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3 edition of Molten salt corrosion of SiC and Si₃N₄ found in the catalog.

Molten salt corrosion of SiC and Si₃N₄

Molten salt corrosion of SiC and Si₃N₄

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  • 28 Currently reading

Published by Lewis Research Center, NASA, National Technical Information Service, distributor in Cleveland, Ohio, [Springfield, Va .
Written in English

    Subjects:
  • Ceramics.,
  • Corrosion.,
  • Heat exchangers.,
  • Molten salts.,
  • Thermodynamics.

  • Edition Notes

    StatementNathan S. Jacobson, James L. Smialek, and Dennis S. Fox.
    SeriesNASA technical memorandum -- 101346.
    ContributionsSmialek, James L., Fox, Dennis S., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17683435M

    Oct 24,  · Metallography, analytical SEM, and XRD were used to measure kinetics and characterize the microstructure of hot corrosion of the Ni-Cr-Fe alloy INCONEL after h immersion in molten Na{sub 2}CO{sub 3}- NaCl salt at C in an oxidizing atmosphere. This was done to assess the alloy as a reaction vessel material for a waste treatment process known as Molten Salt Oxidation. The Author: D.W. Stevens, W.A. Brummond, D.L. Grimmett, J.C. Newcomb, K.T. Chiang. tainm ent materials for the molten salts are being experimentally screened. N aO H has a very high corrosion rate on ceramics and meta ls. Both.. carbonates and chlo­ rides can be contained at 9oo0c with relatively little cor­ rosion. 8 ased on the e asured corrosion rates, the economic potential of molten-salt thermal storage was.

    In this paper, study on corrosion of H, , L, P91 metal materials in modified solar two molten salts. The corrosion kinetics of , L, H, P91 metal material in the modified solar two molten salts at °C, °C is also investigated. Under the same condition it was found that , H corroded at a rate of 40% less than PAuthor: Wei Zhai, Bo Yang, Maodong Li, Shiping Li, Mingliang Xin, Shuanghong Zhang, Guojia Huang. molten salt electrolysis, it is not only determined with those factors, but also a decomposition potential. Molten salt or fused salt is used as an electrolyte, because it has an excellent electric conductivity, heat capacity, and can also act as a solvent. This work presents a comprehensive study on thermodynamic considerations of molten salt.

    The molten salt was prepared with analytical reagents: 50 mol% V 2 O mol% Na 2 SO 4 and the test temperature was °C. The amount of molten salt used for the three techniques in each experiment was mg/cm spa-hotel-provence.com salt corrosion where Na 2 SO 4-V 2 O 5 mixtures are present has been studied for several decades. Some authors [17, 18] performed experiments with different stainless Cited by: 3. Nov 25,  · Synthesis and characterization of new nitrate salt mixtures to molten salt storage Thomas Bauer, Alexander Bonk, Antje Wörner, •Interactions of molten salts with •metals / corrosion Solid or liquid salt sample Pt crucible SiC holding plate).


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Molten salt corrosion of SiC and Si₃N₄ Download PDF EPUB FB2

Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

research in ceramic corrosion deals with heat engines. This is because corrosion of metal alloys in engines had proven to be such a formidable problem.

2 Most of these studies center on Na2SO4 induced corrosion of SiC and Si3N4; only limited information on vanadate induced corrosion of SiC and Si3N 4. April 1st, Corrosion in Very High-Temperature Molten Salt for Next Generation CSP Systems Brenda Garcia Diaz (PI), Josh Gray (Co-PI), Luke Olson.

Molten salt corrosion of SiC and Si₃N₄ [microform] [] Jacobson, Nathan S. because the bonding components dissolved into molten carbonates salt. The corrosion rate is ± mm/year for bare stainless steel in molten eutectic NaCl – wt% LiCl at °C, which is the baseline used for determining how well the cement.

The overall corrosion reaction is described by salt deposition, rapid dissolution of the silica scale, and accelerated oxidation. SiC and Si 3 N 4 exhibit extensive pitting and/or grain boundary attack from corrosion, which leads to a strength reduction.

One approach to Cited by: 5. Given that corrosion will occur, techniques to implement redox control must be implemented and the salt chemistry must be monitored constantly.

Development of new alloys, possibly combined with surface treatments, with higher thermodynamic resistance to corrosion in molten salts, must be spa-hotel-provence.com by: The corrosion behavior of 4H-SiC in the FLiNaK molten salt ( °C), pre-irradiated with keV Si ions to dpa at °C, was investigated in order to clarify the effect of irradiation on spa-hotel-provence.com by: 7.

High Temperature Molten Salt Corrosion Testing • Identify molten salt/material combinations that have long service life and meet performance needs • Characterize corrosion rates, corrosion mechanisms, and methods to reduce corrosion • Long-term and electrochemical testing • Quartz or Inconel vessels with water cooled flanges.

Hot corrosion tests of alumina (Al2O3) and carbon silicate (SiC) ceramics exposed to KCl-NaCl molten salt were performed at high temperatures ( and °C) and for long times (h) in. Corrosion in Molten Salts. In book: Shreir's Corrosion, Publisher: Elsevier, pp at °C in N vol.% O2 and enhanced corrosion occurs in the presence of the molten salt.

The. Aug 08,  · Abstract. The corrosive effects of 60 % NaNO 3 /40 % NaNO 3 have been tested at and °C, in order to simulate the working conditions in two principal concentrated solar power (CSP) plants, on stainless steel (AISI) and on a low-Cr alloy steel (T22) containing % Cr.

The corrosion rates were determined by gravimetric tests, measuring the weight gain during 2, h Cited by: Molten salt is a salt that tends to be a solid (under standard temperature and pressure conditions) but becomes a liquid at elevated temperatures.

It has been widely used in industry for various applications such as power generation, material processing, heat transfer in industrial processes and many more.

Corrosion of Stainlessand Carbon Steels in Molten Mixtures of Industrial Nitrates" S.H. Goods, R. Bradshaw, M. Prairie, J. Chavez I. m i Preparedby Sandia NationalLaboratories Albuquerque,New Mexico andLivermore,California for the United States Department of Energy under Contract DE-ACAL i, i.

Molten salt oxidation is a non-flame, thermal process that destroys all organic materials while simultaneously retaining inorganic and hazardous components in the melt.

It is used as either hazardous waste treatment (with air) or energy harvesting similar to coal and wood gasification (with steam).

The corrosion in molten salts is well explained as the combination of anodic and cathodic reactions as similar with that in aqeous solutions. The cathodic reduction of the molten salts and the impurities such as water, oxygen and some other oxidants was discussed, which constituted the partial cathodic reaction of corrosion in molten spa-hotel-provence.com: Hiroo Numata, Atsushi Nishikata, Shiro Haruyama.

Molten Salt Corrosion, continued Fluoride salts are more aggressive than are chloride salts. Molten fluorides are used to flux metals and alloys for brazing operations. Along with fluxing the oxide film on the workpiece, fluorides also attack the chromium oxide film on heat resistant alloy fixturing.

A service trial of. System with Novel Molten Salt December 8, — April 30, Matthieu Jonemann Halotechnics, Inc. Emeryville, California NREL Technical Monitors: Harin Ullal and Craig Turchi Appearance of corrosion coupons after hours in Industrial grade Saltstream at.

HOT CORROSION ATTACK AND STRENGTH DEGRADATION OF SIC AND Si3N4 James L. Smialek, Dennis S. Fox, and Nathan S. Jacobson National Aeronautics and Space Administration Lewi s Research Center Cleveland, Ohio SUMMARY Thin films of. Corrosion behavior of SiC f /SiC composites, which were prepared via molten infiltration(MI), polymer impregnation and pyrolysis(PIP), and chemical vapor infiltration process(CVI), respectively, was studied by immersion in mol% LiFmol% NaF- mol% KF eutectic salt at ℃.

The evolution of phase composition and microstructure was. This fifth conference on Molten Salt Chemistry and Technology focused mainly on applied science and questions of technological concern, but also included aspects of fundamental research.

The organizers moreover were careful to organize four special sessions on less conventional issues, namely: molten carbonate fuel cells, hot corrosion, slags and glass forming melts and low temperature melts.

Hot chloride salts, and particularly salt fumes mixed with air, are very corrosive to heat resistant alloys. In general t he higher nickel alloys, such asare preferred, although we have seen tolerable results from the % silicon grade, RA MA. Corrosion in Molten Chloride Heat .CORROSION BEHAVIOUR OF CARBON MATERIALS IN MOLTEN LiCl-KCl Generally molten salt corrosion is caused by the dissolution of the constituents of the material, selective leaching/attack, pitting, uniform surface corrosion and chemical reactions [26].

Any one or more of the above corrosion processes can take place depending on.The LM-LS experiment: investigating corrosion control, in Liquid Fluoride Salts, by Liquid alkali Metal Commission abandoned the promising Molten Salt Breeder Reactor (MSBR) project at Oak because the products of salt corrosion (metallic fluorides), are less stable than.