Influence of Nb/V on the corrosion behavior of high-strength anti-seismic rebar in marine environments

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY npj Materials Degradation Pub Date : 2024-07-22 DOI:10.1038/s41529-024-00493-3

Zeyun Zeng, Shangjun Gu, Jie Wang, Fulong Wei, Zhiying Li, Hui Yang, Changrong Li

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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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Nb/V 对海洋环境中高强度抗震钢筋腐蚀行为的影响

本研究采用浸泡试验、表面分析、截面分析、定量分析和电化学分析等方法，研究了 Nb/V 对海洋环境中高强度抗震钢筋腐蚀行为的影响。腐蚀结果表明，添加 Nb/V 提高了螺纹钢的耐腐蚀性，从而降低了螺纹钢的腐蚀速率，提高了腐蚀层的稳定性。首先，Nb/V 的添加促进了钢筋表面腐蚀层中不稳定的铁氧氢氧化物向稳定的铁氧氢氧化物转化，从而提高了 α/（β + γ）比值、腐蚀电位和总阻抗值。其次，Nb/V 的加入诱导了钢筋表面腐蚀层中 Nb 氧化物和 V 氧化物的形成，这些氧化物的存在修复了腐蚀层的表面缺陷，从而提高了钢筋表面腐蚀层的耐腐蚀性能。

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来源期刊

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies