## 3 Results and Discussion  
### Corrosion Potential (E\({}_{corr}\)) Results  
Figure 3 shows the corrosion potential results obtained for the re-bars without inhibitors when embedded in concretes with chloride ion percentages of 0.0%, 0.4%, 0.8%, 1.2%, 1.6%, and 2.0%. For concretes without chlorides, and with a chloride ion percentage of 0.4% by weight of cement, and containing re-bars without inhibitor, all the analyzed re-bars presented an associated corrosion risk of less than 10.0% throughout the analyzed period, as can be seen in Figure 3a,b. A percentage of 0.4% chloride ion by weight of cement is considered the limit before corrosion is triggered in re-bars [54]. For chloride ion percentages of 0.8% and above, all the re-bars showed an associated corrosion risk of more than 90%, as has been stated by other authors [54]. In most of the re-bars, the potentials evolved towards more negative values over time, reaching corrosion potentials of between \(-400\) and \(-500\) mV at the end of the test, as can be appreciated in Figure 3c-f. Figure 4 shows the results of the corrosion potentials for re-bars with inhibitors when embedded in concretes with chloride ion percentages of 0.0%, 0.4%, 0.8%, 1.2%, 1.6%, and 2.0%. For chloride ion percentages of 0.0% and 0.4%, shown in Figure 4a,b, practically all re-bars exhibit a constant corrosion potential over time, which is characteristic of corrosion probabilities above 90%. For chloride ion percentages of 0.8% and 1.2%, the corrosion potentials evolve towards more negative values over time, with about half of the re-bars showing potentials that indicate an uncertain risk of corrosion by the end of the test. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Level of Corrosion** & **T (mm/Year)** & **i\({}_{\text{corr}}\) (\(\mu\)A/cm\({}^{2}\))** \\ \hline Passive state & \(<\)0.001 & \(<\)0.1 \\ Moderate & 0.001–0.005 & 0.1–0.5 \\ High & 0.005–0.01 & 0.5–1 \\ Active state & \(>\)0.01 & \(>\)1 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Intervals of corrosion current values associated with the durability of the reinforcement. \begin{table}
\begin{tabular}{c c} \hline \hline
**Corrosion Risk** & **Reference Electrode (Ag/AgCl)** \\ \hline Passivity (10\%) & E\({}_{\text{corr}}\)\(>-81\) mV \\ Intermediate & \(-81\) mV \(>\) E\({}_{\text{corr}}\)\(>-231\) mV \\ High (\(>\)90\%) & E\({}_{\text{corr}}\)\(<-231\) mV \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Corrosion risk, according to E\({}_{\text{corr}}\). For chloride ion percentages of 1.6%, shown in Figure 4e, and 2.0%, shown in Figure 4f, all re-bars at the end of the test show corrosion potentials which indicate that all re-bars are at a risk of corrosion above 90%. Comparing the results obtained for corrosion potentials in re-bars with and without inhibitor, it is evident that for chloride ion percentages of 1.6% and 2.0%, the results are very similar. For chloride ion percentages of 0.0% and 0.4%, the re-bars without inhibitor exhibit fewer negative potentials than those with inhibitor. For chloride ion percentages of 0.8% and 1.2%, the potentials of the re-bars with inhibitor are less negative than in the case of re-bars without inhibitor. Figure 3: Corrosion potential (E\({}_{\text{corr}}\)) in re-bars without inhibitor and in concretes with different percentages of chloride ion. (**a**) 0.0%, (**b**) 0.4%, (**c**) 0.8%, (**d**) 1.2%, (**e**) 1.6%, and (**f**) 2.0%. Corrosion Rate Results (\(i_{corr}\)) in Re-Bars with and without Inhibitor, Incorporated into Concretes with Different Percentages of Chloride Ion  
Figure 5 presents the corrosion rate results for re-bars without inhibitor embedded in concretes with 0.0%, 0.4%, 0.8%, 1.2%, and 1.6% chloride. In the initial condition without chlorides, shown in Figure 5a, the measured values are in a passive state. Increasing the chloride percentage to 0.4% resulted in an increase in corrosion rate, exceeding the threshold of 0.1 uA/cm\({}^{2}\).