|
Title |
An Experimental Study of the Corrosion Behavior Evaluation of Rebar in Concrete by Using Electrochemical Impedance Spectroscopy (EIS) Method
|
|
Authors |
박장현(Jang-Hyun Park) ; 이한승(Han-Seung Lee) |
|
DOI |
https://doi.org/10.11112/jksmi.2017.21.1.083 |
|
Keywords |
전기화학적 임피던스 분광법 ; 부식거동 ; 철근 ; 콘크리트 ; 등가회로 ; 분극저항 Electreochemical impedance spectroscopy ; Corrosion behavior ; Rebar ; Concrete ; Equivalent circuit ; Polarization resistance |
|
Abstract |
The corrosion behavior of a rebar in concrete according to the amount of NaCl and LiNO2 was observed by using Electrochemical Impedance Spectroscopy. The corrosion was accelerated in a short time by using dry/wet cycles method, which is one of the corrosion acceleration methods, and though the value of measured impedance, equivalent circuit can be introduced. It was confirmed that the passive film of a embedded rebar in concrete with NaCl was broken quickly, and when 0.6M LiNO2 was added, the velocity of ongoing corrosion was declined considerably compared to the amount of NaCl. However, when 1.2M LiNO2 was added, it was confirmed that the passive film was not broken and its performance remained ,compared to the amount of NaCl.
|