Pb 기판/활물질 계면의 부식층형성에 미치는 합금원소영향

• Published in: Biuletyn Uniejowski Vol. 40; no. 5; pp. 225 - 233
• Main Authors: 오세웅(Se-Woong Oh), 최한철(Han-Cheol Choe)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2007
• Subjects: 기계공학; Lead-Calcium; Life cycle; Grid alloys; Lead/acid batteries; Corrosion layer
• ISSN: 1225-8024; 2299-8403; 2288-8403

Effects of alloying elements on the corrosion layer formation of Pb-grid/active materials interface has been researched for improvement of corrosion resistance of Pb-Ca alloy. For this research, various amounts of alloying elements such as Sn, Ag and Ba were added to the Pb-Ca alloys and investigated their corrosion behaviors. Batteries fabricated by using these alloys as cathode grids were subjected to life cycle test. Overcharge life cycle test was carried out at $75^{\circ}C$, 4.5 A, for 110 hrs. with KS standard (KSC 8504). And then, after keeping the battery with open circuit state for 48 hr, discharge was carried out at 300A for 30 sec. Corrosion morphology and interface between Pb-grid and active materials were investigated by using ICP, SEM, WDX, and LPM. Corrosion layer of Pb-Ca alloy got thicken with increasing Ca content. For Pb-Ca-Sn alloy, thickness of corrosion layer decreased as Sn and Ag content increased gradually. In case of Pb-Ca-Sn-Ba alloy, thickness of corrosion layer decreased up to 0.02 wt% Ba addition, whereas, it was not changed in case of above 0.02 wt% Ba addition.