| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1468588 | Corrosion Science | 2015 | 6 Pages |
•Effect of isothermal aging on the pitting corrosion resistance of UNS S82441 DSS was investigated.•Austenite phase shows a priority to be attacked by pits for the as-annealing specimen.•Pitting corrosion resistance of test specimens decreases with an increasing aging time.•Pits initiated in the chromium-depleted zones after aging.•The corrosion type evolves from pitting corrosion into general corrosion ultimately.
The effect of isothermal aging at 700 °C for various times on the pitting corrosion behavior of UNS S82441 duplex stainless steel was investigated using a combination of potentiodynamic polarization and potentiostatic critical pitting temperature techniques. The results show that the austenite phase of the as-annealed specimen is susceptible to pitting. With increasing aging time, the resistance of test specimens to pitting corrosion decreases. Additionally, pitting transfers from the austenite phase into chromium-depleted zones. Finally, the corrosion evolves from pitting corrosion into general corrosion as the holding time extends to 48 h.
