2021
DOI: 10.1149/1945-7111/abf50d
|View full text |Cite
|
Sign up to set email alerts
|

Editors’ Choice—Dealloying-Driven Cerium Precipitation on Intermetallic Particles in Aerospace Aluminium Alloys

Abstract: Cerium-based compounds have been studied for decades as non-toxic candidates for the protection of aerospace aluminium alloys (AAs) like AA2024-T3. However, the complex heterogeneous microstructure of these alloys has hindered a thorough understanding of the subsequent stages of corrosion protection provided by this class of inhibitors. Thus, this work is devoted to unravelling the interaction mechanisms of different intermetallic particles (IMPs) in AA2024-T3 with cerium nitrate at the nanoscopic scale. This … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1

Citation Types

0
15
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
7

Relationship

0
7

Authors

Journals

citations
Cited by 19 publications
(15 citation statements)
references
References 41 publications
0
15
0
Order By: Relevance
“…The magnesium in the Al 2 CuMg strongly determines its dissolution behavior in chloride solutions; it is selectively dissolved, leaving the IMP enriched in Cu. 48,60 In DHS, MgZn 2 was the only IMC that did not have a potential range that established a passive region (ΔE) in the anodic curve. For Al-Cu-containing IMCs ΔE spanned between 230 mV and 380 mV (Fig.…”
Section: Resultsmentioning
confidence: 99%
See 3 more Smart Citations
“…The magnesium in the Al 2 CuMg strongly determines its dissolution behavior in chloride solutions; it is selectively dissolved, leaving the IMP enriched in Cu. 48,60 In DHS, MgZn 2 was the only IMC that did not have a potential range that established a passive region (ΔE) in the anodic curve. For Al-Cu-containing IMCs ΔE spanned between 230 mV and 380 mV (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The thickness of the precipitates depends on the type of IMP. 40,48 It was shown recently that deposition of the Ce-rich layer initiates at large Cu-containing Al(Fe,Cu)Si IMPs and proceeds to grow laterally across the surface. Dealloying of IMPs was found to be the governing mechanism for the precipitation of large Ce-rich deposits; the outward dissolution of Al and Mg and simultaneous precipitation of Ce led to the formation of a mixed Ce-Al hydroxide.…”
mentioning
confidence: 99%
See 2 more Smart Citations
“…For the Al-Zn-Mg-Cu alloys, the coarse residual phases (M/T/S) along grain boundaries (mostly) or in the matrix (few) may highly affect the corrosion resistance. On the one hand, they may act as a typical ''variable polarity" phase to form the corrosion electrochemical microcell due to the active Mg/Zn atoms with the cathode matrix and the dealloying reaction [88,89], leading to the dissolution of active Mg/Zn atoms and the remaining Cu-enriched phase in the initial anode sites. As such, the electrochemical activity of the residual Cu-enriched phase is reduced and become noble relative to the surrounding active grain boundaries or the matrix, and this residual Cu-enriched phase can further act as the cathode together with the anodic grain boundaries and/or matrix to form the electrochemical microcell and promote the dissolution or pitting/intergranular corrosion [88,89].…”
Section: Confirming the Principles With Classical High-strength Alumi...mentioning
confidence: 99%