Enhancement of the cerium oxide primer layers deposited on AA2024-T3 aircraft alloy by preliminary Enhancement of the cerium oxide primer layers deposited on AA2024-T3 aircraft alloy by preliminary anodization

Abstract

<p class="PaperAbstract"><span lang="EN-US">The possibility for combination between Anodized Aluminum Oxide (AAO) and Cerium Oxide Primer Layer (CeOPL) for elaboration of efficient protective coatings for AA2024-T3 aircraft alloy is proposed in the present research. The combined AAO/CeOPL coating characterizations include Electrochemical Impedance Spectroscopy (EIS) combined with Linear Voltammetry (LVA), for extended times (until 2520 hours) to a model corrosive medium (3.5% NaCl). Topographical and cross-sectional (SEM and EDX) observations were performed in order to determine the AAO/CeOPL film thickness and composition. The AAO/CeOPL layer durability tests were confirmed by standard Neutral Salt Spray (NSS). The data analysis from all the used measurement methods has undoubtedly shown that the presence of AAO film significantly improves the cerium oxide primer layer (CeOPL) protective properties and performance. </span></p>

Innovative Applications of Cerium Oxide-Based Materials in Civil Engineering, Automation, and Energy Sectors

“…In this context, Arunnellaiappan et al [162] propose the formation of combined AAO/CeCC layers by applying PEO, combined with simultaneous electrophoresis of CeO 2 nanoparticles. Furthermore, the synergism between the CeCC layer and AAO sublayer, obtained under conventional conditions, was established by Andreeva et al [163], Kozhukharov et al [164], and confirmed by L. Selegård et al [165] and Ramirez et al [166].…”

Influence of the final thermal sealing on the properties of combined anodic alumina/cerium conversion coatings on AA2024-T3 aircraft alloy

“…Twelve samples cut from the AA2024-T3 aircraft alloy were subjected to three subsequent coating procedures in order to acquire identical Al 2 O 3 /CeCC double-layer coatings with similar features to those described in an earlier work [41]. The coating procedures and the respective conditions are shown in Table 1.…”

“…The acquired data underwent statistical treatment in order to obtain the respective confidential ranges of the measured values. The statistical data treatment approach is well-described and illustrated in previous works [41,44,45]. In order to collect sufficient data, each measurement was performed twice, so that eight results were acquired for each set of samples.…”

“…On the other hand, anodization is an established and efficient method used for the electrochemical formation of oxide layers on aluminum [31 -33], copper [34], zinc [35,36], titanium, [37,38] and other valve metals [39,40]. Indeed, it was recently shown that the combination of formation of cerium conversion coatings with anodization enables the successful formation of combined Al 2 O 3 /CeCC coating primers [41]. The final sealing of the already formed anodized films, also contributes to the extension of the durability of the coating primer [42,43].…”