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Corrosion behavior of steel fiber reinforced concrete under ambipolar stray current interference
https://orcid.org/0000-0001-9774-1806
Abstract 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.
Highlights A self-designed SC simulation system is employed. The synergistic effect of stray current and chloride ion significantly enhances the corrosion damage of SFRC. The mechanism of enhanced corrosion of SFRC caused by critical chloride ions is explained. The discrete steel fibers can participate in circuit loop under intense SC interference (high potential gradients).
Corrosion behavior of steel fiber reinforced concrete under ambipolar stray current interference
https://orcid.org/0000-0001-9774-1806
Abstract 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.
Highlights A self-designed SC simulation system is employed. The synergistic effect of stray current and chloride ion significantly enhances the corrosion damage of SFRC. The mechanism of enhanced corrosion of SFRC caused by critical chloride ions is explained. The discrete steel fibers can participate in circuit loop under intense SC interference (high potential gradients).
Corrosion behavior of steel fiber reinforced concrete under ambipolar stray current interference
https://orcid.org/0000-0001-9774-1806
Abstract 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.
Highlights A self-designed SC simulation system is employed. The synergistic effect of stray current and chloride ion significantly enhances the corrosion damage of SFRC. The mechanism of enhanced corrosion of SFRC caused by critical chloride ions is explained. The discrete steel fibers can participate in circuit loop under intense SC interference (high potential gradients).
Corrosion behavior of steel fiber reinforced concrete under ambipolar stray current interference
Liu, Hu (author) / Li, Kaibin (author) / Li, Yongqiang (author) / Liu, Suyun (author) / Dong, Zhijun (author) / Cui, Hongzhi (author) / Liu, Wei (author)
2023-11-21
Article (Journal)
Electronic Resource
English
Stray current induced corrosion of steel fibre reinforced concrete
| Elsevier | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017
Stray current induced corrosion of steel fibre reinforced concrete
| British Library Online Contents | 2017