Formulation of a criterion predicting the development of uniform regular and non-uniform abnormal porous anodic alumina coatings and revealing the mechanism of their appearance and progress

Patemarakis, G; Moussoutzanis, K

dc.contributor.author	Patemarakis, G	en
dc.contributor.author	Moussoutzanis, K	en
dc.date.accessioned	2014-03-01T01:16:36Z
dc.date.available	2014-03-01T01:16:36Z
dc.date.issued	2001	en
dc.identifier.issn	0010-938X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14107
dc.subject	Aluminium	en
dc.subject	Anodizing	en
dc.subject	Criterion	en
dc.subject	Regular and abnormal oxide development	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.other	Current density	en
dc.subject.other	Electrolytes	en
dc.subject.other	Growth (materials)	en
dc.subject.other	Non-uniform films	en
dc.subject.other	Thick films	en
dc.subject.other	oxidation	en
dc.title	Formulation of a criterion predicting the development of uniform regular and non-uniform abnormal porous anodic alumina coatings and revealing the mechanism of their appearance and progress	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0010-938X(00)00161-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0010-938X(00)00161-X	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	A transport analysis criterion, predicting the conditions of uniform regular and non-uniform abnormal oxide growth and verified by different experimental methods, was discovered. As shown, the partial derivative of electrolyte concentration at pore bases to current density at the initial stages of anodization is the decisive parameter; when partial derivativeC(a,b)/partial derivativej < 0 and <partial derivative>C-a,C-b/partial derivativej >0 the oxide growth becomes necessarily regular and abnormal respectively. By this criterion the mechanisms of regular and abnormal development of oxide were also successfully revealed. Their knowledge is important since methods may be developed to produce uniform thick films even in conditions where otherwise non-uniform films are formed. (C) 2001 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Corrosion Science	en
dc.identifier.doi	10.1016/S0010-938X(00)00161-X	en
dc.identifier.isi	ISI:000169447700003	en
dc.identifier.volume	43	en
dc.identifier.issue	8	en
dc.identifier.spage	1433	en
dc.identifier.epage	1464	en