Pb-Ca-Sn-Ba Grid Alloys for Valve-Regulated Lead Acid Batteries
- 1 Department of Physical Chemistry, Saratov State University Named after N. G. Chernyshevsky, Saratov, Russia
- 2 Department of Physical Chemistry, Saratov State University Named after N. G. Chernyshevsky, Saratov, Russia
- 3 Department of Physical Chemistry, Saratov State University Named after N. G. Chernyshevsky, Saratov, Russia
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 explor ing the oxidation process and characteriz ing the formed corrosion layer. According to our results, barium introduction into lead - tin - calcium alloys increases their hardness, reduce s 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.
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