Preparation and characterization of electroless Ni-P-Fe3O4 composite coatings and evaluation of its high temperature oxidation behaviour |
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Authors: | AA Zuleta OA Galvis F Echeverría MP Hierro |
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Affiliation: | a Grupo de Corrosión y Protección, Universidad de Antioquia, Medellín, Colombia b G.I. de Ingeniería de Superficies, Universidad Complutense, Madrid, Spain |
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Abstract: | Ni-P coatings modified with synthetic magnetite were prepared by electroless technique from a Ni-P plating bath containing magnetite powder. The coatings morphology was studied by means of scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS). The corrosion resistance at room temperature of the Ni-P films modified with magnetite was evaluated by means of electrochemical impedance spectroscopy (EIS), where the composite films exhibited a better behaviour. The films resistance to high temperature oxidation was evaluated by cyclic oxidation tests, SEM/EDS and X-ray diffraction analysis (XRD), where the coating with iron oxides appears to be more protective. |
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Keywords: | Electroless plating Composite coating Ni-P Magnetite Cyclic oxidation |
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