Permanganate loaded Ca-Al-LDH coating for active corrosion protection of 2024-T3 alloy

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Olmo Martínez, Rubén del and Mohedano Sánchez, Marta and Matykina, Endzhe and Arrabal Durán, Raúl (2022) Permanganate loaded Ca-Al-LDH coating for active corrosion protection of 2024-T3 alloy. Corrosion Science, 198 . p. 110144. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2022.110144




Abstract

Ca-Al-Layered Double Hydroxide (Ca-Al-LDH) coating was explored on 2024-T3 aluminium alloy by in situ growth methodology following a 1 h treatment at atmospheric pressure. Mn-based species were successfully incorporated into the Ca-Al-LDH structure by a low-temperature post-treatment (Ca-Al-LDH-Mn). Both LDH coatings disclosed a flaky-like morphology and low thickness (~0.6 µm). Ca-Al-LDH-Mn coating showed optimal paint adhesion and the highest long-term corrosion resistance in 3.5 wt% NaCl solution. Evaluation of scribed LDH specimens by SEM/EDS techniques up to 7 days of immersion in 3.5 wt% NaCl solution revealed that the presence of Mn species in the Ca-Al-LDH-Mn provided active corrosion protection.


Item Type:Article
Uncontrolled Keywords:2024-T3; Aluminium; Layered double hydroxides; LDH; Corrosion inhibitors; Active corrosion protection
Subjects:Sciences > Chemistry > Materials
ID Code:70909
Deposited On:04 Mar 2022 10:59
Last Modified:04 Mar 2022 11:59

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