Corrosion inhibiting methods

摘要

Methods for inhibiting the corrosion of metals in contact with an aqueous system are provided. The method of inhibiting corrosion includes maintaining effective amounts of (1) an amino acid-based polymer, such as a polyaspartic acid compound, and (2) a dispersible and/or soluble tin compound in the aqueous system. The corrosion inhibiting components of the treatment may be added simultaneously or separately into the water of the aqueous system, i.e., provided either in a single treatment product or as separate products. Such a corrosion inhibiting method may optionally also include adding a polycarboxylic acid chelating agent and/or a carboxylate/sulfonate functional copolymer to the aqueous system.

主权项

1. A method of inhibiting corrosion of one or more metals in contact with an aqueous system, the method comprising adding one or more corrosion inhibitor compositions to the aqueous system, wherein the one or more corrosion inhibitor compositions comprise (1) an amino acid-based polymer and (2) a dispersible and/or water soluble tin compound; wherein the amino acid-based polymer has a molecular weight according to gel-permeation chromatographic analysis of at least about 1,000.