Corrosion Failure by Pitting of Type 321 Stainless Steel Aircraft Freshwater Tanks Caused by Retained Metal-Cleaning Solution
Two freshwater tanks (0.81 mm (0.032 in) thick, type 321 stainless steel) were removed from aircraft service because of leakage due to pitting and rusting on the bottoms of the tanks. One tank had been in service for 321 h, the other for 10 h. There had been departures from the specified procedure for chemical cleaning of the tanks in preparation for potable water storage. The sodium hypochlorite sterilizing solution used was three times the prescribed strength, and the process exposed the bottom of the tanks to hypochlorite solution that had collected near the outlet. Investigation (visual inspection, 95x...
Corrosion Failure by Pitting of Type 321 Stainless Steel Aircraft Freshwater Tanks Caused by Retained Metal-Cleaning Solution, ASM Failure Analysis Case Histories: Air and Spacecraft, ASM International, 2019, https://doi.org/10.31399/asm.fach.aero.c0091318
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