Investigation of corrosion and high-temperature oxidation behavior of stir-cast and heat-treated Mg-Gd-Y-Er alloy

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-02-23 DOI:10.1016/j.matchemphys.2025.130594

Sudharsan S , Raja Annamalai A

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Abstract

Magnesium is highly reactive, so it is essential to understand the corrosion and oxidation behavior to improve the material's lifespan in real-world conditions. This study aims to investigate the effect of heat treatment on the corrosion and elevated temperature oxidation behavior of the Mg-Gd-Y-Er alloy. An electrochemical technique, specifically Tafel and EIS, was utilized to examine the corrosion behavior of the alloy in a 0.6 M NaCl and 0.05 M H₂SO₄ solution. The oxidation behavior of the alloy was analyzed at temperatures ranging from 303 °C to 523 °C. The solution-treated sample highlights improved resistance to corrosion and oxidation under the examined conditions. The randomly dispersed precipitates in the grains accelerated the corrosion behavior of the Mg-RE alloy. The oxidation behavior of the stir-casted and heat-treated Mg-RE alloy exhibits parabolic kinetics, and magnesium oxide is formed at lower operating temperatures. In comparison, rare-earth oxides were formed at higher temperatures. The study investigated the effect of heat treatment on the corrosion and oxidation resistance of magnesium alloys, which is vital for their use in aerospace and automotive applications.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.