Corrosion behavior of IN-800 superalloy in waste-incineration environments: Hot corrosion by molten chlorides

The corrosion resistance of the IN-800 superalloy in contact with a molten mixture of (52-48) mol.% PbCl2-KCl, similar to that found in,waste-incinera tion plants, has been studied. The corrosion kinetics have been analyzed us ing continous-current electrochemical techniques and electrochemical-impeda nce spectroscopy (EIS). Studies were performed to determine the influence o f temperature and of the presence of carbon in the salt on the corrosion ra te. Scanning electron microscopy (SEM) and electron probe microanalysis (EP MA) rr ere used as additional techniques to analyze the corrosion products in order to elucidate the corrosion mechanism.