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Electrochemical study of Ni20Cr coatings applied by HVOF process in ZnCl2-KCl at high temperatures
Jorge A. Ascencio
Maura Casales Díaz
Lorenzo Martinez Gomez
victor salinas
Oscar Sotelo Mazon
Jesús Porcayo Calderón
Acceso Abierto
Corrosion behavior of Ni20Cr coatings deposited by HVOF (high velocity oxygen-fuel) process was evaluated in ZnCl2-KCl (1:1 mole ratio) molten salts. Electrochemical techniques employed were potentiodynamic polarization curves, open circuit potential, and linear polarization resistance (LPR) measurements. Experimental conditions included static air and temperatures of 350, 400, and 450°C. 304-type SS was evaluated in the same conditions as the Ni20Cr coatings and it was used as a reference material to assess the coatings corrosion resistance.
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