Abstract

The influence of the alkaline content of cement on the corrosion kinetics of galvanized reinforcements has been studied, by means of the polarisation resistance method, in saturated solutions of ${\displaystyle Ca(OH)_{2}}$ with additions of NaOH, KOH and ${\displaystyle SO^{2}4}$, thus simulating the liquid phase of concrete.It has been established that below a threshold pH the coating protects the surface; above this pH the coating is attacked, disappearing in a few days. Cements with low alkali contents and proper concrete dosage must therefore be used to ensure that the pH remains below the threshold value.

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Published on 01/01/1983

DOI: 10.1179/000705983798273912