Handbook of Case Histories in Failure Analysis
Caustic Gouging and Caustic-Induced Stress-Corrosion Cracking of Superheater Tube U-Bends
-
Published:1993
Abstract
Original carbon steel and subsequent replacement austenitic stainless steel superheater tube U-bend failures occurred in a waste heat boiler. The carbon steel tubes had experienced metal wastage in the form of caustic corrosion gouging, while the stainless steel tubes failed by caustic-induced stress-corrosion cracking. Sodium was detected by EDS in the internal deposits and the base of a gouge in a carbon steel tube and in the internal deposits of the stainless steel tube. The sodium probably formed sodium hydroxide with carryover moisture and caused the gouging, which was further aggravated by the presence of silicon and sulfur (silicates...
Sign in
ASM members
Member Sign InAllen W. Hearn, Harold Rawlinson, G. Mark Tanner, Caustic Gouging and Caustic-Induced Stress-Corrosion Cracking of Superheater Tube U-Bends, Handbook of Case Histories in Failure Analysis, Vol 2, Edited By Khlefa A. Esaklul, ASM International, 1993, p 148–152, https://doi.org/10.31399/asm.fach.v02.c9001323
Download citation file:
Join Failure Analysis Society
The ASM Failure Analysis Society (FAS) is a community where failure analysis professionals from all over the world can learn and grow in their field.