Microradiographic and Foil Penetration Methods for Quantification of Localized Corrosion

Early detection of corrosion is important to prevent fatigue crack initiation and to decrease the cost of aircraft repair. It is well known that the depth of pitting corrosion plays an important role in fatigue crack initiation and fatigue life Figure 1 illustrates a significant reduction of fatigue life versus pit depth in Al 2024-T3 alloy [1]. Therefore, it is important to have nondestructive means for detecting corrosion pitting and measuring of its depth.