Fig. 4From: Corrosion of aircraft heritage: a comparison between modern and historic Duralumin alloysBackscattered Electron images of coarse intermetallic particles in the PL0 plane for: (a) 24S historic alloy (P wreck), and in the modern alloys: (b) 2017A(p), (c) 2024(p), (d) 2024(s). Type of particle (for alloys close to 2024) refers to the classification by Birbilis et al. [33]Back to article page