Table of Contents
ISRN Materials Science
Volume 2011, Article ID 365276, 11 pages
http://dx.doi.org/10.5402/2011/365276
Research Article

Effect of Red Mud on the Corrosion of Reinforced Concrete Studied by Electrochemical Impedance Spectroscopy

1Department of Materials Science and Technology, Federal University of Bahia, Rua Aristides Novis 02, Federação, 40210-630 Salvador, BA, Brazil
2Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis, Km 235, 13565-905 São Carlos, SP, Brazil
3Ceramics and Glass Engineering Department, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
4UIDM, ESTG, Polytechnic Institute of Viana do Castelo, Avenida do Atlântico, 4900-348 Viana do Castelo, Portugal

Received 15 June 2011; Accepted 27 July 2011

Academic Editor: B. Luan

Copyright © 2011 D. V. Ribeiro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion of concrete reinforcement is a worldwide problem with serious consequences to humans, including accidental deaths that may occur due to the degradation of this material. Thus, techniques that can measure concrete reinforcement corrosion and provide a reliable prediction of this phenomenon are fundamental for the technological development of these materials. The corrosion of steel bars embedded in concrete containing varying amounts of red mud (up to 30% of the total binder) was tested by electrochemical impedance spectroscopy (EIS), under partial immersion in a sodium chloride solution. The addition of red mud delayed the onset of corrosion and possibly also reduced the corrosion rate.