Detailed Assessment of the High-Temperature Corrosion Behavior of Turbine Engine Components to Establish Effective Laboratory-Scale Testing Protocols
Abstract
The hot-section components of aero and marine engines must often endure harsh environments that tend to limit service life and perfo"rmance. In particular, a form of deposit-induced attack termed hot corrosion is a growing issue due to advances that increase the op"erating temperatures of engines. Recent research led by Gleeson (the PI in this proposal) has shown that the severity of the hot cor"rosion can be linked to the SO2/SO3 content in the atmosphere and the chemistry of the deposit. For instance, deposits found in degr""aded engines have been shown to contain Na, Ca, K, Mg, S, and O; however, the role of complex deposit chemistry on hot corrosion is" poorly understood. This proposed project will have the following two main tasks.Task 1 Assessment of Corroded Turbine Components f"rom both Marine and Air Service The Navy, GE and Pratt & Whitney ~ collaborating participants in this proposed effort ~ will provide" the University of Pittsburgh (U Pitt) corroded components ~ or at least sections ofcomponents ~ pulled from service. The deposits and associated degradation of these components will be fully assessed. Detailed assessments of corroded sections will allow for determination of: a) deposit chemistries (particularly the soluble constituents; b) corrosion-product chemistries; and c) mode and exte"nt of corrosive attack. Where possible, correlations of these items will bemade with geographic history of component exposures.Tas"k 2 Establish Testing Protocols that Duplicate Corrosion Behavior Found in Service Laboratory-scale hot-corrosion testing to simulate the mode(s) of corrosion found with the parts pulled from service will be established. The deposit chemistries will be guided by t"he analyses results from Task 1, together with prior assessments conducted at U Pitt. Tests will be conducted in air and air+trace S""O2 (e.g., ~10 ppm) in order to gauge the importance of environmental SO2 in affecting the extent and mode of corrosive attack.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 29, 2017
- Source ID
- N000141712916
Entities
People
- Brian T Gleeson
Organizations
- Office of Naval Research
- United States Navy
- University of Pittsburgh