Influence of silver on the anodic corrosion and gas evolution of Pb–Sb–As–Se alloys as positive grids in lead acid batteries

Tizpar, A.; Ghasemi, Zahra

doi:10.1016/j.apsusc.2005.09.020

Cited by 14 publications

(2 citation statements)

References 10 publications

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“…3 Moreover, Ag reduces the oxidation of PbSO 4 to PbO 2 , leading to less PbO 2 content, and decreases the O 2 overvoltage, which takes place in the gel zone. [4][5][6] It is widely known that the lead anodes used in electrowinning can corrode when the current is switched on after an interruption. This phenomenon can be explained in terms of the loss of the anode passivity that takes place in the absence of applied current.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical impedance spectroscopy evaluation of behaviour of Pb–Ag anodes for zinc electrowinning

Zhang

Bounoughaz

Ghali

et al. 2013

Corrosion Engineering, Science and Technology

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Pb-0?5-0?7Ag anodes are widely used in the industry of zinc electrowinning. Two commercial lead anodes containing 0?56 and 0?69%Ag were studied by electrochemical impedance spectroscopy to evaluate their electrochemical activity. An industrial acid zinc sulphate electrolyte containing glue and chloride ion, but without manganese addition, was considered. In this study, 5 h of electrolysis at a density of 50 mA cm 22 (currently used in practice) and also 6 h of potential decay were made to represent electrowinning periods of maintenance both at 38uC. During the 5 h polarisation, the average double layer capacity of Pb-0?56Ag alloy was higher (y9%) than that of Pb-0?69Ag alloy. During the first hour of potential decay, the Warburg impedance controls the electrochemical reaction. For the period from the second to sixth hour, the double layer capacity decreased with immersion time, and the charge transfer resistance increased with time. During the potential decay, the average charge transfer resistance of Pb-0?69Ag anode was higher (y52%) than that of Pb-0?56Ag anode.

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Section: Introductionmentioning

confidence: 99%

Electrochemical impedance spectroscopy evaluation of behaviour of Pb–Ag anodes for zinc electrowinning

Zhang

Bounoughaz

Ghali

et al. 2013

Corrosion Engineering, Science and Technology

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show abstract

“…The standard anode in the zinc industry is cast Pb-Ag alloy, typically containing 0.25 wt.% to 1.0 wt.% silver [1]. Many researchers proved that alloying additives of Ag decreases the overvoltage of the oxygen evolution reaction, makes the grains finer and enhances the corrosion resistance of the alloy [2,3]. However, Ag is precious metals and increases the cost of anode dramatically.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Nd on Lead Anode for Zinc Electrowinning

Zhong

Hong

et al. 2012

AMR

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A detailed investigation of the effects of Nd on the microstructure, mechanical properties and electrochemical properties of lead anode in 160g.L-1 at 35°C was carried out. Galvanostatic polarization and Chronopotentiometry (CP) were used to study the electrochemical behavior ( such as anodic potential, corrosion rate and the composition of passive film) of the Pb and Pb-Nd anodes. The metallographic structure and passive film morphology of Pb and Pb-Nd anodes were observed and analyzed using polarizing microscope and scanning electronic microscopy (SEM), respectively. The experimental results show the grains become smaller and aggregation of PbxNdy become severe as the content of Nd increases. The addition of Nd enhances the formation of PbO2, inhibits the formation of PbSO4 and PbO and reduces the anodic potential. However, Holes presenting on rough passive film of high Nd content Pb-Nd anodes accelerate the corrosion.

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Grafting of poly[(methyl methacrylate)- block -styrene] onto cellulose via nitroxide-mediated polymerization, and its polymer/clay nanocomposite

Karaj-Abad

Abbasian

Jaymand

2016

Carbohydrate Polymers

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Influence of silver on the anodic corrosion and gas evolution of Pb–Sb–As–Se alloys as positive grids in lead acid batteries

Cited by 14 publications

References 10 publications

Electrochemical impedance spectroscopy evaluation of behaviour of Pb–Ag anodes for zinc electrowinning

Electrochemical impedance spectroscopy evaluation of behaviour of Pb–Ag anodes for zinc electrowinning

The Effects of Nd on Lead Anode for Zinc Electrowinning

Grafting of poly[(methyl methacrylate)- block -styrene] onto cellulose via nitroxide-mediated polymerization, and its polymer/clay nanocomposite

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