Abstract
In this study, the immersion test, surface analysis, cross-section analysis, quantitative analysis and electrochemical analysis were used to study the influence of Nb/V on the corrosion behavior of high-strength anti-seismic rebar in marine environments. The corrosion results clarified that the addition of Nb/V improved the corrosion resistance of the rebar, thereby reducing the corrosion rate of the rebar and improving the stability of corrosion layers. Firstly, the addition of Nb/V promoted the transformation of unstable Fe oxyhydroxides to stable Fe oxyhydroxides in the surface corrosion layers of the rebar, thus increasing the α/(β + γ) ratio, corrosion potential and total impedance value. Secondly, the addition of Nb/V induced the formation of Nb oxides and V oxides in the surface corrosion layers of the rebar, and the existence of these oxides repaired the surface defects of corrosion layers, thus enhancing the corrosion resistance performance of surface corrosion layers of the rebar.
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