2019 Volume 68 Issue 10 Pages 280-283
To examine rebar corrosion in cracked concrete, we have exposed cracked test pieces of pre-stressed concrete containing two rebars to the outdoors and observed the electrochemical behavior. After one year from the start of the exposure test, the potential difference between rebars increased, so it seemed one of rebars has corroded. However, as the exposure test proceeded, the potential difference decreased to the initial state. In addition, destructive observations of test piece revealed that only one rebar had corroded. These results indicate that just one rebar was repassivated after the depassivation in cracked concrete.