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Title: Loop for the observation of film temperature effects on decomposition (LOFTED)

Molten nitrate salt Loop for the Observation of Film Temperature Effects on Decomposition (LOFTED) was designed, fabricated, and tested. This unique experimental arrangement allowed a 60/40 molten nitrate salt to be continuously pumped through a Haynes 230 pipe, allowing simulation of a solar receiver. The wall temperature was held at 670°C during the test and the bulk temperature range from 600-610°C for approximately 1200 hours. Salt decomposition was tested using a calibrated total alkalinity methodology to assess oxide content over time. Several alloys (347SS, HR-224, In625-SQ, Haynes 230) were tested for corrosion performance over the duration of the study and compared to previous static tests. Results yielded nearly a tenfold increase in corrosion rate as compared to 600°C, owing to the need to understand the effects of flow and mass transport on corrosion in molten salt environments.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Materials Chemistry
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Concentrating Solar Technologies Dept.
Publication Date:
OSTI Identifier:
1323356
Report Number(s):
SAND2014--18103
537653
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Research Org:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Program (EE-2A)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 14 SOLAR ENERGY