Corrosion-electrochemical behavior of an aluminum conductive E-AlMgSi alloy (aldrey) with tin in the environment of NaCl electrolyte

Abstract

The economic feasibility of using aluminum as a conductive material is explained by the favorable ratio of its cost to the cost of copper. In addition, one should take into account the factor that the cost of aluminum remains practically unchanged for many years. When using conductive aluminum alloys for the manufacture of thin wire, winding wire, etc. Certain difficulties may arise in connection with their insufficient strength and a small number of kinks before fracture. In recent years, aluminum alloys have been developed, which even in a soft state have strength characteristics that allow them to be used as a conductive material. One of the promising areas for the use of aluminum is the electrical industry. Conductive aluminum alloys type E-AlMgSi (aldrey) are representatives of this group of alloys and treats heat-strengthened alloys. They are distinguished by high strength and good ductility. These alloys with appropriate heat treatment acquires high electrical conductivity. The wires made from it are used almost exclusively for overhead power lines.In the work presents the results of the study of the anodic behavior of aluminum alloy E-AlMgSi (aldrey) with tin, in a medium electrolyte 0.03; 0.3 и 3.0% NaCl. A corrosion-electrochemical study of alloys was carried out using the potentiostatic method on a PI-50-1.1 potentiostat at a potential sweep rate of 2 mV/s. It is shown that alloying E-AlMgSi (aldrey) c with tin increases its corrosion resistance by 20%. The main electrochemical potentials of the alloys when doping with tin are shifted to the positive range of values, and from the concentration of sodium chloride in the negative direction of the ordinate axis.

Effect of calcium doping on the anodic behavior of E-AlMgSi (Aldrey) conducting aluminum alloy in NaCl electrolyte medium

“…The reproducibility of the data on the electrochemical potentials was ±1 ÷ ±2 mV, the current density being (0.001-0.005) • 10 -2 A/m 2 . The polarization curve recording method was described in detail earlier [5][6][7][8][9][10][11][12][13][14].…”

Corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey)

“…The potential sweep was 2 mV/s. The polarization curve recording method for the E-AlMgSi alloy (Aldrey) was described earlier [13][14][15][16][17][18][19][20][21][22].…”

“…Then slag was removed from the alloys and specimens for corrosion and electrochemical tests were cast into a graphite mold. The specimens had a cylindrical shape and were 10 mm in diameter and 140 mm in length [13].…”

Effect of calcium additives on the anodic behavior of the conductive aluminum alloy E-AlMgSi (Aldrey) in the medium of the NaCl electrolyte

“…Воспроизводимость измерения электрохимических потенциалов равнялся ±1 ÷ ±2 мВ, плотность тока коррозии составляла (0,001-0,005) • 10 -2 А/м 2 . Методика снятия поляризационных кривых сплавов подробно описан в работах [5][6][7][8][9][10][11][12][13][14].…”