Electrochemical characterization of oxide film formed at high temperature on Alloy 690

被引：27

作者：

Abraham, Geogy J. ^{[1
]}

Bhambroo, Rajan ^{[2
]}

Kain, V. ^{[1
]}

Shekhar, R. ^{[3
]}

Dey, G. K. ^{[1
]}

Raja, V. S. ^{[2
]}

机构：

[1] BARC, Div Mat Sci, Bombay 400085, Maharashtra, India

[2] Indian Inst Technol, Deptt Met Engg & Mat Sci, Bombay 400076, Maharashtra, India

[3] BARC, CCCM, Hyderabad 500062, Andhra Pradesh, India

来源：

NUCLEAR ENGINEERING AND DESIGN | 2012年 / 243卷

关键词：

STAINLESS-STEEL; PRIMARY WATER; BASE ALLOYS; SURFACE; 316L; PH;

D O I：

10.1016/j.nucengdes.2011.11.018

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

High temperature passivation studies on Alloy 690 were carried out in lithiated water at 250 degrees C, 275 degrees C and 300 degrees C for 72 h. The passive films were characterized by glow discharge-quadrupole mass spectroscopy (GD-QMS) for compositional variation across the depth and micro laser Raman spectroscopy for oxide composition on the surface. The defect density in the oxide films was established from the Mott-Schottky analysis using electrochemical impedance spectroscopy. Electrochemical experiments at room temperature in chloride medium revealed best passivity behaviour by the oxide film formed at 300 degrees C for 72 h. The electrochemical studies were correlated to the chromium (and oxygen) content of the oxide films. Autoclaving at 300 degrees C resulted in the best passive film formation on Alloy 690 in lithiated water. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：69 / 75

页数：7

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