Oxidation mechanism of an Fe-9Cr-1Mo steel by liquid Pb-Bi eutectic alloy at 470 °C (Part II)

被引：196

作者：

Martinelli, L. ^{[1
]}

Balbaud-Celerier, F. ^{[1
]}

Terlain, A. ^{[1
]}

Bosonnet, S. ^{[1
]}

Picard, G. ^{[2
]}

Santarini, G. ^{[3
]}

机构：

[1] CEA, DEN, Serv Corros & Comportement Mat Leur Environm, F-91191 Gif Sur Yvette, France

[2] Ecole Natl Super Chim Paris, CNRS, UMR 7575, Lab Electrochim & Chim Analyt, F-75231 Paris, France

[3] CEA, F-91191 Gif Sur Yvette, France

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 09期

关键词：

Magnetite; Available space model; Duplex oxide scale; Oxidation mechanism;

D O I：

10.1016/j.corsci.2008.06.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper is the second part of a global study on the oxidation process of an Fe-9Cr-1Mo martensitic steel (T91) in static liquid Pb-Bi. It focuses on the growth mechanism of a duplex oxide scale. The oxide layer has a duplex structure composed of an internal Fe-Cr spinel layer and an external magnetite layer. The magnetite layer grows by iron diffusion until Pb-Bi/oxide interface whereas the Fe-Cr spinel layer grows, at the metal/oxide interface, inside the space kept "available" by the iron vacancies accumulation due to iron outwards diffusion for magnetite formation. This growth mechanism is close to the "available space model". However, this model is completed by an auto-regulation Process based on oxygen supply. (c) 2008 Elsevier Ltd All rights reserved.

引用

页码：2537 / 2548

页数：12

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