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CSME 2024/05
Volume 45 No.2
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195-200
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Investigation of Corrosion Properties of LA-91 Alloy Coated with MAO Method
Suleyman Sukuroglu a, Yasar Totik b, Ebru Emine Sukuroglu c and Selcuk Avci b
aDepartment of Occupational Health and Safety, Gumushane University, Gumushane 29100, Türkiye
bDepartment of Mechanichal Engineering, Ataturk University, Erzurum 25240, Türkiye
cDepartment of Mechanichal Engineering, Gumushane University, Gumushane 29100, Türkiye
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Abstract:
LA91 magnesium alloy is a super lightweight magnesium-lithium alloy proposed for next generation materials. In addition to the advantages of these alloys such as low density, high strength-to-weight ratio, specific stiffness and brittleness, these alloys also have disadvantages such as low corrosion resistance and the oxide-carbonate film formed on the surfaces of the alloys cannot provide sufficient corrosion protection even in non- corrosive environments. In this study, micro arc oxidation, one of the coating methods, was applied to LA91 alloy. The surface morphologies of the coatings were characterized and it was aimed to increase the corrosion resistance of LA91 alloy. For this purpose, potentiodynamic polarization tests were carried out in 3.5% NaCl solution at room temperature to draw attention to the protection of the coating. As a result of the tests, it was determined that the oxide coatings raised on the surface increased the corrosion resistance of LA91 materials.
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Keywords: Corrosion properties, LA91 magnesium alloy, Micro-arc oxidation method, Surface coating.
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*Corresponding author; e-mail:
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©
2024
CSME , ISSN 0257-9731
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