INFLUENCE ADDITION OF CALCIUM ON CORROSION-ELECTROCHEMICAL BEHAVIOR OF ALLOY AF5S10 IN AQUEOUS SOLUTIONS NaCl

Aliev²,

Odinazoda³

et al. 2021

MoEM

The effect of impurities on the electrical conductivity of aluminum has been studied in detail. The electrical conductivity of aluminum is 65.45% of that of copper. The tensile strength of aluminum wire is 150–170 MPa which, at equal conductivity, is about 65% of the strength of copper wire. This strength of aluminum wire is sufficient for bearing the wire’s own weight but may be too low in case of snow, ice or wind overloads. One way to improve the strength of aluminum wire is to use aluminum alloys having higher strength combined with sufficiently high electrical conductivity, e.g. the E-AlMgSi alloy (Aldrey). The key strengthening agent of the E-AlMgSi alloy (Aldrey) is the Mg2Si phase which imparts high mechanical strength to aluminum. In this work we present experimental data on the kinetics of high-temperature oxidation and electrochemical corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey). Thermal gravimetric study has shown that indium doping and high temperature exposure increase the oxidation rate of E-AlMgSi alloy (Aldrey), with the apparent alloy oxidation activation energy decreasing from 120.5 to 91.8 kJ/mole. Alloy oxidation rate data determined using a potentiostatic technique in NaCl electrolyte media have shown that the corrosion resistance of the indium doped alloy is 20–30% superior to that of the initial alloy. With an increase in NaCl electrolyte concentration the electrochemical potentials of the alloys decrease whereas the corrosion rate increases regardless of alloy composition.

“…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].…”

Section: Methodsmentioning

confidence: 99%

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

Aliev²,

Odinazoda³

et al. 2021

MoEM

“…The method of measuring alloy polarization curves is described in detail earlier [6][7][8][9][10][11][12][13][14][15]. The results of electrochemical corrosion study for tin containing E-AlMgSi (Aldrey) aluminum alloy are summarized in the Table 1 and illustrated in Figs 2-5.…”

Section: Methodsmentioning

confidence: 99%

Corrosion and electrohemical behavior of aluminum conductor E-AlMgSi (Aldrey) alloy with tin in a medium electrolite NaCl

Abulakov²,

Jayloev³

et al. 2019

MoEM

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 has remained virtually 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. Conducting aluminum alloys type of the E-AlMgSi (Aldrey) are representatives of this group of alloys and belong to heat-strengthened alloys. They are distinct by high strength and good ductility. These alloys, with appropriate heat treatment, acquire high electrical conductivity. The producing made from it are used almost exclusively for overhead power lines. The paper presents the results of a study of the anodic behavior of aluminum E-AlMgSi (Aldrey) alloy with tin in a medium electrolyte of 0.03; 0.3 and 3.0% NaCl. Corrosion-electrochemical studies of the alloys were carried out by the potentiostatic method in potentiostat PI-50-1.1 at a potential sweep speed of 2 mV/s. It is shown that alloying E-AlMgSi (Aldrey) alloy with tin increases its corrosion resistance by 20%. The main electrochemical potentials of the E-AlMgSi (Aldrey) alloy, when doped with tin, shift to a positive range of values, and from the concentration of sodium chloride in the negative direction of the ordinate.

“…где k = 0,335 г/(А · ч) для алюминия. Подробно методика снятия поляризационных кривых сплавов представлена в работах [6][7][8][9][10][11][12][13][14][15]. Результаты коррозионно−электрохимических исследований сплава E−AlMgSi (алдрей) с оловом в среде электролита NaCl приведены в таблице и на рис.…”

Section: образцы и методы исследованияunclassified

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

Izv. vysš. učebn. zaved., Mater. èlektron. teh.

Abulakov²,

Jayloev

et al. 2019

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.