Aluminium anodising in low acidity sulphate baths: Growth mechanism and nanostructure of porous anodic films

Patermarakis, G

dc.contributor.author	Patermarakis, G	en
dc.date.accessioned	2014-03-01T01:23:33Z
dc.date.available	2014-03-01T01:23:33Z
dc.date.issued	2006	en
dc.identifier.issn	1432-8488	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17019
dc.subject	Chronopotentiometry and overall kinetics	en
dc.subject	Growth mechanism and nanostructure	en
dc.subject	Interface colloidal Al 2(SO4)3	en
dc.subject	Low acidity sulphate baths	en
dc.subject	Porous anodic aluminas	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Aluminum	en
dc.subject.other	Anodic oxidation	en
dc.subject.other	Nanostructured materials	en
dc.subject.other	Porous materials	en
dc.subject.other	Supersaturation	en
dc.subject.other	Thick films	en
dc.subject.other	Chronopotentiometry and overall kinetics	en
dc.subject.other	Growth mechanism and nanostructure	en
dc.subject.other	Interface colloidal Al (SO)	en
dc.subject.other	Low acidity sulphate baths	en
dc.subject.other	Porous anodic alumina	en
dc.subject.other	Film growth	en
dc.title	Aluminium anodising in low acidity sulphate baths: Growth mechanism and nanostructure of porous anodic films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10008-005-0665-7	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10008-005-0665-7	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Overall kinetic and chronopotentiometric studies were performed during Al anodising in H2SO4, 0-5% w/v, bath solutions pure and saturated by Al-2(SO4)(3). Peculiarities in film growth mechanism and nanostructure in these cases appeared, like significant differences of porosity and its dependence on film thickness, different critical current density above which pitting appears, salt deposition on pitted surface regions in saturated bath, etc. The different conditions inside pores are responsible for this behaviour like almost depletion of H+ during a long initial transient stage in the first case, supersaturation and formation of Al-2(SO4)(3) nanoparticle micelles on pore surface in the second case, etc. Differences in film growth mechanism also appeared between these and alike baths at higher acidity. Anodising in low acidity saturated baths shows superiority for growing low porosity films at specific conditions. New technologies may be suggested to produce optimal films of desired structure.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Solid State Electrochemistry	en
dc.identifier.doi	10.1007/s10008-005-0665-7	en
dc.identifier.isi	ISI:000235126700004	en
dc.identifier.volume	10	en
dc.identifier.issue	4	en
dc.identifier.spage	211	en
dc.identifier.epage	222	en