Electrodeposition of the Ni-Mo+MoO₂ Composite Electrocoatings

Abstract:

The Ni-Mo+MoO₂ composite coatings were obtained onto the steel substrate using an in situ co-deposition of a Ni-Mo alloy and MoO₂ powder particles maintained in suspension in the potassium pyrophosphate bath. To characterize the physical and chemical properties of the obtained coatings, SEM, EDS, and XRD methods, were applied. It was found that the co-deposited MoO₂ particles strongly influenced the properties of the Ni-Mo alloy coating. In comparison with the comparable Ni-Mo deposit containing 45 at.% of Mo, the presence of MoO₂ embedded into the composite coating diminished the content of Mo alloyed with Ni to 23 at.%. The electrodeposited Ni-Mo+MoO₂ composite coating obtained under proposed electrochemical conditions contained 25 at.% of MoO₂. The effect of the embedded MoO₂ as composite component on changes of the surface morphology and structure of the Ni-Mo binary alloy, was also discussed.

• Periodical: Solid State Phenomena (Volume 228)
• Pages: 132-137
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.228.132
• Online since: March 2015
• Authors: B. Łosiewicz*, Grzegorz Dercz, Magdalena Popczyk
• Keywords: Co-Deposition, Composite Electrocoatings, Molybdenum(IV) Oxide, Ni-Mo+MoO₂

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