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Title

THE EFFECT OF MESOPOROUS SILICA NANOCONTAINERS INCORPORATION IN THE POLYMER COATINGS ON THE CORROSION BEHAVIOR OF COATED STEEL

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Abstract

 PROTECTIVE COATING WAS PRODUCED BY DISPERSING MESOPOROUS SILICA NANOCONTAINERS, LOADED WITH CORROSION INHIBITOR, SODIUM MOLYBDATE, IN THE EPOXY LAYER. THE CORROSION PROPERTIES OF THE COMPOSITE COATINGS WERE ASSESSED BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY AND ELECTROCHEMICAL NOISE. RESULTS SHOWED HIGHER CORROSION RESISTANCE OF EPOXY/MESOPOROUS SILICA LOADED INHIBITOR AS WELL AS SELF-HEALING ABILITY OF COATING IN NACL MEDIA FOR EIGHT WEEKS. CORROSION INHIBITORS RELEASED FROM NANOCONTAINERS IN RESPONSE OF CORROSION DAMAGE IN THE SCRATCH ZONE. BESIDES, THE ANALYTICAL INVESTIGATION OF SCRATCH ZONE SHOWED THAT OXIDATION STATE OF MO WAS (MO (VI)), WHICH CAN BE ATTRIBUTED TO THE FORMATION OF FE2 (MOO4)3 OR MOLYBDENUM OXIDES.

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