J. A. Sanabria-Cala, G. R. Conde-Rodriguez, D. A. Laverde-Catano, D. Y. Pena-Ballesteros, and H. A. E. Duran, “Influence of Exposure Time on Morphological and Electrochemical Properties of Corrosion Products Formed by High Temperature Sulfidation of AISI/SAE-1020 Steel ”, Chemical Engineering Transactions, vol. 70, pp. 1645-1650, Aug. 2018.