Corrosion rate and corrosion products characterization of reinforcing steel embedded in fly ash mortars with and without chloride was monitored using electrochemical techniques and Raman spectroscopy, respectively. After 720 days of experimentation the reinforcing steel embedded in fly ash mortar without chlorides remained passive, while the specimens in fly ash polluted with chloride ions (0.4% and 2%) yielded current density values of the order of 2 equation image A equation image, typical of an active state. The main corrosion products generated were iron oxyhydroxides hydrates in the light regions and goethite or lepidocrocite in the dark regions.

More detailed information can be found in: M. Criado, S. Martínez-Ramirez, S. Fajardo, P. P. Gómez, J. M. Bastidas, Corrosion rate and corrosion product characterisation using Raman spectroscopy for steel embedded in chloride polluted fly ash mortar, Materials and Corrosion 2013, 64, 372.