Impact of Corrosion Test Container Material in Molten FluoridesSource: Journal of Solar Energy Engineering:;2015:;volume( 137 ):;issue: 006::page 61007Author:Olson, Luke C.
,
Fuentes, Roderick E.
,
Martinez
,
Ambrosek, James W.
,
Sridharan, Kumar
,
Anderson, Mark H.
,
Garcia
,
Gray, Joshua
,
Allen, Todd R.
DOI: 10.1115/1.4031682Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of crucible material choice on alloy corrosion rates in immersion tests in molten LiF–NaF–KF (46.5–11.542 mol. %) salt held at 850 آ°C for 500 hrs are described. Four crucible materials were studied. Molten salt exposures of Incoloy800H in graphite, Ni, Incoloy800H, and pyrolytic boron nitride (PyBN) crucibles all led to weightloss in the Incoloy800H coupons. Alloy weight loss was ∼30 times higher in the graphite and Ni crucibles in comparison to the Incoloy800H and PyBN crucibles. It is hypothesized galvanic coupling between the alloy coupons and crucible materials contributed to the higher corrosion rates. Alloy salt immersion in graphite and Ni crucibles had similar weightloss hypothesized to occur due to the rate limiting out diffusion of Cr in the alloys to the surface where it reacts with and dissolves into the molten salt, followed by the reduction of Cr from solution at the molten salt and graphite/Ni interfaces. Both the graphite and the Ni crucibles provided sinks for the Cr, in the formation of a Ni–Cr alloy in the case of the Ni crucible, and Cr carbide in the case of the graphite crucible.
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contributor author | Olson, Luke C. | |
contributor author | Fuentes, Roderick E. | |
contributor author | Martinez | |
contributor author | Ambrosek, James W. | |
contributor author | Sridharan, Kumar | |
contributor author | Anderson, Mark H. | |
contributor author | Garcia | |
contributor author | Gray, Joshua | |
contributor author | Allen, Todd R. | |
date accessioned | 2017-05-09T01:23:40Z | |
date available | 2017-05-09T01:23:40Z | |
date issued | 2015 | |
identifier issn | 0199-6231 | |
identifier other | sol_137_06_061007.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/159665 | |
description abstract | The effects of crucible material choice on alloy corrosion rates in immersion tests in molten LiF–NaF–KF (46.5–11.542 mol. %) salt held at 850 آ°C for 500 hrs are described. Four crucible materials were studied. Molten salt exposures of Incoloy800H in graphite, Ni, Incoloy800H, and pyrolytic boron nitride (PyBN) crucibles all led to weightloss in the Incoloy800H coupons. Alloy weight loss was ∼30 times higher in the graphite and Ni crucibles in comparison to the Incoloy800H and PyBN crucibles. It is hypothesized galvanic coupling between the alloy coupons and crucible materials contributed to the higher corrosion rates. Alloy salt immersion in graphite and Ni crucibles had similar weightloss hypothesized to occur due to the rate limiting out diffusion of Cr in the alloys to the surface where it reacts with and dissolves into the molten salt, followed by the reduction of Cr from solution at the molten salt and graphite/Ni interfaces. Both the graphite and the Ni crucibles provided sinks for the Cr, in the formation of a Ni–Cr alloy in the case of the Ni crucible, and Cr carbide in the case of the graphite crucible. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Impact of Corrosion Test Container Material in Molten Fluorides | |
type | Journal Paper | |
journal volume | 137 | |
journal issue | 6 | |
journal title | Journal of Solar Energy Engineering | |
identifier doi | 10.1115/1.4031682 | |
journal fristpage | 61007 | |
journal lastpage | 61007 | |
identifier eissn | 1528-8986 | |
tree | Journal of Solar Energy Engineering:;2015:;volume( 137 ):;issue: 006 | |
contenttype | Fulltext |