2011 Volume 60 Issue 10 Pages 438-440
Coating mixed with superabsorbent polymer and corrosion inhibitor was applied on a steel plate to investigate the corrosion prevention behavior. After creating an artificial defect on the specimen, polarization resistance of the scratched specimen was monitored in a 0.5 wt% NaCl solution at 35°C using an electrochemical impedance method. The polarization resistance of scratched specimen coated with superabsorbent polymer, calcium nitrate and vinylester polymer increased with increasing time in two stages, resulting in self-healing corrosion protective capability. Particulate film was observed in the scratched part of the specimen. Measuring polarization behavior, the film could be prevented cathodic reaction due to superabsorbent polymer in first stage, and anodic reaction due to calcium nitrate in second stage.