EIS-in situ characterization of anodic films on antimony and lead–antimony alloys

Metikoš‐Huković, Mirjana; Babić, Ranko; Brinić, Slobodan

doi:10.1016/j.jpowsour.2005.07.079

Cited by 29 publications

(18 citation statements)

References 32 publications

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“…Según la bibliografía y los datos obtenidos, en la superficie de las probetas expuestas, se pueden encontrar los compuestos más comunes que son el dióxido de plomo (PbO2) y el sulfato de plomo (PbSO4), pero debido a la porosidad de la capa de sulfato de plomo registrada para concentraciones de electrolito de 0.5 M de H2SO4, la contribución eléctrica de la doble capa puede ser despreciada [11], por lo tanto, en el análisis del circuito equivalente el aporte de la interfase electrolito-sulfato de plomo es mínimo.…”

Section: Figura 10unclassified

Velocidad de corrosión de una aleación base plomo en una solución de ácido sulfúrico a diferentes temperaturas

et al. 2014

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RESUMENLas baterías de automóviles no solo son afectadas por el uso y desgaste, sino también por otros factores como la concentración del electrolito, la pérdida de agua y la temperatura a la que puede estar expuestas, siendo este último el factor de mayor influencia permitiendo así un incremento en la velocidad de corrosión en las aleaciones de plomo (componentes de la batería) afectando a su vez el tiempo de servicio. Por consiguiente, para la industria de las baterías de automóviles tipo plomo-ácido, es muy importante estudiar el efecto de la temperatura en el funcionamiento de las placas negativa y positiva, durante el proceso de carga y descarga que se llevan a cabo en las baterías durante su vida útil, y además, al estar expuesta a un electrolito de ácido sulfúrico.De acuerdo a lo anterior, en este trabajo de grado se estudió la influencia de la temperatura en la velocidad de corrosión sobre la aleación plomo-antimonio, a través de las técnicas electroquímicas: espectroscopia de impedancia electroquímica (EIS), extrapolación de Tafel, curva potenciodinámica y voltametría cíclica. Las pruebas se realizaron a uno y cinco días de exposición en ácido sulfúrico 0.5 M, a temperaturas de 25 y 65°C en una celda plana con intercambiadores de calor para controlar la temperatura en el equipo GAMRY 600. Los potenciales fueron medidos respecto al electrodo de referencia de calomel saturado, y se utilizó como electrodo auxiliar una barra de grafito. Por último, se realizó un análisis de los productos de corrosión formados por medio de microscopía electrónica de barrido (SEM).Palabras clave: Baterías Tipo Plomo-ácido, Velocidad de Corrosión, Temperatura, técnicas electroquímicas. ABSTRACTCar batteries are not only affected by their use and wear but also by other factors such as electrolyte concentration, water loss and temperature that can be exposed, the latter being the most influential factor causing an increase in the corrosion rate of lead alloys (battery components), and affecting their service time. Therefore, for the industry of automobile batteries lead-acid type is very important to study the effect of temperature on the functioning of positive and negative grids during charging and discharging, which are carried out in batteries lifetime to be exposed to the sulfuric acid electrolyte.According to all of the above described, in this research work the influence of temperature in the corrosion rate of lead-antimony alloy was studied by electrochemical techniques: Electrochemical impedance spectroscopy (EIS), Tafel extrapolation, curve potentiodynamic and cyclic voltammetry. The tests were performed for exposure times of one and five days at temperatures of 25 and 65°C in sulfuric acid 0.5 M in flat cell with heat exchangers to control the temperature in the machine GAMRY 600. The potentials were measured regard to the calomel saturated reference electrode and a graphite bar was need as auxiliary electrode. Finally, the corrosion products formed were examined by a test of scanning electron microscopy (SEM).

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Section: Figura 10unclassified

Velocidad de corrosión de una aleación base plomo en una solución de ácido sulfúrico a diferentes temperaturas

et al. 2014

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“…6(b). This effect normally occurs in the case of a severe corrosive condition [32]. Origin of the inductance can generally be influenced by some adsorbed intermediates or can be attributed to a space at the interfaces [33].…”

Section: Effect Of Temperature On Potentiodynamic Polarizationmentioning

confidence: 99%

Electrochemical passive properties of AlxCoCrFeNi (x = 0, 0.25, 0.50, 1.00) high-entropy alloys in sulfuric acids

Chen¹

2012

Corrosion Resistance

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“…The E-i data in the potential range 1.4-1.8 V were used to construct Tafel plots for OER. The parts of the potentiodynamic curves for the reduction of PbO 2 to Pb 2+ species at peak C1 [19,22,23,28] is showed in Fig. 5.…”

Section: Oxygen Evolution Kinetics On Positive Gridsmentioning

confidence: 99%

“…In this region, a sharp decrease in C to a minimum and a sharp increase in R to a maximum occur, due to the formation of a highly insulating inner PbO film beneath the PbSO 4 layer. 21,22,28,30) The compact PbSO 4 film is assumed to retard the diffusion of H 2 SO 4 through the barrier film and consequently, pH value increases at the alloy/ PbSO 4 interface and the formation of PbO becomes favorable.…”

Section: Galvanostatic Charging/discharging Of Positive Gridsmentioning

confidence: 99%

Evaluation of Tolerance of Some Elemental Impurities on Performance of Pb-Ca-Sn Positive Pole Grids of Lead-Acid Batteries

El-Rahman¹,

Gad‐Allah²,

Salih³

et al. 2012

Journal of Electrochemical Science and Technology

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:The electrochemical performance of positive pole grids of lead-acid batteries made of Pb-0.08%Ca-1.1%Sn alloys without and with 0.1 wt% of each of Cu, As or Sb and with 0.1 wt% of Cu, As and Sb combined was investigated by electrochemical methods in 4.0 M H 2 SO 4 . The corrodibility of alloys under open-circuit conditions and constant current charging of the positive pole, the positive pole gassing and the self-discharge of the charged positive pole were studied. All impurities (Cu, As, Sb) were found to decrease the corrosion resistance, R corr after 1/2 hour corrosion, but after 24 hours an improvement in R corr was recorded for Sb containing alloy and the alloy with the three impurities combined. While an individual impurity was found to enhance oxygen evolution reaction, the impurities combined significantly inhibition this reaction and the related water loss problem was improved. Impedance results were found helpful in identification of the species involved in the charging/discharging and the self-discharge of the positive pole. Impurities individually or combined were found to increase the self-discharge during polarization (33-68%), where Sb containing alloy was the worst and impurities combined alloy was the least. The corrosion of the positive pole grid in the constant current charging was found to increase in the presence of impurities by 5-10%. Under open-circuit, the self-discharge of the charged positive grids was found to increase significantly (92-212%) in the presence of impurities, with Sb-containing alloy was the worst. The important result of the study is that the harmful effect of the studied impurities combined was not additive but sometimes lesser than any individual impurity.

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EIS-in situ characterization of anodic films on antimony and lead–antimony alloys

Cited by 29 publications

References 32 publications

Velocidad de corrosión de una aleación base plomo en una solución de ácido sulfúrico a diferentes temperaturas

Velocidad de corrosión de una aleación base plomo en una solución de ácido sulfúrico a diferentes temperaturas

Electrochemical passive properties of AlxCoCrFeNi (x = 0, 0.25, 0.50, 1.00) high-entropy alloys in sulfuric acids

Evaluation of Tolerance of Some Elemental Impurities on Performance of Pb-Ca-Sn Positive Pole Grids of Lead-Acid Batteries

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