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Aluminium
Incidentally, it's also known as \"Aluminum\" as well as \"Aluminium\", but was originally named \"Alumium\" by Sir Humphrey Davy in 1808
Why doesn't aluminium rust? Because the oxide of aluminium that forms when it oxidises in air is the same size as the aluminium metal and so forms a protective layer. In contrast, iron when it oxidises suffers from the fact that the iron oxide produced is much bigger than the iron and forms a destructive RUST!
" text[1] = "Brass
Brass is an alloy of copper and zinc. Harder than copper, it is ductile and can be hammered into thin leaves. Formerly any alloy of copper, especially one with tin, was called brass, and it is probable that the \"brass\" of ancient times was of copper and tin. The modern alloy came into use about the 16th century.
The malleability of brass varies with its composition and temperature and with the presence of foreign metals, even in minute quantities. Some kinds of brass are malleable only when cold, others only when hot, and some are not malleable at any temperature. All brass becomes brittle if heated to a temperature near the melting point.
" text[2] = "Bronze
The term \"bronze\" broadly refers to copper alloys in which the major alloying element is neither zinc (which forms brass) nor nickel (which forms copper-nickel). Phosphor bronzes are best known for their elastic properties, and are often used for spring-loaded electrical contacts and switchgear.
" text[3] = "Copper
Copper was known to prehistoric people and was probably the first metal from which useful articles were made. Copper objects have been found among the remains of many ancient civilizations, including those of Egypt, Asia Minor, China, southeastern Europe, Cyprus (from which the word copper is derived), and Crete (Kríti). It was known to Native Americans, and American ores were found by the European explorers. It is also found in the pure state.
" text[4] = "Stainless Steel
Stainless Steel receives its stainless characteristics from an invisible, self-healing chromium oxide film that forms when chromium is added at concentrations greater than 10.5 percent. There are three major groups, the austenitic, the ferritic, and the martensitic. The best corrosion resistance is obtained in austenitic stainless steels.
" text[5] = "Lead
Lead was mentioned in the Old Testament. It was used by the Romans for making water pipes, soldered with an alloy of lead and tin.
Principal sources of lead are found in Australia, the United States, Canada, Mexico, Peru, Serbia (part of the republic of Serbia and Montenegro), and Russia. The United States consumes about half of the world production of lead, and it formerly produced about one-third of the world supply. Since World War II ended in 1945, the richest veins of galena have been exhausted, and U.S. output has been greatly reduced.
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