Abstract :
This paper presents an experimental and theoretical investigation of the causes of corrosion of stack in a
cement plant. In this paper, information related to metallic stack failures are given in the form of a case study in Neka
Cement Plant, Mazandaran, Iran. Heavy corrosion attacks were observed on the samples of stack. The failure can be
caused by one or more modes such as overheating, stress corrosion cracking (SCC), hydrogen embrittlement, creep,
flame impingement, sulfide attack, weld attack, dew point corrosion, etc. Theoretical calculations and experimental
observations revealed that, the corrosion had taken place due to the condensation of acidic flue gases in the interior
of stack. Also, the chemical analysis of the corrosion deposits and condensates confirmed the presence of highly acidic
environment consisting of mostly sulfate ions.
