Brasil | Artículos de revistas

Microstructural influence of Pb-0.85wt% Sb casting alloy on its electrochemical behavior

dc.creatorOsorio, WR
dc.creatorRosa, DM
dc.creatorGarcia, A
dc.date2008
dc.dateAPR-JUN
dc.date2014-07-30T14:01:58Z
dc.date2015-11-26T16:35:04Z
dc.date2014-07-30T14:01:58Z
dc.date2015-11-26T16:35:04Z
dc.date.accessioned2018-03-28T23:17:26Z
dc.date.available2018-03-28T23:17:26Z
dc.identifierMateria-rio De Janeiro. Univ Fed Rio De Janeiro, Lab Hidrogenio, v. 13, n. 2, n. 246, n. 257, 2008.
dc.identifier1517-7076
dc.identifierWOS:000269834900002
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/56839
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/56839
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1271395
dc.descriptionThe aim of this study was to examine the effect of cooling rate on the cellular growth of a Pb0.85wt%Sb alloy and to evaluate the influences of cell size and of the corresponding macrosegregation profile on the resultant corrosion behavior. In order to obtain the as-cast samples a water-cooled unidirectional solidification system was used. Such experimental set-up has permitted the development of a clear cellular structural array even for relative high cooling rates and has allowed a wide range of solidification conditions to be analyzed. Microstructural aspects along the casting were characterized by optical microscopy and SEM techniques. The electrochemical impedance spectroscopy technique and potentiodynamic curves (Tafel extrapolation) were used to analyze the corrosion resistance of samples collected along the casting length and immersed in a 0.5M H(2)SO(4) solution at 25 degrees C. It was found that the corrosion current density decreases with increasing cell spacing and that the pre-programming of microstructure cell size can be used as an alternative way to produce as-cast components of Pb-Sb alloys, such as battery grids, with better corrosion resistance.
dc.description13
dc.description2
dc.description246
dc.description257
dc.languagept
dc.publisherUniv Fed Rio De Janeiro, Lab Hidrogenio
dc.publisherRio De Janeiro Rj
dc.publisherBrasil
dc.relationMateria-rio De Janeiro
dc.relationMateria
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectPb-Sb alloy
dc.subjectdirectional solidification
dc.subjectcellular microstructures
dc.subjectelectrochemical behavior
dc.subjectSulfuric-acid-solutions
dc.subjectCorrosion-resistance
dc.subjectDirectional Solidification
dc.subjectImpedance Spectroscopy
dc.subjectAntimony Electrode
dc.subjectAl
dc.subjectSn
dc.subjectMorphology
dc.subjectBattery
dc.subjectZn
dc.titleMicrostructural influence of Pb-0.85wt% Sb casting alloy on its electrochemical behavior
dc.typeArtículos de revistas


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