Post on 20-Feb-2018
7/24/2019 Concrete Notes Chloride Mohsin
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Passivating Layer in Concrete
Although steels natural tendency is toundergo corrosion reactions, the alkaline
environment of concrete (pH of 12 to 1!provides steel "ith corrosion protection#At the high pH, a thin o$ide layer formson the steel and prevents metal atomsfrom dissolving#
pH Scale
%umerical &calethat identifiesa'ueoussolution eing
acidic or alkaline 1) is ma$ *
refers toe$treme alkaline
+ is min * refersto e$tremeacidic
is neutral *"ater