Corrosion is a major concern for all materials during their service lives. In particular, salts such as sodium chloride (NaCl) are known to promote corrosion and detrimentally affect coating performance. Understanding how NaCl affects water uptake into a film and its interactions with corrosion-inhibiting pigments is important for developing the next generation of anticorrosive coatings. Energy Dispersive Spectroscopy was employed to qualitatively determine the presence of NaCl in coating free films after immersion in aqueous NaCl solutions. The results correlated well with Inductively Coupled Plasma (ICP) data of the same solutions for the amount of sodium lost during immersion, but not for the chloride. ICP also detected the presence of zinc and phosphate ions that had leached from the coating.

Subject
Scanning electron microscopy, Films, Zinc rich coatings, Energy dispersive X-ray spectroscopy, Water, Pigments, Sodium chloride, Sodium chloride solution, Phosphates, Sodium, Salt concentration, Immersion, Zinc
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2015
Association for Materials Protection and Performance (AMPP)
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