Method for coating a metal surface with an ultrafine layer
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United States of America Patent
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Jun 14, 2011
Grant Date -
Jun 21, 2007
app pub date -
Nov 2, 2004
filing date -
Dec 17, 2003
priority date (Note) -
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Abstract
A method for continuously coating a substrate in motion such as a metal strip made of steel, the coating formed being an ultra-fine film of a thickness between 10 and 100 nm, deposited on the substrate: from a solution containing nanoparticles of oxides, in conditions of controlled pH, said substrate being at a temperature higher than 120° C., the total duration of the deposition being less than 5 seconds and preferably less than 1 second, characterized in that at least one chemical additive, called a “refiner”, is incorporated into said solution, said refiner having, mutatis mutandis, the effect of restricting the formation of said coating.
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