Evaluation of AA 7075-T6 Alloy’s Corrosion Behavior Using Salt Spray Test

AA7075-T6 is a precipitated hardened alloy widely used in aerospace, defense, marine, and automotive industries. The corrosion evolution of this alloy was studied using the salt mist test at two different temperatures. The resistance to pitting corrosion was determined by various tests of relative mass loss, the surface density of the pitting points, and electrical conductivity. The corroded samples were analyzed by optical microscopy in order to count the number of points per surface element. Statistical analysis revealed that the density of the points follows an exponential law. The electrical conductivity decreases with time.