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Formulated Didecyl Dimethyl Ammonium Bicarbonate/Carbonate (DDABC), a Multi- Metal Corrosion Inhibitor with Relevance to Commercial Surface Preparation and Coatings Technologies

A new water-soluble quaternary ammonium compound, didecyldimethylammonium bicarbonate/carbonate (DDABC), has been evaluated as a corrosion inhibitor via standard electrochemical tests on steel and shown to be highly effective. At the proper dilution, the inhibitor migrates to the metal/solution interface and forms a monomolecular film on the anodic sites. 

Product Number: 41207-306-SG
Author: Thomas C. Bedard, T. David Burleigh, Joseph Kimler
Publication Date: 2007
Industry: Coatings
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A new water-soluble quaternary ammonium compound, didecyldimethylammonium bicarbonate/carbonate (DDABC), has been evaluated as a corrosion inhibitor via standard electrochemical tests on steel and shown to be highly effective. At the proper dilution, the inhibitor migrates to the metal/solution interface and forms a monomolecular film on the anodic sites. Preliminary evaluations reported here indicate that DDABC and its phosphate and glycolate anion derivatives also exhibit a remarkable ability to improve the corrosion performance of several commercially relevant coatings including latex, alkyd, and urethane e-coat systems when used either as a pretreatment, sealing rinse, or formulated coatings additive. In some instances, DDABC provides corrosion performance enhancement in B117 salt spray tests of over 300% and creep improvements of 60–75%. Additional observations as an adhesion promoter, wetting agent and flash rust inhibitor are also reported.

A new water-soluble quaternary ammonium compound, didecyldimethylammonium bicarbonate/carbonate (DDABC), has been evaluated as a corrosion inhibitor via standard electrochemical tests on steel and shown to be highly effective. At the proper dilution, the inhibitor migrates to the metal/solution interface and forms a monomolecular film on the anodic sites. Preliminary evaluations reported here indicate that DDABC and its phosphate and glycolate anion derivatives also exhibit a remarkable ability to improve the corrosion performance of several commercially relevant coatings including latex, alkyd, and urethane e-coat systems when used either as a pretreatment, sealing rinse, or formulated coatings additive. In some instances, DDABC provides corrosion performance enhancement in B117 salt spray tests of over 300% and creep improvements of 60–75%. Additional observations as an adhesion promoter, wetting agent and flash rust inhibitor are also reported.

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