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1 Fretting corrosion is primarily a surface damage phenomenon occurring as a result of small cyclic movements between two materials caused by cyclic loading. Fretting damage can occur in vacuum, although it then would be better to speak of fretting, rather than fretting corrosion.
Overcharging by the alternator and bad contact between the terminals can cause battery corrosion. Keeping the terminals clean and tight will prevent the corrosion from bad contacts. An old battery that is in bad shape or a faulty alternator can cause the overcharging. Below is a link for cleaning battery corrosion. Source(s): http://www.diybuildingandrepairs.com/auto-repairs/how-to-clean-battery-corrosion.html.