Corrosion resistance of a number of structural materials in a NaOH melt

Yurkinskii, V. P.; Firsova, E. G.; Baturova, L. P.

doi:10.1134/s1070427210100150

Cited by 5 publications

(5 citation statements)

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“…The corrosion rate of alloy steels in molten NaOH significantly decreases in the temperature range 773–873 K. The protective properties of the oxide coating formed on the steel surface increase probably as a result of enriching it with NiO, Cr 3 O 4 , Cr 2 O 5 , CrO compounds. The aforementioned oxides form a layer of high density, evenly adhering to the surface and showing high resistance to chemical corrosion [ 15 ]. Based on literature reports [ 25 ] on the increased corrosion resistance of titanium doped steels, an alloy steel containing about 0.7% titanium (AISI 316Ti) was also used to build the cell cathode.…”

Section: Methodsmentioning

confidence: 99%

Materials Selection and Construction Development for Ensuring the Availability and Durability of the Molten Hydroxide Electrolyte Direct Carbon Fuel Cell (MH-MCFC)

Kacprzak

Włodarczyk

2020

Materials

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The molten hydroxide electrolyte Direct Carbon Fuel Cell (MH-DCFC) is a promising type of DCFC due to its advantages, such as high ionic conductivity, higher electrochemical activity of carbon (higher anodic oxidation rate and lower overpotentials) and high efficiency of carbon oxidation due to lower operating temperature (the dominant product of carbon oxidation is CO2 vs. CO). Accordingly, the MH-DCFC can be operated at lower temperatures (roughly 673–873 K), and thus cheaper materials can be used to manufacture the cell. Nonetheless, MH-DCFCs are still under development due to several fundamental and technological challenges such as corrosion problems. Selection of materials and development of a structure that ensures adequate availability and durability of the cell is crucial for the optimization of the MH-DCFC performance and the further development of that technology. This article presents the operating characteristics of the MH-DCFC made of different construction materials, such as carbon steel, stainless steel, and nickel and its alloys. Nickel and its alloys have proven to be the best materials for the construction of individual elements of the fuel cell. Inconel alloy 600 was a good catalytic material for cathodes with good corrosion resistance.

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Section: Methodsmentioning

confidence: 99%

Materials Selection and Construction Development for Ensuring the Availability and Durability of the Molten Hydroxide Electrolyte Direct Carbon Fuel Cell (MH-MCFC)

Kacprzak

Włodarczyk

2020

Materials

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“…Fused sodium hydroxide is of interest as moderator in MSRs because it possesses the ability to slow down neutrons, offers stability towards irradiation [ 1 ], and is considered cost-effective being abundantly available. However, molten sodium hydroxide is generally severely corrosive at high temperatures [ [2] , [3] , [4] ].…”

Section: Introductionmentioning

confidence: 99%

“…Previous efforts selecting structural materials that will not undergo extensive degradation in contact with sodium hydroxide at high temperatures have been reported in literature. Generally, nickel-based alloys are reported as having the highest resistance to corrosion in fused NaOH in static conditions [ [3] , [4] , [5] ].…”

Section: Introductionmentioning

confidence: 99%

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High temperature corrosion and oxide scale formation of nickel in molten NaOH at various basicity levels

Stoffersen,

Cooper,

Jellesen

et al. 2024

Heliyon

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“…More frequently, voltammetric measurements in molten NaOH are carried out with iron or steel working electrodes (Kolchakov et al, 2005;Yurinskii et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of NaOH–Na2O–Na2O2–H2O–NaH melt by EMF measurements and cyclic voltammetry

et al. 2015

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Thermodynamic activity of sodium oxide and oxidation potential in NaOH-Na2O-Na2O2-H2O-NaH melt at the temperature of 400 • C was investigated. Galvanic cell for the potentiometric measurements consisted either of a sodium electrode formed by β and β -alumina semi-closed tube filled with liquid sodium or a platinum wire and of an oxygen electrode made from ZrO2 (Y2O3) solid electrolyte with the Bi-Bi2O3 reference mixture. The number of exchanged electrons determined from the electromotive force measurements was in good agreement with the assumed reactions. The activity coefficient of sodium oxide was lower than one. Voltammetric measurements were carried out with a sodium reference electrode and a nickel auxiliary electrode. Behaviour of platinum, gold, silver and nickel as working electrodes was studied. The experiments were carried out in nitrogen atmosphere. Several types of zirconia semi-closed tubes were tested for long-term measurements under the process conditions.

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Corrosion resistance of a number of structural materials in a NaOH melt

Cited by 5 publications

References 1 publication

Materials Selection and Construction Development for Ensuring the Availability and Durability of the Molten Hydroxide Electrolyte Direct Carbon Fuel Cell (MH-MCFC)

Materials Selection and Construction Development for Ensuring the Availability and Durability of the Molten Hydroxide Electrolyte Direct Carbon Fuel Cell (MH-MCFC)

High temperature corrosion and oxide scale formation of nickel in molten NaOH at various basicity levels

Electrochemical investigation of NaOH–Na2O–Na2O2–H2O–NaH melt by EMF measurements and cyclic voltammetry

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