TITLE:
Pb-Ca-Sn-Ba Grid Alloys for Valve-Regulated Lead Acid Batteries
AUTHORS:
Marina M. Burashnikova, Irina V. Zotova, Ivan A. Kazarinov
KEYWORDS:
Lead-Acid Battery; Lead Alloys; Barium; Corrosion Layer
JOURNAL NAME:
Engineering,
Vol.5 No.10A,
September
25,
2013
ABSTRACT:
The effect of barium
additives on the process of anodic corrosion of lead-tin-calcium
alloys in a 4.8 М sulfuric acid solution was studied. Cyclic voltammetry, impedance
spectroscopy, weight loss measurements and scanning electronic microscope analysis
have allowed exploring the oxidation process and characterizing the formed corrosion
layer. According to our results, barium introduction into lead-tin-calcium
alloys increases their hardness, reduces their electrochemical
activity, and improves their corrosion stability. Reduction of the calcium
content in the alloy can be compensated by adding barium. Barium dopation at
lead-tin-calcium alloys decreases the resistance of the oxide layer formed on
the grid surface, in a deeply discharged state, and raises its resistance
during floating conditions and at a charged state of the positive electrode.