NDLI: Effects of surface chemistry on hot corrosion life (Document No: 19850018400)

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Effects of surface chemistry on hot corrosion life (Document No: 19850018400)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fryxell, R. E.
Copyright Year	1985
Description	Burner rig tests were conducted under the following conditions: 900 C, hourly thermal cycling, 0.5 ppm sodium as MaCl in the gas stream, velocity 0.3 Mach. The alloys are Udiment 700, Rene 80, uncoated and with RT21, Codep, or NiCoCrAlY coatings. These tests were completed for specimens in the as-processed condition and after aging at 1100 C in oxidizing or inert evnivronments for time up to 600 hours. Coil inductance changes used for periodic nondestructive inspection of specimens were useful in following the course of corrosion. Typical sulfidation was observed in all cases, structurally similar to that observed for service-run turbine components. Aging at cuased a severe decrease in hot corrosion life of RT21 and Codep coatings and a significant but less decrease in the life of the NiCoCrAlY coating. The extent of these decreases was much greater for all three coatings on U700 substrates than on Rene 80 substrates. Coating/substrate interdiffusion rather than by surface oxidation.
File Size	3159057
Page Count	49
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850018400
Archival Resource Key	ark:/13960/t3rv5f898
Language	English
Publisher Date	1985-06-01
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Heat Treatment Life Durability Alloys Gas Turbine Engines Thermal Cycling Tests Hot Corrosion Film Thickness Engine Parts Sulfation Metal Coatings Inductance Surface Reactions Oxidation Aging Metallurgy Protective Coatings Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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