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Title: Co-Fe-Sn alloy nano-coatings using sono-enhanced macromolecule organic carriers : green chemistries in conjunction with nano-technology towards environmentally friendly electroplating
Author: Cocozza, Vincent
ISNI:       0000 0004 2718 5535
Awarding Body: Glasgow Caledonian University
Current Institution: Glasgow Caledonian University
Date of Award: 2010
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A holistic approach to replacing chromium bright plate and the associated wastes from that electroplating industry is taken. The ideas and strategies associated with integrating nanotechology coating production with green chemistries are explored in new horizons for metallic coatings. Thus a literature review of metal coating technology, exploring the best and commonly accepted technology along with new and emerging plating technology is presented. This places emphasis on selection of metal alloy replacements (Mo, Fe, Co, Sn) for Cr and Cr alloys. Selection of final metals for trial in experimental alloys related to their considered contribution towards bright finish and their physical and corrosion properties. Based on the concept of using a large organic delivery molecule to produce nano-metallic plate structures, two ligands were employed, Gluconate (G) and Dithizone (D). Co/Fe and Co/Fe/Sn experimental alloys were produced (using these ligand metal complexes) via four plating technology systems (galvanic batch process, dynamic flow process, sonochemical process and brush sono technique). Electroplate coating thicknesses are reported via calculations employing density, mass and volume considerations. Chemical and structural analysis i.e. (XRD, AAS, SEM, AFM), hardness via the phase tool within the AFM system are reported. Decisions about future work are reported, based on fmdings and progress to date. These findings indicate coating thickness in the range 3.58 IlID to 69.45 urn and relate them to plating conditions and methodology. They also illustrate that nano-coatings are being produced but there is inconsistency of the surface structures i.e. individual nano-particles (of the order 140 nm diameter) are seen, but also conglomerates as large as 4000 nm diameter are observed. Reassessment of the whole research obtainable goals, for this area of advancement, within a 3-year time frame is made. The plating processes and production of test specimens is concluded to be far too labour intensive and a step limiting factor in this research. To this end, a major final conclusion relating to the use of robotics and automation of experimental plating processes is presented as an aid to future research.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available