Effect of pH on the electrochemical corrosion behavior of reinforcing steel in simulated concrete pore solutions
The passivation and depassivation behavior of reinforcing steel in simulated concrete pore solutions (SPS) with different pH values was studied by the polarization curves,electrochemical impedance spectroscopy and scanning electron microscopy. The results indicated that reinforcing steel was in the passive state in the simulated concrete pore solution with pH 12.50. The lower the pH value of solutions, the more unstable the passive film of reinforcing steel. The critical pH value for the localized corrosion of the reinforcing steel in the simulated concrete pore solutions was between 11.12 and 11.05 based on the electrochemical measurements.
NETL
NSTL
万方数据
维普
