Stress-corrosion cracking case histories

A program for acoustic emission under the name Monopac was developed for external and internal corrosion, stress corrosion cracking and weld cracking.55 This program consists of the test procedures as well as case histories. 

Copson, H. R. and Cheng, C. F., Some Case Histories of Stress Corrosion Cracking of Austenitic Stainless Steels Associated with Chlorides, Corrosion, June 1957, p. 55. 

Nevertheless, some case histories have been reported, especially for piping systems and heat exchangers. In the latter, biofilms are known to cause heat transfer problems. Remarkably, corrosion rates increase, when cells inside the biofilms die, possibly due to the production of ammonia and carbon dioxide, which may result in pitting and stress corrosion cracking of copper and its alloys. 

Case histories of MIC on copper and its alloys have been reported for piping systems and heat exchangers. Whereas heat transfer problems are observed with growing biofilms, the corrosion increases after the death of the microorganisms within the biofilm. This is believed to be due to the production of ammonia and carbon dioxide upon the death of cells that may result in pitting corrosion and/or stress corrosion cracking for copper and its alloys [72,92]. 

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