Published 2022 | Version v1
Journal article Metadata-only

Effect of rare earth on the corrosion resistance of electroless Ni-Mo-P composite coatings

Creators

  • 1. Xi'an University of Science and Technology, College of Materials Science and Engineering, Xi'an, Shaanxi, (China)

Description

A kind of corrosion-resistant Ni-Mo-P composite coating was deposited on the surface of AZ91D magnesium alloy substrate by electroless plating method with different concentration of Ce(NO3)3 and Nd(NO3)3 . The deposition mechanism of Ni-Mo-P composite coating was explored. Furthermore, the effects of Ce(NO3)3 and Nd(NO3)3 concentration on the microstructure and properties of Ni-Mo-P composite coatings were studied. Results indicated that the Ni-Mo-P composite coatings prepared by adding the optimal concentration of Ce(NO3)3 and Nd(NO3)3 had few defects. Meanwhile, the deposition rate of the composite coatings and the adhesion between the coating and the magnesium alloy substrate were improved. When the concentration of Ce(NO3)3 and Nd(NO3)3 were 0.10 and 1.00 g/L, the NiMo-P composite coatings had the minimum corrosion rate of 0.826 and 0.681 g/m2·h, respectively. Herein, compared with the addition of Ce(NO3)3, the Nd(NO3)3 added Ni-Mo-P composite coating has the maximum arc radius of capacitive resistance and significant improvement corrosion resistance. (author)

Additional details

Identifiers

URL
https://www.scielo.br/j/mr/a/z7JGCHqKLg7ShFFgVtTqq9x/?format=pdf&lang=en;

Publishing Information

Journal Title
Materials Research (Sao Carlos, Online)
Journal Volume
25
Journal Page Range
14 p.
ISSN
1980-5373

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
53039869
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ADHESION; CERIUM NITRATES; COATINGS; COMPOSITE MATERIALS; CORROSION RESISTANCE; MAGNESIUM ALLOYS; MICROSTRUCTURE; MOLYBDENUM; NEODYMIUM NITRATES; NICKEL; PHOSPHORUS; PLATING; RARE EARTHS; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION
Descriptors DEC
ALLOYS; CERIUM COMPOUNDS; COHERENT SCATTERING; DEPOSITION; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; MATERIALS; METALS; MICROSCOPY; NEODYMIUM COMPOUNDS; NITRATES; NITROGEN COMPOUNDS; NONMETALS; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; REFRACTORY METALS; SCATTERING; SURFACE COATING; TRANSITION ELEMENTS