journal article·2025-10-01Open access

Influence of lanthanum addition on the corrosion behavior of magnesium alloy

R. Venkatesh, S. Manivannan, P. Dinesh, R. Soundararajan, Debabrata Barik, Seepana Praveenkumar, Prabhu Paramasivam, Ankush Mehta

AIP Advances· Volume 15· Issue 10

Abstract

Magnesium alloy has lower density than aluminum and exhibits excellent performance in aerospace and automotive weight management applications. The main objective of this study is to synthesize and enhance the behavior of magnesium alloy (Mg–9Li–3Al–xLa) by the addition of 0, 0.5, 1, 1.5, and 2 wt. % of lanthanum (La) via a stir-casting process under an inert atmosphere. The influence of processing on the surface morphology and corrosion behavior of Mg alloys with different La contents was studied. Scanning electron microscopy analysis revealed that the magnesium alloy featuring La is found in fine grain boundaries and that La interfaces with the magnesium alloy to form intermetallic structures such as Al4La and Al11La3, which leads to increased heterogeneous nucleation, resulting in grain refinement of the magnesium microstructure. The investigational results of potentiodynamic polarization, recorded by the reduced corrosion current density, exhibit superior resistance to corrosion. The magnesium alloy LA93-1 wt. % La exhibited optimum corrosion resistance with an Ecorr of −1530 mV, and an Icorr of 0.20 mA/cm2 was observed.
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Research context

OpenAlex topics: Magnesium Alloys: Properties and Applications · Corrosion Behavior and Inhibition · Aluminum Alloys Composites Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, SIMATS 1 , Chennai 602105, Tamil Nadu,

Department of Metallurgical Engineering, National Institute of Technology 2 , Tiruchirappalli, Tamil Nadu,

Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology 3 , Coimbatore, Tamil Nadu,

Department of Mechanical Engineering, Karpagam Academy of Higher Education 4 , Coimbatore 641021,

Centre for Energy and Environment, Karpagam Academy of Higher Education 5 , Coimbatore 641021,

Department of Nuclear and Renewable Energy, Ural Federal University 6 , Ekaterinburg,

Centre for Research Impact and Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University 7 , Rajpura 140401, Punjab,

Department of Mechanical Engineering, Mattu University 8 , Mettu 318,

Marwadi University Research Centre, Department of Mechanical Engineering, Faculty of Engineering and Technology, Marwadi University 9 , Rajkot 360003, Gujarat,

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