Electrochemical and Mechanical Behavior of Lead-Silver and Lead-Bismuth Casting Alloys for Lead-Acid Battery Components

Osório, Wislei R.; Peixoto, Leandro C.; Garcia, Amauri

doi:10.1007/s11661-015-3023-0

Cited by 16 publications

(6 citation statements)

References 19 publications

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“…In the studied alloy, Zn-rich regions in the eutectic mixture act as cathodic regions, whereas the IMCs distributed in the matrix and in the eutectic region act as anodic areas, thus evidencing a galvanic couple. Studies conducted with Zn-Mg alloys having smaller Mg content showed that the decrease in the cathodic area-Ac/anodic area-Aa ratio results in lower corrosion resistance 7,40,41 . For the alloy examined in the present study, the sample P_70mm, with a coarser microstructure, has Aa (IMCs) larger than Ac (eutectic Zn); and, therefore, a greater corrosion rate as compared to that of sample P_10mm.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

et al. 2019

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This study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state conditions of heat extraction. Microstructure characterization, microhardness, linear polarization and electrochemical impedance spectroscopy (EIS) tests were performed. A unique type of microstructure was observed, characterized essentially by a morphology typified by idiomorphic MgZn 2 crystals in a "complex eutectic mixture" [coexistence of stable (Zn+Mg 2 Zn 11 ) and metastable (Zn+MgZn 2 ) eutectics]. The correlation between thermal and microstructural parameters, permitted experimental growth laws, correlating the evolution of the lamellar eutectic spacing with the cooling rate to be established. Vickers microhardness and electrochemical corrosion tests showed that more refined microstructures associated with higher experimental cooling rates, are related to a better set of higher hardness and corrosion resistance.

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Section: Potentiodynamic Polarizationmentioning

confidence: 99%

Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

et al. 2019

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“…Based on the above mechanical performance test, the specific strength is used to evaluate the UHPC in this study. Specific strength means the ratio of concrete compressive strength to density, a critical parameter to characterize the mechanical strength and lightweight effect of materials 63 . Figure 7 displays the variation of specific strength of UHPC with diverse volume rates of ceramsite sand.…”

Section: Resultsmentioning

confidence: 99%

“…Specific strength means the ratio of concrete compressive strength to density, a critical parameter to characterize the mechanical strength and lightweight effect of materials. 63 Figure 7 displays the variation of specific strength of UHPC with diverse volume rates of ceramsite sand. Although the density of steel fiber-reinforced concrete is relatively high, its specific strength is still more significant than that of concrete without steel fiber.…”

Section: Evaluation Of Uhpc With Specific Strengthmentioning

confidence: 99%

Experimental investigation on mechanical property and microstructure of ultra‐high‐performance concrete with ceramsite sand

Zhou

Long

Chaktrimongkol

et al. 2021

Structural Concrete

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As one of the most innovative cement‐based materials, the properties of ultra‐high‐performance concrete (UHPC) have been widely investigated. This paper experimentally studies the effect of ceramsite sand on the properties and microstructure of UHPC to develop a new UHPC with low apparent density. The effects of the volume ratio of ceramsite sand and steel fiber content on the properties of UHPC were also studied. Various experiments, including apparent density, compressive and flexural strength, and microstructural properties were conducted on UHPC with different mixing parameters. The results showed that the addition of 18% ceramsite sand effectively improved the mechanical strength, specific strength, and pore structure as well as the interfacial transition zone of UHPC. Steel fiber and ceramsite sand worked together to make up for the lack of lightweight porous aggregate so that even when 100% ceramsite sand was used to prepare UHPC, the compressive strength of concrete could still exceed 100 MPa, and had a lower apparent density than normal UHPC.

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“…alloys is needed, electrochemical impedance spectroscopy can be used. This method provides data concerning changes on the grid-acidic electrolyte interface, which can be demonstrated in the form of Nyquist or Bode representations [11][12][13][14]. In addition to techniques which allow to analyze and measure the corrosion rate of lead alloys, there are a few known methods to reduce it.…”

Section: Grzegorz Lota Is a Ise Membermentioning

confidence: 99%

Electrochemical properties of positive electrode in lead-acid battery modified by ammonium-based ionic liquids

Gabryelczyk

Kopczyński

Baraniak

et al. 2017

J Solid State Electrochem

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The influence of selected types of ammonium ionic liquid (AIL) additives on corrosion and functional parameters of lead-acid battery positive electrode was examined. AILs with a bisulfate anion used in the experiments were classified as protic, aprotic, monomeric, and polymeric, based on the structure of their cation. Working electrodes consisted of a lead-calcium-tin alloy utilized in the industry for manufacturing current collectors of positive electrodes in lead-acid batteries (LABs). This alloy was used in the first part of the study for the evaluation of corrosion intensity and stability of electrolyte with AIL additives. In the second part, the grid made of the examined alloy was covered with positive active mass, the composition of which was modified by selected AIL. The selection of an appropriate substance was made based on parameters such as corrosion potential, corrosion current, polarization resistance, and hydrogen and oxygen evolution potentials. Techniques such as linear sweep voltammetry, corrosimetry, and electrochemical impedance spectroscopy were used. The conducted measurements revealed that polymeric AIL additive had an exceptionally positive influence on the inhibition of the corrosion process in LAB and electrochemical window of the electrolyte. The influence of this compound on the specific capacity and resistance of the active mass was also discussed.

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Electrochemical and Mechanical Behavior of Lead-Silver and Lead-Bismuth Casting Alloys for Lead-Acid Battery Components

Cited by 16 publications

References 19 publications

Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

Experimental investigation on mechanical property and microstructure of ultra‐high‐performance concrete with ceramsite sand

Electrochemical properties of positive electrode in lead-acid battery modified by ammonium-based ionic liquids

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