Fig. 8From: Corrosion of aircraft heritage: a comparison between modern and historic Duralumin alloysOptical macrographs of the exposed surface and cross-section images of exfoliated samples after EXCO test (96 h). Under the macrographs is indicated the degree of exfoliation following the classification provided by ASTM G34 (Pt = pitting; EA = superficial exfoliation; EB = moderate exfoliation; EC = severe exfoliation; ED = very severe exfoliation)Back to article page