Anode behavior of E-AlMgSi (“Aldrey”) conductive aluminium alloy with cadmium in NaCl solution

When creating new materials designed to work in particularly harsh conditions, the task arises of imparting corrosion resistance to them, the practical solution of which is associated with the level of knowledge in the field of protecting metals from corrosion. When using conductive aluminum alloys to make thin wire, such as winding wire, etc. certain difficulties may arise due to their insufficient strength and a small number of kinks before failure. In recent years, aluminum alloys developed that, even in a soft state, have strength characteristics that allow them to be used as a conductor material. One of the conductive aluminum alloys is E-AlMgSi («Aldrey»), which belongs to heat-strengthened alloys. It has high strength and good ductility. This alloy with appropriate heat treatment acquires a high electrical conductivity. Wires made from it used almost exclusively for overhead power lines.

The paper presents the results of a study of the anodic behavior of the aluminum conductor alloy E-AlMgSi with cadmium, in an electrolyte medium of 0,03; 0,3 and 3,0% NaCl. The corrosion-electrochemical study of the alloys was carried out by the potentiostatic method on a PI-50-1.1 potentiostat at a potential sweep rate of 2 mV/s. It has been shown that alloying the E-AlMgSi aluminum alloy with cadmium increases its corrosion resistance by 20%. The potentials of corrosion, pitting formation and repassivation of alloys when alloyed with cadmium shifted to the positive range of values, and from the concentration of sodium chloride in the negative direction of the y-axis.

1. Usov, V. V., Zaimovsky, A. S. (1957). Conductor, rheostatic and contact materials. Materials and alloys in electrical engineering Volume II. Moscow: Gosenergoizdata.

2. Reitbarg, L. H. (1979). Aluminum alloys: properties, processing, application. Ed. 13th, revised and additional. Moscow: Metallurgy.

3. Altman, M. B. and others. (1984). Industrial aluminum alloys. Moscow: Metallurgy.

4. Umarova, T. M., Ganiev I. N. (2017). Corrosion of double aluminum alloys in neutral environments. Dushanbe: Donish.

5. Bokiev, L. A., Ganiev I. N., Khakimov A. Kh., & Azimov Kh. Kh. (2019). The influence of magnesium on the anodic behavior of the aluminum alloy AZh5K10 in a NaCl electrolyte environment. Bulletin of the Siberian State Industrial University, 4(30), 45-50.

6. Ganiev, I. N., Abdulakov, A. P., Dzhayloev, J. H., Yakubov, U. Sh., Safarov, A. M., & Abulkhaev, V. D. (2020). The influence of bismuth additives on the thermophysical and thermodynamic properties of the aluminum conductor alloy E-AlMgSi (“Aldrey”). News of higher educational institutions. Electronic Engineering Materials, 23(1), 86-93.

7. Odinaev, F. R., Ganiev, I. N., Safarov, A. G., & Yakubov, U. Sh. (2017). Stationary potentials and anodic behavior of the AZh 4.5 alloy doped with bismuth. News of the St. Petersburg State Technological Institute (Technical University), (38), 8-12.

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