| Titre : | Influence of cold work and sigma phase on the pitting corrosion behavior of 25 chromium super duplex stainless steel in 3.5% sodium chloride solution (2010) |
| Auteurs : | A. Elhoud, Auteur ; H. Ezuber, Auteur ; W. Deans, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Materials and corrosion (Vol. 61 N° 3, Mars 2010) |
| Article en page(s) : | pp. 199–204 |
| Note générale : | Génie mécanique |
| Langues : | Anglais |
| Tags : | 25 chromium SDSS ; cold work ; pitting corrosion ; sigma phase |
| Résumé : | The effect of cold work (up to 16% strain) and sigma phase precipitation (at 850 °C for 10 and 60 min) on the pitting resistance of 25 chromium super duplex stainless steel were investigated in 3.5% sodium chloride solution at 70 and 90 °C. Anodic polarization scans for cold worked samples revealed immunity to pitting attack at 70 °C even with 16% strain. At 90 °C, the alloy still showed high pitting resistance, pitting occurring at about 600 mV (SCE) for the 16% plastic strain samples. A serious deterioration of the pitting corrosion resistance was found after heating the alloy at 850 °C for 10 min resulting in a clear drop in the pitting potential at 90 °C. After heating for 60 min, the material showed rapid deterioration of pitting corrosion resistance at 70 °C. |
| En ligne : | http://onlinelibrary.wiley.com/doi/10.1002/maco.200905312/abstract |
