Interpretation of the promoting effect of sulphate salt additives on the development of non-uniform pitted porous anodic Al2O3 films in H2SO4 electrolyte by a transport phenomenon analysis theory

Patermarakis, G; Moussoutzanis, K

dc.contributor.author	Patermarakis, G	en
dc.contributor.author	Moussoutzanis, K	en
dc.date.accessioned	2014-03-01T01:52:06Z
dc.date.available	2014-03-01T01:52:06Z
dc.date.issued	2002	en
dc.identifier.issn	0010-938X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26564
dc.subject	anodising aluminium	en
dc.subject	pitting	en
dc.subject	sulphate additives effect	en
dc.subject	transport analysis theory	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.other	OXIDE-FILMS	en
dc.subject.other	ALUMINUM	en
dc.subject.other	GROWTH	en
dc.subject.other	MECHANISM	en
dc.subject.other	KINETICS	en
dc.subject.other	SULFATE	en
dc.subject.other	PORES	en
dc.title	Interpretation of the promoting effect of sulphate salt additives on the development of non-uniform pitted porous anodic Al2O3 films in H2SO4 electrolyte by a transport phenomenon analysis theory	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The equations describing the mass and charge transport phenomena and composition of the solution at pore bases during the reglllar/uniform growth of porous anodic alumina films in pure H2SO4 solution were suitably solved to describe them in H2SO4 +Al-2(SO4)(3) solution. The current densities at which the H2SO4 concentration becomes minimum at low film thicknesses were determined which coincided with the experimental ones above of which pitting appears. They decreased with the Al-2(SO4)(3) concentration. A theory was formulated explaining the promoting, effect of sulphate additives on pitting appearance which is important to develop methods for producing regularly grown high quality films. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	CORROSION SCIENCE	en
dc.identifier.isi	ISI:000175686400007	en
dc.identifier.volume	44	en
dc.identifier.issue	8	en
dc.identifier.spage	1737	en
dc.identifier.epage	1753	en