Two different electrochemical methods confirm the influence of the ligth on the anodic current values. Observe when low carbon steel electrodes were polarized in deaerated 1.0 N H2SO4 solutions in the anodic potential range. The highest density values were obtained when the system is under illumination. The effect of natural illumination conditions on the weigh-loss experiments in aerated 1.0 N H2SO4, confirms that the corrosion rate is higher in an illuminated medium than in the dark.
