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Effect of flow velocity and entrained sand on inhibition performances of two inhibitors for CO2 corrosion of N80 steel in 3% NaCl solution
Jiang, X; Zheng, YG; Ke, W
Corresponding AuthorZheng, YG()
2005-11-01
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume47Issue:11Pages:2636-2658
AbstractInhibition for CO2 corrosion of N80 steel by quaternary alkynoxymethyl amine (IMC-80-Q) and imidazoline in 3% NaCl solution was investigated under static and flowing conditions by using modified rotating disk apparatus. The effects of flow velocity, concentration of inhibitor as well as entrained sand on inhibition performances were studied through weight loss test, scanning electron microscope (SEM) observation and electrochemical techniques including electrochemical impedance spectroscopy (EIS), linear polarization resistance. Electrochemical parameters such as R-1 and C-d for IMC-80-Q exhibited peak-value-phenomenon at inhibitor concentration of 150 mg/L when flow rate was below 5 m/s, in contrast with 300 mg/L when flow rate was beyond 5 m/s. The optimum concentration was further enhanced by the entrained sand in the medium containing IMC-80-Q. The adsorption of IMC-80-Q under static condition obeyed Langmuir isotherm when inhibitor concentration was below 150 mg/L, but it changed into Freundlich isotherm as inhibitor concentration was beyond 150 mg/L. The optimum inhibitor concentration of imidazoline under static condition was 100 mg/L, but it increased to 200 mg/L at 5 m/s. Under static condition imidazoline exhibited better inhibition than IMC-80-Q did; in contrast, at 5 m/s IMC-80-Q exhibited better inhibition than imidazoline did. The critical flow velocity was a function of both inhibitor type (IMC-80-Q or imidazoline) and inhibitor concentration. (c) 2005 Elsevier Ltd. All rights reserved.
DOI10.1016/j.corsci.2004.11.012
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000232735800003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82491
Corresponding AuthorZheng, YG
AffiliationChinese Acad Sci, Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Jiang, X,Zheng, YG,Ke, W. Effect of flow velocity and entrained sand on inhibition performances of two inhibitors for CO2 corrosion of N80 steel in 3% NaCl solution[J]. CORROSION SCIENCE,2005,47(11):2636-2658.
APA Jiang, X,Zheng, YG,&Ke, W.(2005).Effect of flow velocity and entrained sand on inhibition performances of two inhibitors for CO2 corrosion of N80 steel in 3% NaCl solution.CORROSION SCIENCE,47(11),2636-2658.
MLA Jiang, X,et al."Effect of flow velocity and entrained sand on inhibition performances of two inhibitors for CO2 corrosion of N80 steel in 3% NaCl solution".CORROSION SCIENCE 47.11(2005):2636-2658.
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