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Aluminium (or aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.
The introduction of these methods for the mass production of aluminium led to extensive use of the light, corrosion-resistant metal in industry and everyday life. Aluminium began to be used in engineering and construction. In World Wars I and II, aluminium was a crucial strategic resource for aviation.
How the Metal Was Discovered. Scientists and technologies associated with the first attempts to produce pure aluminium; the beginning of the industrial production of the metal and birth of aluminium manufacturing in different countries of the world; use of cryolite; deployment of aluminium in the 19th century; first machine-made aluminium products.
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Pure aluminium remained scarce until industrial production began in 1856; since the 1886 discovery of the Hall–Héroult process, production has grown exponentially. Engineering and construction applications began in the first half of the 20th century; aluminium was a vital strategic resource for aviation during both world wars.
Technical illustration is the use of illustration to visually communicate information of a technical nature. Technical illustrations can be component technical drawings or diagrams . The aim of technical illustration is "to generate expressive images that effectively convey certain information via the visual channel to the human observer".