Corrosion rates of strained grade UNS S32202 (2202) and UNS S32205 (2205) duplex stainless steel wires have been measured, in situ, using time-lapse X-ray computed tomography. Exposures to chloride-containing (MgCl2) atmospheric environments at 50 °C (12–15M Cl− and pH ~5) with different mechanical elastic and elastic/plastic loads were carried out over a period of 21 months. The corrosion rates for grade 2202 increased over time, showing selective dissolution with shallow corrosion sites, coalescing along the surface of the wire. Corrosion rates of grade 2205 decreased over time, showing both selective and pitting corrosion with more localised attack, growing preferentially in depth. The nucleation of stress corrosion cracking was observed in both wires.
|Journal||n p j Materials Degradation|
|Early online date||7 Mar 2018|
|Publication status||Published - 7 Mar 2018|
- Duplex Stainless Steel
- Scanning electron microscope
- Effects of strain
- Pitting corrosion
- Stress Corrosion Cracking
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Performance Characterisation of Duplex Stainless Steel in Nuclear Waste Storage EnvironmentAuthor: Ornek, C., 1 Aug 2016
Supervisor: Engelberg, D. (Supervisor)
Student thesis: PhdFile