Analysis of localized corrosion mechanism of 2024 aluminum alloy at a simulated marine splash zone

Mao, Yingchang; Zhu, Yu; Deng, Cheng-Man; Sun, Shengkai; Xia, Da-Hai

doi:10.1016/j.engfailanal.2022.106759

Cited by 23 publications

(12 citation statements)

References 19 publications

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“…The service environment of Al alloy marine equipment such as large ships, amphibious aircraft and vehicles not only involves seawater and marine atmosphere, but also involves the interface area of seawater/marine atmosphere, namely, the interface area of seawater/atmosphere (Mao et al, 2022). The seawater/ atmosphere interface is mainly divided into three environmental conditions: waterline zone, tidal range zone and splash zone.…”

Section: Introductionmentioning

confidence: 99%

“…It is a very important structural material for amphibious aircraft and vehicles, carrier-borne aircraft, cross-sea bridge and other high-tech marine engineering equipment and structures. Al alloys of 2×××× series, 5×××× series and 6×××× series with good corrosion resistance are often used for seaplane and ship (Mao et al , 2023; Zhu et al , 2022). Offshore Al alloy equipment has been subjected to seawater and salt spray erosion for a long time, as well as the impact of sea wind and sea waves.…”

Section: Introductionmentioning

confidence: 99%

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Pitting corrosion of 2A12 aluminum alloy long-scale specimen in simulated seawater splash zone, dynamic waterline zone and full immersion zone

Zhu

Li³

et al. 2023

ACMM

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Purpose The aim of this paper is to construct a device that simulated the seawater splash zone, dynamic waterline zone (splash zone) and full immersion zone. Localized corrosion of 2A12 aluminum alloy long-scale specimen was studied. Design/methodology/approach Corrosion morphologies before and after the corrosion product removal were used to identify corrosion intensity at full seawater immersion zone, dynamic waterline zone (splash zone) and atmospheric zone. The average depth and diameter of corrosion pits in the three zones were evaluated by three-dimensional optical microscopy. The impact of wetting time of the atmospheric zone on the localized corrosion was investigated. Findings Corrosion pits were observed on the surface on day 4 for the wetted atmospheric zone (Case 1), and on the surface on day 8 for the alternant wet/dry atmospheric zone (Case 2). The corrosion product layer on the surface for Case 1 was partially broken down while the layer on the surface for Case 2 was intact. Average pitting depth and pitting diameters for Case 1 were more serious than that for Case 2. Originality/value The above findings revealed that the humidity of the atmospheric zone had great impact on the localized corrosion of aluminum alloy at the seawater splash zone.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pitting corrosion of 2A12 aluminum alloy long-scale specimen in simulated seawater splash zone, dynamic waterline zone and full immersion zone

Zhu

Li³

et al. 2023

ACMM

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“…As the potential reaches a very positive value, the current did not increase which is due to concentration polarization. There is no Tafel region in all the three polarization curves, indicating that the Al surface did not follow uniform active dissolution (Mao et al , 2022).…”

Section: Resultsmentioning

confidence: 99%

Corrosion behavior of a five-layer Al alloy composite plate in NaCl solution

Zhou

Wang

et al. 2023

ACMM

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Purpose This paper aims to investigate the electrochemical corrosion behavior of a five-layer Al alloy composites (4343/4047/3003/4047/4343) with a thickness of 0.2 mm in NaCl solution. Design/methodology/approach Electrochemical impedance spectroscopy, polarization curve and morphology analyses were used to study the corrosion behavior of the Al alloy composites from cross-sectional and plane directions. Findings The corrosion resistance of the surface from the plane direction was higher than that from the cross sections. Si-enrich particles were observed in the outer 4047/4343 layer, and AlFeCuMnBi phases were identified in the core 3003 layer. The galvanic coupling between the Si-enrich particle and the Al matrix accelerated the dissolution Al matrix. Originality/value This work lays the experimental foundation for corrosion mechanism of the Al alloy composite plate.

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“…Recently, some work on the corrosion behavior of aluminum alloys has been performed [ 15 , 16 , 17 , 18 , 19 , 20 ]. Zhao et al studied the atmospheric corrosion behavior and mechanism of 7A85 aluminum alloy in Qingdao industrial-marine atmosphere and concluded that pitting corrosion and IGC caused significant deterioration of the mechanical properties of 7A85 aluminum alloy [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior and Mechanical Performance of 7085 Aluminum Alloy in a Humid and Hot Marine Atmosphere

Tao¹,

Xiang²,

Zhang³

et al. 2022

Materials

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This work analyzed changes in the corrosion morphology and mechanical performance of 7085 aluminum alloy after outdoor exposures for different times in a humid and hot marine atmospheric environment. After one month of exposure, a pronounced corrosion of the alloy was observed. The corrosion product was mainly Al(OH)3, and the corrosion features were mainly pitting corrosion and intergranular corrosion (IGC). With the exposure time extended from 6 months to 12 months, the IGC depth increased from 114 μm to 190 μm. After a 1-year outdoor exposure in a humid and hot marine environment, the alloy’s ultimate strength and yield stress remained nearly unchanged, while its elongation and area reduction decreased from the original 6% and 9%, respectively, to 3% and 5%. Moreover, the reasons for IGC and its effect on the mechanical performance was analyzed.

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Analysis of localized corrosion mechanism of 2024 aluminum alloy at a simulated marine splash zone

Cited by 23 publications

References 19 publications

Pitting corrosion of 2A12 aluminum alloy long-scale specimen in simulated seawater splash zone, dynamic waterline zone and full immersion zone

Pitting corrosion of 2A12 aluminum alloy long-scale specimen in simulated seawater splash zone, dynamic waterline zone and full immersion zone

Corrosion behavior of a five-layer Al alloy composite plate in NaCl solution

Corrosion Behavior and Mechanical Performance of 7085 Aluminum Alloy in a Humid and Hot Marine Atmosphere

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