Acid aqueous phosphatic solution and process using same for phosphating metal surfaces
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United States of America Patent
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Jan 28, 1997
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N/A
app pub date -
Jul 31, 1995
filing date -
Aug 5, 1994
priority date (Note) -
Expired
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Abstract
An acid aqueous solution useful for phosphating metal surfaces and a phosphating process using same; said solution, which is characterized by its containing hydroxylamine phosphate as accelerator and a cationic surfactant, preferably a quaternary ammonic surfactant, can be applied to metal surfaces based on iron, zinc, aluminium and alloys thereof, and is specifically suitable for preventing the formation of white spots.
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