2, 4‐Dinitrophenylhydrazine as a Corrosion Inhibitor for Copper in Sulphuric Acid
Abstract
Corrosion rates of copper in 1N sulphuric acid with various concentrations (10−8 to 10−4 M) of 2, 4‐dinitrophenylhydrazine (2, 4‐DNP) are determined by weight loss method. The corrosion rates (under diffusion control), are a function of the stirring rate and the concentration of 2, 4‐DNP. The corrosion rate decreased markedly on increasing the concentration of 2, 4‐DNP. The maximum corrosion inhibition (85%) is observed at 10−4 M 2, 4‐DNP. The anodic polarization data and the drift in corrosion potential with time towards the less noble direction reveal the inhibition of cathodic reaction of the corrosion process by 2, 4‐DNP. A mechanism is proposed to explain the inhibitor action of 2, 4‐DNP on copper during corrosion in 1N sulphuric acid.
Citation
Siddagangappa, S., Mayanna, S.M. and Pushpanadan, F. (1976), "2, 4‐Dinitrophenylhydrazine as a Corrosion Inhibitor for Copper in Sulphuric Acid", Anti-Corrosion Methods and Materials, Vol. 23 No. 8, pp. 11-13. https://doi.org/10.1108/eb007013
Publisher
:MCB UP Ltd
Copyright © 1976, MCB UP Limited