US2005043189A1PendingUtilityA1

Lubricant for improved surface quality of cast aluminum and method

37
Priority: Aug 18, 2003Filed: Aug 18, 2003Published: Feb 24, 2005
Est. expiryAug 18, 2023(expired)· nominal 20-yr term from priority
Inventors:Patricia A. StewartRay T. RichterThomas J. KasunJoseph T. LaemmleNickolas C. KotowDavid H. DeyoungJ. KirbyAlvaro GironRaymond ColbertLarry F. Wieserman
C10M 2215/26C10M 147/04C10M 2205/0265C10M 2201/102C10M 2215/20B22D 11/07C10M 2207/3045C10M 2215/18C10M 2207/2835C10M 2201/042C10M 2201/087C10M 2201/082C10M 2211/06C10M 2201/085C10M 2213/04C10N 2030/10C10M 2207/402C10M 2205/0206C10M 147/02C10M 2207/2815B22D 11/0668C10M 2201/081C10M 2213/06C10M 2213/062C10M 169/04
37
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Claims

Abstract

In an oxidation inhibiting lubricant composition suitable for use in the manufacture of aluminum alloys comprising lubricant base selected from the group consisting of solid lubricants, liquid lubricants, grease lubricants, emulsion lubricants, and dispersion lubricants, the improvement wherein the lubricant composition further comprises: an effective amount of a fluorine-containing passivating compound.

Claims

exact text as granted — not AI-modified
1 . In an oxidation inhibiting lubricant composition suitable for use in the manufacture of aluminum alloys comprising lubricant base selected from the group consisting of solid lubricants, liquid lubricants, grease lubricants, emulsion lubricants, and dispersion lubricants, the improvement wherein said lubricant composition further comprises: an effective amount of a fluorine-containing passivating compound.  
     
     
         2 . The lubricant composition of  claim 1  comprising about 0.1% to about 10% by weight of said fluorine containing passivating compound.  
     
     
         3 . The lubricant composition of  claim 1  comprising about 1% to about 8% by weight of said fluorine containing passivating compound.  
     
     
         4 . The lubricant composition of  claim 1  comprising about 3% to about 5% by weight of said fluorine containing passivating compound.  
     
     
         5 . The lubricant composition of  claim 1  wherein said passivating compound comprises an inorganic fluorine-containing compound.  
     
     
         6 . The lubricant composition of  claim 1  wherein said passivating compound comprises an organic fluorine-containing compound.  
     
     
         7 . The lubricant composition of  claim 1  comprising wherein said fluorine-containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium hexafluorophosphate, potassium zirconium fluoride, sodium fluoborate, tetradecafluorohexane, cryolite, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         8 . The lubricant composition of  claim 1  sheared in a high speed mixing operation prior to use in the manufacture of aluminum alloys.  
     
     
         9 . An oxidation inhibiting lubricant composition for use in the casting of aluminum alloys comprising: casting lubricant base selected from the group consisting of glycerol trioleate, ethyl oleate, methyl oleate, butyl ricinoleate, methyl acetyl ricinoleate, butyl oleate, glycerol triacetyl rincinoleate, butyl acetyl rincinoleate, polyalphaolefins, poly isobutlyenes, castor oil, peanut oil, corn oil, canola oil, cotton seed oil, olive oil, rapseed oil, safflower oil, sesame oil, sunflower oil, soybean oil, linseed oil, coconut oil, palm kernel oil, neatsfoot oil, and combinations thereof, the improvement wherein said lubricant composition further comprises: adding an effective amount of a fluorine-containing passivating compound.  
     
     
         10 . The lubricant composition of  claim 9  comprising about 0.1% to about 10% by weight of said fluorine containing passivating compound.  
     
     
         11 . The lubricant composition of  claim 9  comprising about 1% to about 8% by weight of said fluorine containing passivating compound.  
     
     
         12 . The lubricant composition of  claim 9  comprising about 3% to about 5% by weight of said fluorine containing passivating compound.  
     
     
         13 . The lubricant composition of  claim 9  wherein said passivating compound comprises an inorganic fluorine-containing compound.  
     
     
         14 . The lubricant composition of  claim 9  wherein said passivating compound comprises an organic fluorine-containing compound.  
     
     
         15 . The lubricant composition of  claim 9  wherein said fluorine-containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium hexafluorophosphate, potassium zirconium fluoride, sodium fluoborate, tetradecafluorohexane, cryolite, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         16 . The lubricant composition of  claim 9  sheared in a high speed mixing operation prior to use in the casting of aluminum alloys.  
     
     
         17 . An oxidation inhibiting lubricant composition for use in the casting of aluminum alloys comprising: casting lubricant oil base selected from the group consisting of glycerol trioleate, ethyl oleate, methyl oleate, butyl ricinoleate, methyl acetyl ricinoleate, butyl oleate, glycerol triacetyl rincinoleate, butyl acetyl rincinoleate, castor oil, peanut oil, corn oil, canola oil, cotton seed oil, olive oil, rapseed oil, safflower oil, sesame oil, sunflower oil, soybean oil, linseed oil, coconut oil, palm kernel oil, neatsfoot oil, and combinations thereof, the improvement wherein said lubricant composition further comprises: an effective amount of a fluorine-containing passivating compound.  
     
     
         18 . The lubricant composition of  claim 17  comprising about 0.1% to about 10% by weight of said fluorine containing passivating compound.  
     
     
         19 . The lubricant composition of  claim 17  comprising about 1% to about 8% by weight of said fluorine containing passivating compound.  
     
     
         20 . The lubricant composition of  claim 17  comprising about 3% to about 5% by weight of said fluorine containing passivating compound.  
     
     
         21 . The lubricant composition of  claim 17  wherein said passivating compound comprises an inorganic fluorine-containing compound.  
     
     
         22 . The lubricant composition of  claim 17  wherein said passivating compound comprises an organic fluorine-containing compound.  
     
     
         23 . The lubricant composition of  claim 17  wherein said fluorine-containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium hexafluorophosphate, potassium zirconium fluoride, sodium fluoborate, tetradecafluorohexane, cryolite, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         24 . The lubricant of  claim 17  sheared in a high speed mixing operation prior to use in the casting of aluminum alloys.  
     
     
         25 . An oxidation inhibiting lubricant composition for use in the casting of aluminum alloys comprising: an existing casting lubricant oil base selected from the group consisting of glycerol trioleate, castor oil, and combinations thereof, the improvement wherein said lubricant composition further comprises: an effective amount of a fluorine-containing passivating compound.  
     
     
         26 . The lubricant composition of  claim 25  comprising about 0.1% to about 10% by weight of said fluorine containing passivating compound.  
     
     
         27 . The lubricant composition of  claim 26  comprising about 1% to about 8% by weight of said fluorine containing passivating compound.  
     
     
         28 . The lubricant composition of  claim 26  comprising about 3% to about 5% by weight of said fluorine containing passivating compound.  
     
     
         29 . The lubricant composition of  claim 26  wherein said passivating compound comprises an inorganic fluorine-containing compound.  
     
     
         30 . The lubricant composition of  claim 26  wherein said passivating compound comprises an organic fluorine-containing compound.  
     
     
         31 . The lubricant composition of  claim 26  wherein said fluorine-containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium fluoborate, sodium hexafluorophosphate, potassium zirconium fluoride, tetradecafluorohexane, cryolite, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         32 . The lubricant of  claim 17  sheared in a high speed mixing operation prior to use in the casting of aluminum alloys.  
     
     
         33 . An oxidation inhibiting lubricant composition for use in the casting of aluminum alloys comprising glycerol trioleate and about 1% to about 5% by weight of a fluorine-containing passivating compound.  
     
     
         34 . The oxidation inhibiting lubricant composition of  claim 33  wherein said fluorine containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium hexafluorophosphate, potassium zirconium fluoride, tetradecafluorohexane, cryolite, sodium fluoborate, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         35 . The lubricant of  claim 34  sheared in a high speed mixing operation prior to use in the casting of aluminum alloys.  
     
     
         36 . A process for the continuous casting of aluminum alloys wherein molten aluminum alloy is cast into a cooled mold having a lubricated inner mold wall, said process comprising the steps of: 
 a) lubricating an inner wall of a cooled, continuous casting mold with an oxidation inhibiting lubricant composition comprising: 
 i) a casting lubricant base selected from the group consisting of glycerol trioleate, ethyl oleate, methyl oleate, butyl ricinoleate, methyl acetyl ricinoleate, butyl oleate, glycerol triacetyl rincinoleate, butyl acetyl rincinoleate, polyalphaolefins, poly isobutlyenes, castor oil, peanut oil, corn oil, canola oil, cotton seed oil, olive oil, rapseed oil, safflower oil, sesame oil, sunflower oil, soybean oil, linseed oil, coconut oil, palm kernel oil, neatsfoot oil, and combinations thereof, and;  
 ii) an effective amount of a fluorine-containing passivating compound.  
   b) casting a molten aluminum alloy into said mold, whereby said oxidation inhibiting lubricant reduces the oxidation of said molten aluminum base alloy at the meniscus of said lubricated inner mold wall and said molten aluminum base alloy.    
     
     
         37 . The oxidation inhibiting lubricant composition of  claim 36  comprising about 0.1% to about 10% by weight of said fluorine containing passivating compound.  
     
     
         38 . The oxidation inhibiting lubricant composition of  claim 36  comprising about 1% to about 8% by weight of said fluorine containing passivating compound.  
     
     
         39 . The oxidation inhibiting lubricant composition of  claim 36  comprising about 3% to about 5% by weight of said fluorine containing passivating compound.  
     
     
         40 . The oxidation inhibiting lubricant composition of  claim 36  wherein said passivating compound comprises an inorganic fluorine-containing compound.  
     
     
         41 . The oxidation inhibiting lubricant composition of  claim 36  wherein said passivating compound comprises an organic fluorine-containing compound.  
     
     
         42 . The oxidation inhibiting lubricant composition of  claim 36  wherein said fluorine-containing passivating compound is selected from the group consisting of: ammonium hexafluozirconate, fluorinated carbon, sodium bifluoride, potassium bifluoride, magnesium fluoride, aluminum fluoride, sodium fluoride, calcium fluoride, sodium hexafluosilicate, sodium hexafluorophosphate, potassium zirconium fluoride, sodium fluoborate, tetradecafluorohexane, cryolite, polyhexafluoropropylene oxide, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymers, poly(ethylene-co-tetrafluoroethylene), and polytetrafluoroethylene.  
     
     
         43 . The lubricant of  claim 36  sheared in a high speed mixing operation prior to use in the casting of aluminum alloys.

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