Effects of Chromium, Molybdenum, and Tungsten on Sodium Sulfate-induced High Temperature Corrosion of Nickel

摘要: Abstract Operating gas turbine engines are susceptible to a phenomenon called hot corrosion. Hot corrosion is generally attributed the interaction of nickel-base blade alloys with ingested sodium sulfate. Two mechanisms were presented previously account for surface and grain boundary nickel metal. This paper reports effect chromium, molybdenum, or tungsten, their products on The considered oxides sodium-oxygen compounds. molybdenum tungsten enhance sulfate-induced same degree as metals themselves while those chromium do not. enhanced caused by molybdate tungstate suggests that more than simple acid-base involved. formation friable, porous film presence proposed mechanism responsible this enhancement. mechani...