Battery terminal
What causes the positive terminal to develop the powdery corrosion?
Forum Discussion
I believe the sulfate has a negative charge so any that emerges from the battery could be attracted more to the positive terminal. Or the terminal seal itself could be broken and sulfate is creeping up out of the case. The white stuff is lead sulfate as the terminal corrodes.
Best to fill the battery to 1/8" to 1/4" below the split ring. Just touching is absolute max. Keep battery float voltages under 13.5 during storage. Temperature compensated is best. Older batteries gas more. An automatic equalization cycle (14.8+ volts) when fully charged may also cause additional gassing.
Use a spray on cleaner, lots and lots of water. lead sulfate is water soluble. Then reassemble and use a spray on protectant. The felt washer may help if some is pushing up around the terminal. Any decent autoparts store has the stuff you need.
Good luck
Best to fill the battery to 1/8" to 1/4" below the split ring. Just touching is absolute max. Keep battery float voltages under 13.5 during storage. Temperature compensated is best. Older batteries gas more. An automatic equalization cycle (14.8+ volts) when fully charged may also cause additional gassing.
Use a spray on cleaner, lots and lots of water. lead sulfate is water soluble. Then reassemble and use a spray on protectant. The felt washer may help if some is pushing up around the terminal. Any decent autoparts store has the stuff you need.
Good luck
