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Type: Artigo de periódico
Title: Hot corrosion resistance of a Pb-Sb alloy for lead acid battery grids
Author: Osorio, WR
Aoki, CSC
Garcia, A
Abstract: The aim of this study was to evaluate the effects of the microstructural morphologies of a Pb-6.6 wt%Sb alloy on the resulting corrosion resistance in a 0.5 M H(2)SO(4) solution at different temperatures: environment temperature, 50,C and 70 degrees C. A water-cooled unidirectional solidification system was employed permitting a wide range of microstructures to be analyzed. Electrochemical impedance spectroscopy (EIS) diagrams, potentiodynamic polarization curves and an equivalent circuit analysis were used to evaluate the corrosion behavior of the Pb-Sb alloy samples. It was found that with increasing temperatures the general corrosion resistance of Pb-Sb dendritic alloys decreases, and that independently of the working temperature finer dendritic spacings exhibit better corrosion resistance than coarser ones. (C) 2008 Elsevier B.V. All rights reserved.
Subject: Pb-Sb alloys
Battery grids
Solidification microstructure
Hot corrosion
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Power Sources. Elsevier Science Bv, v. 185, n. 2, n. 1471, n. 1477, 2008.
Rights: fechado
Identifier DOI: 10.1016/j.jpowsour.2008.08.040
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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