A review of the electrochemical and galvanic corrosion behavior of important intermetallic compounds in the context of aluminum alloys

Ikeuba, Alexander I.; Njoku, Chigoziri N.; Ekerenam, Okpo O.; Njoku, Demian I.; Udoh, Inime I.; Daniel, Enobong F.; Uzoma, Paul C.; Etim, Ini-Ibehe N.; Okonkwo, Bright O.

doi:10.1039/d4ra06070a

RSC Adv.

2024

DOI: 10.1039/d4ra06070a

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A review of the electrochemical and galvanic corrosion behavior of important intermetallic compounds in the context of aluminum alloys

Alexander I. Ikeuba,

Chigoziri N. Njoku,

Okpo O. Ekerenam

et al.

Abstract: Schematic of the galvanic corrosion evolution on η-phase (MgZn2), β-phase (Al3Mg2), Q-phase (Al4Cu2Mg8Si7), and π-phase (Al8Mg3FeSi6) coupled to aluminum at different pH values using the SVET current density map.

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Comparative Analysis of the Corrosion and Mechanical Behavior of an Al-SiC Composite and AA 2024 Alloy Fabricated by Powder Metallurgy for Aeronautical Applications

Aperador,

Orozco-Hernández

2024

Metals

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This study presents a comparative analysis of the corrosion and mechanical properties of an Al-SiC composite and an AA 2024 aluminum alloy, focusing on their suitability for aeronautical applications. The Al-SiC composite was fabricated using advanced powder metallurgy techniques, incorporating a 20% volume of silicon carbide (SiC) particles, averaging 1.6 µm in size, to enhance its structural and electrochemical performance. Electrochemical evaluations in an aerated 3.5% NaCl solution revealed a significant improvement in the corrosion resistance of the Al-SiC composite. This enhancement is attributed to the cathodic nature of the SiC particles, which promote the formation of a protective aluminum oxide layer, reducing pitting corrosion and preserving the material’s structural integrity. In terms of the mechanical properties, the Al-SiC composite demonstrated a higher yield strength and ultimate tensile strength compared to the AA 2024 alloy. While it exhibited a slightly lower elongation at failure, the composite maintained a favorable balance between strength and ductility. Additionally, the composite showed a higher Young’s modulus indicating improved resistance to deformation under load. These findings underscore the potential of the Al-SiC composite for demanding aerospace applications, offering valuable insights into the development of materials capable of withstanding extreme operational environments.

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Comparative Analysis of the Corrosion and Mechanical Behavior of an Al-SiC Composite and AA 2024 Alloy Fabricated by Powder Metallurgy for Aeronautical Applications

Aperador,

Orozco-Hernández

2024

Metals

View full text Add to dashboard Cite

show abstract

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A review of the electrochemical and galvanic corrosion behavior of important intermetallic compounds in the context of aluminum alloys

Abstract: Schematic of the galvanic corrosion evolution on η-phase (MgZn2), β-phase (Al3Mg2), Q-phase (Al4Cu2Mg8Si7), and π-phase (Al8Mg3FeSi6) coupled to aluminum at different pH values using the SVET current density map.

Cited by 1 publication

References 125 publications

Comparative Analysis of the Corrosion and Mechanical Behavior of an Al-SiC Composite and AA 2024 Alloy Fabricated by Powder Metallurgy for Aeronautical Applications

Comparative Analysis of the Corrosion and Mechanical Behavior of an Al-SiC Composite and AA 2024 Alloy Fabricated by Powder Metallurgy for Aeronautical Applications

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