Abstract
In the present study, the effect of sodium chloride concentration on corrosion fatigue strength and of a high-strength aluminum alloy, 7075-T651 were investigated. An atomic force microscopy (AFM) was used for surface analyses of specimens. Plane bending tests were conducted in 0.1% and 3% NaCl solution, the fatigue life was not affected by the concentration. From the optical microscopy, cracks were observed to be initiated from corrosion pits, while they were initiated before corrosion pits initiation when they were observed with AFM.
