Effects of Na2Cr2O7 Inhibitor on the Corrosion Potential Response ofudSteel Reinforced Concrete in Saline Medium

摘要

Electrochemical monitoring method of the open circuit potential was used to investigate the effect ofudthe concentrations of Na2Cr2O7 on the corrosion potential response of steel reinforced concrete inudsodium chloride medium. In the study, five different concentrations of Na2Cr2O7 admixtures wereudemployed in a system of replicated samples of steel-reinforced concrete specimens partiallyudimmersed in 3.5% NaCl to simulate marine and saline environments. Forty days measured responsesudfrom these were subjected to the statistical analyses of the Normal and the Weibull distributionudfunctions and tested using the Kolmogorov-Smirnov goodness of fit criteria. Results obtained from theudanalyses identified 4 g Na2Cr2O7 with optimal averaged potential response inhibition performance byudthe Normal model which showed better agreements in its models of Na2Cr2O7 potential test data thanudthat obtained from the Weibull model of the same data. These bear pertinent implications on the needudfor suitability studies of appropriate statistical distribution for studying performance of corrosionudinhibitors even as suggestions were proffered for addressing results conflicts among replicates ofudsteel reinforced concrete samples employed.