In this study, Corrosion behavior in mortar was observed by the passage of time by using EIS method. As a result of EIS experiment, equivalent circuit and changes of Impedance parameter could be observed. In addition, it was confirmed that impedance of rebar in concrete and corrosion rate according to the amount of NaCl and LiNO2 were different.

In this study, corrosion potential (Ecorr), corrosion rate, and polarization resistance were measured aimed at inorganic inhibitors (passive film type) and organic inhibitors (absorption type). The experiment was conducted using potentiostat for the variable molar ratio and chloride ion concentration of the components of inhibitors in an aqueous solution of saturated calcium hydroxide targeting corrosion. As a result, it was possible to ensure an anticorrosive performance of at least a 1.2 molar ratio of inorganic inhibitors. Also, the organic inhibitors ensured the prevention of the anticorrosive performance of at least about a 0.3 molar ratio. It also showed the tendency that between polarization resistance and corrosion rate, Ecorr and corrosion rate is inversely proportional to the linear. Conversely, the tendency between polarization resistance and Ecorr is proportional to the linear. Also, a distinct difference in organic and inorganic inhibitors’ relationship to Ecorr, corrosion rate, and polarization resistance was not shown.

In this study, in order to comprehend performance of corrosion inhibitor, the experiment study was conducted about corrosion characteristic 3 steps(0.0, 0.6, 1.2) of Chloride by added amount of inorganic(Ca(NO2)2) and organic(DMEA) corrosion inhibitor by the corrosion inhibitor types about 0.6kg/m3, 2.4kg/m3 based on Chloride ion content 1.2kg/m3 for service life prediction of concrete structure by using Poteniostat. As a results, the excellent anti-corrosive performance of organic corrosion inhibitor was seen that absorption types organic corrosion inhibitor has excellent anti-corrosive performance compared to the inorganic nitrous acid corrosion inhibitor by the added amount of corrosion inhibitor

In this study, in order to comprehend performance of corrosion inhibitor, the experiment study was conducted about corrosion characteristic of 3 steps(0.0, norm 1/2, norm) compared to organic corrosion inhibitor standard use of liquid and molar 3 steps(0.0, 0.3, 0.6%) of Chloride by added amount of inorganic corrosion inhibitor by the corrosion inhibitor types about 2.4kg/m3, 4.8kg/m3 based on Chloride ion content 1.2kg/m3 for service life prediction of concrete structure by using Poteniostat.

철근이 부식되면 오염된 콘크리트를 제거하고 철근방식을 하고 보수하는 방법과 방청제를 도포하는 방법으로는 철근위치에서 방청성능을 확보하기가 곤란한 실정이다. 이에 본 연구에서는 철근위치까지 방청제를 고압 침투시키기 위한 연구개발에 앞서 방청제 가압 침투 실험을 통하여 침투깊이를 측정하고 위치별 아질산이온의 양을 측정하여 물시멘트비, 압력, 가압시간에 따른 침투깊이 예측하고 우수한 방청성을 가지는 염화물이온과 아질산이온의 몰비 0.6 이상이 되는 물시멘트비와 압력, 가압시간을 산정하였다. 실험결과 물시멘트비가 방청제의 침투에 가장 큰 영향을 주며 또한 실험체의 깊이가 깊어질수록 침투시킨 방청제의 농도는 같지 않고 낮아지는 것을 알 수 있었다.