|
Corrosion Behaviour of High Phosphorus Containing Cu-Cr Weather Resistant Steel |
|---|---|
| รหัสดีโอไอ | |
| Creator | Gadadhar SAHOO,Anjana DEVA,Balbir SINGH,Atul SEXENA |
| Title | Corrosion Behaviour of High Phosphorus Containing Cu-Cr Weather Resistant Steel |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2557 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 24 |
| Journal No. | 2 |
| Page no. | 1-8 |
| Keyword | Tensile properties,Impact energy,Hot ductility,EIS,Impedance,Rust |
| ISSN | 8576149 |
| Abstract | Three steels viz., G22(Fe-0.072C-0.028 Si-0.20Mn-0.19P-0.38Cr-0.24Cu-0.17Ni), G32(Fe-0.072C-0.061 Si-0.23 Mn-0.19P-0.64Cr-0.14Cu) and SCOR (Fe-0.09C-0.37Si-0.42Mn-0.15P-0.37Cr-0.35Cu-0.31Ni)were made through ingot metallurgy route and hot rolled to 3 mm thick sheets. Tafel extrapolation study offreshly ground samples in 3.5% NaCl solution revealed similar corrosion rates for all steels. Other techniqueemployed to evaluate the effect of phosphorus on the formation of protective rust layer was electrochemicalimpedance spectroscopy (EIS) test after exposing the samples in an atmospheric exposure rack for fourmonths on the roof top of a fourth floored building. Results revealed that the polarization resistance or rustresistance of G22 and SCOR steels were comparable and similar to that of a reference steel SAILCOR (Fe-0.07C-0.48 Si-0.31Mn-0.118P-0.41Cr-0.32Cu-0.21Ni), which is produced at Bokaro Steel plant. The role ofphosphorus in improving atmospheric corrosion resistance was understood from this study. |
