Resonant loss and capture transition rates, distances of neutralization and total number of neutralized protons are calculated for different bound states (n = 2 to n = 6) of 25 keV protons scattered by an A1(111) surface. Due to the importance that the orientation of the orbital shows when these quantities are calculated, the perturbation introduced in the atomic levels by the image potential is analyzed for the level n = 2. First order perturbation theory and the specular reflection model with the surface plasmon pole approximation are used. The linear coefficient of the plasmon dispersion relation is calculated as a function of the distance from the jellium edge to the image plane. The transition rates and the equilibrium populations of the new eigenstates are presented as a function of the velocity of the protons, and compared with the results obtained for the unperturbated states.