Fabrication and characterization of corrosion resistant amorphous-nanocrystalline alloy Ni49Co3Mo22B26 by galvanostatic deposition
Year: 2024
Type: article
Abstract: Amorphous materials have unique physical properties but have limited practical use due to their low ductility and thermal instability. A quaternary Ni 49 Co 3 Mo 22 B 26 amorphous-nanocrystalline plating was prepared by electrodeposition to obtain good hardness, corrosion resistance , and thermal stability. Multiple electrolyte baths with boric acid concentration ranging from 0.3 M to 0.8 M were investigated to study the co-deposition pattern of molybdenum (Mo) and boron (B) with iron-group elements. Experimentations suggest that an array of binary, ternary, and quaternary alloys can be fabricated by adjusting boric acid concentration in an electrolyte bath. Energy Dispersive X-ray Spectroscopy (EDS) analysis shows that co-deposition of Mo requires sluggish mass transport of iron group element nickel (Ni) and cobalt (Co) and high boric acid concentration retards Mo deposition entirely. X-ray diffraction (XRD) patterns were examined to identify the formation of amorphous-nanocrystalline film deposition . An average hardness for quaternary Ni-Co-Mo-B deposit samples was measured between the range of 380 HV- 450 HV, and the hardness increases with increased B content. Electrochemical corrosion tests reveal that the addition of Mo in quaternary Ni-Co-Mo-B increases corrosion performance in saline environments but reduces corrosion performance in acidic environments over Ni-Co-B amorphous alloy . Differential scanning calorimetry (DSC) scan shows that prepared amorphous-nanocrystalline material has thermal stability up to 346 °C without undergoing phase change.
Authors: M.F. Yasir, M. Sundaram
Institution: University of Cincinnati
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,300
Funder: National Science Foundation
OpenAlex ID: W4403344450