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Electrochemical impedance study of the corrosion of Fe-Cr alloys in molten (Li,K)(2)CO3 eutectic mixture
Zeng, CL; Wang, W; Niu, Y; Wu, WT
Corresponding AuthorZeng, CL()
2001
Source PublicationHIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2
ISSN0255-5476
Volume369-3Pages:809-816
AbstractElectrochemical impedance spectroscopy (EIS) together with thermogravimetric techniques were employed to study the corrosion of iron and Fe-Cr alloys containing 5, 10, 20 and 25 wt.% Cr respectively in a molten eutectic (Li,K)(2)CO3 mixture at 650 degreesC. The Nyquist plots for the corrosion of iron and Fe-Cr alloys in the melt are similar, and are all composed of a small semicircle at high frequency and a large semicircle at low frequency. The radius of the semicircle at low frequency, which can be used to evaluate the corrosion resistance of the alloys, is significantly larger for Fe-20Cr and Fe-25Cr than for Fe, Fe-5Cr and Fe-10Cr. The Cr-rich alloys undergo slower corrosion than iron and the Cr-poor alloys: this is further confirmed by the thermogravimetric results and is due to the formation of Cr-rich scales. An equivalent circuit of oxide capacitance in series with the double-layer capacitance was proposed to describe the impedance spectra.
Keyword(Li,K)(2)CO3 corrosion electrochemical impedance Fe-Cr alloys
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics ; Materials Science, Multidisciplinary ; Materials Science, Coatings & Films
WOS IDWOS:000172513200094
PublisherTRANS TECH PUBLICATIONS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/113320
Collection中国科学院金属研究所
Corresponding AuthorZeng, CL
AffiliationChinese Acad Sci, Inst Corros & Protect Met, State Key Lab Corros & Protect, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Zeng, CL,Wang, W,Niu, Y,et al. Electrochemical impedance study of the corrosion of Fe-Cr alloys in molten (Li,K)(2)CO3 eutectic mixture[J]. HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2,2001,369-3:809-816.
APA Zeng, CL,Wang, W,Niu, Y,&Wu, WT.(2001).Electrochemical impedance study of the corrosion of Fe-Cr alloys in molten (Li,K)(2)CO3 eutectic mixture.HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2,369-3,809-816.
MLA Zeng, CL,et al."Electrochemical impedance study of the corrosion of Fe-Cr alloys in molten (Li,K)(2)CO3 eutectic mixture".HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2 369-3(2001):809-816.
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