Observations on the Mechanisms and Kinetics of Aqueous Aluminum Corrosion (Part 1—Role of the Corrosion Product Film In the Uniform Aqueous Corrosion of Aluminum)

Several experiments are; discussed from the standpoint of their implications on the role of the corrosion product film formed on aluminum during uniform aqueous corrosion both as the principal form of corrosion and as a prelude to intergranular penetration. The experiments include barrier film measurements, the effect of an applied potential on corroding aluminum, the effect of various ions and combinations of ions in dilute aqueous solutions on the uniform corrosion, x-ray diffraction studies of corrosion product films,, and several comparisons between air oxidation studies and aqueous corrosion studies. Conclusions are given on the composition and structure of aluminum corrosion product film and the role it plays in controlling uniform aqueous corrosion. 3.4.3