Journal article
Effect of halides in the electrowinning of zinc. II. Corrosion of lead-silver anodes
Hydrometallurgy, Vol.173, pp.178-191
2017
Abstract
This paper summarizes experimental results obtained from a series of laboratory scale electrowinning tests conducted over 5 months to quantify the effects of halides (chloride, fluoride and bromide) on the performance and corrosion of lead-silver anodes under conditions similar to those used during the electrowinning of zinc. The parameters investigated include operating anode potential, corrosion rate and anode scale/cell mud generation rates. Information was also obtained on the consumption of halides and manganese ions and the composition of the anode scale and cell mud.
The results have confirmed plant observations of excessive anode corrosion and chlorine emissions at a chloride concentration of 400 mg/L but not at a concentration of 200 mg/L. It has also confirmed the importance of maintaining a suitable manganese(II) concentration in the electrolyte. Bromide and fluoride ions, albeit at lower concentrations, do not have measurable effects on anode corrosion.
Although a definitive explanation for enhanced local corrosion at high chloride concentrations has not been advanced, the nature of the accelerated corrosion suggests that a crevice-like corrosion process is responsible for localized massive corrosion. This has been attributed to the presence of high acidity and permanganate ions between the manganese oxide layer and the alloy surface.
Details
- Title
- Effect of halides in the electrowinning of zinc. II. Corrosion of lead-silver anodes
- Authors/Creators
- M. Nicol (Author/Creator) - Murdoch UniversityC. Akilan (Author/Creator) - Murdoch UniversityV. Tjandrawan (Author/Creator) - Murdoch UniversityJ.A. Gonzalez (Author/Creator) - Teck (Canada)
- Publication Details
- Hydrometallurgy, Vol.173, pp.178-191
- Publisher
- Elsevier BV
- Identifiers
- 991005540004407891
- Copyright
- © 2017 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
127 File views/ downloads
100 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- International collaboration
- Citation topics
- 2 Chemistry
- 2.210 Corrosion & Deposition Chemistry
- 2.210.2222 Lead-Acid Battery
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science