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Anodisation of alum...
Anodisation of aluminium alloy AA7075 – Influence of intermetallic particles on anodic oxide growth
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- Zhang, Fan (författare)
- KTH,Yt- och korrosionsvetenskap
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- Örnek, Cem (författare)
- KTH,Yt- och korrosionsvetenskap
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Nilsson, J. -O (författare)
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Pan, J. (författare)
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(creator_code:org_t)
- Elsevier Ltd, 2020
- 2020
- Engelska.
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Ingår i: Corrosion Science. - : Elsevier Ltd. - 0010-938X .- 1879-0496. ; 164
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Microstructure and Volta-potential analyses were conducted to characterise intermetallic-particles (IMPs) in AA7075-T5. EIS and AFM were applied under operando-conditions to investigate anodisation processes. IMPs have pronounced influence on the growth of anodic aluminium oxide (AAO) films resulting in low charge-transfer resistance. Cu-bearing constituents show cathodic-character, whereas Mg2Si and MgZn2 particles show anodic-character. During anodisation, Al7Cu2Fe remain stable with peripheral-dissolution around boundary. De-alloying of S-phase particles leads to the detachment. Mg2Si undergoes de-alloying at low potential, and re-passivation at high potential. MgZn2 dissolves entirely upon anodization. Localised-dissolution in large-IMPs boundaries or nanometre-sized IMPs facilitates bubble evolution, confirming local breakdown of barrier-layer.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- Anodization
- In-situ EC-AFM
- Intermetallic particles
- Localised dissolution
- Operando EIS
- SKPFM
- Alloying
- Alumina
- Aluminum alloys
- Aluminum oxide
- Anodic oxidation
- Binary alloys
- Charge transfer
- Dealloying
- Dissolution
- Intermetallics
- Iron alloys
- Oxide films
- Silicon alloys
- Ternary alloys
- Anodizations
- Inter-metallic particle
- Localised
- Operando
- Magnesium alloys
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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