Electrodeposition and characterisation of nanocrystalline Ni–Mo coatings

• Published in: Surface & coatings technology Vol. 211; pp. 67 - 71
• Main Authors: Beltowska-Lehman, E., Bigos, A., Indyka, P., Kot, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 25-10-2012; Elsevier
• Subjects: Applied sciences; Citrate bath; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Induced electrodeposition; Materials science; Metallic coatings; Metals. Metallurgy; Micromechanical properties; Ni–Mo nanocrystalline coatings; Physics; Production techniques; Surface treatment; Surface treatments; Micromechanical properties; Ni–Mo nanocrystalline coatings; Citrate bath; Induced electrodeposition; Metal coating; Citrates; Electrodeposition; Surface treatments; Ni-Mo nanocrystalline coatings; Nanocrystal
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2011.10.011

In the present study suitable plating conditions for electrodeposition of thick, crack-free coatings at moderate temperatures and current densities with reasonable current efficiency have been developed. Ni–Mo coatings (5–22wt.% Mo) were electrodeposited on steel substrates from sulphate–citrate baths under controlled hydrodynamic conditions. The microstructure, residual stresses, adhesion, microhardness and wear resistance of the coatings, deposited at different current densities were examined. The tribological properties of compact and adherent Ni–Mo deposits obtained in optimum conditions were compared with the behaviour of the electrodeposited chromium coatings.
► Plating conditions for obtaining nanocrystalline Ni–Mo coatings were developed. ► Current density effect on composition and mechanical properties was determined. ► Ni–Mo alloys could be an alternative to hard chromium coatings.