Volatile organic solvent reduction technology in coating process is being extensively studied to prevent air pollution. Recently developed eco-friendly coatings such as water-borne coatings, solvent free coatings and powder coatings have many limitations regarding the workability and anti-corrosion performances. In this study, the green coating process using supercritical carbon dioxide was developed. Supercritical carbon dioxide (CO2) acts as a volatile solvent instead of traditional organic solvent in the coating materials without pollution. A feasibility study of the supercritical carbon dioxide as a solvent thinner on the various heavy-duty coatings was performed. Atomization and film deposit characteristics of coating materials were improved by supercritical carbon dioxide. Corrosion protection performance of the thin inorganic zinc coating films using supercritical carbon dioxide was the same as that of coating films using organic solvent.

Subject
Films, Volatile organic compounds, Costs, Coating performance, Zinc rich coatings, Coating application, Spray coating, Solvents, Epoxy coatings, Powder coatings, Carbon dioxide, Zinc, Inorganic zinc rich coatings
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2014
Association for Materials Protection and Performance (AMPP)
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