Anodic behavior of In- and In- Bi-electrode in chloride and perchlorate electrolytes
The work is devoted to the study of the corrosion behavior of indium and modified bismuth-indium electrodes used in the electrochemical refining of indium. Corrosion diagrams for both electrodes in chloride and perchlorate electrolytes of different compositions have been obtained by varying the pH and temperature of the solution and the ionization rates of indium have been calculated. Rate of corrosion reaction of indium in chloride and perchlorate containing chloride solutions is higher than the rate in perchlorate solutions, due to the activating action of chloride ions and greater stability of chloride complexes of indium. The higher the pH of the solution, the higher the oxidation rate of indium is. It can be explained, apparently, by participation of hydroxyl ions in the formation of metal complexes with components in electrolyte, which leads to increase of their stability. Based on the corrosion diagrams of rough indium in electrolytes of different compositions by varying the temperature, the values of the activation energy of the studied process, indicating the diffusion nature of indium oxidation in chloride and perchlorate-containing chloride solutions and the kinetic nature of this reaction in perchlorate electrolytes. Analysis of values of activation energy of ionization of indium and modified bismuth-indium electrodes showed that depressant additive does not influence the nature of the rate-limiting step of the process.
1 Li S. T, Qiao X L, Chen J G et al (2006) Rare Metals 25:359-364. http://dx.doi.org/10.1016/S1001-0521(06)60068-5
2 Bandara J, Wansapura P T, Jayathilaka S P B (2007) Electrochim Acta 52:4161-4166. http://dx.doi.org/10.1016%2Fj.electacta.2006.11.036
3 Araki N, Obata M, Ichimura A et al (2005) Electrochimic Acta 51:677-683. http://dx.doi.org/10.1016/j.electacta.2005.05.030
4 Zhou H, Li W (2005) Journal of Chinese Society for Corrosion and Protection 25:25-29.
5 Morales A E, Zaldivar M H, Pal U (2006) Opt Mater 29:100-104. http://dx.doi.org/10.1016/j.optmat.2006.03.010
6 Ozer S, Besikci C (2005) J PHYS D APPL PHYS 36:559-563. http://dx.doi.org/10.1088/0022-3727/36/5/321
7 Keyvani A, Masoud E, Mohsen S et al (2005) Iranian Journal of Chemistry and Chemical Engineering 24:1-8.
8 Ahmed Diab, Salah Abd El Wanees (2014) American Journal of Physical Chemistry 3:33-40. http://dx.doi.org/10.11648/j.ajpc.20140303.12
9 Paramasivam M, Jayachandran M, Venkatakrishna S (2003) J Appl Electrochem 33:303-309. http://dx.doi.org/10.1023/A:1024141918663
10 Zein El Abedin S, Saleh AO (2004) J Appl Electrochem 34:331-335. http://dx.doi.org/10.1023/B:JACH.0000015611.65219.64
11 Perez Martin G, O’Keefe Matthew J et al (2007) J Appl Electrochem 37:225-231. http://dx.doi.org/10.1007/s10800-006-9239-3
12 Hebing Zhou, Mengqing Xu, Qiming Huang et al (2009) J Appl Electrochem 39:1739-1744. http://dx.doi.org/10.1007/s10800-009-9868-4
13 Rakhymbay G, Nauryzbayev MK, Burkitbayeva BD, Argimbaeva AM, Kurbatov AP, Vacandio F (2014) Eurasian Chemico-Technological Journal 16:287-291. http://dx.doi.org/10.18321/ectj7
14 Malyucheva OI (1991) The kinetics and mechanism of electrode processes involving indium complexes (III) [Kinetika i mehanizm elektrodnyih protsessov s uchastiem kompleksov indiya (III)]. Abstract of dissertation for Candidate of Chemical Sciences Degree]. Kazan, Russia. (In Russian)
15 Keshe G (2004) Corrosion of metals. Physico-chemical principles and actual problems [Korroziya metallov. Fiziko-himicheskie printsipyi i aktualnyie problemyi]. Metallurgiya, Moscow, Russia. (In Russian)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.