Abstract

SANDOVAL-JABALERA, Raúl et al. Electrochemical Behaviour of 1018, 304 and 800 Alloys in Synthetic Wastewater. J. Mex. Chem. Soc [online]. 2006, vol.50, n.1, pp.14-18. ISSN 1870-249X.

Due to the fact that corrosion problems affecting the residual water treatment industry are varied and scarcely studied, this work presents an investigation of the corrosion behavior of important materials of engineering such as steel AISI-1018, AISI-304, and AISI-800 exposed to synthetic residual water under laboratory conditions. The electrochemical techniques used to asses the electrochemical behavior were linear polarization resistance (LPR), cyclic polarization curves (CPC) and electrochemical noise (ECN) techniques to determine corrosion rates, the susceptibility to localized corrosion and the most likely corrosion mechanism, respectively. In order to ascertain the amount of aerobic and anaerobic bacteria present on the steel surface, the Most Probable Number method (MPN) was employed. On the whole, the steels studied showed a better corrosion resistance in the following order: 800 > 304 > 1018. Also, the experimental results indicated that none of the steels demonstrated susceptibility to localized corrosion.

Keywords : Polarization Resistance; Cyclic Polarization; Electrochemical Noise; Steels; Synthetic Wastewater.

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