ELECTROCHEMICAL IMPEDANCE STUDIES OF HOT CORROSION OF PREOXIDIZED NI BY A THIN-FUSED NA2SO4 FILM

被引：32
作者：
WU, YM [1 ]
RAPP, RA [1 ]
机构：
[1] OHIO STATE UNIV,DEPT MAT SCI & ENGN,COLUMBUS,OH 43210
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1991年 / 138卷 / 09期
关键词：
D O I：
10.1149/1.2086037
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A thin-film electrochemical arrangement has been developed to investigate the hot corrosion of preoxidized Ni by a fused Na2SO4 film at 1200 K in a catalyzed 0.1% SO2-O2 gas mixture. A Pt counterelectrode enables polarization measurements using the three-electrode configuration as well as open-circuit potentiometry. To extract mechanistic information without disturbing the system, the electrochemical impedance technique was used. Results of three distinct modes of hot corrosion (passive, pseudo-passive, and active) resulting from different preoxidation conditions are discussed.
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页码：2683 / 2690
页数：8
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