Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel

Mild steel is commonly used in the construction of Pipeline. The major problem of this Pipeline is corrosion. Effort is make my researchers to combat this problem. In this work Co-deposition of Ni-Co-SiO2 composite coating on mild steel was reported with the view to reduce this problem. The SiO2 was...

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Main Authors:	C.U. Atuanya, D.I. Ekweghiariri, C.M. Obele
Format:	Article
Language:	English
Published:	KeAi Communications Co., Ltd. 2018-02-01
Series:	Defence Technology
Subjects:	Co-deposition Corrosion Microstructure and coating
Online Access:	http://www.sciencedirect.com/science/article/pii/S2214914717301411

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spelling	doaj-c908b929611d4b759fffb0f0ef8758912021-05-02T05:45:11ZengKeAi Communications Co., Ltd.Defence Technology2214-91472018-02-01141646910.1016/j.dt.2017.10.001Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steelC.U. Atuanya0D.I. Ekweghiariri1C.M. Obele2Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Anambra State, NigeriaDepartment of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Anambra State, NigeriaDepartment of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, Anambra State, NigeriaMild steel is commonly used in the construction of Pipeline. The major problem of this Pipeline is corrosion. Effort is make my researchers to combat this problem. In this work Co-deposition of Ni-Co-SiO2 composite coating on mild steel was reported with the view to reduce this problem. The SiO2 was varies from 5 to 25wt% in the deposition. The microstructure, hardness values and potentiodynamic polarization in simulated sea water were determined. The results show that XRD pattern of the NiCo deposited mild steel revealed the presence hard phases of NiO, Co5Ni, Co2Ni3, NiCo5 while that of Ni-Co-SiO2 deposited mild steel revealed the presence harder phases of NiOSiO2, CoNi7Si2, Co5Ni2Si3. The NiCo-25SiO2 deposited sample has smaller particle size than Ni-10Co coating. Coating thickness of 110.7 μm was obtained for Ni-10Co coating, while coating thickness of 135.7, 157.7, 165.0 μm were obtained at Ni-10Co-xSiO2(x = 10, 15, 25wt%). 99.90% corrosion resistance was achieved at Ni-Co-25SiO2. This improvement in corrosion resistance after composites coating could be attributed to the hard and fine structure obtained after coating.http://www.sciencedirect.com/science/article/pii/S2214914717301411Co-depositionCorrosionMicrostructure and coating
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	C.U. Atuanya D.I. Ekweghiariri C.M. Obele
spellingShingle	C.U. Atuanya D.I. Ekweghiariri C.M. Obele Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel Defence Technology Co-deposition Corrosion Microstructure and coating
author_facet	C.U. Atuanya D.I. Ekweghiariri C.M. Obele
author_sort	C.U. Atuanya
title	Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
title_short	Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
title_full	Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
title_fullStr	Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
title_full_unstemmed	Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
title_sort	experimental study on the microstructural and anti-corrosion behaviour of co-deposition ni–co–sio2 composite coating on mild steel
publisher	KeAi Communications Co., Ltd.
series	Defence Technology
issn	2214-9147
publishDate	2018-02-01
description	Mild steel is commonly used in the construction of Pipeline. The major problem of this Pipeline is corrosion. Effort is make my researchers to combat this problem. In this work Co-deposition of Ni-Co-SiO2 composite coating on mild steel was reported with the view to reduce this problem. The SiO2 was varies from 5 to 25wt% in the deposition. The microstructure, hardness values and potentiodynamic polarization in simulated sea water were determined. The results show that XRD pattern of the NiCo deposited mild steel revealed the presence hard phases of NiO, Co5Ni, Co2Ni3, NiCo5 while that of Ni-Co-SiO2 deposited mild steel revealed the presence harder phases of NiOSiO2, CoNi7Si2, Co5Ni2Si3. The NiCo-25SiO2 deposited sample has smaller particle size than Ni-10Co coating. Coating thickness of 110.7 μm was obtained for Ni-10Co coating, while coating thickness of 135.7, 157.7, 165.0 μm were obtained at Ni-10Co-xSiO2(x = 10, 15, 25wt%). 99.90% corrosion resistance was achieved at Ni-Co-25SiO2. This improvement in corrosion resistance after composites coating could be attributed to the hard and fine structure obtained after coating.
topic	Co-deposition Corrosion Microstructure and coating
url	http://www.sciencedirect.com/science/article/pii/S2214914717301411
work_keys_str_mv	AT cuatuanya experimentalstudyonthemicrostructuralandanticorrosionbehaviourofcodepositionnicosio2compositecoatingonmildsteel AT diekweghiariri experimentalstudyonthemicrostructuralandanticorrosionbehaviourofcodepositionnicosio2compositecoatingonmildsteel AT cmobele experimentalstudyonthemicrostructuralandanticorrosionbehaviourofcodepositionnicosio2compositecoatingonmildsteel
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Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel

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