Incorporation of sodium molybdate in polyurethane coatings

International. Sodium molybdate was evaluated by Belgian researchers at the Free University of Brussels as an inhibitor of steel corrosion in brackish water. It was encapsulated by interfacial polymerization and the capsules produced were characterized.

Electrochemical impedance spectroscopy and corrosion potential measurements were used to determine corrosion inhibition in a short time, while polarization curves were used for estimation of inhibition efficiency. The composition of the capsules, the Na2MoO4 content and the speed of release were then determined. Na2MoO4 showed corrosion inhibition for at least 15 hours.

The capsules consist of polyurea and polyurethane which are formed due to the reaction of isocyanates with emulsion water and the use of surfactants, respectively. Most of the inhibitor is released within 90 min. Electrochemical impedance spectroscopy and electrode scanning technique showed corrosion inhibition in artificially damaged areas for coatings containing corrosion inhibitor capsules.

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Author: Duván Chaverra Agudelo

Jefe Editorial en Latin Press, Inc,.

Comunicador Social y Periodista con experiencia de más de 16 años en medios de comunicación. Apasionado por la tecnología y por esta industria. [email protected]