2018
DOI: 10.1007/s11356-018-1443-2
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Influence of Mn2+ ions on the corrosion mechanism of lead-based anodes and the generation of heavy metal anode slime in zinc sulfate electrolyte

Abstract: The influence of Mn ions on the generation of heavy metal anode slime during zinc electrolysis industry was extensively investigated using several electrochemical methods, electron microscope technologies, and particle size analysis. Results showed that the Mn could obviously promote oxygen evolution reaction (OER) and thereby weaken oxidation efficiency of Mn (η) and dissolution of Pb. The significant improvement in kinetic parameters for OER was found in electrolytes of 1 and 3 g/L Mn, but became unstable as… Show more

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Cited by 14 publications
(5 citation statements)
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“…This led to lead contamination and the occurrence of hydrolysis sludge, which would affect the purity of the electrolytic product. 9 For the microstructure of the MnO 2 layer on the Ti/Ti 4 O 7 anode ( Figure 7 b), the surface of MnO 2 was smooth and dense, which uniformly covered the surface of the anode. This physically isolated the Ti/Ti 4 O 7 substrate from the electrolyte and effectively improved the corrosion resistance of the anode coating.…”
Section: Resultsmentioning
confidence: 96%
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“…This led to lead contamination and the occurrence of hydrolysis sludge, which would affect the purity of the electrolytic product. 9 For the microstructure of the MnO 2 layer on the Ti/Ti 4 O 7 anode ( Figure 7 b), the surface of MnO 2 was smooth and dense, which uniformly covered the surface of the anode. This physically isolated the Ti/Ti 4 O 7 substrate from the electrolyte and effectively improved the corrosion resistance of the anode coating.…”
Section: Resultsmentioning
confidence: 96%
“…The microstructure of the MnO 2 layer on the Pb anode is shown in Figure a, and a rough and porous surface and fluffy accumulation of the manganese oxide layer were observed. This led to lead contamination and the occurrence of hydrolysis sludge, which would affect the purity of the electrolytic product . For the microstructure of the MnO 2 layer on the Ti/Ti 4 O 7 anode (Figure b), the surface of MnO 2 was smooth and dense, which uniformly covered the surface of the anode.…”
Section: Resultsmentioning
confidence: 99%
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“…4a and 4b indicated Tafel plots of OER, and presented two distinct linear segments in the low-potential and high-potential regions due to partially evolved O 3 . 46,47 The Tafel formula was calculated for both slopes and exchange current densities based on the data of the low-potential region in Table I.…”
Section: Resultsmentioning
confidence: 99%