Correlation between microstructural evolution and corrosion resistance of hypoeutectic Al–Si–Mg alloy: Influence of corrosion product layer

Kim, Junho; Shin, Suhee; Lee, Seunghyo

doi:10.1016/j.matchar.2022.112276

Cited by 24 publications

(5 citation statements)

References 49 publications

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“…This confirms that the addition of Mg (≤15 wt.%) into AlSi improved its corrosion resistance. The higher corrosion resistance of AlSiMg5, AlSiMg10, and AlSiMg15 than that of AlSi can be attributed to the presence of a fine, uniformly distributed Al/Mg 2 Si eutectic mixture in the coatings, which facilitates the formation of stable corrosion products on the coating-layer surface [44]. In contrast to the other Mg-added samples, AlSiMg20 exhibited a significantly lower corrosion resistance than AlSi.…”

Section: Corrosion Performance 361 Potentiodynamic Polarizationmentioning

confidence: 93%

“…Al/Mg2Si eutectic mixture in the coatings, which facilitates the formation of stable corrosion products on the coating-layer surface [44]. In contrast to the other Mg-added samples, AlSiMg20 exhibited a significantly lower corrosion resistance than AlSi.…”

Section: Corrosion Performance 361 Potentiodynamic Polarizationmentioning

confidence: 97%

“…Interestingly, an additional Al 3 Mg 2 alloy phase was observed only in the AlSiMg20 sample (comprising ~33.72% of the sample). As shown in Figure 7f, the AlSiMg5 sample contained the highest volume fraction of the Mg 2 Si-containing phase (from both the primary Mg 2 Si phase and Al/Mg 2 Si eutectic mixture) among the analyzed samples; therefore, it was expected to provide the most sacrificial active sites, significantly delaying the dissolution of Al [44]. To analyze the different phases in the coatings, the phases were quantified by estimating their volume fractions using SEM images and image analysis software, as shown…”

Section: Study Of Surface Microstructures and Compositionmentioning

confidence: 99%

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Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

Jin,

2023

Materials

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Hot-dip Al–Si alloy coatings with excellent resistance to corrosion and high-temperature oxidation have emerged as promising lightweight substitutes for conventional corrosion-resistant coatings. The introduction of Mg can be an effective strategy for enhancing the sacrificial protection capability of Al–Si coatings. In this study, the effects of Mg addition on the morphology, electrochemical behavior, and mechanical properties of Al–Si coatings were investigated, along with the Mg-content optimization of the coating layer. Adding Mg promoted the formation of finely distributed eutectic intermetallic phases, such as Al/Mg2Si and the primary Mg2Si phase. Notably, the Mg2Si phase coarsened significantly when ≥15 wt.% of Mg was added. In addition, an Al3Mg2 intermetallic compound was observed in coating layers containing >20 wt.% of Mg, reducing the adhesion of the coating layers. Samples containing 5–10 wt.% of Mg exhibited excellent corrosion resistance (owing to a uniform distribution of the fine eutectic Al/Mg2Si phase and the formation of stable corrosion products), whereas those containing 20 wt.% of Mg exhibited unremarkable corrosion resistance (owing to the formation of an Al3Mg2 phase that is susceptible to intergranular corrosion).

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Section: Corrosion Performance 361 Potentiodynamic Polarizationmentioning

confidence: 93%

Section: Corrosion Performance 361 Potentiodynamic Polarizationmentioning

confidence: 97%

Section: Study Of Surface Microstructures and Compositionmentioning

confidence: 99%

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Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

Jin,

2023

Materials

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“…This led to the breakdown of the passive film and the development of crevice corrosion, as shown in Figure 11a. However, Cr23C6 precipitation in SS cladding of the SSCP after Q-T treatment became active sites for Cl − attacking [36]. Corrosion was initiated at the crevice mouth of the SS gaps and thus extended to the inside of the cladding, i.e., the propagation stage.…”

Section: Corrosion Morphology Of Stainless Steel Claddingmentioning

confidence: 99%

“…As a result, the thicker compact center region was prolonged, and corrosive pits grew from the crevice mouth to crevice center. It is worth noting that the temperature during Q-T treatment provided a driving force for carbon atoms diffusion from the CS to However, Cr 23 C 6 precipitation in SS cladding of the SSCP after Q-T treatment became active sites for Cl − attacking [36]. Corrosion was initiated at the crevice mouth of the SS gaps and thus extended to the inside of the cladding, i.e., the propagation stage.…”

Section: Corrosion Morphology Of Stainless Steel Claddingmentioning

confidence: 99%

Effect of Heat Treatment on Crevice Corrosion Behavior of 304 Stainless Steel Clad Plate in Seawater Environment

Hang,

Zhao,

Zhou

et al. 2023

Materials

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With the application of stainless steel clad plate (SSCP)-enlarging in the marine engineering field, awareness of the consequences of heat treatment on ameliorating microstructure and mechanical properties in stainless steel (SS)/carbon steel (CS) joints is being raised. However, carbide diffusion from a CS substrate to SS cladding may damage the corrosion resistance during inappropriate heating. In this paper, the corrosion behavior of a hot rolling-produced stainless steel clad plate (SSCP) after quenching and tempering (Q-T) treatment, especially crevice corrosion, was studied by electrochemical and morphological methods, such as cyclic potentiodynamic polarization (CPP), confocal laser scanning microscope (CLSM) and scanning electron microscopy (SEM). Q-T treatment led to more significance in carbon atoms diffusion and carbide precipitation, which made the passive film of the SS cladding surface on the SSCP unstable. Subsequently, a device for measuring the crevice corrosion performance of SS cladding was designed; the Q-T-treated cladding showed lower re-passivation potential (−585 mV) during CPP when compared to as-rolled (−522 mV), with the maximum corrosion depth ranging from 70.1 μm to 150.2 μm. In addition, the processing of crevice corrosion on SS cladding could be divided into three parts, including the initiation, propagation and development stages, which were driven by the interactions between corrosive media and carbides. The generation and growth mechanism of corrosive pits in crevices were revealed.

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Effect of Process Parameters on the Mechanical Properties and Microstructure of Large-Sized Aluminum Alloy Parts with Complex Shape Formed by Squeeze Casting

Chen,

Tong,

Jiang

et al. 2023

J. of Materi Eng and Perform

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Correlation between microstructural evolution and corrosion resistance of hypoeutectic Al–Si–Mg alloy: Influence of corrosion product layer

Cited by 24 publications

References 49 publications

Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

Effect of Heat Treatment on Crevice Corrosion Behavior of 304 Stainless Steel Clad Plate in Seawater Environment

Effect of Process Parameters on the Mechanical Properties and Microstructure of Large-Sized Aluminum Alloy Parts with Complex Shape Formed by Squeeze Casting

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