EP0022999A1 - Corrosion inhibiting composition for aluminium and aluminium alloys - Google Patents

Corrosion inhibiting composition for aluminium and aluminium alloys Download PDF

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Publication number
EP0022999A1
EP0022999A1 EP80104040A EP80104040A EP0022999A1 EP 0022999 A1 EP0022999 A1 EP 0022999A1 EP 80104040 A EP80104040 A EP 80104040A EP 80104040 A EP80104040 A EP 80104040A EP 0022999 A1 EP0022999 A1 EP 0022999A1
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weight
component
aluminium
corrosion protection
mol
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EP80104040A
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French (fr)
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EP0022999B1 (en
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Rainer Dr. Helwerth
Horst Lorke
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Hoechst AG
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Hoechst AG
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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

Definitions

  • pre-corrosion Due to the high reactivity of freshly manufactured aluminum surfaces, the extrusion of aluminum components (window frames, cladding, etc.) the problem of so-called "pre-corrosion”. This refers to surface damage that damages aspects, which occurs due to hand sweat, water or moisture, packaging material and aggressive industrial atmosphere before anodizing and often necessitates costly manual post-treatment of the finished parts. Corrosion protection agents for preventing this damage are simultaneously called for stability up to 180 ° C (annealing heat) and unproblematic behavior in the final anodizing process. The products previously in use only incompletely meet the requirements.
  • Component A of the anticorrosive agent according to the invention essentially consists of compounds of the formula in which R is a saturated aliphatic or cyclic hydrocarbon radical or an alkylaryl group with a total of 12-24, preferably 13-16 carbon atoms, R 1 is hydrogen or CH3, R 2 is hydrogen, C 1 -C 3 -alkyl or -hydroxyalkyl, X is an integer of 0 to 9, Y represents an equivalent of an alkaline earth metal or zinc cation.
  • Component C contains the amine salt of an organic acid, consisting for example of caprylamine, octylamine, dibutylamine or isodecylamine and caproic acid, caprylic acid and 2-ethylhexane carboxylic acid or isononanoic acid.
  • an organic acid consisting for example of caprylamine, octylamine, dibutylamine or isodecylamine and caproic acid, caprylic acid and 2-ethylhexane carboxylic acid or isononanoic acid.
  • the equivalence ratio of amine to acid can be between 70:30 to 30:70.
  • Component D is, for example, the reaction product of nonyl or tributylphenol with 2-4 moles of ethylene oxide.
  • a solvent is to be understood that aliphatic of a linear or branched C 4 -C S alcohol.
  • These corrosion protection agents are applied by simply spraying them onto the metal parts to be treated.
  • the respective amounts for components A to E are selected within the limits specified in each case so that the total amount for the anticorrosive agent according to the invention is 100%.
  • the advantageous anticorrosive properties of the anticorrosive agents according to the invention can be seen in the test tests described below.
  • the tests essentially consist in spraying dry, freshly pickled aluminum sheets with the respective corrosion protection agents and observing them for corrosion under the conditions of the Kesternich test ( DIN 50017) for a test period of up to 4 weeks.
  • the tendency to corrode was also tested on aluminum sheets which, after being sprayed with the anticorrosive agent, were subjected to a tempering anneal of 180 ° C. for 4 hours.
  • the anti-corrosion agents 1 and 2 are according to the invention and the agents 3-4 have been used for this purpose.

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  • 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

Korrosionsschutzmittel für Aluminium und dessen Legierungen, bestehend aus: A) 15 - 50 Gew.% eines Umsetzungsproduktes erhalten durch Umsetzung von Sulfochlorierungsprodukten aliphatischer, alkylaromatischer oder cycloaliphatischer Kohlenwasserstoffe mit Ammoniak oder einem Alkyl- oder Hydroxyalkylamin, anschließende Umsetzung mit einer Halogencarbonsäure und Überführung in das Erdalkalimetall- oder Zinksalz, B) 40 - 90 Gew.% eines paraffinischen Kohlenwasserstoffs C) 1 - 4 Gew% des Salzes aus einem Alkylamin und einer Carbonsäure, D) 1 - 4 Gew.% eines Alkylphenol-oxethylats und E) 1 - 2 Gew.% eines C4-C8-Alkanols.Corrosion protection agent for aluminum and its alloys, consisting of: A) 15-50% by weight of a reaction product obtained by reaction of sulfochlorination products of aliphatic, alkylaromatic or cycloaliphatic hydrocarbons with ammonia or an alkyl or hydroxyalkylamine, subsequent reaction with a halocarboxylic acid and conversion into the alkaline earth metal - or zinc salt, B) 40-90% by weight of a paraffinic hydrocarbon C) 1-4% by weight of the salt from an alkylamine and a carboxylic acid, D) 1-4% by weight of an alkylphenol oxyethylate and E) 1-2% % of a C4-C8 alkanol.

Description

Durch die hohe Reaktivität frisch hergestellter Aluminium-Oberflächen tritt bei der Profilherstellung, d.h. dem Strangpressen von Al-Bauteilen (Fensterrahmen, Fassadenverkleidungen u.ä.) das Problem der sogenannten "Vorkorrosion" auf. Hierunter versteht man aspektschädigende Oberflächenschäden, die durch Handschweiß, Wasser bzw. Feuchtigkeit, Verpackungsmaterial und aggressive Industrieatmosphäre noch vor dem Eloxieren auftreten und häufig eine kostenaufwendige manuelle Nachbehandlung der Fertigteile erforderlich machen. An Korrosionsschutzmittel für die Verhinderung dieser Schäden wird gleichzeitig die Forderung nach einer Stabilität bis 180°C (Anlass-Glühe) und unproblematisches Verhalten in abschließendem Eloxal-Prozeß gestellt. Die bisher im Gebrauch befindlichen Produkte erfüllen die Forderungen nur unvollkommen.Due to the high reactivity of freshly manufactured aluminum surfaces, the extrusion of aluminum components (window frames, cladding, etc.) the problem of so-called "pre-corrosion". This refers to surface damage that damages aspects, which occurs due to hand sweat, water or moisture, packaging material and aggressive industrial atmosphere before anodizing and often necessitates costly manual post-treatment of the finished parts. Corrosion protection agents for preventing this damage are simultaneously called for stability up to 180 ° C (annealing heat) and unproblematic behavior in the final anodizing process. The products previously in use only incompletely meet the requirements.

Gegenstand der Erfindung ist ein verbessertes Korrosionsschutzmittel für Aluminium und dessen Legierungen, bestehend aus:

  • A) 15 - 50, vorzugsweise 40 - 50 Gew.-% eines Umsetzungsproduktes erhalten durch Umsetzung von Sulfochlorierungsprodukten aliphatischer, alkylaromatischer oder cycloaliphatischer Kohlenwasserstoffe mit 12 -24 C-Atomen mit Ammoniak oder einem C,-C3-Alkyl- oder Hydroxyalkylamin, anschließende Umsetzung mit einer C2-C11-Halogencarbonsäure und Überführung in das Erd- alkalimetall- oder Zinksalz,
  • B) 40 - 90, vorzugsweise 40 - 50 Gew.-% eines paraffinischen Kohlenwasserstoffs mit einer Viskosität von 3 bis 5° E/20°C, dessen Gehalt an C13-C16-Paraffin 50 - 60 %, an Naphthenen 50 - 40 % und an Aromaten 0 - 1 % beträgt,
  • C) 1 - 4, vorzugsweise 1 - 2 Gew.-% des Salzes aus einem Ca-C10-Alkylamin und einer C8-C10-Carbonsäure,
  • D) 1 - 4, vorzugsweise 1 - 2 Gew.-% eines Oxethylats aus 1 Mol C8-C12-Alkylphenol und 2 - 10 Mol Ethylenoxid und
  • E) 1- - 2 % eines C4-C8 aliphatischen Alkohols.
The invention relates to an improved corrosion protection agent for aluminum and its alloys, consisting of:
  • A ) 15-50, preferably 40-50% by weight of a reaction product obtained by reacting sulfochlorination products of aliphatic, alkylaromatic or cycloaliphatic hydrocarbons having 12-24 carbon atoms with ammonia or a C, -C3-alkyl or hydroxyalkylamine, followed by reaction with a C 2 -C 11 halocarboxylic acid and conversion into the e rd- alkali metal or zinc salt,
  • B) 40-90, preferably 40-50% by weight of a paraffinic hydrocarbon with a viscosity of 3 to 5 ° E / 20 ° C, the content of C 13 -C 16 paraffin 50-60% and naphthenes 50- 40% and 0-1% of aromatics,
  • C ) 1-4, preferably 1-2% by weight of the salt of a C a -C 10 alkylamine and a C 8 -C 10 carboxylic acid,
  • D) 1-4, preferably 1-2% by weight of an oxyethylate from 1 mol of C 8 -C 12 alkylphenol and 2-10 mol of ethylene oxide and
  • E) 1--2% of a C 4 -C 8 aliphatic alcohol.

Die Komponente A des erfindungsgemäßen Korrosionsschutzmittels besteht im wesentlichen aus Verbindungen der Formel

Figure imgb0001
in der R einen gesättigten aliphatischen oder cyclischen Kohlenwasserstoffrest oder eine Alkylarylgruppe mit insgesamt 12-24, vorzugsweise 13-16 Kohlenstoffatomen, R1 Wasserstoff oder CH3, R2 Wasserstoff, C1-C3-Alkyl oder -Hydroxialkyl, X eine ganze Zahl von 0 bis 9, Y ein Äquivalent eines Erdalkalimetall oder Zinkkations bedeutet.Component A of the anticorrosive agent according to the invention essentially consists of compounds of the formula
Figure imgb0001
 in which R is a saturated aliphatic or cyclic hydrocarbon radical or an alkylaryl group with a total of 12-24, preferably 13-16 carbon atoms, R 1 is hydrogen or CH3, R 2 is hydrogen, C 1 -C 3 -alkyl or -hydroxyalkyl, X is an integer of 0 to 9, Y represents an equivalent of an alkaline earth metal or zinc cation.

Die Herstellung dieser Umsetzungsprodukte, ausgehend von den Sulfochlorierungsprodukten gesättigter nichtaromatischer Kohlenwasserstoffe, kann z.B. nach dem Verfahren der deutschen Patentschrift 767 071 erfolgen.The preparation of these reaction products, starting from the sulfochlorination products of saturated non-aromatic hydrocarbons, can e.g. according to the procedure of German Patent 767 071.

Als Komponente B kommt ein paraffinischer Kohlenwasserstoff mit etwa folgender Zusammensetzung in Betracht:

  • 50 - 60 % C13-C16 Aliphaten Dichte : ca. 0,8/15°C max. 1 % Aromaten Brechungsindex : ca. 1,4/20°C 50 - 40 % Naphthenen Flammpunkt : ca. 100°C (Abel-Pensky)
A paraffinic hydrocarbon with approximately the following composition can be considered as component B:
  • 50 - 60% C 13 -C 16 aliphatic density: approx. 0.8 / 15 ° C max. 1% aromatics refractive index: approx. 1.4 / 20 ° C 50 - 40% naphthenes Flash point: approx. 100 ° C (Abel-Pensky)

Die Komponente C enthält das Aminsalz einer organischen Säure, bestehend beispielsweise aus Caprylamin, Octylamin, Dibutylamin oder Isodecylamin und Capronsäure, Caprylsäure und 2-Ethylhexancarbonsäure oder Isononansäure.Component C contains the amine salt of an organic acid, consisting for example of caprylamine, octylamine, dibutylamine or isodecylamine and caproic acid, caprylic acid and 2-ethylhexane carboxylic acid or isononanoic acid.

Das Äquivalenzverhältnis von Amin zu Säure kann zwischen 70 : 30 bis 30 : 70 liegen.The equivalence ratio of amine to acid can be between 70:30 to 30:70.

Die Komponente D ist beispielsweise das Umsetzungsprodukt von Nonyl- oder Tributylphenol mit 2 - 4 Molen Ethylenoxid.Component D is, for example, the reaction product of nonyl or tributylphenol with 2-4 moles of ethylene oxide.

Unter der Komponente E ist ein Lösungsmittel zu verstehen, das aus einem linearen oder verzweigten C4-CS-aliphatischen Alkohol besteht.Under the component E, a solvent is to be understood that aliphatic of a linear or branched C 4 -C S alcohol.

Die Applikation dieser Korrosionsschutzmittel erfolgt durch einfaches Aufsprühen auf die zu behandelnden Metallteile. Die jeweiligen Mengen für die Komponenten A bis E werden innerhalb der jeweils angegebenen Grenzen so gewählt, daß die Gesamtmenge für das erfindungsgemäße Korrosionsschutzmittel 100 % ergibt.These corrosion protection agents are applied by simply spraying them onto the metal parts to be treated. The respective amounts for components A to E are selected within the limits specified in each case so that the total amount for the anticorrosive agent according to the invention is 100%.

Das vorteilhafte Korrosionsschutzvermögen der erfindungsgemäßen Korrosionsschutzmittel zeigt sich bei den nachfolgend beschriebenen Testversuchen. Die Versuche bestehen im wesentlichen darin, daß trockene, frisch gebeizte Aluminiumbleche mit den jeweiligen Korrosionsschutzmitteln eingesprüht und unter den Bedingungen des Kesternich-Testes (DIN 50017) während einer Prüfdauer von bis zu 4 Wochen auf Korrosion beobachtet wurden. Die Korrosionsneigung wurde daneben auch an solchen Aluminiumblechen getestet, die nach dem Einsprühen mit dem Korrosionsschutzmittel noch während 4 Std. einer Anlaß-Glühe von 180°C unterzogen wurden.The advantageous anticorrosive properties of the anticorrosive agents according to the invention can be seen in the test tests described below. The tests essentially consist in spraying dry, freshly pickled aluminum sheets with the respective corrosion protection agents and observing them for corrosion under the conditions of the Kesternich test ( DIN 50017) for a test period of up to 4 weeks. The tendency to corrode was also tested on aluminum sheets which, after being sprayed with the anticorrosive agent, were subjected to a tempering anneal of 180 ° C. for 4 hours.

Bei der visuellen Beurteilung der Prüfbleche erfolgt die Benotung mit den Werten 0 - 4 nach dem folgenden Schema:

  • 0 = kein Rost
  • 1 = Spur von Rost
  • 2 = etwas rostig
  • 3 = deutlich rostig
  • 4 = stark rostig
When visually assessing the test panels, the scores 0 - 4 are based on the following scheme:
  • 0 = no rust
  • 1 = trace of rust
  • 2 = somewhat rusty
  • 3 = clearly rusty
  • 4 = very rusty

Die bei den Prüfungen ermittelten Ergebnisse für die Korrosionsschutzmittel 1 bis 5 sind in der nachfolgenden Tabelle zusammengestellt.The results obtained in the tests for the K orrosionsschutzmittel 1 to 5 are summarized in the table below.

Korrosionsschutzmittel:

  • 1. 15 % einer Komponente A erhalten durch Umsetzung eines C13/C16-Alkylsulfochlorids mit Ammoniak, anschließende Umsetzung mit Essigsäure und Überführung in das Bariumsalz, 80 % eines paraffinischen Kohlenwasserstoffs mit etwa folgender Zusammensetzung:
    • 50 - 60 % C13-C16-Aliphaten Dichte : ca. 0,8/15°C
    • max. 1 % Aromaten Brechungsindex : ca. 1,4/2G°C
    • 50 - 40 % Naphthenen Flammpunkt : ca. 100°C (Abel-Pensky)
    • 2 % Caprylaminoctoat,
    • 2 % Nonylphenol mit 2 Mol EO und
    • 1 % Isobutanol
  • 2. 15 % der Komponente A wie unter 1. beschrieben jedoch in der Form des Calciumsalzes,
    80% des gleichen paraffinischen Kohlenwasserstoffs wie unter 1. beschrieben,
    2 % Caprylaminoctoat,
    2 % Nonylphenol mit 2 Mol EO und
    1 % Isobutanol
  • 3. 4 % Fettsäureester aus C16/C18-Fettsäure Jodzahl 27 und Fettalkohol und niederen sowie höheren mehrwertigen Alkoholen
    4 % Fettsäureglycerid
    2 % Alkanolaminsalz einer Sulfocarbonsäure
    90 % Paraffinöl
  • 4. Paraffinischer Kohlenwasserstoff wie in den Korrosionsschutzmitteln 1. und 2. als Komponente B verwendet,
  • 5. Mineralöl
    Spindelöl 3 °E/20 °C
Corrosion protection agent:
  • 1. 15% of component A are obtained by reacting a C13 / C16 alkyl sulfochloride with ammonia, then reacting with acetic acid and converting it to the barium salt, 80% of a paraffinic hydrocarbon with the following composition:
    • 50 - 6 0% C13-C16 aliphatic density: approx. 0.8 / 15 ° C
    • Max. 1% aromatics refractive index: approx. 1.4 / 2G ° C
    • 50 - 40% naphthenes Flash point: approx. 100 ° C (Abel-Pensky)
    • 2% caprylic amino octoate,
    • 2% nonylphenol with 2 mol EO and
    • 1% isobutanol
  • 2. 15% of component A as described under 1. but in the form of the calcium salt,
    80% of the same paraffinic hydrocarbon as described under 1.,
    2% caprylic amino octoate,
    2% nonylphenol with 2 mol EO and
    1% isobutanol
  • 3. 4% fatty acid esters from C 16 / C 18 fatty acid iodine number 27 and fatty alcohol and lower and higher polyhydric alcohols
    4% fatty acid glyceride
    2% alkanolamine salt of a sulfocarboxylic acid
    90% paraffin oil
  • 4. paraffinic hydrocarbon as used in corrosion protection agents 1 and 2 as component B,
  • 5. Mineral oil
    Spindle oil 3 ° E / 20 ° C

Die Korrosionsschutzmittel 1 und 2 sind erfindungsgemäß und die Mittel 3 - 4 sind bisher zu diesem Zweck benutzt worden.The anti-corrosion agents 1 and 2 are according to the invention and the agents 3-4 have been used for this purpose.

Korrosionsschutzversuche nach Kesternich (DIN 50017)

Figure imgb0002
Die Untersuchungen wurden auf Aluminiumblechen mit einem Gehalt von 0,5; 1,5 bzw. 3 % Magnesium durchgeführt. Bei allen drei Legierungsarten ergaben sich die gleichen Werte mit den jeweils untersuchten Korrosionsschutzmitteln 1 - 5. Die jeweils unter b) angegebenen Werte beziehen sich auf Proben, die nach dem Einsprühen mit dem Korrosionsschutzmittel 4 Stunden bei 180°C geglüht wurden. Bei den Proben a) fehlt diese Hitzebehandlung. K orrosionsschutzversuche Kesternich (DIN 50017)
Figure imgb0002
 The tests were carried out on aluminum sheets with a content of 0.5; 1.5 or 3% magnesium performed. The same values were obtained for all three types of alloy with the respective corrosion protection agents 1 - 5. The values given under b) relate to samples that were annealed for 4 hours at 180 ° C after spraying with the corrosion protection agent. This heat treatment is absent in samples a).

Claims (2)

1. Korrosionsschutzmittel für Aluminium und dessen Legierungen, bestehend aus: A) 15-50 Gew.-% eines Umsetzungsproduktes erhalten durch Umsetzung von Sulfochlorierungsprodukten aliphatischen, alkylaromatischen oder cycloaliphatischen Kohlenwasserstoffen mit 12-24 C-Atomen mit Ammoniak oder einem C1-C3-Alkyl- oder Hydroxyalkylamin, anschließende Umsetzung mit einer C2-C11-Halogencarbonsäure und überführung in das Erdalkalimetall-oder Zinksalz, B) 40-90 Gew.-% eines paraffinischen Kohlenwasserstoffs mit einer Viskosität von 3 bis 5°C/20°C dessen Gehalt an C13-c16-Paraffin 50-60 %, an Naphthenen 50-40 % und an Aromaten 0-1 % beträgt, C) 1-4 Gew.-% des Salzes aus einem C8-C10-Alkylamin und einer C8-C10-Carbonsäure, D) 1-4 Gew.-% eines Oxethylats aus 1 Mol C8-C12-Alkylphenol und 2-10 Mol Ethylenoxid und E) 1-2 % eines C4-Ca-aliphatischen Alkohols. 1. Corrosion protection agent for aluminum and its alloys, consisting of: A) 15-50% by weight of a reaction product obtained by reacting sulfochlorination products with aliphatic, alkylaromatic or cycloaliphatic hydrocarbons having 12-24 carbon atoms with ammonia or a C 1 -C 3 alkyl- or hydroxyalkylamine, followed by reaction with a C 2 -C 11 halocarboxylic acid and conversion into the alkaline earth metal or zinc salt, B) 40-90 wt .-% of a paraffinic hydrocarbon with a viscosity of 3 to 5 ° C / 20 ° C, the content of C13-C16 paraffin 50-60%, naphthenes 50-40% and aromatics 0-1 % is C) 1-4% by weight of the salt from a C 8 -C 10 alkylamine and a C 8 -C 10 carboxylic acid, D ) 1-4 wt .-% of an oxyethylate from 1 mol of C 8 -C 12 alkylphenol and 2-10 mol of ethylene oxide and E) 1-2% of a C 4 -C a aliphatic alcohol. 2. Korrosionsschutzmittel nach Anspruch 1 bestehend aus 40 - 50 Gew.-% der Komponente B, 1 - 2 Gew.-% der Komponente C, 1 - 2 Gew.-% der Komponente D und 1 - 2 Gew.-% der Komponente E.2. Corrosion protection agent according to claim 1 consisting of 40-50% by weight of component B, 1-2% by weight of component C, 1-2% by weight of component D and 1-2% by weight of the component E.
EP80104040A 1979-07-20 1980-07-12 Corrosion inhibiting composition for aluminium and aluminium alloys Expired EP0022999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2929413 1979-07-20
DE19792929413 DE2929413A1 (en) 1979-07-20 1979-07-20 CORROSION PROTECTIVE AGENT FOR ALUMINUM AND ALUMINUM ALLOYS

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EP0022999A1 true EP0022999A1 (en) 1981-01-28
EP0022999B1 EP0022999B1 (en) 1983-03-23

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EP (1) EP0022999B1 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404113A (en) * 1980-09-19 1983-09-13 Hoechst Aktiengesellschaft Cooling liquid with corrosion-inhibiting and cavitation-inhibiting additives

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Publication number Priority date Publication date Assignee Title
US4452157A (en) * 1982-04-19 1984-06-05 The Singer Company Basting stitch mechanism
US4970026A (en) * 1988-09-21 1990-11-13 Drew Chemical Corporation Corrosion inhibitor

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FR1592566A (en) * 1967-10-14 1970-05-19
CH497365A (en) * 1967-09-28 1970-10-15 Sumitomo Chemical Co Process for the production of new ultraviolet absorbers
DD117492A1 (en) * 1973-09-19 1976-01-12
DE2614234A1 (en) * 1976-04-02 1977-10-20 Metallgesellschaft Ag CORROSION PROTECTION AGENT FOR METAL SURFACES
FR2403396A1 (en) * 1977-09-19 1979-04-13 Hoechst Ag WATER-MISCIBLE ANTI-CORROSIVE AGENTS CONTAINING AMINO-ALKANOIC ACIDS SULPHONYL WITH NITROGEN
DD137124A1 (en) * 1978-03-01 1979-08-15 Friedrich Andreas SELF-WAISTING CORROSION PROTECTION

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US3692675A (en) * 1970-11-04 1972-09-19 Dow Chemical Co Inhibitor to corrosive attack and method of use
US4192769A (en) * 1978-05-12 1980-03-11 The Lubrizol Corporation Rust inhibitor additive compositions, method of making, and aqueous fluids containing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497365A (en) * 1967-09-28 1970-10-15 Sumitomo Chemical Co Process for the production of new ultraviolet absorbers
FR1592566A (en) * 1967-10-14 1970-05-19
DD117492A1 (en) * 1973-09-19 1976-01-12
DE2614234A1 (en) * 1976-04-02 1977-10-20 Metallgesellschaft Ag CORROSION PROTECTION AGENT FOR METAL SURFACES
FR2403396A1 (en) * 1977-09-19 1979-04-13 Hoechst Ag WATER-MISCIBLE ANTI-CORROSIVE AGENTS CONTAINING AMINO-ALKANOIC ACIDS SULPHONYL WITH NITROGEN
DD137124A1 (en) * 1978-03-01 1979-08-15 Friedrich Andreas SELF-WAISTING CORROSION PROTECTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404113A (en) * 1980-09-19 1983-09-13 Hoechst Aktiengesellschaft Cooling liquid with corrosion-inhibiting and cavitation-inhibiting additives

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DE2929413A1 (en) 1981-02-05
JPS5616679A (en) 1981-02-17
DE3062433D1 (en) 1983-04-28
US4323476A (en) 1982-04-06
EP0022999B1 (en) 1983-03-23

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