Fire retardant compositions containing ammonium polyphosphate and iron additives for corrosion inhibition
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United States of America Patent
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Oct 12, 2004
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app pub date -
Nov 28, 2000
filing date -
Nov 28, 2000
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Abstract
Corrosion-inhibited fire retardant compositions and methods of making and using the same are provided. The corrosion-inhibited fire retardant compositions are comprised of at least one fire retardant component, a suspending agent, and a corrosion inhibiting system. The corrosion inhibiting system is comprised of at least one corrosion inhibiting compound selected from a group of compounds including azoles, insoluble ferric pyrophosphate, soluble ferric pyrophosphate, ferrous oxalate, ferric citrate, ferrous sulfate, ferric ammonium citrate, insoluble ferric orthophosphate, soluble ferric orthophosphate, ferric ammonium oxalate, ferric ammonium sulfate, ferric bromide, ferric sodium oxalate, ferric stearate, ferric sulfate, ferrous acetate, ferrous ammonium sulfate, ferrous bromide, ferrous gluconate, ferrous iodide, ferric acetate, ferric fluoroborate, ferric hydroxide, ferric oleate, ferrous fumarate, ferrous oxide, ferric lactate, ferric resinate and any combination thereof. The corrosion inhibiting system is typically present in the fire retardant composition of the invention in a minor amount effective to substantially reduce corrosiveness of the concentrated fire retardant composition and of its diluted solution. Methods of using the corrosion inhibiting system and corrosion-inhibited agricultural plant nutrients are also provided.
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