Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete
Most studies published to date on the corrosion behaviour of stainless reinforcing steel are based on austenitic steel. The market presence of corrugated duplex steel is growing, however. The present study compared passivity in 2205 type duplex and 304 type austenitic stainless steel. Polarization t...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Consejo Superior de Investigaciones Científicas
2007-12-01
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| Series: | Materiales de Construccion |
| Subjects: | |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/62 |
| _version_ | 1818672794753302528 |
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| author | A. Bautista G. Blanco F. Velasco A. Gutiérrez S. Palacín L. Soriano H. Takenouti |
| author_facet | A. Bautista G. Blanco F. Velasco A. Gutiérrez S. Palacín L. Soriano H. Takenouti |
| author_sort | A. Bautista |
| collection | DOAJ |
| description | Most studies published to date on the corrosion behaviour of stainless reinforcing steel are based on austenitic steel. The market presence of corrugated duplex steel is growing, however. The present study compared passivity in 2205 type duplex and 304 type austenitic stainless steel. Polarization tests in chloride-containing Ca(OH)2 solutions confirmed the exceptional performance of duplex steels. X-ray photoelectronic spectroscopy (XPS) showed that the passive layer generated on duplex stainless steel in media simulating concrete pore solutions had a higher Cr content than the layer formed on steel in contact with the air. The XPS results also revealed that in duplex steel the form adopted by the passive layer Fe oxides was Fe3O4 in the solutions simulating concrete, rather than Fe2O3, as in duplex steel exposed to air. Electrochemical impedance spectroscopy (EIS) can be used to monitor the transformations taking place in the passive layer and analyze the factors involved. |
| first_indexed | 2024-12-17T07:45:34Z |
| format | Article |
| id | doaj.art-f0162dc0957c463b9ccfecb2e8e7141e |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-17T07:45:34Z |
| publishDate | 2007-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-f0162dc0957c463b9ccfecb2e8e7141e2022-12-21T21:58:01ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262007-12-0157288173210.3989/mc.2007.v57.i288.6257Passivation of duplex stainless steel in solutions simulating chloride-contaminated concreteA. Bautista0G. Blanco1F. Velasco2A. Gutiérrez3S. Palacín4L. Soriano5H. Takenouti6Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química, Universidad Carlos III de MadridDepartamento de Ciencia e Ingeniería de Materiales e Ingeniería Química, Universidad Carlos III de MadridDepartamento de Ciencia e Ingeniería de Materiales e Ingeniería Química, Universidad Carlos III de MadridDepartamento de Física Aplicada. Universidad Autónoma de MadridDepartamento de Física Aplicada. Universidad Autónoma de MadridDepartamento de Física Aplicada. Universidad Autónoma de MadridUPR-15 du CNRS, UPMC, ParísMost studies published to date on the corrosion behaviour of stainless reinforcing steel are based on austenitic steel. The market presence of corrugated duplex steel is growing, however. The present study compared passivity in 2205 type duplex and 304 type austenitic stainless steel. Polarization tests in chloride-containing Ca(OH)2 solutions confirmed the exceptional performance of duplex steels. X-ray photoelectronic spectroscopy (XPS) showed that the passive layer generated on duplex stainless steel in media simulating concrete pore solutions had a higher Cr content than the layer formed on steel in contact with the air. The XPS results also revealed that in duplex steel the form adopted by the passive layer Fe oxides was Fe3O4 in the solutions simulating concrete, rather than Fe2O3, as in duplex steel exposed to air. Electrochemical impedance spectroscopy (EIS) can be used to monitor the transformations taking place in the passive layer and analyze the factors involved.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/62stainless steelchloridesreinforced concretecorrosionpassivation |
| spellingShingle | A. Bautista G. Blanco F. Velasco A. Gutiérrez S. Palacín L. Soriano H. Takenouti Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete Materiales de Construccion stainless steel chlorides reinforced concrete corrosion passivation |
| title | Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete |
| title_full | Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete |
| title_fullStr | Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete |
| title_full_unstemmed | Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete |
| title_short | Passivation of duplex stainless steel in solutions simulating chloride-contaminated concrete |
| title_sort | passivation of duplex stainless steel in solutions simulating chloride contaminated concrete |
| topic | stainless steel chlorides reinforced concrete corrosion passivation |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/62 |
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