Ramachandran, P. and Balakrishnan, K. (1996) Preconditioning of lead-silver alloy anodes for use in electrowinning of metals. Bulletin of Electrochemistry, 12 (05). pp. 352-354. ISSN 0256-1654

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Abstract

Lead alloys are customarily used in the electrowinning of metals like zinc, copper and chromium, Anode corrosion is one of the problems associated with the lend anodes and it can be reduced by preconditioning the lead anodes and it can be reduced by preconditioning the lead anodes suitably prior to the use In the electrolytic cells. The preconditioning involves anodic treatment of lead electrodes in fluoride solution, where a compact adherent layer of lead dioxide is built up relatively in a shorter time. The anodic films formed under different conditions of the pretreatment process have been characterised by polarisation measurements. A passive film of read fluoride is formed initially followed by propagation of PbO2. The role of fluoride ion ill the formation of lead dioxide is discussed, Fluoride ion is well known for its surface activity and lend dioxide which nucleates over the passive film of PbF2 tends to be adherent, protecting the underlying lead effectively during the use in metal winning cells

Item Type:	Article
Uncontrolled Keywords:	Lead alloy anode; Preconditioning; Polarisation and lead dioxide
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	11 Jun 2012 07:30
Last Modified:	11 Jun 2012 07:30
URI:	http://cecri.csircentral.net/id/eprint/2777

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