True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel
Laser powder bed fusion (LPBF) additively manufactured (AM) 316L stainless steels (SS) possess much more complex surfaces than their wrought counterparts which affects the corrosion behavior. Surface roughness, a typical metric for assessing corrosion of conventionally manufactured metals, is often...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523009759 |
| _version_ | 1797347797436989440 |
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| author | Seongkoo Cho Steven F. Buchsbaum Monika Biener Justin Jones Michael A. Melia Jamie A. Stull Hector R. Colon-Mercado Jonathan Dwyer S. Roger Qiu |
| author_facet | Seongkoo Cho Steven F. Buchsbaum Monika Biener Justin Jones Michael A. Melia Jamie A. Stull Hector R. Colon-Mercado Jonathan Dwyer S. Roger Qiu |
| author_sort | Seongkoo Cho |
| collection | DOAJ |
| description | Laser powder bed fusion (LPBF) additively manufactured (AM) 316L stainless steels (SS) possess much more complex surfaces than their wrought counterparts which affects the corrosion behavior. Surface roughness, a typical metric for assessing corrosion of conventionally manufactured metals, is often ineffective as an independent parameter in characterizing corrosion of the AM metals for their higher surface roughness ranging from 5 to 50 µm. This study experimentally shows that the true active surface area (ATA) is a proper parameter for quick assessment of localized corrosion response of AM 316L SS. Through the potentiodynamic polarization testing on surrogates under full immersion in 0.6 M NaCl solution, the pitting corrosion susceptibility was evaluated. While no consistent correlation to surface roughness was displayed, the pitting breakdown potential (Ep) showed a clear statistical trend at 1/ATA0.5. In addition, normalization of the polarization resistance with the ATA reveals the corresponding surface roughness did not significantly affect the change in open-circuit corrosion phenomenon. This correlation fits well with a previously reported stochastic pitting model on metal surfaces. The results suggest that the importance of ATA as a predictor for predisposition to corrosion in AM 316L SS extends far beyond what has been established for wrought materials. |
| first_indexed | 2024-03-08T11:54:04Z |
| format | Article |
| id | doaj.art-1bb3b0f3f6154b12ad093f6e5d51eddc |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-08T11:54:04Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-1bb3b0f3f6154b12ad093f6e5d51eddc2024-01-24T05:16:23ZengElsevierMaterials & Design0264-12752024-01-01237112559True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steelSeongkoo Cho0Steven F. Buchsbaum1Monika Biener2Justin Jones3Michael A. Melia4Jamie A. Stull5Hector R. Colon-Mercado6Jonathan Dwyer7S. Roger Qiu8Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, United StatesLawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, United StatesLawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, United StatesLawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, United StatesSandia National Laboratories, 1515 Eubank Blvd., SE, Albuquerque, NM 87123, United StatesLos Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, United StatesSavannah River National Laboratory, 999-2W, Aiken, SC 29808, United StatesKansas City National Security Campus, 14520 Botts Rd, Kansas City, MO 64147, United StatesLawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, United States; Corresponding author.Laser powder bed fusion (LPBF) additively manufactured (AM) 316L stainless steels (SS) possess much more complex surfaces than their wrought counterparts which affects the corrosion behavior. Surface roughness, a typical metric for assessing corrosion of conventionally manufactured metals, is often ineffective as an independent parameter in characterizing corrosion of the AM metals for their higher surface roughness ranging from 5 to 50 µm. This study experimentally shows that the true active surface area (ATA) is a proper parameter for quick assessment of localized corrosion response of AM 316L SS. Through the potentiodynamic polarization testing on surrogates under full immersion in 0.6 M NaCl solution, the pitting corrosion susceptibility was evaluated. While no consistent correlation to surface roughness was displayed, the pitting breakdown potential (Ep) showed a clear statistical trend at 1/ATA0.5. In addition, normalization of the polarization resistance with the ATA reveals the corresponding surface roughness did not significantly affect the change in open-circuit corrosion phenomenon. This correlation fits well with a previously reported stochastic pitting model on metal surfaces. The results suggest that the importance of ATA as a predictor for predisposition to corrosion in AM 316L SS extends far beyond what has been established for wrought materials.http://www.sciencedirect.com/science/article/pii/S0264127523009759True active surfaceAdditive manufacturing316L stainless steelSurface roughnessCorrosion |
| spellingShingle | Seongkoo Cho Steven F. Buchsbaum Monika Biener Justin Jones Michael A. Melia Jamie A. Stull Hector R. Colon-Mercado Jonathan Dwyer S. Roger Qiu True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel Materials & Design True active surface Additive manufacturing 316L stainless steel Surface roughness Corrosion |
| title | True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel |
| title_full | True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel |
| title_fullStr | True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel |
| title_full_unstemmed | True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel |
| title_short | True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel |
| title_sort | true active surface area as a key indicator of corrosion behavior in additively manufactured 316l stainless steel |
| topic | True active surface Additive manufacturing 316L stainless steel Surface roughness Corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523009759 |
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