INFLUENCE OF PRIMARY WATER CHEMISTRY ON OXIDES FORMED ON ALLOY 600 AND ALLOY 690

摘要

The results of in situ SERS investigations of Alloys' 600 and 690 surface films were combined with the results of a number of ex situ studies conducted by other researchers who used a variety of experimental techniques. Comparing the results of different investigations revealed the surface films' composition and microstructure were most sensitive to alloy composition and the concentrations of aqueous metal cations (especially Fe~+ ). Earlier studies established that the films typically consist of two layers and that saturation concentrations of (Ni~(++)_(aq) and (Fe~(+Z))_(aq) affect the composition and crystal structure of the films' outer layers. The current investigation indicates that aqueous Ni~(++) and Fe~(+2) also affect the composition and structure of the surface films' inner layers.