Literature review of inhibition for vanadate attack

Technical Report · Wed Jun 01 04:00:00 EDT 1988

OSTI ID:6629368

Bornstein, N S

There are economic advantages associated with burning lower-cost residual and certain crude oils, but the corrosive deposits rich in alkali and vanadium promote hot corrosion and negate the savings in fuel costs. It appears possible to attenuate vanadium hot corrosion provided that it is recognized that the problem consists of two related corrosion phenomena. They are the accelerated oxidation of alumina-forming materials by the glass-forming vanadium pentoxide and the accelerated oxidation of these materials by fused alkali vanadates. It is recommended that a research program be initiated aimed at obtaining: 1) a better understanding of the process by which the vanadium in the fuel is transferred to the surface of turbine components in order to assess the feasibility of preventing vanadic deposition, 2) kinetic data and an understanding of the chemistry involved in the formation of the glasses that form on the surface of the advanced alloys and coatings when they are covered with a film of V/sub 2/O/sub 5/ in order to cause devitrification through alloy modification or a fuel additive and 3) kinetic and thermochemical data for the accelerated oxidation of alkali vanadate-coated gas-turbine materials to identify the rate-controlling process or weakest link so that appropriate changes can be made to the alloy or coating through a fuel additive to attenuate the corrosion.

• Research Organization: United Technologies Research Center, East Hartford, CT (USA)
• OSTI ID: 6629368
• Report Number(s): AD-A-198325/3/XAB; UTRC/R-88-917873
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
ADDITIVES
CHALCOGENIDES
CHEMICAL REACTIONS
COATINGS
COMBUSTION
CORROSION INHIBITORS
CORROSIVE EFFECTS
DEPOSITION
ELEMENTS
ENGINES
FUEL ADDITIVES
FUELS
GAS TURBINE ENGINES
GAS TURBINES
GLASS
HEAT ENGINES
HIGH TEMPERATURE
INTERNAL COMBUSTION ENGINES
KINETICS
MACHINERY
MATERIALS
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TURBINES
TURBOMACHINERY
VANADATES
VANADIUM
VANADIUM COMPOUNDS