"A L C L A D" A New Corrosion Resistant Aluminum Product
This is a technical report from the NASA Technical Reports Server, dated 1927, on Alclad, a corrosion-resistant aluminum sheet product, prepared for engineers and metallurgists. The three pictures are magnified metallographic photographs: a cold-chisel indentation in 18-gauge sheet, a welded section, and a grain-boundary corrosion pattern, all rendered in high-contrast black and white with printed captions beside them. A designer could draw on their stark tonal contrast and the dense, organic textures of etched metal grain.
