Pickling Behavior of Duplex Stainless Steel 2205 in Hydrochloric Acid Solution

Figure 4

SEM images of the oxide scales after immersion in the pickling electrolyte for 30 s (a), 60 s (b), and 90 s (c), respectively. The matrix after pickling (d) and EDS spectrums corresponding to points A (e) and B (f) in (a), respectively.