Method of protecting a surface
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Oct 27, 1994
filing date -
Sep 20, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a method of protecting a surface of a carbonatic material from corrosion, the method comprising treatment of the material surface with an acidic cationic silica sol, the pH of the sol preferably being from about 4 to about 7. The invention also concerns a new silica sol useful for performing the method and a method of preparing the new silica sol. Further, the invention concerns carbonatic material comprising a surface layer of silica, the surface of the silica particles comprising a polyvalent metal oxide/hydroxide.
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