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Corrosion Behavior of 9 % Ni Steel for LNG Storage Tanks in 3.5 wt. % NaCl Solution
Qin, Ming1,2; Xu, Weichen1,3; Yang, Lihui1,3; Li, Yantao1,3
2018-07-01
Source PublicationINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN1452-3981
Volume13Issue:7Pages:6537-6549
Corresponding AuthorLi, Yantao(ytli@qdio.ac.cn)
AbstractThe corrosion behavior of 9 % Ni steel in a 3.5 wt. % NaCl solution was investigated by electrochemical techniques including open circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The principal components and morphology of 9 % Ni steel and the resulting corrosion layer are analysed by metallographic evaluation, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Raman spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results suggest that the anodic reaction is primarily the dissolution of the iron matrix and the cathodic process is mainly the reduction of oxygen. The corrosion resistance R-ct of 9 % Ni steel decreased with increasing immersion time and the corrosion layer did not provide protection. The outer section of the corrosion product consists mostly of lepidocrocite gamma-FeOOH, trace goethite alpha-FeOOH, and magnetite Fe3O4. The inner section is a nickel-rich layer, which is related to the alloying elements and reverted austenite. Moreover, the corrosion layer was found to accelerate the selective corrosion.
Keyword9 % Ni steel corrosion electrochemical tests reverted austenite nickel-rich layer
DOI10.20964/2018.07.24
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFB0903700] ; National Science Foundation of China[41276074]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000441819300029
PublisherESG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/159884
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorLi, Yantao
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Open Studio Marine Corros & Protect, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qin, Ming,Xu, Weichen,Yang, Lihui,et al. Corrosion Behavior of 9 % Ni Steel for LNG Storage Tanks in 3.5 wt. % NaCl Solution[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2018,13(7):6537-6549.
APA Qin, Ming,Xu, Weichen,Yang, Lihui,&Li, Yantao.(2018).Corrosion Behavior of 9 % Ni Steel for LNG Storage Tanks in 3.5 wt. % NaCl Solution.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,13(7),6537-6549.
MLA Qin, Ming,et al."Corrosion Behavior of 9 % Ni Steel for LNG Storage Tanks in 3.5 wt. % NaCl Solution".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 13.7(2018):6537-6549.
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