Heat Pipe and Thermal Energy Storage and Corrosion Studies (1988)
Abstract
Corrosion degradation analysis was performed on a set of three Inconel 617 Thermal Energy Storage capsules filled with different eutectic fluoride mixtures of LiF, MgF2, NaF and KF which were thermally cycled near 1000 K for 10,000 hours. These capsules were cut out and various sections were metallographically studied by Optical and Scanning Electron microscopy and by elemental X-ray mapping. Chemical analyses on the metallic container were performed using the Electron Probe Micro-analyser and that of the salts by Atomic Absorption Spectroscopy. It was determined that the container material did not suffer significant microstructural damage except for tiny pits near the edge in contact with the salts and some voids near the surface exposed to vacuum which could not be positively identified as due to corrosion. The region extending to about 50 microns form the inner edge is contact with salt and about 30 microns from the outer edge exposed to vacuum were found to be depleted mainly of Aluminum and to a lesser extent Chromium. Thermal energy storage, Eutectic fluoride, Corrosion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA212655
Entities
People
- Dean Jacobson
- Mohan Krishnamurthy
- Patrick Dalton
Organizations
- Texas A&M University