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The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 degrees C
Y. B. Tang; L. Liu; L. Fan; Y. Li; F. H. Wang
2014
Source PublicationMaterials
ISSN1996-1944
Volume7Issue:9Pages:6144-6157
AbstractThe corrosion behavior of pure Fe under a Na2SO4 deposit in an atmosphere of O-2 + H2O was investigated at 500 degrees C by thermo gravimetric, and electrochemical measurements, viz. potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and surface characterization methods viz. X-ray diffraction (XRD), and scanning electron microscope (SEM)/energy dispersive spectroscopy(EDS). The results showed that a synergistic effect occurred between Na2SO4 and O-2 + H2O, which significantly accelerated the corrosion rate of the pure Fe. Briefly, NaFeO2 was formed in addition to the customary Fe oxides; at the same time, H2SO4 gas was produced by introduction of water vapor. Subsequently, an electrochemical corrosion reaction occurred due to the existence of Na2SO4, NaFeO2, and H2O. When this coupled to the chemical corrosion reaction, the progress of the chemical corrosion reaction was promoted and eventually resulted in the acceleration of the corrosion of the pure Fe.
description.department[tang, yanbing ; liu, li ; fan, lei ; li, ying ; wang, fuhui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china. [tang, yanbing] cccc fourth harbor engn inst co ltd, minist commun, key lab durabil technol harbor & marine struct, guangzhou 510230, guangdong, peoples r china. ; liu, l (reprint author), chinese acad sci, inst met res, wencui rd 62, shenyang 110016, liaoning, peoples r china. ; tyanbing@gzpcc.com ; liliu@imr.ac.cn ; lfan10s@imr.ac.cn ; liying@imr.ac.cn ; fhwang@imr.ac.cn
KeywordElectrochemical Reaction Na2so4 + O-2 + H2o Corrosion Behavior Plus Water-vapor Nacl Deposit Hot Corrosion Oxidation Alloys Sodium 500-700-degrees-c 600-degrees-c Sulfidation Nickel
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73387
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Y. B. Tang,L. Liu,L. Fan,et al. The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 degrees C[J]. Materials,2014,7(9):6144-6157.
APA Y. B. Tang,L. Liu,L. Fan,Y. Li,&F. H. Wang.(2014).The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 degrees C.Materials,7(9),6144-6157.
MLA Y. B. Tang,et al."The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 degrees C".Materials 7.9(2014):6144-6157.
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