1A.C. College of Engineering and Technology, Karaikudi, Tamilnadu.
2Govt. Arts College, Coimbatore, Tamilnadu.
3Central Electrochemical Research Institute, Karaikudi, Tamilnadu.
4B.S.A Crescent Engineering College, Chennai, Tamilnadu.
Conducting polymers are used as inhibitors for prevention of corrosion because of the large availability of (π) electrons enable them to function as very effective corrosion inhibitors. The present study deals with the effect of polyaniline incorporation with ZnO in 2M of NaOH solution on the corrosion of commercial aluminium alloys and studies using various electrochemical characterization techniques (Tafel polarization studies, Galvanostatic polarization studies and Open circuit potential measurements) were carried out. The inhibition of corrosion brought about by the addition of polyaniline was found to be under anodic control. 57S grade of commercial aluminium in 2M NaOH containing 0.2M ZnO and 700 ppm concentration in NMP is found to show most favourable characteristics for the performance as galvanic anodes in alkaline media.
Corrosion inhibitor, Aluminium, Galvanostatic polarization studies
