Morphological and Corrosion Characterization of Electroless Ni-P Coatings Deposited on Ductile Iron
Por:
Ortiz N., González-Parra J.R., Olaya J., Agredo D., Valdez R., Waage H., Bolarín A.M., Sánchez F., Barba-Pingarrón A.
Publicada:
1 ene 2024
Resumen:
Ductile iron is distinguished by its balance of mechanical properties and other advantageous characteristics, including its capacity to absorb energy. This makes it suitable for applications requiring high strength. However, its performance is impaired by its low corrosion resistance. In this study, a Ni-P coating was applied to the surface of ductile cast iron using electroless nickel plating to increase its corrosion resistance in 0.1 M NaCl. The characterization of the substrate and the coated materials was conducted using scanning electron microscopy, X-ray diffraction, electrochemical impedance spectroscopy, and electrochemical noise. The results show that the coating deposited on a ductile iron is amorphous, compact, homogeneous, and well-adhered. The surface hardness is increased by 53%. Also, a notable increase in corrosion resistance is evidenced by the blocking effect of the coating that delimits the access of the electrolyte to the ductile iron coating. The corrosion mechanism is related to the mixed and localized corrosion phenomena for the different evaluation times. © 2024 by the authors.
Filiaciones:
Ortiz N.:
Departamento de Ingeniería Mecánica y Mecatrónica—Bogotá, Facultad de Ingeniería, Universidad Nacional de Colombia, Bogota, 16486, Colombia
González-Parra J.R.:
Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
Olaya J.:
Departamento de Ingeniería Mecánica y Mecatrónica—Bogotá, Facultad de Ingeniería, Universidad Nacional de Colombia, Bogota, 16486, Colombia
Agredo D.:
Departamento de Ingeniería Mecánica y Mecatrónica—Bogotá, Facultad de Ingeniería, Universidad Nacional de Colombia, Bogota, 16486, Colombia
Valdez R.:
Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
Waage H.:
Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
Bolarín A.M.:
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
Sánchez F.:
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
Barba-Pingarrón A.:
Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
gold, All Open Access; Gold Open Access
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