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