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Evaluating The Corrosion Performance Of Materials In Solar Nitrate Salts

Product Number: 51321-16570-SG
Author: Keenan O’Neill/ John Groth/ Helena Alves/ Dev Chidambaram
Publication Date: 2021
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The corrosion behavior of two alloy samples was analyzed using potentiodynamic polarization in a molten nitrate medium at 500℃. The Tafel region of the polarization curves was extrapolated to calculate the exchange current density and corrosion potential. Gravimetric analysis was also conducted to determine the mass change due to corrosion. The performance of these alloys was approximated using these values to screen these materials for further testing in this environment. The exchange current density was lowest for UNS N06230 at 0.233mA/cm2 and highest for UNS N06625 GR1 at 0.389mA/cm2 .

Key words: Molten solar salts, NaNO3, KNO3, Potentiodynamic, Nickel alloys, VDM, Alloy 625

The corrosion behavior of two alloy samples was analyzed using potentiodynamic polarization in a molten nitrate medium at 500℃. The Tafel region of the polarization curves was extrapolated to calculate the exchange current density and corrosion potential. Gravimetric analysis was also conducted to determine the mass change due to corrosion. The performance of these alloys was approximated using these values to screen these materials for further testing in this environment. The exchange current density was lowest for UNS N06230 at 0.233mA/cm2 and highest for UNS N06625 GR1 at 0.389mA/cm2 .

Key words: Molten solar salts, NaNO3, KNO3, Potentiodynamic, Nickel alloys, VDM, Alloy 625

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