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