Tubercles and Localized Corrosion on Carbon Steel
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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The chemistry, mineralogy and microbiology of tubercles on cast iron and carbon steel were investigated. Tubercles, from diverse fresh water environments and of varying ages, consistently had an outer crust of goethite and lepidocrocite and an inner shell of magnetite. Core regions differed in structure, composition and chemistry. The presence of tubercles on carbon steel and cast iron cannot be used to conclude localized corrosion directly under the tubercles or a role for bacteria in their formation.
- Properties of Metals and Alloys