Abstract
The influence of chloride ion on the corrosion of steel in high alumina cement mortar samples has been investigated by means of the polarization resistance technique. X-ray diffraction (XRD) has been employed to evaluate the evolution with time of the crystalline phases. The hexagonal to cubic conversion of the hydrated aluminates was clearly detected after prolonged storage of all samples being favoured by the presence of chloride ion. The water liberated from this conversion produced a dramatic decrease in the resistivity values of the mortars and an increase in corrosion intensity for the higher content of chloride tested (1% by weight of cement).
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