EP0048216A1 - Oil-in-water emulsion for the cold rolling of aluminium and its alloys - Google Patents

Oil-in-water emulsion for the cold rolling of aluminium and its alloys Download PDF

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Publication number
EP0048216A1
EP0048216A1 EP81810351A EP81810351A EP0048216A1 EP 0048216 A1 EP0048216 A1 EP 0048216A1 EP 81810351 A EP81810351 A EP 81810351A EP 81810351 A EP81810351 A EP 81810351A EP 0048216 A1 EP0048216 A1 EP 0048216A1
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Prior art keywords
emulsion
weight
parts
water
oil
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EP81810351A
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German (de)
French (fr)
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EP0048216B1 (en
Inventor
Rudolf Baur
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Alcan Holdings Switzerland AG
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Alusuisse Holdings AG
Schweizerische Aluminium AG
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Priority to AT81810351T priority Critical patent/ATE9712T1/en
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    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
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    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
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    • C10N2040/245—Soft metals, e.g. aluminum
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    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles

Definitions

  • the invention relates to an oil-in-water emulsion for the cold rolling of light metals, in particular aluminum and aluminum alloys, with, for example, polyisobutylene as a hydrodynamic film former, alkyl monocarboxylic acid esters as reaction layer former, polyethoxylated sorbitan oleate as an emulsifier, unsaturated, long-chain alkyl monocarboxylic acid prodrug, as an inhibitor against hydrogen rust inhibitor against hydrogen, Hexamethylenetetramine as stabilizer, fungicide and bactericide as well as deionized water.
  • polyisobutylene as a hydrodynamic film former
  • alkyl monocarboxylic acid esters as reaction layer former
  • polyethoxylated sorbitan oleate as an emulsifier
  • unsaturated, long-chain alkyl monocarboxylic acid prodrug as an inhibitor against hydrogen rust inhibitor against hydrogen
  • Hexamethylenetetramine as stabilizer
  • oil-in-water emulsions allow much better cooling due to the greater heat of evaporation of water and thus greater stitch reduction and / or increased rolling speed.
  • aqueous rolling agents pose greatly reduced exhaust air problems and are less dependent on oil. For this reason, many attempts have been made in the light metal industry, in particular in the aluminum industry, to use oil-in-water emulsions when cold-rolling strips.
  • a major disadvantage of the oil-in-water emulsions belonging to the state of the art is that the the rolling process reacts freshly generated metal surface with water within a few seconds. This superficial corrosion attack as a result of the water phase leads to annoying spots on the belt surface. The reduced surface quality of a tape or film due to the formation of these so-called water stains is inadequate for many applications.
  • the inventor has set himself the task of creating an oil-in-water emulsion of the type mentioned at the outset for cold rolling light metals, in particular aluminum and aluminum alloys, with which the formation of water spots on the freshly rolled strip surface can be reduced .
  • the object is achieved according to the invention in that the emulsion additionally contains xylitol and sorbitol as an inhibitor against water stain formation.
  • xylitol and sorbitol together to form an oil-in-water emulsion largely prevents the formation of water stains. It is therefore no longer absolutely necessary to remove the emulsion from the surface of the freshly rolled strips.
  • the inhibitor is already fully effective when 1000 parts by weight of the emulsion contain 1 to 30 parts by weight of xylitol and sorbitol.
  • the effect of the inhibitor composed of xylitol and sorbitol can be increased further by adding glycerol.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)

Abstract

Die Oel-in-Wasser-Emulsion enthält neben den üblichen Komponenten zusätzlich Xylit und Sorbit als Inhibitor gegen Wasserfleckenbildung. Der Inhibitor ist bereits voll wirksam, wenn 1000 Gewichtsteile der Emulsion je 1 bis 30 Gewichtsteile Xylit und Sorbit enthalten. Durch diesen Inhibitorzusatz wird die Reaktion der Wasserphase mit der durch den Walzvorgang frisch erzeugten Metalloberfläche weitgehend unterbunden und damit die Bildung von störenden Flecken auf der Bandoberfläche verhindert.In addition to the usual components, the oil-in-water emulsion also contains xylitol and sorbitol as inhibitors against water stains. The inhibitor is already fully effective when 1000 parts by weight of the emulsion contain 1 to 30 parts by weight of xylitol and sorbitol. This inhibitor additive largely prevents the reaction of the water phase with the metal surface freshly produced by the rolling process and thus prevents the formation of disturbing spots on the strip surface.

Description

Die Erfindung bezieht sich auf eine Oel-in-Wasser-Emulsion zum Kaltwalzen von Leichtmetallen, insbesondere Aluminium und Aluminiumlegierungen, mit beispielsweise Polyisobutylen als hydrodynamischen Filmbildner, Alkylmonocarbonsäurestern als Reaktionsschichtbildner, polyäthoxylierten Sorbitanoleaten als Emulgator, ungesättigten, langkettigen Alkylmonocarbonsäuren als Inhibitor gegen Wasserstoffversprödung und Rostbildung, Hexamethylentetramin als Stabilisator, Fungicid und Baktericid sowie deionisiertem Wasser.The invention relates to an oil-in-water emulsion for the cold rolling of light metals, in particular aluminum and aluminum alloys, with, for example, polyisobutylene as a hydrodynamic film former, alkyl monocarboxylic acid esters as reaction layer former, polyethoxylated sorbitan oleate as an emulsifier, unsaturated, long-chain alkyl monocarboxylic acid prodrug, as an inhibitor against hydrogen rust inhibitor against hydrogen, Hexamethylenetetramine as stabilizer, fungicide and bactericide as well as deionized water.

Verglichen mit Walzschmiermitteln auf Oelbasis ermöglichen Oel-in-Wasser-Emulsionen wegen der grösseren Verdampfungswärme von Wasser eine viel bessere Kühlung und damit eine grössere Stichabnahme und/oder erhöhte Walzgeschwindigkeit. Neben diesen rein wirtschaftlichen Faktoren, die Rationalisierungsbestrebungen weitgehend entgegenkommen, muss weiter berücksichtigt werden, dass wässrige Walzmittel stark verminderte Abluftprobleme stellen und weniger vom Erdöl abhängig sind. Deshalb sind in der Leichtmetallindustrie, insbesondere in der Aluminiumindustrie, schon viele Versuche unternommen worden, beim Kaltwalzen von Bändern Oel-in-Wasser-Emulsionen einzusetzen.Compared to oil-based rolling lubricants, oil-in-water emulsions allow much better cooling due to the greater heat of evaporation of water and thus greater stitch reduction and / or increased rolling speed. In addition to these purely economic factors, which largely meet rationalization efforts, it must also be taken into account that aqueous rolling agents pose greatly reduced exhaust air problems and are less dependent on oil. For this reason, many attempts have been made in the light metal industry, in particular in the aluminum industry, to use oil-in-water emulsions when cold-rolling strips.

Aus der DE-AS 26 32 142 ist eine Oel-in-Wasser-Emulsion zum Kaltwalzen von Leichtmetallen bekannt, die Alkylmonocarbonsäureester als Reaktionsschichtbildner, Polyisobutylen als hydrodynamischen Filmbildner, polyäthoxylierte Sorbitanoleate als Emulgator, ungesättigte, langkettige Alkylmonocarbonsäuren als Inhibitor gegen Wasserstoffversprödung und Rostbildung, Hexamethylentetramin als Stabilisator, Fungicid und Baktericid, Rest deionisiertes Wasser enthält.From DE-AS 26 32 142 an oil-in-water emulsion for cold rolling light metals is known, the alkyl monocarboxylic acid esters as reaction layer formers, polyisobutylene as hydrodynamic film formers, polyethoxylated sorbitanoleates as emulsifiers, unsaturated, long-chain alkyl monocarboxylic acids as inhibitors against hydrogen embrittlement, and hexamine embrittlement and rust amine embrittlement and hexamine embrittlement and rust formation as stabilizer, fungicide and bactericide, the rest contains deionized water.

Ein wesentlicher Nachteil der dem Stand der Technik zugehörigen Oel-in-Wasser-Emulsionen liegt darin, dass die durch den Walzvorgang frisch erzeugte Metalloberfläche innerhalb weniger Sekunden mit Wasser reagiert. Dieser oberflächliche Korrosionsangriff als Folge der Wasserphase führt zu störenden Flecken auf der Bandoberfläche. Die durch die Bildung dieser sogenannten Wasserflecken verminderte Oberflächenqualität eines Bandes bzw. einer Folie ist für viele Anwendungszwecke ungenügend. Es ist deshalb bei Anwendung der bekannten Oel-in-Wasser-Emulsionen unbedingt erforderlich, die Emulsion unmittelbar nach dem Austritt des Bandes aus dem Walzwerk beispielsweise durch Abblasen mit Druckluft möglichst vollständig von der gewalzten Bandoberfläche zu entfernen.A major disadvantage of the oil-in-water emulsions belonging to the state of the art is that the the rolling process reacts freshly generated metal surface with water within a few seconds. This superficial corrosion attack as a result of the water phase leads to annoying spots on the belt surface. The reduced surface quality of a tape or film due to the formation of these so-called water stains is inadequate for many applications. When using the known oil-in-water emulsions, it is therefore absolutely necessary to remove the emulsion as completely as possible from the rolled strip surface immediately after the strip has left the rolling mill, for example by blowing it off with compressed air.

Angesichts dieser Gegebenheiten hat sich der Erfinder die Aufgabe gestellt, eine Oel-in-Wasser-Emulsion der eingangs erwähnten Art zum Kaltwalzen von Leichtmetallen, inbesondere Aluminium und Aluminiumlegierungen, zu schaffen, mit welcher die Bildung von Wasserflecken auf der frisch gewalzten Bandoberfläche vermindert werden kann.In view of these circumstances, the inventor has set himself the task of creating an oil-in-water emulsion of the type mentioned at the outset for cold rolling light metals, in particular aluminum and aluminum alloys, with which the formation of water spots on the freshly rolled strip surface can be reduced .

Die Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Emulsion zusätzlich als Inhibitor gegen Wasserfleckenbildung Xylit und Sorbit enthält.The object is achieved according to the invention in that the emulsion additionally contains xylitol and sorbitol as an inhibitor against water stain formation.

Durch den gemeinsamen Zusatz von Xylit und Sorbit zu einer Oel-in-Wasser-Emulsion wird die Bildung von Wasserflecken weitgehend unterbunden. Ein Entfernen der Emulsion von der Oberfläche der frisch gewalzten Bänder ist somit nicht mehr unbedingt erforderlich. Der Inhibitor ist bereits voll wirksam, wenn 1000 Gewichtsteile der Emulsion je 1 bis 30 Gewichtsteile Xylit und Sorbit enthalten.The addition of xylitol and sorbitol together to form an oil-in-water emulsion largely prevents the formation of water stains. It is therefore no longer absolutely necessary to remove the emulsion from the surface of the freshly rolled strips. The inhibitor is already fully effective when 1000 parts by weight of the emulsion contain 1 to 30 parts by weight of xylitol and sorbitol.

Es hat sich des weiteren herausgestellt, dass die Wirkung des aus Xylit und Sorbit zusammengesetzten Inhibitors durch die Zugabe von Glycerin noch gesteigert werden kann. Vorteilhafterweise enthalten 1000 Gewichtsteile der Emulsion 20 bis 90 Gewichtsteile Glycerin.It has further been found that the effect of the inhibitor composed of xylitol and sorbitol can be increased further by adding glycerol. Advantageously contain 1000 parts by weight of the emulsion 20 to 90 parts by weight of glycerin.

Der Zusatz von Xylit, Sorbit und gegebenenfalls Glycerin beeinflusst den Walzvorgang nicht und führt bei einer anschliessenden Glühung der gewalzten Bänder auch nicht zu Rückständen auf der Bandoberfläche.The addition of xylitol, sorbitol and possibly glycerin does not influence the rolling process and does not lead to residues on the strip surface when the rolled strips are subsequently annealed.

Die Vorteilhaftigkeit des erfindungsgemässen Zusatzes des Inhibitors gegen Wasserfleckenbildung geht aus den Versuchen mit den nachstehend angeführten Kaltwalzemulsionen hervor.The advantageousness of the inventive addition of the water spot inhibitor is evident from the tests with the cold rolling emulsions listed below.

Emulsion 1Emulsion 1

Figure imgb0001
Figure imgb0001

Emulsion 2Emulsion 2

Figure imgb0002
Figure imgb0002

Emulsion 3Emulsion 3

Figure imgb0003
Figure imgb0003

Die organischen Komponenten wurden bei Raumtemperatur unter einfachem Rühren zusammengegeben und mit deionisiertem Wasser versetzt. Die beiden getrennten Phasen wurden anschliessend in einer Emulgiermaschine zu einer Emulsion verarbeitet.The organic components were combined at room temperature with simple stirring and deionized water was added. The two separate phases were then processed into an emulsion in an emulsifying machine.

Mit den vorstehend genannten Emulsionen wurden auf einem Einzelquartogerüst Kaltwalzversuche mit Aluminium der Reinheit Al 99,2 durchgeführt. Die Stichabnahmen betrugen teilweise bis zu 92%. An den gewalzten Aluminiumbändern konnten in keinem Fall Anzeichen von Wasserfleckenbildung beobachtet werden. Ebenso führte keine der Emulsionen bei einer anschliessenden Glühung der gewalzten Bänder zu Rückständen auf der Bandoberfläche.With the above-mentioned emulsions, cold rolling tests with aluminum of purity Al 99.2 were carried out on a single quarter stand. Some of the stitch decreases were up to 92%. In no case were there any signs of water spots on the rolled aluminum strips. Likewise, none of the emulsions caused residues on the strip surface when the rolled strips were subsequently annealed.

Claims (4)

1. Oel-in-Wasser-Emulsion zum Kaltwalzen von Leichtmetallen, insbesondere Aluminium und Aluminiumlegierungen, mit beispielsweise Polyisobutylen als hydrodynamischen Filmbildner, Alkylmonocarbonsäureestern als Reaktionsschichtbildner, polyäthoxylierten Sorbitanoleaten als Emulgator, ungesättigten, langkettigen Alkylmonocarbonsäuren als Inhibitor gegen Wasserstoffversprödung und Rostbildung, Hexamethylentetramin als Stabilisator, Fungicid und Baktericid sowie deionisiertem Wasser, dadurch gekennzeichnet, dass die Emulsion zusätzlich als Inhibitor gegen Wasserfleckenbildung Xylit und Sorbit enthält.1. Oil-in-water emulsion for the cold rolling of light metals, especially aluminum and aluminum alloys, for example, polyisobutylene as hydrodynamic film former Alkylmonocarbonsäureestern as a reaction layer, polyethoxylated sorbitan oleates as emulsifier, unsaturated, long-chain alkyl monocarboxylic acids as inhibitor against hydrogen embrittlement and rust formation, hexamethylenetetramine as stabilizer Fungicid and bactericid as well as deionized water, characterized in that the emulsion additionally contains xylitol and sorbitol as an inhibitor against water staining. 2. Emulsion nach Anspruch 1, dadurch gekennzeichnet, dass 1000 Gewichtsteile der Emulsion je 1 bis 30 Gewichtsteile Xylit und Sorbit enthalten.2. Emulsion according to claim 1, characterized in that 1000 parts by weight of the emulsion each contain 1 to 30 parts by weight of xylitol and sorbitol. 3. Emulsion nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass sie zusätzlich Glycerin enthält.3. Emulsion according to one of claims 1 or 2, characterized in that it additionally contains glycerol. 4. Emulsion nach Anspruch 3, dadurch gekennzeichnet, dass 1000-Gewichtsteile der Emulsion 20 bis 90 Gewichtsteile Glycerin enthalten.4. Emulsion according to claim 3, characterized in that 1000 parts by weight of the emulsion contain 20 to 90 parts by weight of glycerol.
EP81810351A 1980-09-12 1981-08-27 Oil-in-water emulsion for the cold rolling of aluminium and its alloys Expired EP0048216B1 (en)

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DE3035016A DE3035016C2 (en) 1980-09-12 1980-09-17 Oil-in-water emulsion for cold rolling light metals

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US5211861A (en) * 1988-09-19 1993-05-18 Ausimont S.R.L. Liquid aqueous compositions comprising perfluoropolyethereal compounds suitable as lubricants in the plastic processing of metals
EP1882873A1 (en) 2006-07-28 2008-01-30 Carl Freudenberg KG Method of measuring a physical magnitude in a joint

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CH646193A5 (en) * 1980-09-12 1984-11-15 Alusuisse OIL-IN-WATER EMULSION FOR THE COLD ROLLING OF LIGHT METALS.
JP3133141B2 (en) * 1992-04-03 2001-02-05 日石三菱株式会社 Metalworking oil composition
TW548330B (en) * 2001-09-21 2003-08-21 Nippon Oil Corp Lubricating oil composition for aluminum processing
DE102009010757A1 (en) 2008-02-28 2009-09-10 F & B Gmbh Feuerschutz & Baustofftechnik Lubricants and lubricants
JP6854481B2 (en) * 2017-04-05 2021-04-07 トヨタ自動車北海道株式会社 Water-soluble metal processing oil composition and metal processing method

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FR2391261A1 (en) * 1977-05-18 1978-12-15 Shell France Poly:ol(s) esp. D-sorbitol useful as corrosion inhibitors - for aluminium (alloys) esp. in aq. systems e.g. refrigerant liq. circuits

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WO1991018074A1 (en) * 1990-05-14 1991-11-28 Idemitsu Kosan Co., Ltd. Lubricant composition for metal working
EP1882873A1 (en) 2006-07-28 2008-01-30 Carl Freudenberg KG Method of measuring a physical magnitude in a joint
FR2904396A1 (en) 2006-07-28 2008-02-01 Freudenberg Meillor Soc Par Ac METHOD FOR MEASURING A PHYSICAL SIZE IN A JOINT

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AU7438781A (en) 1982-03-18
AR224704A1 (en) 1981-12-30
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US4326974A (en) 1982-04-27
DK150548B (en) 1987-03-23
AU543996B2 (en) 1985-05-16
JPS5780496A (en) 1982-05-20
IE812122L (en) 1982-03-12
PT73661B (en) 1983-10-20
DE3035016A1 (en) 1982-04-01
JPH0227391B2 (en) 1990-06-15
BR8105802A (en) 1982-05-25
CA1161827A (en) 1984-02-07
EP0048216B1 (en) 1984-10-03

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