Abstract
Electrodeposition of polypyrrole on iron was performed in potassium tetraoxalate 0.05 M and pyrrole 0.1 M solution at a current of 1 mA/cm 2. This procedure yielded strongly adherent and smooth polymer layers. The corrosion of iron protected by polypyrrole films with different thickness in NaCl 3% solution was investigated by open circuit potentials and electrochemical impedance spectroscopy. The protection time was found to increase in an exponential way on the synthesis charge. The impedance diagram response was mainly ascribed to the polymer films rather than to the underlying passive film, and the protection mechanism was mostly of galvanic type.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
