Investigation of vanadium and hot corrosion resistance of chromium- and silicon-base coating systems. Annual R and D report, 21 September 1981-20 September 1982

Technical Report · Fri Oct 01 04:00:00 EDT 1982

OSTI ID:6879802

Barkalow, R H

The objective of this program is the identification of advanced overlay coating compositions capable of resisting both the hot corrosion and ash erosion effects due to vanadium, sulfur, and alkali metals in low-grade oils as well as the oxidation/interdiffusion degradation expected to result from cleaner but hotter burning coal-derived liquids. Toward this objective, a program of furnace and burner rig testing was devised to investigate the behavior of the following types of alloys in Na/sub 2/SO/sub 4/, V/sub 2/O/sub 5/, and mixed salt hot corrosion: Ni-Cr-Si alloys of varying Cr and Si content; quaternary and active element additions to Ni-Cr-Si; Cr-base alloys; and Si-34Cr-23Ta. The tests were designed to provide fundamental information about the degradation mechanism and relative resistance versus the major hot corrosion variables (alloy composition, temperature, type and amount of salt, sulfur trioxide in the gaseous environment), with the ultimate goal of identifying systems and compositions suitable for further alloy and process development.

• Research Organization: Pratt and Whitney Aircraft Group, West Palm Beach, FL (USA). Government Products Div.
• DOE Contract Number: AC06-79ET15322
• OSTI ID: 6879802
• Report Number(s): DOE/ET/15322-T5; FR-16634; ON: DE83003280
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
CORROSIVE EFFECTS
OXIDES
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
SODIUM OXIDES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES