Corrosión en sales fundidas de un acero recubierto mediante rociado térmico por llama
DOI:
https://doi.org/10.15665/rp.v12i1.146Keywords:
Corrosión, Sales fundidas, Óxidos, Rociado térmico, Recubrimientos.Abstract
Se evaluó la velocidad de corrosión de un acero laminado en caliente, recubierto con una aleación Ni-Cr, en
presencia de sales fundidas con una composición de 80% pentóxido de vanadio (V2O5) y 20% Sulfato de sodio
(Na2SO4), mediante la técnica de pérdida de peso. La evaluación de la velocidad de corrosión se realizó variando
la temperatura entre 650-750 °C, durante 1, 7 y 22 horas. El recubrimiento de Ni-Cr obtenido por la técnica de
rociado térmico produce una capa que reduce la velocidad de corrosión, sin embargo es susceptible al ataque corrosivo
de las sales fundidas a las que se encuentra expuesto dicho recubrimiento. Encontramos que la resistencia
a la corrosión del recubrimiento depende de la naturaleza de la capa de óxido, los componentes de la aleación y
los constituyentes de las sales.
References
Chatha, S., Sidhu, H. & Sidhu, B. (2012). High temperature
hot corrosion behaviour of NiCr and Cr3C2–NiCr
coatings on T91 boiler steel in an aggressive environment
at 750 °C. Surface & Coatings Technology 206 (19-20), 3839-
, 2012.
Bradshaw, A., Simms, N. & Nicholls, J. (2013). Hot corrosion
tests on corrosion resistant coatings developed for
gas turbines burning biomass and waste derived fuel gases.
Surface & Coatings Technology 228, 248-257, 2012.
Bala, N., Singh, H. & Prakash, S. (2010). Accelerated hot
corrosion studies of cold spray Ni–50Cr coating on boiler
steels. Materials and Design 31 (1), 244-253, 2010.
Trevisan, R. & Lima, C. (2002). Aspersao Termica Fundamentos
E Aplicacoes. Sao Paulo: Editorial Artliber.
Kalacska, G., Fazekas, L., Keresztes, R., Toth, A. & Szepvolgyi,
J. (2011). Cold flame-sprayed and oil-impregnated
porous metallic coatings. Applied Surface Science 257
(22), 9532-9538.
[7] Davis. J. (2004). Handbook of Thermal Spray Technology.
Ohio: Thermal Spray Society and ASM. International.
Marulanda, J., Zapata, A. & Isaza, E. (2007). Protección
contra la corrosión por medio del rociado térmico. Scientia
Et Technica 34: 237 - 243.
Marulanda, J. (2006). Fundamentos de la corrosión. Pereira:
Universidad Tecnológica de Pereira (UTP).
Sainz, M., Osendi, M. & Miranzo, P. (2008). Protective
Si–Al–O–Y glass coatings on stainless steel in situ prepared
by combustion flame spraying. Surface & Coatings Technology
(9), 1712-1717.
Pawlowski, L. (2008). Finely grained nanometric and
submicrometric coatings by thermal spraying: A review.
Surface & Coatings Technology 202 (18), 4318-4328.
Rapp, R. (2002). Hot corrosion of materials: fluxing
mechanism? Corrosion science 44 (2): 209-221.
Báez, S., Tristancho, J., Peña, D. & Vásquez, C. (2004).
La espectroscopia de impedancia electroquímica (EIS)
aplicada al estudio del mecanismo de la corrosión en caliente
por sales fundidas. Dyna, 71, 39-47.
Singh, H., Singh, B. & Prakash, S. (2006). The role of HVOF
coatings in improving hot corrosion resistance of ASTMSA210
GrA1 steel in the presence of Na2SO4–V2O5 salt deposits.
Surface & Coatings Technology 200 (18-19), 5386-5394.
ASTM Standard G1-03. (2003). “Standard Practice for
Preparing, Cleaning, and Evaluating Corrosion Test Specimens”.
ASTM International, West Conshohocken.
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