Title :
The corrosion behavior of positive grids with lead calcium aluminum alloys in VRLA/AGM cells and monoblocs. Test results with up to 2% tin and 0.05% silver additions
Author :
Giess, H. ; Ohlin, C.
Author_Institution :
Accumulatoren-Frabik Oerlikon, Zurich, Switzerland
Abstract :
Accelerated aging tests of VRLA batteries show the excellent corrosion resistance of a PbCaAl alloy with an addition of 2% Sn. This grid alloy shows a large grain microstructure and very reduced amounts of secondary recrystallization with little coarse (Pb1-x Sn x)3Ca precipitate. The increase of the tin content from 0.7% to 2.0% results in an approximate doubling of VRLA service life as deducible from the accelerated float life test at 60°C (140°F). The addition of 0.05%Ag does not improve the corrosion resistance of a PbCaAl-2%Sn alloy
Keywords :
aluminium alloys; calcium alloys; corrosion; crystal microstructure; electrochemical electrodes; grain size; lead alloys; recrystallisation; secondary cells; silver; tin; (Pb1-x Snx)3Ca precipitate; 0.05% silver addition; 140 F; 2% tin addition; 60 C; Pb; Pb-acid valve regulated batteries; PbCaAlAg; PbCaAlSn; VRLA batteries; VRLA/AGM cells; accelerated float life test; corrosion behavior; large grain microstructure; lead calcium aluminum alloys; positive grids; secondary recrystallization; service life doubling; Accelerated aging; Aluminum; Batteries; Calcium; Corrosion; Lead; Life estimation; Microstructure; Testing; Tin;
Conference_Titel :
Telecommunications Energy Conference, 1996. INTELEC '96., 18th International
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-3507-4
DOI :
10.1109/INTLEC.1996.573336
