Fig. 3

Comparison of corrosion in STS304 and STS316 according to electrical stimulation intensity, frequency, and time. The sections shaded gray indicate corrosion (○), and the section in white indicates no corrosion (X). No corrosion was observed in STS304 under any conditions with an intensity less than 3 and a duration less than 10 min, and no corrosion was observed in STS316 under any conditions with an intensity below 4 and a duration less than 15 min (except 60 Hz for 15 min). Based on the results above, STS316 is more resistant than STS304 to corrosion after the application of electrical pulses