Anodic Behavior of Aluminum Alloy AM4.5Mg1 of the Duralumin Type, Alloyed with Praseodymium, in a NaCl Solution

   The history of the use of aluminum for construction and aircraft goes back to the years before the First World War. On the eve of this war, the famous German designer Count Zeppelin developed a project for a large rigid airship. However, it turned out that it was impossible to make its frame from wood, since it turned out to be heavy and fragile. Aluminum was the best choice, but it was too soft. And then a fundamental decision was made to use duralumin, a light and durable aluminum-based alloy, invented in 1909 by the German chemist Wilm, in the designs of aeronautics. After the city of Duren, where it was possible to establish the production of the new metal, it was called duralumin or duralumin. 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 study of the effect of praseodymium on the anodic behavior of aluminum alloy AM4.5Mg1 of the duralumin type in a NaCl electrolyte environment. The study of the corrosion-electrochemical behavior of alloys was carried out by potentiodynamic mode with a potential sweep rate of 2 mV/s. It has been shown that the addition of praseodymium reduces the rate of anodic corrosion of the original alloy AM4.5Mg1 of the duralumin type by 20…30 %. It has been established that an increase in the concentration of chloride ion promotes an increase in the rate of anodic corrosion, regardless of the praseodymium content in the AM4.5Mg1.

1. Beletsky, V. M. (2005). Aluminum alloys. Composition, properties, technology, application. Handbook. V.M. Beletsky, G.A. Krivov; Under general ed. acad. I.N. Fridlyander. Kyiv: KOMINTEKH. (in Russ.)

2. Fridlyander, I. N. (2002). Modern aluminum, magnesium alloys and composite materials based on them. Metal Science and Therm. arr. Metals, (7), 24-29. (in Russ.)

3. Fridlyander, I.N., Kolobnev, N. I., & Khokhlatova, L .B. et al. (2000). Proceedings of the 7^th International Conference on Aluminum Alloys (ICAA-7), 3, 1393-1397. (in Russ.)

4. Antipov, V. V., Lavro, N. A., Sukhoivanenko, V. V., & Senatorova, O. G. (2013). Experience in using Al–Li alloy 1441 and layered materials based on it in seaplanes. Non-ferrous metals, (9), 46-50. (in Russ.)

5. Prach, E. L., Mikhalenkov, K. V.(2014). Development of a new cast alloy of the Al–Mg–Si–Mn system with the addition of Li. Foundry production, (7), 13-15. (in Russ.)

6. Shikun, X., Rongx, I. Y., Zhi, G., Xiang, X., Chagen, H., and Xiuyan, G. (2010). Effects of Rare Earth Ce on Casting Properties of Al-4.5Cu Alloy, Adv. Mater. Res., 136, 1-4.

7. Chaubey, A. K., Mohapatra, S., Jayasankar, K., Pradhan, S. K., Satpati, B., Sahay, S. S., Mishra, B. K. and Mukherjee, P. S. (2009). Effect of cerium addition on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy. Transactions of the Indian Institute of Metals, 62(6), 539-543.

8. J. Grȍbner, D. Mirkovic, and R. Schmid-Fetzer. (2004). Thermodynamic Aspects of the Constitution, Grain Refining, and Solidification Enthalpies of Al-Ce-Si Alloys, Metall. Mater. Trans. A, 35, 33-49.

9. Shemetev, G. F.(2012). Aluminum alloys: compositions, properties, application. Textbook for the course “Production of castings from non-ferrous metal alloys.” Part I (Electronic resource). St. Petersburg. (in Russ.)

10. Shevchenko, A. A. (2006). Chemical resistance of non-metallic materials and corrosion protection. Moscow: Kolos. (in Russ.)

11. Ganiev, I. N., Abulakov, A. P., Dzhayloev, J. H., Aliev, F. A., & Rashidov, A. R. (2019). Corrosion-electrochemical behavior of aluminum conductor alloy E-AlMgSi («ALDREY») with tin in a NaCl electrolyte environment. News of higher educational institutions. Electronic materials, 22(2), 128-134. (in Russ.)

12. Ganiev, I.,N., Zokirov, F. Sh., Sangov, M. M., & Berdiev, A. E. (2020). Kinetics of oxidation of aluminum alloy AK12M2 modified with barium in the solid state. News of the St. Petersburg State Technological Institute (Technical University). (55), 28-33. (in Russ.)

13. Ganiev, I. N., Abulakov, A. P., Dzhayloev, J. H., Ganieva, N. I., & Yakubov, U. Sh. (2020). The influence of lead additives on the anodic behavior of the conductive aluminum alloy E-AlMgSi (“ALDREY”) in the NaCl electrolyte. Bulletin of the St. Petersburg State University of Technology and Design. Series 1: Natural and technical sciences, (2). 109-113. (in Russ.)

14. Ganiev, I. N., Yakubov, U. Sh., Nazarova, M. T., & Kurbonova, M. Z. (2019). The influence of potassium additives on the temperature dependence of the heat capacity and changes in the thermodynamic functions of the AB1 aluminum alloy. Bulletin of the Kazan State Technical University named after. A.N. Tupolev.75(4), 16-22. (in Russ.)

15. Ganiev, I. N., Saidova, F. R., Khudoiberdizoda, S. U., Savdulloeva, S. S., Dzhayloev, J. H., & Abulkhaev, V. D. (2023). Anodic behavior of aluminum alloy AlMg5.5Li2.1Zr0.15 alloyed with calcium in NaCl electrolyte. News of the St. Petersburg State Technological Institute (Technical University), (2), 37-41. (in Russ.)