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Structural evolution, thermomechanical recrystallization andelectrochemical corrosion properties of Ni-Cu-Mg amorphous coatingon mild steel fabricated by dual-anode electrolytic processing

Abdulwahab, M and Fayomi, O. S. I and Popoola, A. P. I. (2016) Structural evolution, thermomechanical recrystallization andelectrochemical corrosion properties of Ni-Cu-Mg amorphous coatingon mild steel fabricated by dual-anode electrolytic processing. Applied Surface Science. pp. 162-168.

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Abstract

tThe electrolytic Ni-Cu based alloy coating with admixed interfacial blend of Mg have been successfullyprepared on mild steel substrate by dual anode electroplating processes over a range of applied currentdensity and dwell time. The electrocodeposition of Ni-Cu-Mg coating was investigated in the presence ofother bath additives. The influence of deposition current on surface morphology, adhesion behavior, pre-ferred crystal orientation, surface topography and electrochemical activity of Ni-Cu-Mg alloy coating onmild steel were systematically examined. The thermal stability of the developed composite materials wasexamined via isothermal treatment. Scanning electron microscope equipped with EDS, X-ray diffraction,Atomic force microscope, micro-hardness tester and 3 �metrohm Potentiostat/galvanostat were used tocompare untreated and isothermally treated electrocodeposited composite. The induced activity of theNi-Cu-Mg alloy changed the surface modification and results to crystal precipitation within the structuralinterface by the formation of Cu,Ni2Mg3phase. The obtained results showed that the introduction of Mgparticles in the plating bath generally modified the surface and brings an increase in the hardness and cor-rosion resistance of Ni-Cu-Mg layers fabricated. Equally, isothermally treated composites demonstratedan improved properties indicating 45% increase in the micro-hardness and 79.6% corrosion resistancewhich further showed that the developed composite is thermally stable

Item Type: Article
Uncontrolled Keywords: Structural interfaceCorrosionAmorphousCrystal growthIsothermal treatmenta
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 05 Sep 2016 13:28
Last Modified: 05 Sep 2016 13:28
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/7103

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