Simulation of the Relaxation Potential Profile of an ac-dc-ac Test

Figure 2

Metal potential as a function of current density for uncoated Al in a deaerated 0.1 M NaCl electrolyte. The graphs associated with pH 7, 12, and 13 were constructed using the parameters listed in Table 1. The dashed lines represent the metal potential and current density relationships for (i) uncoated Al and (ii) coated Al at an open circuit condition for the pH range of 7 to 13.