From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM
Abstract Aluminum (Al) corrosion starts off at the micron or even submicron scale and if it is coating protected, it occurs at the metal‐coating interface. These corrosion events are by and large studied using bulk corrosion measurements making the understanding incomplete due to its micrometric sca...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-04-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400669 |
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| author | Vikram Singh Alban Morel Danick Gallant Janine Mauzeroll |
| author_facet | Vikram Singh Alban Morel Danick Gallant Janine Mauzeroll |
| author_sort | Vikram Singh |
| collection | DOAJ |
| description | Abstract Aluminum (Al) corrosion starts off at the micron or even submicron scale and if it is coating protected, it occurs at the metal‐coating interface. These corrosion events are by and large studied using bulk corrosion measurements making the understanding incomplete due to its micrometric scale occurrence. This gap is therefore targeted in current study by using a combination of SECM mapping modes together with a new strategy of employing redox‐mediator mixtures. These combinations allow the exploration of both Al surface topographic features as well as corrosion hotspots. Nine differently finished AAxxxx surfaces (namely, AA5083‐rolled‐Zr, AA6061‐rolled‐Zr, AA6061‐grinded‐Zr, AA6111‐rolled‐Zr, AA6111‐grinded‐Zr, AA7075‐grinded‐Zr, AA7075‐rolled‐Zr, AA7075‐rolled‐ZnPh with sealer and AA7075‐rolled‐ZnPh without sealer) are investigated by SECM in their as‐received state for corrosion and mapped on a 1 mm2 scale with high precision. The most interesting outcome is that typically grinded samples show more cathodic current and a higher number of hotspots. The resultant SECM maps are then quantified to extract corrosion hotspots and correlate them with both bulk corrosion outcomes and the real‐life corrosion road tests performed for 2 years. These investigations present a strong corrosion predictive strategy, which makes this study comprehensive and highly applicable to sectors like automobiles and aerospace) employing Al surfaces. |
| format | Article |
| id | doaj-art-a0f4e95c23384109a39df26b56efde57 |
| institution | OA Journals |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-a0f4e95c23384109a39df26b56efde572025-08-20T02:27:18ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-04-01128n/an/a10.1002/admi.202400669From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECMVikram Singh0Alban Morel1Danick Gallant2Janine Mauzeroll3Department of Chemistry McGill University Montreal Quebec H3A 0B8 CanadaAutomotive and Surface Transportation National Research Council Canada Saguenay Quebec G7H 8C3 CanadaAutomotive and Surface Transportation National Research Council Canada Saguenay Quebec G7H 8C3 CanadaDepartment of Chemistry McGill University Montreal Quebec H3A 0B8 CanadaAbstract Aluminum (Al) corrosion starts off at the micron or even submicron scale and if it is coating protected, it occurs at the metal‐coating interface. These corrosion events are by and large studied using bulk corrosion measurements making the understanding incomplete due to its micrometric scale occurrence. This gap is therefore targeted in current study by using a combination of SECM mapping modes together with a new strategy of employing redox‐mediator mixtures. These combinations allow the exploration of both Al surface topographic features as well as corrosion hotspots. Nine differently finished AAxxxx surfaces (namely, AA5083‐rolled‐Zr, AA6061‐rolled‐Zr, AA6061‐grinded‐Zr, AA6111‐rolled‐Zr, AA6111‐grinded‐Zr, AA7075‐grinded‐Zr, AA7075‐rolled‐Zr, AA7075‐rolled‐ZnPh with sealer and AA7075‐rolled‐ZnPh without sealer) are investigated by SECM in their as‐received state for corrosion and mapped on a 1 mm2 scale with high precision. The most interesting outcome is that typically grinded samples show more cathodic current and a higher number of hotspots. The resultant SECM maps are then quantified to extract corrosion hotspots and correlate them with both bulk corrosion outcomes and the real‐life corrosion road tests performed for 2 years. These investigations present a strong corrosion predictive strategy, which makes this study comprehensive and highly applicable to sectors like automobiles and aerospace) employing Al surfaces.https://doi.org/10.1002/admi.202400669aluminumcathodic reactivityconversion coatingrolled and grinded surfacescanning electrochemical microscopy |
| spellingShingle | Vikram Singh Alban Morel Danick Gallant Janine Mauzeroll From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM Advanced Materials Interfaces aluminum cathodic reactivity conversion coating rolled and grinded surface scanning electrochemical microscopy |
| title | From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM |
| title_full | From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM |
| title_fullStr | From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM |
| title_full_unstemmed | From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM |
| title_short | From Microscale to Road Scale: Bridging the Gaps of Predictive Aluminum Corrosion Using SECM |
| title_sort | from microscale to road scale bridging the gaps of predictive aluminum corrosion using secm |
| topic | aluminum cathodic reactivity conversion coating rolled and grinded surface scanning electrochemical microscopy |
| url | https://doi.org/10.1002/admi.202400669 |
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