Th e influenc e of nano SiO۲ on the rate of corrosion of steel embedded in reinf orced concrete

Corrosion of reinforcing steel in concrete has become a major pr oblem world -wide, especially for such structures as bridges, parking de cks, tunnels , offshore structures and other buildings exposed to aggressive environ ments due to seawater. Corrosion rate is an important parameter for quantitatively predicting the service life of reinforced concrete structures which is limited by the corrosion deterioration. Thus the performance of different types of additives as ex ample inhibitors, super plasticizer, nanoparticle…. against corrosion in chloride contaminated concr ete made with different types of ce ment can be evaluated by measuring the corrosion rate, so that the be st possible combinations can be recommended for use in ag gressive chloride environments. The various non-destructive techniques used for t he determin ation of corrosion rate a re linear polarization resistance (L PR) method, AC impedance spectr oscopy and Tafel plot t echnique. This paper aims to stud y the effect of nano SiO۲ on the c orrosion of steel reinforcement by using the Tafel plot (TP) technique.

کلیدواژه ها:

Tafel plot ، Impedance spectroscopy ، Este rn-Geary ، C alcium hyd roxide