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The purpose of placing steel in reinforced concrete structures is to increase the tensile strength of concrete. The diameters of the reinforcements steel in the concrete decrease as a result of electro-chemical reactions. Therefore; corrosion of reinforcement steels is the most important problem in the buildings. As a result of some experimental study, the ductility and ultimate load-carrying capacity decreases as the corrosion rate was increased. In this study, reinforcements steel with diameters of ø12, ø14 and ø16, respectively, were exposed to accelerated corrosion by applying 18 V DC stress intensity for 18 hrs. The solutions whose NaCl ratios are 3, 3.5 and 4%, respectively, were prepared to investigate the effect of NaCl on accelerated corrosion on reinforcement steel. As a result; it has been observed that as the NaCl ratio decreases and reinforcement steel diameter increases, the corrosion rate decreases.
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