Research Progress of Nitrite Corrosion Inhibitor in Concrete

Nitrite inhibitor is a kind of most effective inhibitory corrosion additive used in reinforced concrete. This paper expounded the inhibiting mechanism and physical property of nitrite in concrete. Moreover, the recent progress and application condition at home and abroad were summarized. Meanwhile,...

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Bibliographic Details
Published inInternational Journal of Corrosion Vol. 2019; no. 2019; pp. 1 - 9
Main Authors Shu, Haibin, Wang, Hui, Liu, Junzhe, Song, Yilin
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 2019
Hindawi
John Wiley & Sons, Inc
Hindawi Limited
Subjects
Additives
Carbon steel
Cathodes
Cement
Chloride
Concrete
Construction
Corrosion
Corrosion inhibitors
Corrosion mechanisms
Corrosion prevention
Corrosion tests
Inhibitors
Ion concentration
Morphology
Nitrites
Nitrogen dioxide
Physical properties
Ratios
Reinforced concrete
Reinforcing steels
Steel
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Summary:Nitrite inhibitor is a kind of most effective inhibitory corrosion additive used in reinforced concrete. This paper expounded the inhibiting mechanism and physical property of nitrite in concrete. Moreover, the recent progress and application condition at home and abroad were summarized. Meanwhile, corresponding methods for detecting nitrite ion concentration is proposed. Additionally, the inhibition practice on corrosion protection of reinforcing bar in concrete was presented. The long-term inhibiting effectiveness of nitrite ion in concrete when the n(NO2-)/n(Cl-) ratios were above the threshold values in concrete was obtained. Finally it is confirmed that critical molar ratio of n(NO2-)/n(Cl-) increased with differential nitrite ion concentration, higher cathode, and anode area ratio in steel bar.
ISSN:1687-9325
1687-9333
DOI:10.1155/2019/3060869