Active steel repassivator for corroded steel in chloride contaminated reinforced concrete structures
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United States of America Patent
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May 9, 2006
Grant Date -
Oct 14, 2004
app pub date -
May 3, 2004
filing date -
Sep 10, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An active steel repassivator for the rehabilitation of chloride contaminated reinforced concrete structures and a method for the application of same is disclosed. The active steel repassivator is comprised of a continuous phase, a distributed phase, and/or an aqueous solution of an amine. The continuous phase, also known as the carrier phase, is selected from organic strong volatile bases, salts of weak volatile acids and a non-ionic surfactant. The distributed phase includes an anion containing vanadium in the +4 or +5 state of oxidation. The aqueous solution of the amine acts as a co-inhibitor in the composition.
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