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Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO2-saturated solutions and its synergism with thiourea
Okafor, P. C.1,2; Liu, C. B.1; Liu, X.1; Zheng, Y. G.1; Wang, F.3; Liu, C. Y.3; Wang, F.3
Corresponding AuthorZheng, Y. G.(ygzheng@imr.ac.cn)
2010-08-01
Source PublicationJOURNAL OF SOLID STATE ELECTROCHEMISTRY
ISSN1432-8488
Volume14Issue:8Pages:1367-1376
AbstractThe inhibition and adsorption behavior of 2-undecyl-1-sodium ethanoate-imidazoline salt (2M2) and thiourea (TU) on N80 mild steel in CO2-saturated 3 wt.% NaCl solutions was studied at 25 A degrees C, pH 4, and 1 bar CO2 partial pressure using electrochemical methods. It was found that inhibition efficiency (eta%) increased with increase in 2M2 concentration but decreased with increase in TU concentration with optimum eta% value at 20 mg l(-1) TU. The data suggest that the compounds functioned via a mixed-inhibitor mechanism. The inhibition process is attributed to the formation of an adsorbed film of 2M2 and TU via the inhibitors polycentric adsorption sites on the metal surface which protects the metal against corrosion. A synergistic effect was observed between TU and 2M2. Potential of unpolarizability, E (u), was observed in the presence of 100 mg l(-1) TU which was shifted positively in the presence of 2M2-100 mg l(-1) TU blends, which suggests that the presence of 2M2 stabilized the adsorption of TU molecules on the surface of the metal. The adsorption characteristics of 2M2 were approximated by Langmuir adsorption isotherm.
KeywordAdsorption CO2 corrosion Imidazoline Mild steel Synergism Thiourea
Funding OrganizationChinese Academy of Sciences (CAS) ; Academy of Sciences for the Developing World ; Major State Basic Research ; PetroChina
DOI10.1007/s10008-009-0963-6
Indexed BySCI
Language英语
Funding ProjectChinese Academy of Sciences (CAS) ; Academy of Sciences for the Developing World ; Major State Basic Research[2006CB705800] ; PetroChina[07-02Z-01]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000277939800004
PublisherSPRINGER
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/99718
Collection中国科学院金属研究所
Corresponding AuthorZheng, Y. G.
Affiliation1.CAS, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Liaoning Prov, Peoples R China
2.Univ Calabar, Dept Pure & Appl Chem, Calabar 1115, Nigeria
3.Jilin Oilfield Corp PetroChina, Songyuan 138000, Jilin Province, Peoples R China
Recommended Citation
GB/T 7714
Okafor, P. C.,Liu, C. B.,Liu, X.,et al. Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO2-saturated solutions and its synergism with thiourea[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2010,14(8):1367-1376.
APA Okafor, P. C..,Liu, C. B..,Liu, X..,Zheng, Y. G..,Wang, F..,...&Wang, F..(2010).Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO2-saturated solutions and its synergism with thiourea.JOURNAL OF SOLID STATE ELECTROCHEMISTRY,14(8),1367-1376.
MLA Okafor, P. C.,et al."Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO2-saturated solutions and its synergism with thiourea".JOURNAL OF SOLID STATE ELECTROCHEMISTRY 14.8(2010):1367-1376.
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