The influence of ultrasound vibration on pitting corrosion suppression of AISI 316 stainless steel was investigated using galvanostatic polarization and weight-loss techniques in Cl-containing solutions at 20 and 50 C. SEM surface analysis was performed after anodic treatment. Both galvanostatic polarization and weight-loss revealed efficient pitting corrosion suppression when US vibration (28 kHz) is applied to a stainless steel. The pitting resistance basis in increased in 100 mV and the weight of dissolved metal in 4-6 times lower under the US influence.