In 1937 Emilio Segre and Carlo Perrier created technetium by bombarding molybdenum targets with particles consisting of a proton and a neutron called deuterons. Since its creation, searches for the element in earthly material have been made. In 1962, technetium-99 was isolated and identified in an uranium rich ore found in Africa. In 1988, minute quantities of it were detected in a deep Colorado molybdenum mine.
Technetium is used in the steel industry because it is a remarkable corrosion inhibitor.
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