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Abstract
The aim of this study is to find out the microstructure, hardness, and corrosion resistance of Pb-5%Sb spine alloy. The alloy has been produced by high pressure die casting (HPDC), medium pressure die casting (AS) and low pressure die casting (GS) methods, respectively. The microstructure was characterized by using optical microscopy and scanning electron microscopy (SEM). The hardness was also reported. The corrosion resistance of the spines in 0.5M H2SO4 solution has been analyzed by measuring the weight loss, impedance spectroscopy and the potentiodynamic polarization techniques. It has been found that the spine produced by HPDC has defect-free fine grain structure resulting improvement in hardness and excellent corrosion resistance.
Highlights
Lead acid batteries are the most widely used battery system in several applications [1]
The eutectic fraction increases with the solute (Sb) content in the alloy (Pb-Sb) as shown in the phase diagram of Fig 3, which has been extracted from the work that has done by H
The electrochemical behavior of lead-acid battery spines (Pb-5%wt Sb alloy) were investigated in 0.5M H2SO4 solution employing the loss in weight, potentiodynamic polarization and impedance spectroscopy measurements
Summary
Lead acid batteries are the most widely used battery system in several applications [1]. The ability of lead batteries to supply high surge currents at relatively lost cost makes it attractive for use in several applications especially in automobiles, where high current is required for the motors to start [2]. Small amounts of elements like arsenic and selenium are usually added to the lead antimony alloys to improve the grain refinement, fluidity and age hardening of the grids. It has been found reported [3] that that the content of Sb in Pb-Sb alloys significantly increases the mechanical properties and electrochemical process of the positive plate of the battery. The influence of Sb on electrochemical behaviour in Pb-Sb alloys has been widely studied during last few decades [4,5,6,7]
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