ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/2
FIGURE 2-1 Stress corrosion cracking
(2)
Bi-metallic Corrosion. This generally occurs on aluminum alloy components in contact with steel
fastenings where the protective finish has been damaged (fig. 2-2).
FIGURE 2-2 Bi-metallic corrosion
(3)
Exfoliation (or layer) Corrosion. This is a less common form of corrosion occurring in alloys with copper or
magnesium content. It is often the cause of flaking paintwork (fig. 2-3).
2-3
