Estudio de los productos de corrosión de aceros al carbono en la atmósfera tropical de Panamá

J. A. Jaén; M. S. de Villalaz; L. de Araque; C. Hernández; A. de Bósquez

doi:10.3989/revmetalm.2003.v39.iExtra.1093

Study of the corrosion products formed on carbon steels in the tropical atmosphere of Panama

Authors

J. A. Jaén Departamento de Química Física, Facultad de Ciencias Naturales, Exactas y Tecnología. Universidad de Panamá
M. S. de Villalaz Centro Experimental de Ingeniería, Universidad Tecnológica de Panamá
L. de Araque Centro Experimental de Ingeniería, Universidad Tecnológica de Panamá
C. Hernández Centro Experimental de Ingeniería, Universidad Tecnológica de Panamá
A. de Bósquez Centro Experimental de Ingeniería, Universidad Tecnológica de Panamá

DOI:

https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1093

Keywords:

Atmospheric corrosion, Carbon steels, Tropical atmosphere, Corrosion products, Mössbauer spectroscopy

Abstract

Mössbauer spectroscopy and X-ray powder diffraction (in selected samples) have been used to characterize corrosion products on carbon steels after atmospheric exposure to the tropical Panamanian locations of Panama and Colon, classified according to ISO 9223 as C3 and C5, respectively. Goethite (α-FeOOH) of intermediate particle size (20-100 nm), lepidocrocite (γ-FeOOH), a spinel phase consisting of non-stoichiometric magnetite (Fe_3-xO₄) and/or maghemite (γ-Fe₂O₃) and nano-sized particles were identified in the corrosion products. The spinel phase is related to short term atmospheric exposure transforms in time to other corrosion products. The corrosion resistance increased with fraction of goethite following a saturation-type behavior.

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Published

2003-12-17

How to Cite

Jaén, J. A., de Villalaz, M. S., de Araque, L., Hernández, C., & de Bósquez, A. (2003). Study of the corrosion products formed on carbon steels in the tropical atmosphere of Panama. Revista De Metalurgia, 39(Extra), 32–37. https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1093

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Issue

Vol. 39 No. Extra (2003)

Section

Articles

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