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International Journal of Corrosion
Volume 2012 (2012), Article ID 479761, 9 pages
Research Article

Hot Corrosion Behavior of High-Chromium, High-Carbon Cast Irons in NaCl-KCl Molten Salts

1CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, 62500 Cuernavaca, MOR, Mexico
2Gerencia de Materiales y Procesos Químicos, IIE, Calle Reforma 113, Colonia Palmira, 62490 Cuernavaca, MOR, Mexico
3Facultad de Ingeniería, Universidad Autónoma de Zacatecas, Eucalipto 801, 98068 Zacatecas, ZAC, Mexico

Received 23 May 2012; Revised 13 August 2012; Accepted 16 August 2012

Academic Editor: W. Ke

Copyright © 2012 S. Vuelvas-Rayo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A study on the corrosion behavior of a series of experimental high-chromium (18.53–30.48 wt.%), high-carbon (3.82–5.17%) cast irons in NaCl-KCl (1 : 1 M) at 670°C has been evaluated by using weight loss technique and compared with a 304-type stainless steel. It was found that all castings had a higher corrosion rate than conventional 304SS and that the addition of Cr increased the degradation rate of the cast irons. Additionally, corrosion rate increased by increasing the C contents up to 4.29%, but it decreased with a further increase in its contents. Results are discussed in terms of consumption of the Cr2O3 layer by the melt.