ABSTRACT

The basic idea of the preliminary tests is to expose a number of concrete specimens with cast-in rebars to a 6 wt% NaCl solution and subsequently detect the onset of reinforcement corrosion by either open circuit measurement of electrochemical potentials or by observation of a significant increase in the current required to maintain a specific electrochemical potential of the rebar measured against a reference electrode. When corrosion onset is observed the chloride concentration is measured at the depth of the rebars, thus giving the chloride threshold value.