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Several type 304 stainless steel fire truck water tanks developed through-wall leaks after being in service for approximately two years. One representative tank underwent a comprehensive laboratory analysis, which included metallographic examinations and chemical analyses. The examinations revealed a classic case of microbiologically influenced corrosion (MIC), which preferentially attacked the heat affected zones of the tank welds, resulting in the leaks.

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T.N. Ackerson, Metallographic Examination of Microbiologically Influenced Corrosion in a Fire Truck Water Tank, ASM Failure Analysis Case Histories: Automobiles and Trucks, ASM International, 2019,

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