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In situ investigation of crevice corrosion on UNS S32101 duplex stainless steel in sodium chloride solution |
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| Affiliation: | 1. Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, No. 7, Pardis St., Mollasadra Av., Vanak, Tehran, Iran;2. Faculty of Research and Development of Energy and Environment, Research Institute of Petroleum Industry (RIPI), West side of Azadi Complex, Tehran, Iran;1. Universidade Federal Fluminense, Departamento de Engenharia Mecânica, Rua Passo da Pátria, 156, CEP 24210-240 Niterói, Brazil;2. Centro Federal de Educação Celso Sucow, Pós-Graduação em Ciências dos Materiais, Rio de Janeiro, Brazil;3. Escola Técnica Estadual Ferreira Vianna, FAETEC, Rio de Janeiro, Brazil;4. Pontifícia Universidade Católica do Rio de Janeiro, Departamento de Engenharia Mecânica, Brazil;5. Pontifícia Universidade Católica do Rio de Janeiro, Instituto Tecnológico, Rio de Janeiro, Brazil |
| Abstract: | The crevice corrosion of UNS S32101 in neutral 0.1 M NaCl solutions at room temperature was investigated directly by a facile method. Experimental results showed that both delayed and immediate crevice corrosion can be initiated. Morphology study indicated that the heaviest corrosion attack happened just below the passive/active boundary on the crevice wall. The relocation of the active dissolution regions during crevice corrosion was observed and explained by established theory. The mechanisms of the delayed and immediate types of crevice corrosion on UNS S32101 duplex stainless steel were discussed. |
| Keywords: | A Stainless steel B Polarization B SEM C Crevice corrosion |
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