Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy

In this work, the effects of the tropical marine atmospheric environment on the corrosion behaviour of the 7B04-T74 aluminium alloy were systematically investigated by using accelerated testing, together with corrosion kinetic analysis, microstructure observation, product composition analysis, and p...

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Main Authors: Ning Li, Weifang Zhang, Xiaojun Yan, Meng Zhang, Lu Han, Yikun Cai
Format: Article
Language:English
Published: MDPI AG 2023-05-01
Series:Metals
Subjects:
Online Access:https://www.mdpi.com/2075-4701/13/5/995
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author Ning Li
Weifang Zhang
Xiaojun Yan
Meng Zhang
Lu Han
Yikun Cai
author_facet Ning Li
Weifang Zhang
Xiaojun Yan
Meng Zhang
Lu Han
Yikun Cai
author_sort Ning Li
collection DOAJ
description In this work, the effects of the tropical marine atmospheric environment on the corrosion behaviour of the 7B04-T74 aluminium alloy were systematically investigated by using accelerated testing, together with corrosion kinetic analysis, microstructure observation, product composition analysis, and potentiodynamic polarization curve tests. The weight loss method was used for the corrosion kinetics analysis. The surface morphology and corrosion products transformation law were investigated by OM, SEM, EDS, and XPS. The electrochemical characteristics were studied using potentiodynamic polarization curves. The research indicated that the 7B04-T74 aluminium alloy has eminent corrosion resistance in the tropical marine atmospheric environment. Localized pitting corrosion occurred rapidly in the tropical marine atmosphere. In the later stage of corrosion, the corrosion of aluminium alloy did not become serious. Specifically, no obvious intergranular corrosion was found, which is related to the thermal treatment method. Corrosion products included Al(OH)<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>, and AlCl<sub>3</sub>, of which Al(OH)<sub>3</sub> is the most notable.
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spelling doaj.art-8b9d2051d6db42998645e8edc5901cb82023-11-18T02:28:46ZengMDPI AGMetals2075-47012023-05-0113599510.3390/met13050995Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium AlloyNing Li0Weifang Zhang1Xiaojun Yan2Meng Zhang3Lu Han4Yikun Cai5School of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaSchool of Reliability and Systems Engineering, Beihang University, Beijing 100191, ChinaSchool of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaSpace Environment and Reliability Division, Beijing Institute of Spacecraft System Engineering, Beijing 100094, ChinaSchool of Reliability and Systems Engineering, Beihang University, Beijing 100191, ChinaSchool of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, ChinaIn this work, the effects of the tropical marine atmospheric environment on the corrosion behaviour of the 7B04-T74 aluminium alloy were systematically investigated by using accelerated testing, together with corrosion kinetic analysis, microstructure observation, product composition analysis, and potentiodynamic polarization curve tests. The weight loss method was used for the corrosion kinetics analysis. The surface morphology and corrosion products transformation law were investigated by OM, SEM, EDS, and XPS. The electrochemical characteristics were studied using potentiodynamic polarization curves. The research indicated that the 7B04-T74 aluminium alloy has eminent corrosion resistance in the tropical marine atmospheric environment. Localized pitting corrosion occurred rapidly in the tropical marine atmosphere. In the later stage of corrosion, the corrosion of aluminium alloy did not become serious. Specifically, no obvious intergranular corrosion was found, which is related to the thermal treatment method. Corrosion products included Al(OH)<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>, and AlCl<sub>3</sub>, of which Al(OH)<sub>3</sub> is the most notable.https://www.mdpi.com/2075-4701/13/5/995aluminium alloytropical marine atmospherecorrosion behavior
spellingShingle Ning Li
Weifang Zhang
Xiaojun Yan
Meng Zhang
Lu Han
Yikun Cai
Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
Metals
aluminium alloy
tropical marine atmosphere
corrosion behavior
title Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
title_full Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
title_fullStr Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
title_full_unstemmed Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
title_short Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
title_sort effect of tropical marine atmospheric environment on corrosion behaviour of the 7b04 t74 aluminium alloy
topic aluminium alloy
tropical marine atmosphere
corrosion behavior
url https://www.mdpi.com/2075-4701/13/5/995
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