Authors: S.U. Khudoyberdizoda, I.N. Ganiev, S.S. Savdulloeva, J.H. Dzayloev, M.M. Saidzoda, S.Yu. Kireev, M.T. Norova

Title of the article: Anodic behavior of aluminum alloy AlMg5.5Li2.1Zr0.15 of the duralumin type, doped with cerium in the NaCl electrolyte environment

Year: 2026, Issue: 2, Pages: 67-76

Branch of knowledge: 2.6.1 Metal science and heat treatment of metals and alloys

Index UDK: 669.017:620.197

DOI: 10.26730/1999-4125-2026-2-67-76

Abstract: The widespread use of duralumin in aviation, transportation and other industries is due to its high strength characteristics, low density and good manufacturability during casting and pressure treatment. This alloy belongs to the class of structural materials based on aluminum, reinforced with additives of copper, manganese, magnesium and lithium. Its operational properties are largely determined by the modes of heat treatment and the composition of alloying elements. One of the key factors limiting the durability of duralumin in aggressive environments is the tendency to local corrosion, in particular to pitting, which in freshwater is assessed primarily by the depth of the lesion. Duralumin alloy is widely used in the aircraft industry, in the manufacture of high-speed trains (for example, Shinkansen trains) and in many other branches of engineering, as it is significantly more durable than pure aluminum. Along with its high performance properties, the diverse use of duralumin is due to its high technological efficiency, which creates the prerequisites for obtaining products using all known methods of casting and plastic processing. Duralumin belongs to the category of structural alloys, which are characterized by increased strength. They are based on aluminum. Copper, manganese, and magnesium are used as additives in different percentages. The properties of duralumin depend on the heat treatment and the amount of alloying elements added. The paper presents the results of a study of the effect of cerium on the anodic behavior of aluminum alloy AlMg5.5Li2.1Zr0.15 type duralumin in the medium of electrolyte NaCl. The study of the corrosion-electrochemical behavior of alloys was carried out by the potentiostatic method in a potentiodynamic mode with a potential sweep rate of 2 mV⋅s- 1. It was shown that cerium additives reduce the rate of anodic corrosion of the initial alloy AlMg5.5Li2.1Zr0.15 by 20-30%. It was found that an increase in the concentration of chloride ion contributes to an increase in the rate of anodic corrosion, regardless of the cerium content in the alloy AlMg5.5Li2.1Zr0.15 of the duralumin type.

Key words: aluminum alloy AlMg55Li21Zr015 of the duralumin type potentiostatic method cerium NaCl electrolyte corrosion rate free corrosion potential pitting potential

Receiving date: 05.11.2025

Approval date: 15.05.2026

Publication date: 29.06.2026

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