PREPARATION AND EVALUATION BY CICLIC OXIDATION AT 700°C OF ELECTROLESS Ni-P AND Ni-P-MAGNETITE COATINGS

Authors

  • Jacqueline Corredor Acuña Profesora ocasional de tiempo completo - Universidad de Pamplona
  • Félix Echeverría Echeverría Profesor - Universidad de Antioquia

Abstract

The cyclical oxidation behavior of the electroless Ni-P coating and of the Ni-P-pure magnetite and Ni-P-Al- doped magnetite composite coatings on stainless steel has been studied. During the tests, the bare steel lost mass catastrophically, whilst the samples of coated steel lost mass in a very small amount, showing oxide growth curves that agreed with successive parabolic laws. X-ray diffraction studies of the oxides confirmed that the phases with major concentration were α-Fe2O3 on bare steel, NiO on ENP and NiMnx Cr2-x O4 (with x=0.2 and 1) on composite coatings. The scanning electron microscopy and energy dispersive spectroscopy analyses showed that both, the oxide scale and the coatings evaluated hindered the inward diffusion of oxygen towards the steel substrate.

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Published

2011-07-24

How to Cite

Corredor Acuña, J., & Echeverría Echeverría, F. (2011). PREPARATION AND EVALUATION BY CICLIC OXIDATION AT 700°C OF ELECTROLESS Ni-P AND Ni-P-MAGNETITE COATINGS. LatinAmerican Journal of Metallurgy and Materials, 107–120. Retrieved from https://rlmm.org/ojs/index.php/rlmm/article/view/146

Issue

2012, 32(1)

Section

Regular Articles

License

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