INSITU AC IMPEDANCE STUDIES OF OXIDE FILM GROWTH ON ZIRCALOY-4 IN HIGH-TEMPERATURE HIGH-PRESSURE STEAM

被引：9

作者：

DURANDKEKLIKIAN, L ^{[1
]}

CRAGNOLINO, G ^{[1
]}

MACDONALD, DD ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT MET ENGN,FONTANA CORROS CTR,COLUMBUS,OH 43210

来源：

CORROSION SCIENCE | 1991年 / 32卷 / 03期

关键词：

ACCELERATED CORROSION;

D O I：

10.1016/0010-938X(91)90080-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In situ a.c. impedance measurements have been carried out to study the electrical properties of the oxide films formed on as-received Zircaloy-4 exposed to steam at 500-degrees-C and 650 psi. A two-electrode configuration, in which Zircaloy-4 and a spring loaded graphite are the electrodes, is used for studying interfacial impedance as a function of frequency in steam. The Nyquist plots show that the impedance spectrum of a shiny black zirconium oxide surface was represented by a high frequency semicircle as expected for charge transfer through a resistive film. The development of unreliable in situ measurements may be an indication of the onset of nodule formation.

引用

页码：361 / 365

页数：5

共 4 条

[1]

DURANDKEKLIKIAN L, 1991, CORROS SCI, V32, P347, DOI 10.1016/0010-938X(91)90079-5

[2]

Johnson A.B., 1977, ASTM STP, V633, P295

[3] MECHANISM FOR EFFECT OF HEAT-TREATMENT ON ACCELERATED CORROSION OF ZIRCALOY-4 IN HIGH-TEMPERATURE, HIGH-PRESSURE STEAM [J].

URQUHART, AW ;

VERMILYEA, DA ;

ROCCO, WA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (02) :199-204

[4] PRELIMINARY CORRELATION BETWEEN ACCELERATED CORROSION OF ZIRCALOY IN BWRS AND IN HIGH-TEMPERATURE, HIGH-PRESSURE STEAM [J].

URQUHART, AW ;

VERMILYEA, DA .

JOURNAL OF NUCLEAR MATERIALS, 1976, 62 (01) :111-114

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