Results
Galvanostatic polarization at 20 C
The values of Ecor, Ep and PRB, calculated from E-t curves are given in fig. 3. The Ecorr values for non-vibrating specimen appeared to be dependent on Cl- content. The Ecorr decreased from 300 to 150 mV when Cl- concentration increased from 150 to 350 mV (fig. 3a). When US vibration was applied to the specimen, the Ecorr showed higher scattering,mean values reduced to 0-30 mV and appeared to be less dependent on Cl- concentration (fig. 3d). Under the applied polarization the electrode potential Ep for both vibrating and non-vibrating specimens established between 300-400 mV showing no dependence on chloride concentration (fig. 3b,e). Calculated values of PRB for vibrating specimen (fig 3f) are at least 200 mV higher comparing to non-vibrating (fig. 3c). Thus, the application of US vibration to the stainless steel increases it's pitting resistance basis in 200 mV.