The anodic dissolution of tin in acidic chloride solutions

Johnson, James W.; Liu, E.C.

doi:10.1016/0022-5088(74)90220-3

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…The acceleration of Sn dissolution in strong acidic electrolytes might be due to adsorption of aggressive Br − ions at active sites of Sn surface, followed by the formation of soluble complexes transferred into the solution. As previously stated by Johnson and Liu [ 29 ], such complexing processes decrease the metallic ions concentration retarding the formation of the oxide passive layer. However, at around −0.35 V vs. Ref, a minimum peak current could be observed on the polarization curves obtained in strong acidic KBr solution, both in the absence and in the presence of Br 2 .…”

Section: Resultsmentioning

confidence: 68%

Dissolution of Metals in Different Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations

et al. 2020

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The dissolution of the main metals (Cu, Zn, Sn, Pb and Fe) found in waste printed circuit boards (WPCBs) was investigated by electrochemical corrosion measurements (potentiodynamic polarization and electrochemical impedance spectroscopy (EIS)) in different bromide-based systems that could be used as lixiviants in hydrometallurgical route of metals recovery. The analysis of the corrosion products was carried out by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. All measurements showed that the addition of bromine in the electrolyte favors to great extents the dissolution process of all studied metals as compared to bromine-free electrolytes. In the investigated experimental conditions, the highest dissolution rates of the metals were obtained in acidic KBr solution containing 0.01 mol/L bromine and they decreased in the following order: Zn >> Sn > Pb > Fe > Cu. The XRD and XPS chemical assessment allowed the identification of the dissolution products formed on the metallic surfaces after exposure to the electrolytes. They consisted mainly of oxides in the case of Cu, Zn, Sn and Fe, while the presence of PbBr2 was also noticed on the lead surface. Based on the results of EIS and surface investigations, several models explaining the corrosion behavior of the metals were proposed and discussed. The obtained results demonstrate that all studied metals could be successfully leached using brominated solutions, providing a viable alternative for the selective and efficient recovery of the base metals from WPCBs through a multi-step hydrometallurgical processing route.

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Section: Resultsmentioning

confidence: 68%

Dissolution of Metals in Different Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations

et al. 2020

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“…Liu[34] estudaram a dissolução do estanho em soluções de ácido clorídrico em valores de pH ~ 2,9, empregando ensaios estacionários e medidas de número de oxidação. Os valores aparentes dos números de IV) e posterior dissolução do mesmo.…”

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Caracterização eletroquímica e eletromodificação de superfícies de estanho em meio bicarbonato

Mosca¹

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The active dissolution of tin in acidic chloride electrolyte solutions ? a rotating disc study

Stirrup

Hampson

1976

J Appl Electrochem

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The anodic dissolution of tin in acidic chloride solutions

Cited by 10 publications

References 3 publications

Dissolution of Metals in Different Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations

Dissolution of Metals in Different Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations

Caracterização eletroquímica e eletromodificação de superfícies de estanho em meio bicarbonato

The active dissolution of tin in acidic chloride electrolyte solutions ? a rotating disc study

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