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Waste incineration corrosion processes: Oxidation mechanisms by electrochemical impedance spectroscopy
Author(s) -
Pérez F. J.,
Hierro M. P.,
Nieto J.
Publication year - 2008
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200804139
Subject(s) - incineration , dielectric spectroscopy , corrosion , molten salt , materials science , degradation (telecommunications) , electrochemistry , metallurgy , chloride , high temperature corrosion , chemical engineering , waste management , chemistry , electrode , engineering , telecommunications , computer science
Molten chloride mixtures are formed in waste incineration plants during waste firing and energy production. These mixtures are responsible for degradation processes like hot corrosion. In order to evaluate the damage of molten salt mixtures in waste incineration environments, the alloys 625 and 617 were exposed beneath a molten KCl‐ZnCl 2 mixture at 650 °C in air. The corrosion process was monitored by electrochemical impedance spectroscopy (EIS). An extensive microscopy analysis has been done in order to correlate the electrochemical results, and to establish an electrochemical mechanism for such high temperature corrosion processes.