Ageing effects on α′ precipitation and resistance to corrosion of a novel Cr-Mo stainless steel with high Mo content
The consequences of ageing at 400 and 475 C on a0 precipitation and corrosion resistance of a novel Cr–Mo ferritic SS with high Mo content were investigated. Combination of X-ray diffraction and Mo¨ssbauer spectroscopy results indicates the appearance of a small amount of a paramagnetic phase as a r...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | Brasil |
| Recursos: | Universidade Federal do Ceará (UFC) |
| Repositorio: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufc.br:riufc/66925 |
| Acesso em linha: | http://www.repositorio.ufc.br/handle/riufc/66925 |
| Access Level: | acceso abierto |
| Palavra-chave: | Stress Corrosion Crack Duplex stainless steel Distillation Tower Ferritic stainless steel Paramagnetic Phase |
| Resumo: | The consequences of ageing at 400 and 475 C on a0 precipitation and corrosion resistance of a novel Cr–Mo ferritic SS with high Mo content were investigated. Combination of X-ray diffraction and Mo¨ssbauer spectroscopy results indicates the appearance of a small amount of a paramagnetic phase as a result of the ageing. This phase is iso-structural with the a phase and is thus associated with a Cr-rich a0 phase. The appearance of this phase is related to a decrease of the resistance to corrosion as studied by DL-EPR because the presence of this paramagnetic phase leads to discontinuities in the oxide layer thus reducing corrosion protection and exposing the steel to the action of the corrosive solution. |
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