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Solid surface and field catalysed interface formation of colloidal Al2(SO4)3 during Al anodizing affecting the kinetics and mechanism of development and structure of porous oxides

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dc.contributor.author Patermarakis, G en
dc.contributor.author Moussoutzanis, K en
dc.date.accessioned 2014-03-01T01:18:21Z
dc.date.available 2014-03-01T01:18:21Z
dc.date.issued 2002 en
dc.identifier.issn 1432-8488 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/14949
dc.subject Field and solid surface catalysis en
dc.subject Interface colloidal aluminum sulfate en
dc.subject Kinetics mechanism and structure en
dc.subject Porous anodic alumina en
dc.subject.classification Electrochemistry en
dc.subject.other aluminum en
dc.subject.other electrolyte en
dc.subject.other oxide en
dc.subject.other sulfate en
dc.subject.other sulfuric acid en
dc.subject.other article en
dc.subject.other catalysis en
dc.subject.other chemical modification en
dc.subject.other chemical reaction kinetics en
dc.subject.other chemical structure en
dc.subject.other colloid en
dc.subject.other density en
dc.subject.other electrochemical analysis en
dc.subject.other porosity en
dc.subject.other potentiometry en
dc.subject.other solid state en
dc.subject.other theory en
dc.subject.other thermodynamics en
dc.title Solid surface and field catalysed interface formation of colloidal Al2(SO4)3 during Al anodizing affecting the kinetics and mechanism of development and structure of porous oxides en
heal.type journalArticle en
heal.identifier.primary 10.1007/s10008-001-0253-4 en
heal.identifier.secondary http://dx.doi.org/10.1007/s10008-001-0253-4 en
heal.language English en
heal.publicationDate 2002 en
heal.abstract Overall kinetic and potentiometric studies of the growth of porous anodic alumina films in saturated H2SO4 + Al-2(SO4)(3) electrolyte showed non-saturation conditions inside the pores and supersaturation conditions at the pore surface/electrolyte interface where the field and the solid surface catalyse the formation of colloidal Al-2(SO4)(3) micelles. Suitable high-strength field thermodynamically sustained electrochemical and chemical kinetic equations were formulated. It was shown that the diameter and surface fraction of charge exchange at the pore bases, the real pore wall surface fraction where oxide dissolution occurs, and its rate are strongly affected by the conditions. The mechanism of growth and structure of the films are quite different from those in H2SO4. A mechanism of regular film growth is imposed and the critical current density, above which pitting appears, strongly increases. The formulated theory may predict improved or new Al anodizing technologies. en
heal.publisher SPRINGER-VERLAG en
heal.journalName Journal of Solid State Electrochemistry en
dc.identifier.doi 10.1007/s10008-001-0253-4 en
dc.identifier.isi ISI:000178151600006 en
dc.identifier.volume 6 en
dc.identifier.issue 7 en
dc.identifier.spage 475 en
dc.identifier.epage 484 en


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