A novel approach used to study the corrosion susceptibility of metallic materials at a dynamic seawater/air interface

Xia, Da-Hai; Mao, Yingchang; Zhu, Yu; Yuan, Quan; Deng, Cheng-Man; Hu, Wenbin

doi:10.1016/j.corcom.2022.03.001

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…At present, important progress has been made in the research on the corrosion of metal materials in the water-air interface zone at home and abroad. The simulation testing devices such as tidal zone (Zhao et al, 2017), spray splash zone (Chang and Song, 2012) and dynamic seawater/air interface (Xia et al, 2023a(Xia et al, , 2023bXia et al, 2022) have been established, but the impact of wetting time of the atmospheric zone on the localized corrosion of Al alloy has not been investigated.…”

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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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%

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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“…Different authors have mentioned the difficulty of determining the corrosion process that occurs on some materials' surfaces; for that reason, it is important to apply different methods [27,46,56,[58][59][60][61][62][63][64][65]. This research showed that methods such as HHT and the Lyapunov exponent are good options to determine the type of corrosion on the material's surface.…”

Section: Discussionmentioning

confidence: 99%

Electrochemical Noise Analysis Using Experimental Chaos Theory, Power Spectral Density and Hilbert–Huang Transform in Anodized Aluminum Alloys in Tartaric–Phosphoric–Sulfuric Acid Solutions

Martínez-Ramos,

Olguin-Coca,

Lopez-Leon

et al. 2023

Metals

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Aluminum and its alloys find widespread applications across diverse industries such as the automotive, construction, and aeronautics industries. When these alloys come into contact with ambient air, an Al2O3 thin oxide layer is naturally formed, typically measuring 2 to 4 nm and exhibiting remarkable hardness and protective qualities, rendering the alloys corrosion-resistant in specific atmospheric and chemical environments. This study aimed to characterize the electrochemical behaviors of anodized AA2024 and AA7075 alloys within a complex three-component electrolyte composed of tartaric–phosphoric–sulfuric acid (TPSA) solutions. The anodized specimens were subsequently exposed to 3.5 wt.% NaCl solution at room temperature, and their electrochemical performances were meticulously evaluated using an electrochemical noise (EN) analysis in accordance with ASTM G-199, respectively. In the EN, three methods of data analysis were used: the time domain analysis (chaos analysis: application of Lyapunov exponent and dimension correlation), the frequency domain analysis (power spectral density, PSD), and the time–frequency domains analysis (Hilbert–Huang transform, HHT). Scanning electron microscopy (SEM) was used to observe the morphologies of the anodized surfaces. The results indicated that the AA2024-0, AA2024-1, and AA2024-2 alloys and the AA7075-2 and AA7075-3 samples exhibited mixed corrosion according to the Lyapunov constant, with a notable inclination towards localized corrosion when analyzed using the PSD and HHT methods. The surface was not homogenous, and the corrosion process was predominately localized in specific zones.

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“…During the whole experiment period (72 days), the sample was partially immersed in the solution and the corrosion in full immersion region was analysed; the detailed experimental procedure is shown in Ref. [17]. The solution was exposed to air, and its temperature was 21°C.…”

Section: Experimental Methodsmentioning

confidence: 99%

A high-resolution characterisation of localised corrosion of AA5083-H111 in simulated seawater by TEM

Mao

Dang

et al. 2022

Corrosion Engineering, Science and Technology

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The localised corrosion of aluminium alloy (AA) 5083-H111 in 3.5 wt-% NaCl solution was studied by combing scanning electron microscope (SEM), focused ion beam (FIB) and transmission electron microscopy (TEM) techniques. It was found that the Ti-rich intermetallic particles (IMPs) served as the cathodes and triggered the dissolution of its adjacent Al matrix; as a result, a trench was formed between the IMP and its surrounding Al matrix. Raised 'circles' were identified on the alloy surface at the periphery of the IMPs, which was considered to be the cathodic region on which corrosion products deposited. A sub-surface that consisted of fine Al grains and corroded Al-Mg phases were observed under the raised 'circle' region.

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A novel approach used to study the corrosion susceptibility of metallic materials at a dynamic seawater/air interface

Cited by 10 publications

References 13 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

Electrochemical Noise Analysis Using Experimental Chaos Theory, Power Spectral Density and Hilbert–Huang Transform in Anodized Aluminum Alloys in Tartaric–Phosphoric–Sulfuric Acid Solutions

A high-resolution characterisation of localised corrosion of AA5083-H111 in simulated seawater by TEM

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