Screen Bars Destroyed by Intergranular Corrosion
Fragments of screen bars which as structural elements of a condenser had come into contact with cooling water from the mouth of a river were received. The screen bars were made of stainless austenitic Cr-Ni-Mo steel X 5 Cr-Ni-Mo18 10 (Material No. 1.4401). The bars were fractured repeatedly. The ruptures did not occur exclusively or even preferentially at the loops, but just as frequently at locations between them. The mistake made in this case was annealing the steel at a temperature in the critical region. This was probably done to relieve stresses that originated during cold-forming and led to...
Friedrich Karl Naumann, Ferdinand Spies, Screen Bars Destroyed by Intergranular Corrosion, ASM Failure Analysis Case Histories: Chemical Processing Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.chem.c9001213
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