RETRACTED: Chemical composition and electronic structure of passive films formed on Alloy 600 in acidic solution (Retracted Article)

被引：22

作者：

Ries, L. A. S. ^{[1
]}

Belo, M. Da Cunha ^{[2
]}

Ferreira, M. G. S. ^{[2
,3
]}

Muller, I. L. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Dept Met, BR-91501970 Porto Alegre, RS, Brazil

[2] Inst Super Tecn, Dept Chem Engn, P-1049001 Lisbon, Portugal

[3] Univ Aveiro, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 04期

关键词：

Alloy; 600; passive films; chemical composition; electronic structure;

D O I：

10.1016/j.corsci.2007.11.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The chemical composition and the semiconducting properties of passive films formed on nickel-based alloy (Alloy 600) in acidic sulphate solution, pH 2.0 at room temperature were studied using Auger analysis, voltammetric techniques and the Mott-Schottky approach. The results obtained revealed that the presence of both chromium and mixed nickel-iron oxides in the films leads to the development of a p-n heterojunction, which controls their electronic structure, similarly manner to the case of stainless steels and Alloy 600 in borate buffer solution. This behavior has been interpreted as representing of an oxide system, which has a duplex character, with an inner p-type semiconducting region, mainly formed by chromium oxide and an outer n-type semiconducting region, containing iron oxide. It could also be observed that the nickel oxide present in the films acts as a barrier layer conferring improved protection. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：968 / 977

页数：10

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