Corrosion-inhibiting automotive coolant solutions containing effective amounts of sodium silicate having a low ratio of silica to sodium oxide
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United States of America Patent
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Nov 30, 1993
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N/A
app pub date -
Aug 29, 1991
filing date -
Aug 29, 1991
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Expired
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Abstract
Non-corrosive anti-freeze solutions for automotive cooling systems include an anti-corrosive effective amount of a sodium silicate corrosion inhibitor. The sodium silicate has an unusually low ratio of silica to sodium oxide of greater than 1.0 to about 2.5. This relatively low ratio of silica to sodium oxide prevents gelation from occurring while maintaining maximum anti-corrosive effectiveness of alcohol-based solutions containing the same.
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