Electrochemical and mechanical properties of binder system mixed with nano-clay / Siti Mas Zalina Razali

The purposes of this thesis were to investigate the mechanical and electrochemical properties of coating system. A Dammar-Polyol binder system was examined by adding with nano-clay, Bentonite. The coating system was coated on Aluminium Q-panel as substrate. Curing time was taken five days before coating were tested by using cross-hatch test (ASTM D 3359-87) and impact test. The results were presented in term of damage grids in each sample and investigated the extent of the coating ability toward adhesion. Both of two tests showed a similar result in which the good performance was performed in 0.2 D sample which containing 20 wt% of dammar. Meanwhile, coating resistance, Rc, property of sample was characterized by electrochemical impedance spectroscopy, EIS, while the coated substrate was immersed in 3wt% of NaCl for 30 days. The result indicated that the 0.5 D which containing 50 wt% of dammar showed higher coating resistance than the other samples. However, the mixing of nano-clay into the Dammar-Polyol binder system was resulted the coating resistance of the sample became worse. But the addition of nano-clay was enhanced the mechanical properties of Dammar-polyol binder system.