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Vacuum thermal treated electroless NiP-TiO2 composite coatings

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dc.contributor.author Novakovic, J en
dc.contributor.author Vassiliou, P en
dc.date.accessioned 2014-03-01T01:32:23Z
dc.date.available 2014-03-01T01:32:23Z
dc.date.issued 2009 en
dc.identifier.issn 0013-4686 en
dc.identifier.uri http://hdl.handle.net/123456789/20108
dc.subject Composite en
dc.subject Corrosion resistance en
dc.subject Electroless Ni-P en
dc.subject Hardness en
dc.subject TiO2 en
dc.subject.classification Electrochemistry en
dc.subject.other Corrosion resistance en
dc.subject.other Crystalline materials en
dc.subject.other Hardness en
dc.subject.other Heat resistance en
dc.subject.other Metallic matrix composites en
dc.subject.other Nickel en
dc.subject.other Nickel oxide en
dc.subject.other Sodium en
dc.subject.other Sodium chloride en
dc.subject.other Suspensions (fluids) en
dc.subject.other Titanium en
dc.subject.other Titanium dioxide en
dc.subject.other Titanium oxides en
dc.subject.other Vacuum en
dc.subject.other Amorphous structures en
dc.subject.other Bath concentrations en
dc.subject.other Chemical compositions en
dc.subject.other Composite en
dc.subject.other Crystalline layers en
dc.subject.other Electroless en
dc.subject.other Electroless depositions en
dc.subject.other Electroless Ni-P en
dc.subject.other Ni-P coatings en
dc.subject.other Nickel matrixes en
dc.subject.other P-matrices en
dc.subject.other Potentiodynamic polarization measurements en
dc.subject.other Sodium chloride solutions en
dc.subject.other Steel substrates en
dc.subject.other TiO en
dc.subject.other Vacuum heat treatments en
dc.subject.other Composite coatings en
dc.title Vacuum thermal treated electroless NiP-TiO2 composite coatings en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.electacta.2008.12.015 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.electacta.2008.12.015 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract Composite NiP-TiO2 layers were prepared by simultaneous electroless deposition of Ni-P and TiO2 on steel substrate, from a solution in which TiO2 particles were kept in suspension by stirring. Deposits were characterized for its Structure, morphology and hardness. It was found that the chemical composition of Ni-P matrix has been influenced by the incorporation of TiO2 particles. TiO2 particle incorporation increases with increase in their bath concentrations (0.5-2.0g/l). An improvement (up to 20%) in micro-hardness was observed in both as plated and vacuum heat-treated composite coatings compared to Ni-P coatings. Electroless deposited composite coatings exhibit an amorphous structure of the nickel matrix in which crystalline titanium oxide is incorporated. Vacuum heat treatment leads to the formation of a crystalline layer in which the Ni and Ni3P Crystallites appear apart from those of the TiO2 (anatase). Potentiodynamic polarization measurements made on these deposits in 3.5 wt.% sodium chloride solution showed decrease in the corrosion resistance for the as-plated and heat-treated composite coatings. (C) 2009 Elsevier Ltd. All rights reserved. en
heal.publisher PERGAMON-ELSEVIER SCIENCE LTD en
heal.journalName Electrochimica Acta en
dc.identifier.doi 10.1016/j.electacta.2008.12.015 en
dc.identifier.isi ISI:000264743900015 en
dc.identifier.volume 54 en
dc.identifier.issue 9 en
dc.identifier.spage 2499 en
dc.identifier.epage 2503 en


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