Electrocrystallisation of zinc from acidic sulphate baths; A nucleation and crystal growth process

Vasilakopoulos, D; Bouroushian, M; Spyrellis, N

dc.contributor.author	Vasilakopoulos, D	en
dc.contributor.author	Bouroushian, M	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:30:19Z
dc.date.available	2014-03-01T01:30:19Z
dc.date.issued	2009	en
dc.identifier.issn	0013-4686	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19548
dc.subject	Chronoamperometry	en
dc.subject	Crystal growth	en
dc.subject	Electrocrystallisation	en
dc.subject	Nucleation	en
dc.subject	Zinc electrodeposition	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Carbon steel	en
dc.subject.other	Chronoamperometry	en
dc.subject.other	Crystal growth	en
dc.subject.other	Crystallization	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Grain boundaries	en
dc.subject.other	Nucleation	en
dc.subject.other	Rate constants	en
dc.subject.other	Sodium chloride	en
dc.subject.other	Three dimensional	en
dc.subject.other	Acidic baths	en
dc.subject.other	Ad-atoms	en
dc.subject.other	Cathodic overpotentials	en
dc.subject.other	Cathodic potentials	en
dc.subject.other	Charge-transfer	en
dc.subject.other	Classical theories	en
dc.subject.other	Critical nucleus sizes	en
dc.subject.other	Crystal growth process	en
dc.subject.other	Electrochemical nucleations	en
dc.subject.other	Electrocrystallisation	en
dc.subject.other	Heterogeneous nucleations	en
dc.subject.other	Low-carbon steels	en
dc.subject.other	Nucleation rates	en
dc.subject.other	Over potentials	en
dc.subject.other	Reasonable values	en
dc.subject.other	Sulphate baths	en
dc.subject.other	Two-dimensional	en
dc.subject.other	Zinc electrodeposition	en
dc.subject.other	Zinc	en
dc.title	Electrocrystallisation of zinc from acidic sulphate baths; A nucleation and crystal growth process	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.electacta.2008.11.059	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.electacta.2008.11.059	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The electrochemical nucleation and growth of zinc on low-carbon steel from acidic (pH 2.0-4.5) baths containing ZnSO4, NaCl, and H3BO3, was studied by means of chronoamperometry at various cathodic potentials under a charge-transfer controlled regime. It is shown that at overpotentials in the range 0.30-0.55 V (negative to the Zn2+/Zn redox value) the electrodeposition proceeds by instantaneous three-dimensional nucleation, which turns to progressive at higher overpotentials and/or very acidic baths. At low cathodic overpotentials (<0.30 V), a two-dimensional contribution limited by the incorporation of Zn ad-atoms in the developing lattice becomes significant at the early stages of deposition, and is more progressive in type the more acidic is the bath pH. Nucleation rate constants were calculated and correlated analytically with the respective potentials, using the classical theory of heterogeneous nucleation, which though fails to lead to reasonable values for the critical nucleus size. © 2008 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.2008.11.059	en
dc.identifier.isi	ISI:000264743900017	en
dc.identifier.volume	54	en
dc.identifier.issue	9	en
dc.identifier.spage	2509	en
dc.identifier.epage	2514	en