TY - JOUR
T1 - A study on the effect of Co, Cr and Ti on the corrosion of FE40AL intermetallic in molten NaCl-KCl mixture
AU - Romo, L.
AU - Gonzalez-Rodriguez, J. G.
AU - Porcayo-Calderon, J.
AU - Guardian, R.
AU - Salinas-Bravo, V. M.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/12/5
Y1 - 2015/12/5
N2 - The effect of the addition of 3 at% Cr, Co or Ti on the corrosion behavior of Fe40Al intermetallic alloy in 1 M NaCl:1 M KCl mixture at 750 °C has been carried out by using electrochemical techniques. Techniques included potentiodynamic polarization curves, linear polarization resistance and electrochemical impedance spectroscopy measurements. It has been found that the addition of either Cr, Co or Ti decreased the corrosion rate of Fe40Al intermetallic by almost five times due to the formation of a passive layer, absent in the base alloy. This was because the diffusion of Al towards the top of the alloy for the establishment of a protective Al2O3 layer was enhanced by the presence of these alloying elements. The corrosion rate for the base alloy was under diffusion control of the reactants, whereas that for alloyed intermetallic was under charge transfer control.
AB - The effect of the addition of 3 at% Cr, Co or Ti on the corrosion behavior of Fe40Al intermetallic alloy in 1 M NaCl:1 M KCl mixture at 750 °C has been carried out by using electrochemical techniques. Techniques included potentiodynamic polarization curves, linear polarization resistance and electrochemical impedance spectroscopy measurements. It has been found that the addition of either Cr, Co or Ti decreased the corrosion rate of Fe40Al intermetallic by almost five times due to the formation of a passive layer, absent in the base alloy. This was because the diffusion of Al towards the top of the alloy for the establishment of a protective Al2O3 layer was enhanced by the presence of these alloying elements. The corrosion rate for the base alloy was under diffusion control of the reactants, whereas that for alloyed intermetallic was under charge transfer control.
KW - Electrochemical impedance
KW - Fe40 Al
KW - Molten salt corrosion
UR - http://www.scopus.com/inward/record.url?scp=84940947137&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2015.08.002
DO - 10.1016/j.intermet.2015.08.002
M3 - Artículo
AN - SCOPUS:84940947137
SN - 0966-9795
VL - 67
SP - 156
EP - 165
JO - Intermetallics
JF - Intermetallics
ER -