Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

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Ornek C., Leonard F., McDonald S. A., Prajapati A., Withers P. J., Engelberg D. L.

NPJ MATERIALS DEGRADATION, cilt.2, sa.1, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2 Sayı: 1
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1038/s41529-018-0030-9
  • Dergi Adı: NPJ MATERIALS DEGRADATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

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 degrees C (12-15 M Cl(-)and pH similar to 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.