Aluminum Company of America

Dianne A Zadnik

Girma Biresaw

Aluminum alloy finstock for making heat exchanger fins. The finstock is prelubricated with a water-microemulsifiable lubricant composition comprising an oil, an anionic surfactant, a polyalkoxy alkylphenol cosurfactant, and optionally a C.sub.10 -C.sub.36 mono- or dicarboxylic acid. The lubricant composition is preferably applied to the finstock dissolved in hexane which is then evaporated, leaving a water-microemulsifiable lubricant residue. The lubricated product is readily washable with water to microemulsify the lubricant residue into a microemulsion.

Process for making an aluminum alloy finstock lubricated by a

An aluminum alloy preform having an outer surface portion prelubricated with a film of a water-microemulsifiable lubricant composition comprising an oil, an anionic surfactant, a non-ionic cosurfactant, and optionally a C.sub.10 -C.sub.36 mono- or dicarboxlyic acid. The lubricant composition is dissolved in an organic solvent (preferably hexane) and applied to the preform. The solvent evaporates, leaving a water-microemulsifiable lubricant film. The lubricated product is readily washable with water to microemulsify the lubricant film into a microemulsion.

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New Kensington, PA, United States of America

Dianne A Zadnik