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Use of electrochemical techniques to study the corrosion of metals in model fluoride melts

Fabre, Stéphanie and Cabet, Céline and Cassayre, Laurent and Chamelot, Pierre and Delepech, Sylvie and Finne, Jorgen and Massot, Laurent and Noël, Didier Use of electrochemical techniques to study the corrosion of metals in model fluoride melts. (2013) Journal of Nuclear Materials, vol. 441 (n° 1-3). pp. 583-591. ISSN 0022-3115

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Official URL: http://dx.doi.org/10.1016/j.jnucmat.2013.03.055

Abstract

Molten fluorides are appealing coolants for innovative nuclear systems but structural alloys may undergo corrosion at high temperature. Because corrosion primarily occurs via electrochemical reactions, electrochemical techniques are ideal for the study of corrosion thermochemistry and kinetics. Examples are given. An electrochemical series was established using voltammetry in LiF-NaF at 1173 K. Stability increases in the following order: Na, Cr, Fe, Ni, Mo/W, Ag, Au. Various alloys were also classified according to their oxidation resistance. A cathodic protection method was developed to curb the intergranular attack of some nickel alloys in molten LiF-CaF₂-MgF₂-ZrF₄ containing tellurium vapor at 953 K. Voltammetry and polarization resistance measurement were used to estimate the rate of chromium selective dissolution for nickel base alloys immersed in LiF-NaF at 1073 K and 1173 K.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF can be found at Journal of Nuclear Materials website: http://www.sciencedirect.com/science/article/pii/S0022311513005588
HAL Id:hal-00877440
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > EDF (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Vincent GERBAUD
Deposited On:28 Oct 2013 14:12

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