Deterioration Evaluation of Organic Coated Steel under Different Environmental Conditions
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概要
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The corrosion protective property given to coated steels by epoxy (EP) and alkyd resin (LAR) paints was evaluated by electrochemical measurements such as electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET) under different environmental conditions. With respect to the organic coatings investigated in the study, the life of coating film (t<SUB>s</SUB>) immersed in a 3% NaCl solution was obtained from film resistance (R<SUB>f</SUB>) measurements and the is values were observed in the order, 340 h for LAR (20μm) < 770 h for LAR (40μm) < 990 h for EP (20μm). The electric current density (i) obtained by SVET increased with increasing immersion time, and reached a constant value after 3 days. Such constant value was observed to be in good correlation with film resistance (R<SUB>f</SUB>) obtained by EIS.
- Japan Society of Colour Materialの論文