Abstract
To enhance corrosion resistance in reinforced concrete exposed to chloride environments, a γ-aminopropyltriethoxysilane (KH550) solution was used to treat the steel bar surface. This study investigated the corrosion resistance and microscopic mechanism of self-assembled silane film-modified steel bars. Surface morphology, elemental composition, and functional group changes were analyzed using SEM, EDS, and FTIR before and after solution treatment to determine the optimal treatment concentration. X-ray computed tomography (X-ray CT) was employed to analyze rust evolution and fracture characteristics in steel bars treated with silane coupling agent self-assembly technology. Results revealed that the self-assembly of molecules significantly enhanced corrosion resistance when using a water to ethanol to KH550 solution volume ratio of 50:3:10. The corrosion resistance mechanism of silane self-assembled steel bars against chloride salt corrosion was verified through X-ray CT technology, quantifying the volume expansion rate of rust products.
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