The mechanism of Zn corrosion in both aerated and deaerated aqueous KNO3 solutions

Roubani-Kalantzopoulou, F; Patermarakis, G; Karayianni, H

dc.contributor.author	Roubani-Kalantzopoulou, F	en
dc.contributor.author	Patermarakis, G	en
dc.contributor.author	Karayianni, H	en
dc.date.accessioned	2014-03-01T01:14:14Z
dc.date.available	2014-03-01T01:14:14Z
dc.date.issued	1998	en
dc.identifier.issn	0003-5599	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12944
dc.subject	corrosion	en
dc.subject	zinc	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.title	The mechanism of Zn corrosion in both aerated and deaerated aqueous KNO3 solutions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1108/00035599810368517	en
heal.identifier.secondary	http://dx.doi.org/10.1108/00035599810368517	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The corrosion of Zn in both aerated by air (O-2 + N-2), and deaerated by N-2, solutions of KNO3 at concentrations largely varying, 10(-5)-1 M, is studied. The corrosion process is followed in time by potentiometry and the potential of Zn electrode (vs. calomel) vs. time plots is derived. In both cases, a transition period is observed until a steady state is achieved where the rate of Zn2+ and OH- production becomes equal to the rate of Zn(OH), precipitate formation. In the aerated solutions the potential and corrosion rate decrease with time while in the deaerated solutions they pass successively through a minimum and a maximum before a steady state is achieved. By a suitable potentiometric analysis the results are explained. The most important factors found to be affecting the mechanism of corrosion process are presented. From the discovery of the mechanism and the factors affecting the Zn corrosion, predictions for promoting or slowing down the corrosion process may be derived.	en
heal.publisher	MCB UNIV PRESS LTD	en
heal.journalName	Anti-Corrosion Methods and Materials	en
dc.identifier.doi	10.1108/00035599810368517	en
dc.identifier.isi	ISI:000073487700003	en
dc.identifier.volume	45	en
dc.identifier.issue	2	en
dc.identifier.spage	84	en
dc.identifier.epage	94	en