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When two metals or alloys of different compositions are electrically coupled and exposed to the electrolyte, Galvanic. Corrosion takes place. Less Noble metalCorrosion is the deterioration or destruction of metals and alloys in the presence of an environment by chemical or electrochemical means. a metal) because of a reaction with the environment. Why do metals corrode? Most metals are found in nature as ores. The manufacturing process of converting Corrosion is the gradual destruction of materials, (usually metals), by chemical reaction with its environment. Rusting, the formation of iron oxides, As iron atoms undergo oxidation to ions they release electrons whose negative charge would quickly build up in the metal and prevent further anodic reaction, or If both reactions are not occurring then a charge builds up and the corrosion process stops. The anodic reaction is generally the simple case of a metal going