EVALUATION OF PASSIVATION OF THE AUSTENITIC FeMnAl ALLOY

Authors

  • Willian Arnulfo Aperador Chaparro Profesor Universidad Militar Nueva Granada
  • Alejandro Vargas Uscategui Estudiante Doctorado Doctorado en Ciencias de la Ingeniería, Mención Ciencia de los Materiales. Facultad de Ciencias Físicas y Matemáticas, Universidad del Chile. Santiago, CHILE
  • Juan David Betancur Rí­os Corporación para la Investigación de la Corrosión, CIC. Piedecuesta, Santander. COLOMBIA.

Abstract

In this paper, we assess the state of passivation for corrosion protection of three (3) samples of the Fermanal steel (FeMnAl) with nominal composition Fe-22.6Mn - 6.3Al - 3.1Cr - 0.675C (AF1 ), Fe-28.0Mn - 5.2Al - 5.1Cr - 2.8 Si - 0.95C (AF2), Fe-30.0Mn - 8.5Al - 3.2Cr - 1.1 Si - 1.0C (AF3), in contact with an aqueous solution of NaOH to 10% w/w. AISI 316 stainless steel (AI) was used as reference material. Electrochemical evaluation was performed using anodic polarization curves and electrochemical impedance spectroscopy (EIS). Surface morphology and composition of the material exposed to corrosive attack was determined by optical microscopy (OM) and X-ray diffraction (XRD). The results indicate that the electrochemical behavior of the alloy AF1 is similar to AISI 316. The OM and XRD measurements show the probable formation of oxides of manganese and aluminum compounds that could generate passivation   of FeMnAl steel.

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Author Biographies

Willian Arnulfo Aperador Chaparro, Profesor Universidad Militar Nueva Granada

Ingeniería Mecatrónica, Coordinador Maestría en Ingeniería Mecatrónica

Alejandro Vargas Uscategui, Estudiante Doctorado Doctorado en Ciencias de la Ingeniería, Mención Ciencia de los Materiales. Facultad de Ciencias Físicas y Matemáticas, Universidad del Chile. Santiago, CHILE

Facultad de Ciencias Físicas y Matemáticas, Universidad del Chile. Santiago, CHILE

Juan David Betancur Rí­os, Corporación para la Investigación de la Corrosión, CIC. Piedecuesta, Santander. COLOMBIA.

Director Departamento de Protección Catódica

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Published

2011-09-21

How to Cite

Aperador Chaparro, W. A., Vargas Uscategui, A., & Betancur Rí­os, J. D. (2011). EVALUATION OF PASSIVATION OF THE AUSTENITIC FeMnAl ALLOY. LatinAmerican Journal of Metallurgy and Materials, 236–243. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/257

Issue

2012, 32(2)

Section

Regular Articles

License

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