Abstract
Oxygen separation membranes for clean coal energy delivery in advanced coal based power plants rely on use of solid state mixed ionic/electronic conductors which operate at temperatures in the range 700-900 not equal to . Nicrofer- 6025HT is a nickel based alloy which shows compatibility with these systems. Nicrofer has been proposed as a manifold material to transport the hot gases into these oxygen separation membranes. The present work investigates the kinetics of oxide scale formation on Nicrofer. Electron dispersive spectroscopy, wavelength dispersive spectroscopy and X-Ray photoelectron spectroscopy were used to characterize the oxide scale. It was observed that the oxide scale consisted primarily of two layers, an outer scale of chromium oxide and an alumina scale beneath it.