Corrosion of Reinforced Concrete

Title :
Investigation of the early effectiveness of an amino-alcohol based corrosion inhibitor using simulated pore solutions and mortar specimens

Authors :
L. Benzina Mechmechea, L. Dhouibia, M. Ben Ouezdoub, E. Trikia, F. Zucchic

Abstract :

This study was carried out to determine effective modes of use of an amino-alcohol based mixed corrosion inhibitor. It was tested in fresh pore concrete simulating solutions. Their compositions and the practical procedures were chosen in order to simulate both curative and preventive modes of use. Effectiveness of the corrosion inhibitor was investigated through corrosion potential measurements, polarisation curves and microscopic observations. The best inhibiting capacity was noted when the inhibitor was introduced in the solution before the contamination with chlorides. Using this inhibitor as a curative mean gave a reduced effect especially when chlorides were present in the simulated pore solutions. The curative mode was tested in the case of mortar specimens. Its efficiency was demonstrated even in the case of chloride presence. For the mortar specimens, the reinforcement electrochemical behaviour was assessed through the corrosion potential measurements and the study of current density evolution.

Keywords :
Chloride, Inhibitor, Mortar, Pore solution, Steel corrosion

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