Corrosion behavior of steel fiber reinforced concrete under ambipolar stray current interference

被引：6

作者：

Liu, Hu ^{[1
,2
]}

Li, Kaibin ^{[1
]}

Li, Yongqiang ^{[2
]}

Liu, Suyun ^{[2
]}

Cui, Hongzhi ^{[1
]}

Liu, Wei ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Civil & Transportat Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China

[2] Shenzhen Inst Informat Technol, Inst Technol Marine Civil Engn, Shenzhen 518172, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 411卷

基金：

中国国家自然科学基金;

关键词：

Stray current; Steel fiber reinforced concrete; Electrochemical test; Passive film; LOW-CARBON STEEL; DISSOLVED-OXYGEN; IRON-OXIDE; CHLORIDE; DC; SPECTROSCOPY; SPECTRA; SYSTEM; BARS; FILM;

D O I：

10.1016/j.conbuildmat.2023.134302

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper preliminarily discussed the influence of measured stray current (SC) with ambipolar characteristics on the corrosion behavior of steel fiber in simulated pore solution and concrete environment by means of corrosion morphology observation, weight loss experiment, electrochemical test, etc. In simulated solution, the results indicated that the influence of short-term SC on steel fiber was limited, while the addition of Cl- led to the weakening or even disappearance of the self-repairing ability of passivation film and accelerated the occurrence of pitting corrosion on the surface of steel fiber. For steel fiber reinforced concrete (SFRC) samples, the circuit loop was formed through the discrete steel fiber, and its resistance depended on the steel fiber content. Although the concrete provided finite protection, the SFRC suffered from severe corrosion under the combined effect of intense SC and Cl-, and the preferential corrosion site was the end of steel fiber.

引用

页数：10

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