Commercial nickel-containing material have been exposed to simulated waste incineration conditions, comprising simulated flue gas and applied salt coatings, at 550° and 650°C using an inlet gas mixture comprised of N2-10%O2-10%CO2-20%H2O-1500ppm HCl-300ppm SO2. Samples were tested at 550° and 650°C after application of salt mixtures to the sample surface. The first salt mixture contained 20% ZnCl2, 40.9% PbCl2, 21.9% KCl, and 17.2% NaCl by weight while the second mixture contained 4.7% ZnCl2, 9.7% PbCl2, 2% KCl, 2.6% NaCl, 6.1% K2SO4, 4.9% Na2SO4 and 70% Al2O3 by weight. Testing at 650° was conducted with and without application of the first salt mixture to the surface. Testing at 550°C was conducted with application of each salt mixture, respectively. Corrosion performance has been evaluated metallographically and related to alloy composition using multiple regression analysis. Both wrought as well as weld overlays were compared in this study of simulated WTE/Inceneration environments.
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