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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.
When an aluminum surface is in electrical contact with a metal of different electron potential and dipped in an electrolyte, the flow of electricity between the two metals causes galvanic corrosion. If the aluminum conductor is connected with steel nut bolts, and there is a saltwater ingress in the crevice, then galvanic corrosion causes deterioration of the aluminum. Share this: Related Terms