D. Piel, A. Martin, E. Drouelle, J. Cormier, F. Pedraza
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引用次数: 0
Abstract
This paper highlights that hot corrosion at 750 °C can develop on the surface of AM1 nickel-based single-crystal superalloy (SX) turbine blades, whether in the As-Cast (AC) or Fully Heat-Treated (FHT) states even in the absence of SO3 (g) flow. It was found that the 1 and 3 mg/cm2 Na2SO4 deposits induce sulphidation, oxidation and basic flux at such low temperature like in Type I hot corrosion. Sulphidation is mainly located in the γˈ-depleted zone irrespective the substrate (AC and FHT). The metallurgical segregations in the AC superalloy extend the incubation period in contrast to what is observed upon pure oxidation. The increase in salt content showed a reduction in hot corrosive attack by forming a barrier layer.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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