The influence of solute depleted zones on the stress-corrosion susceptibility of aged Al-7.2 mass % Mg and Al-4.4 mass % Cu alloys

Abstract

The influence on stress-corrosion susceptibility of the measured solute de­pleted zone associated with grain boundary precipitation has been studied. The behaviour has been explained in terms of a simple electrochemical model that is consistent with in situ localized grain boundary corrosion potential measurements and explains the kinetics of stress-corrosion crack initiation in these alloys.