Navruzov Kh.P., Ganiev I.N., Amonullo Kh., Eshov B.B., Mulloeva N.M. INFLUENCE OF CADMIUM ADDITIVES ON THERMAL PROPERTIES AND THERMODYNAMIC FUNCTIONS OF LEAD

DOI: 10.18503/1995-2732-2020-18-3-42-49

Abstract

Problem Statement (Relevance): Lead and its alloys are commonly used in hydrometallurgy, battery production, electroplating and a number of other areas. The lead anode, both alloyed and unalloyed one, is a heterogeneous system; in spatially delimited areas two main processes take place, namely oxygen evolution and lead oxidation. To increase the resistance of the lead anode, it is necessary to facilitate the first process to the maximum and slow down the second one. One of the methods aimed at increasing resistance of a lead anode is its alloying with other metals. In this research up to 0.5 wt% of cadmium was used as an alloying addition to lead. Electrochemical studies indicate a positive effect of cadmium additives on the corrosion resistance of lead. There is no information in the literature on the effect of cadmium additives on the thermal properties of lead. Objective: To study the effect of lead alloying with cadmium additives and its effect on the thermal properties of lead. Methods Applied: In the research the heat capacity of leadcadmium alloys was studied in a "cooling" mode by comparing the cooling curves of the reference standard (Pb grade C00) and the samples under study. The calculations were carried out using computer technology and the Sigma Plot software. Novelty: For the first time, the effect of alloying of lead with cadmium on the thermal and thermodynamic properties of alloys. Practical Relevance: An increase in the heat capacity and heat transfer coefficient of lead, when alloyed with cadmium, helps to improve the performance quality of the electrodes of electrolysis baths and, consequently, the finished products.

Keywords

Lead, cadmium, Pb-Cd system, heat capacity, heat transfer coefficient, "cooling" mode, thermodynamic functions.

For citation

Navruzov Kh.P., Ganiev I.N., Amonullo Kh., Eshov B.B., Mulloeva N.M. Influence of Cadmium Additives on Thermal Properties and Thermodynamic Functions of Lead. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2020, vol. 18, no. 3, pp. 42–49. https://doi.org/10.18503/1995-2732-2020-18-3-42-49

Khurshed P. Navruzov – Master's student, Nikitin Institute of Chemistry, the National Academy of Sciences of Tajikistan, Dushanbe, the Republic of Tajikistan.

Izatullo N. Ganiev – DrSc (Chem.), Professor, Academician of the National Academy of Sciences of Tajikistan, Head of the Laboratory, Nikitin Institute of Chemistry, the National Academy of Sciences of Tajikistan, Dushanbe, the Republic of Tajikistan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Amonullo Khayrullo – PhD (Eng.), Senior Lecturer, the Department of Materials Science, Metallurgical Machines and Equipment, Osimi Tajik Technical University, Dushanbe, Tajikistan.

Bakhtier B. Eshov – DrSc (Eng.), Associate Professor, Director of the State Scientific Institution Center for Research of Innovative Technologies at the National Academy of Sciences of Tajikistan, Dushanbe, Tajikistan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Nukra M. Mulloeva – Head of the Laboratory, State Scientific Institution Center for Research of Innovative Technologies at the National Academy of Sciences of Tajikistan, Dushanbe, Tajikistan.

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