Authors: I.N. Ganiev, M.M. Saidov, U.N. Faizulloev, S.U. Khudoiberdizoda

Title of the article: Potentiostatic study of aluminum alloy AM4.5Mg1 type duralumine with lanthanum in an aqueous solution of NaCl

Year: 2024, Issue: 1, Pages: 23-33

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

Index UDK: 669.017:620.197

DOI: 10.26730/1999-4125-2024-1-23-33

Abstract: Duralumin alloy is widely used in aircraft manufacturing, in the production of high-speed trains (for example, Shinkansen trains) and in many other branches of mechanical 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 manufacturability, which creates the prerequisites for producing 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 added alloying elements. The article presents the results of a potentiostatic study of aluminum alloy AM4.5Mg1 type duralumin with lanthanum in an aqueous solution of NaCl with a concentration of 0.03%; 0.3% and 3.0% wt. %, at a potential sweep rate of 2 mV/s. The addition of lanthanum to the aluminum alloy AM4.5Mg1 of the duralumin type was 0.05-1.0 wt. %. It has been shown that doping the specified alloy with lanthanum reduces its corrosion rate by 13-18%, which is accompanied by a shift to the region of positive values of electrochemical potentials. An increase in the concentration of NaCl in an aqueous solution contributes to an increase in the corrosion rate of alloys, regardless of their composition, and a shift of electrochemical potentials in the negative direction of the ordinate axis.

Key words: aluminum alloy AM45Mg1 type duralumin lanthanum potentiostatic method electrochemical potentials aqueous NaCl solution corrosion rate

Receiving date: 08.12.2023

Approval date: 15.02.2024

Publication date: 12.03.2024

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