Regresar

Electrochemical impedance spectroscopy analysis on steel embedded in a concrete alkali exposed on the chloride media

Abstract:

The technique of Electrochemical Impedance Spectroscopy (EIS) is used in this study to evaluate the action of chloride ion on the structural steel ASTM A 706 embedded in an alkali-activated concrete composed of: blast furnace slag, fly ash and mixing of blast furnace slag and fly ash. The study was performed by subjecting the individual to a solution containing chloride ion, simulating conditions in marine environments, the ion, added as NaCl in solution assays to 3.5%. The effect of chloride ions in concrete and its consequences, in the steel was analyzed by the scanning electron microscopy techniques. Is managed to determine the effect of chloride ions on the breakdown of the passivity of steel, and in general metal electrochemical behavior when immersed in these novel ceramic materials.