## 3 Results
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Immersion Solution**} & \multicolumn{8}{c}{**Immersion Time (Days)**} \\ \cline{2-9}  & **O** & **10** & **15** & **20** & **30** & **45** & **60** & **90** \\ \hline \multicolumn{9}{c}{**Carbon Laminates**} \\ \hline Diesel & 21.3 (1.16) & - & 19.7 (0.68) & - & 18.6 (1.32) & 18.1 (0.49) & - & - \\ \hline H\({}_{2}\)SO & 21.3 (1.16) & 20.2 (1.26) & - & 18.1 (1.45) & 17.3 (1.36) & - & - & - \\ \hline HCl & 21.3 (1.16) & 18.3 (1.23) & - & 16.7 (1.17) & 16.3 (1.40) & - & - & - \\ \hline NaOH & 21.3 (1.16) & 17.7 (1.09) & - & 15.8 (1.15) & 13.8 (1.30) & - & - & - \\ \hline Distilled water & 21.3 (1.16) & - & 18.3 (1.09) & - & 16.5 (1.30) & - & 15.7 (1.03) & 14.9 (1.10) \\ \hline Seawater & 21.3 (1.16) & - & 18.6 (1.31) & - & 17.0 (1.07) & - & 16.2 (1.44) & 15.5 (1.32) \\ \hline Seawater at 60 \({}^{\circ}\)C & 21.3 (1.16) & - & 18.0 (1.49) & - & 16.4 (1.72) & 15.8 (1.68) & - & - \\ \hline \multicolumn{9}{c}{**Carbon Laminates with Cork**} \\ \hline Diesel & 16.6 (0.72) & - & 15.7 (0.41) & - & 15.1 (0.63) & 14.7 (0.56) & - & - \\ \hline H\({}_{2}\)SO & 16.6 (0.72) & 16.0 (1.11) & & 15.5 (1.35) & 15.4 (0.72) & - & - & - \\ \hline HCl & 16.6 (0.72) & 15.9 (0.87) & - & 15.3 (0.46) & 14.5 (0.71) & - & - & - \\ \hline NaOH & 16.6 (0.72) & 14.4 (1.09) & - & 13.2 (1.16) & 11.9 (1.30) & - & - & - \\ \hline Distilled water & 16.6 (0.72) & - & 14.2 (1.28) & - & 13.4 (1.00) & - & 12.9 (1.40) & 12.1 (1.31) \\ \hline Seawater & 16.6 (0.72) & - & 14.4 (1.07) & - & 13.6 (1.51) & - & 13.1 (1.39) & 12.8 (1.26) \\ \hline Seawater at 60 \({}^{\circ}\)C & 16.6 (0.72) & - & 14.2 (1.21) & - & 13.1 (1.42) & 12.6 (1.33) & - & - \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Restored energy obtained for the different harsh solutions and immersion time (values in %). \begin{table}
\begin{tabular}{c c c} \hline \hline \multicolumn{1}{c}{**Solutions**} & **Matrix with Cork Powder (\%)** & **Neat Resin (\%)** \\ \hline Diesel & 9.0 & 12.7 \\ Sulphuric acid (H\({}_{2}\)SO\({}_{4}\)) & 7.2 & 18.8 \\ Hydrochloric acid (HCI) & 12.7 & 23.5 \\ Sodium hydroxide (NaOH) & 28.3 & 35.2 \\ Distilled water & 19.3 & 22.5 \\ Sea water at room temperature & 18.1 & 20.2 \\ Sea water at 60 \({}^{\circ}\)C & 21.1 & 23.0 \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Difference between the restored energy obtained after 30 days of immersion into different harsh solutions compared to that obtained with non-immersed specimens. were found by [PERSON] et al. [19] when an epoxy matrix was filled with cork powder. On the other hand, lower values of restored energy are the consequence of higher damaged area. According to [PERSON] et al. [24], there is an interaction between matrix cracking caused by exposure to hostile solutions and the delamination of composite laminates when subjected to low velocity impact. These cracks interact with delaminations and, in this context, contribute to increase the damaged area (consequently the elastic energy decreases) [24]. Resulting from microcracks produced in the matrix by hostile solutions, [PERSON] et al. [24] observed an increase in roughness on laminate surfaces with exposure time, which presented the highest values for samples immersed into NaOH solutions. Simultaneously, the ultramicroindentation tests performed by these authors showed a decrease in the mechanical properties of the matrix [24]. For example, the decrease in the matrix Young's modulus promoted by corrosive solutions associated with the degradation of the fibre-matrix interface explained the lower bending properties obtained by the authors. In other studies, an important effect of the defect size on the maximum load was observed (which decreases with increasing the defect size) and the plate deflection is shown to be proportional to the bending stiffness [59; 60]. Therefore, according to [PERSON] et al. [47], both the degradation of the matrix-fibre interface and the mechanical properties of the matrix considerably affect the load carrying capacity of the material.