Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 288, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.123101
Keywords
Compound nitrite with D-sodium gluconate; Simulated concrete pore solution; Carbon steel; Corrosion inhibition efficiency; Molecular dynamics simulation
Categories
Funding
- National Natural Science Foundation of China [U1706222]
- key research and development program of Shandong Province [2019GSF110006]
- Mount Taishan Scholar of Shandong Province [TS20190942]
- State Key Laboratory of High Performance Civil Engineering Materials [2019CEM006]
- First -class Discipline Project - Education Department of Shandong Province
- 111 program
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The inhibitory performance and mechanism of compound nitrite with D-sodium gluconate on carbon steel in simulated concrete pore solution were studied. The results showed effective hindrance of pitting corrosion by the corrosion inhibitor, enhanced stability of the passive film on carbon steel, and competition with chloride ions for adsorption, weakening the adsorption of chloride ions on the steel surface.
The inhibitory performance and mechanism of compound nitrite with D-sodium gluconate on carbon steel in simulated concrete pore solution was studied. Results of EIS, SEM and AFM indicate that the pitting corrosion of the steel was effective hindered by corrosion inhibitor in the pore solution. XPS results shows that the stability of the passive film on carbon steel was enhanced by corrosion inhibitor, which explained the adsorption and inhibition behavior of composite nitrite. Molecular dynamics simulation results show that D-sg competed with chloride ions for adsorption and effectively weakened the adsorption of chloride ions on the surface of carbon steel.& nbsp; (c) 2021 Elsevier Ltd. All rights reserved.
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