Geary, M. and Breslin, Carmel B. (1997) The Influence of Dichromate and Rare Earth Metal Passivation Treatments on the Dissolution of Sn/Zn Coatings. Corrosion Science, 39 (8). pp. 1341-1350. ISSN 0010-938X

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Abstract

The electrochemical behaviour of an 80Sn20Zn electro-deposited alloy following passivation in a dichromate solution and a cerium-containing solution, was studied. It was found that both the dichromate and cerium passivation procedures lead to an increase in the corrosion protection afforded by the 80Sn20Zn electro-deposit. This was attributed to a reduction in the rate of the zinc dissolution reaction from the electro-deposit which in turn extended the cathodic protection periods of the deposit. Passivation of the electro-deposited alloy in the cerium-containing solution lead to the precipitation of cerium oxides/hydroxides in a non-uniform manner over the surface. This precipitated film of cerium had the appearance of a cracked-mud layer. Nevertheless, the additional corrosion protection afforded by the cerium passivation treatment was equivalent to that provided by the dichromate passivation treatment.

Item Type:	Article
Keywords:	A. 80Sn-20Zn alloy; B. cerium; C. dichromate; C. corrosion protection;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	7956
Identification Number:	https://doi.org/10.1016/S0010-938X(97)00024-3
Depositing User:	Dr. Carmel Breslin
Date Deposited:	22 Feb 2017 15:19
Journal or Publication Title:	Corrosion Science
Publisher:	Elsevier
Refereed:	Yes
URI:	http://www.sciencedirect.com
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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