Synergistic metal polycarboxylate corrosion inhibitors
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsCraig Matzdorf, Frank Pepe, Michael Brindza, Joshua Walles
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Abstract
The invention comprises synergistic compositions of at least two metal carboxylates as corrosion inhibitors based on polycarboxylate anions and a variety of different cations. The inhibitors are designed to be added to film forming or other compositions to reduce the corrosion of the metal substrate on which the synergistic compositions are applied.
Claims20
Corrosion-resistant inhibitors consisting essentially of synergistic combinations of:
- at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts, and;
- at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts, wherein either the metal or the polycarboxylic acid in at least one of the polycarboxylic metal salts is different from the other polycarboxylic metal salt.
A corrosion-resistant coating for metal substrates comprising a polymeric binder and an effective amount of a corrosion-inhibitor consisting of a synergistic combination of at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts;
- and,
- at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts, wherein either the metal or the polycarboxylic acid in at least one of the polycarboxylic metal salts is different from the other polycarboxylic metal salt.
The process for treating metal to improve the metal's corrosion-resistance comprising coating the metal with a binder containing an effective amount of a corrosion-resistant inhibitor consisting essentially of a synergistic combination of at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts;
- and
- at least one metal polycarboxylate derived from the stoichiometric reaction of metal compounds and polycarboxylic acids to obtain polycarboxylic metal salts, wherein either the metal or the polycarboxylic acid in at least one of the polycarboxylic metal salts is different from the other polycarboxylic metal salt.
Dependencies are inferred from the claim text.