CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Evaluation of the corrosion resistance of electroless Ni-P coatings on magnesium
Autor/es:
ANDERSON SANDOVAL AMADOR; DARÍO YESID PEÑA BALLESTEROS; FÉLIX ECHEVERRÍA ECHEVERRÍA; LAURA QUIROZ RAMÍREZ; JUAN GUILLERMO CASTAÑO GONZÁLEZ
Revista:
REVISTA MATéRIA
Editorial:
UNIV FED RIO DE JANEIRO
Referencias:
Lugar: Rio de Janeiro; Año: 2020 vol. 25
ISSN:
1517-7076
Resumen:
Magnesium and its alloys offer a wide range of applications due to their excellent properties, however, their high chemical reactivity depends on their possible application in environments that have high chloride contents, because the development of an efficient method of surface protection and Easy implementation on an industrial scale is necessary. In the present work, nickel-phosphorus (Ni-P) electrolytic coatings on magnesium substrates were obtained from a chromate-free method. Subsequently, these coatings were evaluated electrochemically by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in NaCl 3.5% wt solution. The results indicate that the coatings obtained manage to produce greater thermodynamic stability to the magnesium surfaces and reduce approximately the corrosion rate by a factor of 1000. Therefore, the methodology for obtaining the Nickel-phosphorus coatings that we propose in this work is susceptible to industrial scale.