Study on polyaniline‐ZnO used as corrosion inhibitors of 57S aluminium in 2 M NaOH solution
Abstract
Purpose
The purpose of this paper is to study to minimize the self‐corrosion rate of Type 57S aluminium containing (97.7 per cent Al, 2 per cent Mn and 0.03 per cent Mg) in 2 M NaOH solution containing 0.2 M zinc oxide and 700 ppm of polyaniline.
Design/methodology/approach
The approach is used to measure weight loss and polarization measurements.
Findings
Results obtained show that as the amount of polyaniline is increased, the self‐corrosion rate of Alloy 57S aluminium decreases appreciably. Additionally, the open circuit potential is more in the case of 700 ppm level of polyaniline (−1.630 V) compare to 600 ppm level of polyaniline (−1.587 V). From this paper, it is also observed that the anodic polarization is greater than the cathodic polarization, thereby indicating that the overall corrosion of Alloy 57S 2 M NaOH containing 0.2 M ZnO and 700 ppm of polyaniline is under anodic control.
Originality/value
The results of the study clearly reveal that the overall corrosion of Alloy 57S aluminium in 2 M NaOH containing 0.2 M ZnO and 700 ppm of polyaniline is under anodic control. Hence, the 57S grade aluminium can be used as a potential candidate (anode) in alkaline batteries.
Keywords
Citation
Elango, A., Periasamy, V.M. and Paramasivam, M. (2009), "Study on polyaniline‐ZnO used as corrosion inhibitors of 57S aluminium in 2 M NaOH solution", Anti-Corrosion Methods and Materials, Vol. 56 No. 5, pp. 266-270. https://doi.org/10.1108/00035590910989561
Publisher
:Emerald Group Publishing Limited
Copyright © 2009, Emerald Group Publishing Limited