wendung von Dialkylethern der Formel (I) als Ölkörper bei der
Herstellung von Korrosionsschutzmitteln.
Die erfindungsgemäßen wäßrigen Mittel eignen sich nicht nur
zum temporären Korrosionsschutz, sie können auch als Reini
gungsmittel eingesetzt werden, um beispielsweise Metall
oberflächen gleichzeitig zu entfetten und gegen Korrosion zu
schützen.
Die folgenden Beispiele sollen den Gegenstand der Erfindung
näher erläutern, ohne ihn darauf einzuschränken.
Ölkörper
Di-n-Octylether
Di-n-Octylether
Inhibitoren
PSNa (Petronate CR) C16/18-Petrolsulfonat-Natriumsalz, 62 gew.-%ige Lösung in Mineralöl, Fa.Witco;
PSCa (Ca-Petronate HMW) C16/18-Petrolsulfonat-Calciumsalz, 45 gew.-%ige Lösung in Mineralöl, Fa.Witco;
SRNa, Sulforüböl-Natriumsalz, 45 gew.-%ige wäßrige Lösung;
SRCa, Sulforüböl-Calciumsalz, 55 gew.-%ige wäßrige Lösung;
SROa, Sulforüböl-Octylaminsalz, wasserfrei
SRSa, Sulforüböl-Stearylaminsalz, wasserfrei
PSNa (Petronate CR) C16/18-Petrolsulfonat-Natriumsalz, 62 gew.-%ige Lösung in Mineralöl, Fa.Witco;
PSCa (Ca-Petronate HMW) C16/18-Petrolsulfonat-Calciumsalz, 45 gew.-%ige Lösung in Mineralöl, Fa.Witco;
SRNa, Sulforüböl-Natriumsalz, 45 gew.-%ige wäßrige Lösung;
SRCa, Sulforüböl-Calciumsalz, 55 gew.-%ige wäßrige Lösung;
SROa, Sulforüböl-Octylaminsalz, wasserfrei
SRSa, Sulforüböl-Stearylaminsalz, wasserfrei
Emulgator
Laurylalkohol-10EO
Laurylalkohol-10EO
Co-Emulator
Laurylalkohol.
Laurylalkohol.
Die Rezepturen der Beispiel 1 bis 8 enthielten jeweils
80 bis 87 Gew.-% Dialkylether;
8 bis 15 Gew.-% Korrosionsinhibitor;
4 Gew.-% Emulgator
1 Gew.-% Co-Emulgator
8 bis 15 Gew.-% Korrosionsinhibitor;
4 Gew.-% Emulgator
1 Gew.-% Co-Emulgator
und wurden entweder wasserfrei (100 gew.-%ig) oder in Form
einer 20 gew.-%igen wäßrigen Dispersion eingesetzt.
Beim Kondensationswasser-Klimatest nutzt man die Kondensation
der Luftfeuchte auf Probenoberflächen, deren Temperaturen
durch Abstrahlung auf die Wände der Prüfkammer kleiner als
die der gesättigten Prüfraumluft sind, zur Beurteilung von
Korrosionserscheinungen. Der Test wurde gemäß DIN 50 017-KTw
unter folgenden Bedingungen durchgeführt:
Temperatur | |
max. 40°C | |
Länge des Testzyklus | 8 h bei 40°C (Tür geschlossen) |
16 h Raumtemperatur (Tür geöffnet) | |
Probenmaterial | Karosseriestahlbleche ST 1405, |
Abmessungen 10 × 5 cm |
Die Prüfbleche wurden zunächst mit Aceton entfettet und an
schließend in die Testrezepturen getaucht. Nach einer Ab
tropfzeit von 24 h wurden die Bleche in einer Klimakammer
über 1 bis 25 Testzyklen bewittert. Nach jedem Testzyklus
wurde der Korrosionsgrad (KG) nach folgendem Schema optisch
bewertet:
KG = 0 : keine Korrosion
KG = 1 : bis 1% Korrosion
KG = 2 : bis 5% Korrosion
KG = 3 : bis 25% Korrosion
KG = 4 : < 25% Korrosion.
KG = 1 : bis 1% Korrosion
KG = 2 : bis 5% Korrosion
KG = 3 : bis 25% Korrosion
KG = 4 : < 25% Korrosion.
Die Ergebnisse der Versuche in der Klimakammer sind in Tab. 1
zusammengefaßt. In der Spalte "Korrosionsgrad nach Testzyk
len" ist für die erfindungsgemäßen Mittel (Beispiele 1 bis 8)
sowie für die Vergleichsversuche (V1, V2) die Zahl der Test
zyklen angegeben, nach der sich der entsprechende Korrosi
onsgrad einstellte.
V1 wurde ohne Korrosionsschutzmittel durchgeführt; für V2
wurde in der Rezeptur aus Beispiel 1 Di-n-octylether gegen
Pioneer-Weißöl ausgetauscht.
Claims (9)
1. Korrosionsschutzmittel enthaltend
- a) Dialkylether der Formel (I) R1-O-R2 (I)in der R1 und R2 unabhängig voneinander für aliphati sche, lineare oder verzweigte Kohlenwasserstoffreste mit 6 bis 22 Kohlenstoffatomen und 0, 1, 2 oder 3 Doppelbindungen steht,
- b) Korrosionsinhibitoren,
- c) Emulgatoren und
- d) gegebenenfalls Co-Emulgatoren.
2. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Ölkörper Dialkylether der Formel
(I) enthalten, in der R1 und R2 für Octyl- und/oder 2-
Ethylhexylreste stehen.
3. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Korrosionsinhibitoren Carbonsäuren
der Formel (II) enthalten,
R3-COOH (II)in der R3 für einen aliphatischen, linearen oder ver
zweigten Kohlenwasserstoffrest mit 5 bis 23 Kohlenstoff
atomen und 0 bzw. 1 bis 5 Doppelbindungen oder eine
R4-Ph-COCH=CH-Gruppe, R4 für einen linearen oder ver
zweigten Alkylrest mit 8 bis 18 Kohlenstoffatomen und Ph
für eine Phenylgruppe steht.
4. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Korrosionsinhibitoren Petrolsulfo
nate enthalten.
5. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Korrosionsinhibitoren Sulfierungs
produkte ungesättigter Fettsäureglyceridester der Formel
(III) enthalten,
in der R5CO für einen ungesättigten Acylrest mit 16 bis
24 Kohlenstoffatomen und 1 bis 5 Doppelbindungen und R6CO
und R7CO unabhängig voneinander für Acylreste mit 6 bis
24 Kohlenstoffatomen und 0 oder 1 bis 5 Doppelbindungen
steht.
6. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Emulgatoren Anlagerungsprodukte von
Ethylen- und/oder Propylenoxid an Verbindungen mit aciden
Wasserstoffatomen oder Fettsäureester enthalten.
7. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie als Co-Emulgatoren Fettalkohole der
Formel (IV) enthalten,
R8-OH (IV)in der R8 für Alkyl- und/oder Alkenylreste mit 6 bis 22
Kohlenstoffatome steht.
8. Korrosionsschutzmittel nach Anspruch 1, dadurch gekenn
zeichnet, daß sie
10 bis 96 Gew.-% Dialkylether,
2 bis 25 Gew.-% Korrosionsinhibitoren,
2 bis 15 Gew.-% Emulgatoren,
0 bis 15 Gew.-% Co-Emulgatoren und
0 bis 86 Gew.-% Wasserenthalten.
2 bis 25 Gew.-% Korrosionsinhibitoren,
2 bis 15 Gew.-% Emulgatoren,
0 bis 15 Gew.-% Co-Emulgatoren und
0 bis 86 Gew.-% Wasserenthalten.
9. Verwendung von Dialkylethern der Formel (I) als Ölkörper
bei der Herstellung von Korrosionsschutzmitteln.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4240945A DE4240945A1 (de) | 1992-12-07 | 1992-12-07 | Korrosionsschutzmittel |
EP93923564A EP0667891A1 (de) | 1992-11-06 | 1993-10-28 | Dialkylether in metalloberflächen-behandlungsmitteln |
PCT/EP1993/002990 WO1994011469A1 (de) | 1992-11-06 | 1993-10-28 | Dialkylether in metalloberflächen-behandlungsmitteln |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4240945A DE4240945A1 (de) | 1992-12-07 | 1992-12-07 | Korrosionsschutzmittel |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4240945A1 true DE4240945A1 (de) | 1994-06-09 |
Family
ID=6474454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4240945A Withdrawn DE4240945A1 (de) | 1992-11-06 | 1992-12-07 | Korrosionsschutzmittel |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4240945A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002714A1 (de) * | 1993-07-16 | 1995-01-26 | Henkel Kommanditgesellschaft Auf Aktien | Mittel zum reinigen und passivieren von metalloberflächen |
WO1995002713A1 (de) * | 1993-07-16 | 1995-01-26 | Henkel Kommanditgesellschaft Auf Aktien | Verfahren zur herstellung von o/w-emulsionen zum reinigen und passivieren von metalloberflächen |
-
1992
- 1992-12-07 DE DE4240945A patent/DE4240945A1/de not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002714A1 (de) * | 1993-07-16 | 1995-01-26 | Henkel Kommanditgesellschaft Auf Aktien | Mittel zum reinigen und passivieren von metalloberflächen |
WO1995002713A1 (de) * | 1993-07-16 | 1995-01-26 | Henkel Kommanditgesellschaft Auf Aktien | Verfahren zur herstellung von o/w-emulsionen zum reinigen und passivieren von metalloberflächen |
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