Advantages of Oxide Films as Bases for Aluminum Pigmented Surface Coatings for Aluminum Alloys
This is a 1931 technical report from the NASA Technical Reports Server, a government aeronautical research paper on coatings for aluminum alloys, written for engineers and metallurgists. Its pictures are plain charts and photographs: line graphs of tensile strength and elongation against corrosion period in days, plus close-up surface photographs of corroded aluminum specimens in grey tones, useful to a designer for the look of weathered metal and of tonal gradation across rough textured panels.
