Vacuum thermal treated electroless NiP-TiO2 composite coatings

Novakovic, J; Vassiliou, P

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	https://dspace.lib.ntua.gr/xmlui/handle/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