Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution
The corrosion behavior and chloride threshold concentration of AISI 316L stainless steel reinforcement bar (rebar), subjected to high-energy shot peening (HESPed), are compared with its solution-annealed (SAed) counterpart in simulated concrete pore solution (CPS). X-ray diffraction (XRD) and transm...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424007592 |
| _version_ | 1797221747364200448 |
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| author | Sadegh Pour-Ali Soheil Mahdavi Samireh Moradi Reza Tavangar |
| author_facet | Sadegh Pour-Ali Soheil Mahdavi Samireh Moradi Reza Tavangar |
| author_sort | Sadegh Pour-Ali |
| collection | DOAJ |
| description | The corrosion behavior and chloride threshold concentration of AISI 316L stainless steel reinforcement bar (rebar), subjected to high-energy shot peening (HESPed), are compared with its solution-annealed (SAed) counterpart in simulated concrete pore solution (CPS). X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed that HESP significantly reduces the surface grain size to the ultrafine/nanometric range and increases the density of various dislocation structures, including dislocation walls and cells. This augmented presence of grain boundaries and dislocations, acting as high diffusivity paths, contributed to the formation of a thicker surface film with higher Cr content and lower donor/acceptor density in the HESPed sample compared to the SAed. Moreover, corrosion behavior analyses in CPSs with NaCl concentrations ranging from 0.0 to 2.0 M demonstrated that HESPed samples exhibit broader passivation ranges, more positive corrosion potentials, and higher polarization resistance under equivalent chloride concentrations. Additionally, threshold chloride concentrations obtained from the potentiodynamic polarization tests show values between 0.5 and 1.0 M for the SAed and between 1.0 and 1.5 M for the HESPed samples. Based on diffusion equations, a physical model is proposed to elucidate the improved behavior resulting from the HESP treatment. |
| first_indexed | 2024-04-24T13:10:21Z |
| format | Article |
| id | doaj.art-2446e8a228614d6d863912f90f39d914 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T13:10:21Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2446e8a228614d6d863912f90f39d9142024-04-05T04:40:53ZengElsevierJournal of Materials Research and Technology2238-78542024-05-013020512063Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solutionSadegh Pour-Ali0Soheil Mahdavi1Samireh Moradi2Reza Tavangar3Corresponding author.; Faculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, IranCorresponding author.; Faculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, IranFaculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, IranFaculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, IranThe corrosion behavior and chloride threshold concentration of AISI 316L stainless steel reinforcement bar (rebar), subjected to high-energy shot peening (HESPed), are compared with its solution-annealed (SAed) counterpart in simulated concrete pore solution (CPS). X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed that HESP significantly reduces the surface grain size to the ultrafine/nanometric range and increases the density of various dislocation structures, including dislocation walls and cells. This augmented presence of grain boundaries and dislocations, acting as high diffusivity paths, contributed to the formation of a thicker surface film with higher Cr content and lower donor/acceptor density in the HESPed sample compared to the SAed. Moreover, corrosion behavior analyses in CPSs with NaCl concentrations ranging from 0.0 to 2.0 M demonstrated that HESPed samples exhibit broader passivation ranges, more positive corrosion potentials, and higher polarization resistance under equivalent chloride concentrations. Additionally, threshold chloride concentrations obtained from the potentiodynamic polarization tests show values between 0.5 and 1.0 M for the SAed and between 1.0 and 1.5 M for the HESPed samples. Based on diffusion equations, a physical model is proposed to elucidate the improved behavior resulting from the HESP treatment.http://www.sciencedirect.com/science/article/pii/S2238785424007592AISI 316L stainless steel reinforcement barHigh-energy shot peeningCorrosion behaviorConcrete pore solutions (CPSs)Chloride threshold concentration |
| spellingShingle | Sadegh Pour-Ali Soheil Mahdavi Samireh Moradi Reza Tavangar Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution Journal of Materials Research and Technology AISI 316L stainless steel reinforcement bar High-energy shot peening Corrosion behavior Concrete pore solutions (CPSs) Chloride threshold concentration |
| title | Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution |
| title_full | Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution |
| title_fullStr | Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution |
| title_full_unstemmed | Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution |
| title_short | Effect of high-energy shot peening on the corrosion behavior and chloride threshold concentration of AISI 316L stainless steel rebar in simulated concrete pore solution |
| title_sort | effect of high energy shot peening on the corrosion behavior and chloride threshold concentration of aisi 316l stainless steel rebar in simulated concrete pore solution |
| topic | AISI 316L stainless steel reinforcement bar High-energy shot peening Corrosion behavior Concrete pore solutions (CPSs) Chloride threshold concentration |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424007592 |
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