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International Journal of Corrosion
Volume 2012, Article ID 847323, 8 pages
http://dx.doi.org/10.1155/2012/847323
Research Article

Corrosion Behaviour of a New Low-Nickel Stainless Steel Reinforcement: A Study in Simulated Pore Solutions and in Fly Ash Mortars

1Materials Science Institute of Madrid (CSIC), Energy, Environmental, and Sustainable Technologies, Sor Juana Inés de la Cruz 3, 28049 Cantoblanco-Madrid, Spain
2National Centre for Metallurgical Research (CENIM), CSIC, Surface Engineering, Corrosion, and Durability, Avenida Gregorio del Amo 8, 28040 Madrid, Spain

Received 23 December 2011; Accepted 24 February 2012

Academic Editor: Citlalli Gaona Tiburcio

Copyright © 2012 M. Criado 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 present paper studies the corrosion behaviour of a new lower-cost type of austenitic stainless steel (SS) with a low nickel content in alkaline-saturated calcium hydroxide solution (a simulated concrete pore (SCP) solution) with sodium chloride (0.0%, 0.4%, 1.0%, 2.0%, 3.0%, and 5.0% NaCl) and embedded in alkali-activated fly ash (AAFA) mortars manufactured using two alkaline solutions, with and without chloride additions (2% and 5%), in an environment of constant 95% relative humidity. Measurements were performed at early age curing up to 180 days of experimentation. The evolution with time of electrochemical impedance spectroscopy was studied. values obtained in SCP solution or in fly ash mortars were so high that low-nickel SS preserved its passivity, exhibiting high corrosion resistance