NDLI: Effects of surface chemistry on hot corrosion life (Document No: 19840016706)

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Effects of surface chemistry on hot corrosion life (Document No: 19840016706)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fryxell, R. E.
Copyright Year	1984
Description	Baseline burner rig hot corrosion with Udimet 700, Rene' 80; uncoated and with RT21, Codep, or NiCoCrAlY coatings were tested. Test conditions are: 900C, hourly thermal cycling, 0.5 ppm sodium as NaCl in the gas stream, velocity 0.3 Mach. The uncoated alloys exhibited substantial typical sulfidation in the range of 140 to 170 hours. The aluminide coatings show initial visual evidence of hot corrosion at about 400 hours, however, there is no such visual evidence for the NiCoCrAlY coatings. The turbine components show sulfidation. The extent of this distress appeared to be inversely related to the average length of mission which may, reflect greater percentage of operating time near ground level or greater percentage of operation time at takeoff conditions (higher temperatures). In some cases, however, the location of maximum distress did not exhibit the structural features of hot corrosion.
File Size	2720372
Page Count	61
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840016706
Archival Resource Key	ark:/13960/t49p7wd1v
Language	English
Publisher Date	1984-06-01
Access Restriction	Open
Subject Keyword	Metallic Materials Degradation Chemistry Deterioration Life Durability Aluminates Surface Properties Mechanical Properties Long Term Effects Hot Corrosion 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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