Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels
Localized plastic deformation has been observed to render nuclear reactor components more susceptible to stress corrosion cracking (SCC). However, it is not fully clear how localized strain impacts corrosion (oxidation) behavior. Herein, the surface reactivity and corrosion behavior of 304 L stainle...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521001672 |
| _version_ | 1818419568151887872 |
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| author | Xin Chen Maxim Gussev Magdalena Balonis Mathieu Bauchy Gaurav Sant |
| author_facet | Xin Chen Maxim Gussev Magdalena Balonis Mathieu Bauchy Gaurav Sant |
| author_sort | Xin Chen |
| collection | DOAJ |
| description | Localized plastic deformation has been observed to render nuclear reactor components more susceptible to stress corrosion cracking (SCC). However, it is not fully clear how localized strain impacts corrosion (oxidation) behavior. Herein, the surface reactivity and corrosion behavior of 304 L stainless steel specimens, deformed to different strain levels, was analyzed using advanced multimodal and multiscale methods. For the first time, we observed that localized deformation regions, e.g., deformation bands and α’-martensite featured smaller Volta potentials than the parent austenite matrix. This resulted in the establishment of localized corrosion potential gradients and the emergence of accelerated microscale galvanic corrosion. Particularly, regions that featured higher dislocation concentrations were more reactive on account of the reduction in the activation energy of corrosion due to the stored energy. The superposition of surface reactivity and strain distributions reveals that, SCC cracking is expected to initiate in regions of strain localization wherein micro-galvanic corrosion is favored. |
| first_indexed | 2024-12-14T12:40:38Z |
| format | Article |
| id | doaj.art-2132e31684514dc580a149eaf83ad1a5 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-14T12:40:38Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-2132e31684514dc580a149eaf83ad1a52022-12-21T23:00:56ZengElsevierMaterials & Design0264-12752021-05-01203109614Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steelsXin Chen0Maxim Gussev1Magdalena Balonis2Mathieu Bauchy3Gaurav Sant4Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Institute for Carbon Management (ICM), University of California, Los Angeles, CA, USA; Corresponding authors at: Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA.Oak Ridge National Laboratory, Oak Ridge, TN, USADepartment of Materials Science and Engineering, University of California, Los Angeles, CA, USAPhysics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, US; Institute for Carbon Management (ICM), University of California, Los Angeles, CA, USALaboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA; California Nanosystems Institute (CNSI), University of California, Los Angeles, CA, USA; Institute for Carbon Management (ICM), University of California, Los Angeles, CA, USA; Corresponding authors at: Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA.Localized plastic deformation has been observed to render nuclear reactor components more susceptible to stress corrosion cracking (SCC). However, it is not fully clear how localized strain impacts corrosion (oxidation) behavior. Herein, the surface reactivity and corrosion behavior of 304 L stainless steel specimens, deformed to different strain levels, was analyzed using advanced multimodal and multiscale methods. For the first time, we observed that localized deformation regions, e.g., deformation bands and α’-martensite featured smaller Volta potentials than the parent austenite matrix. This resulted in the establishment of localized corrosion potential gradients and the emergence of accelerated microscale galvanic corrosion. Particularly, regions that featured higher dislocation concentrations were more reactive on account of the reduction in the activation energy of corrosion due to the stored energy. The superposition of surface reactivity and strain distributions reveals that, SCC cracking is expected to initiate in regions of strain localization wherein micro-galvanic corrosion is favored.http://www.sciencedirect.com/science/article/pii/S0264127521001672Passive filmCorrosionSECMEISInterface charge transfer |
| spellingShingle | Xin Chen Maxim Gussev Magdalena Balonis Mathieu Bauchy Gaurav Sant Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels Materials & Design Passive film Corrosion SECM EIS Interface charge transfer |
| title | Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels |
| title_full | Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels |
| title_fullStr | Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels |
| title_full_unstemmed | Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels |
| title_short | Emergence of micro-galvanic corrosion in plastically deformed austenitic stainless steels |
| title_sort | emergence of micro galvanic corrosion in plastically deformed austenitic stainless steels |
| topic | Passive film Corrosion SECM EIS Interface charge transfer |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521001672 |
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