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What causes batt post build up like this? (see pic) 200 1980

2 different types of plate materials for positive and negative. Lead peroxide vs lead antimony if i remember correctly.
The negative plate always seemed to gather corrosion better than the positive plate. I think it is a oxygen and humidity thing combining with the particular lead alloy
In the five thousand or so batteries I have changed it was always the neg plate that gathered chalk.
Nasty stuff when it gets in your eye, up your nose or heaven forbid if you do not wash reallllly well before going to the washroom you will leave burning finger prints where fingerprints should not be.
--
73 ES, 91 240, 98 S90






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