Galvanostatic polarization at 50 C
Galvanostatic tests were performed at elevated temperature - 50 C. The series of E-t were measured and corresponding parameters Ecorr, Ep and PRB are given in fig. 4. The temperature had little influence on Ec values for both vibrating and non-vibrating specimens (fig. 4a,d). The values of Ec are located between 150-200 mV without ultrasound application and between -20 - +50 mV with US. At applied anodic current for both cases similar dependences were obtained, however with applied US the Ep values are 50 mV lower. Similar to 20 C, the application of US increases scattering of results. Calculated values of PRB are found to be at least 100 mV higher for vibrating plate. So, the application of US increases the pitting resistance of stainless steel on 100 mV, however the rise of temperature reduces the pitting suppression effisiency of US vibration.