Abstract
Stray current induced corrosion is a major technical challenge for modern electrified railway systems. It can lead to corrosive damage to railway tunnel segmental linings and surrounding infrastructure. Steel fibre reinforced concrete (SFRC) represents a potential solution to this problem due to the possible lack of electrical continuity between steel fibres. Despite this potential advantage, there is still lack of knowledge concerning the susceptibility of SFRC to stray current induced corrosion. Instrumental methods for electrochemistry and computer simulations were conducted in this project to evaluate the corrosion susceptibility of SFRC under a simulated stray direct current (DC) condition. Results indicate that steel fibres have high inherent corrosion resistance to the stray DC interference under a chloride-free condition. The presence of a small amount of NaCl however can lead to enhanced stray DC-induced corrosion.
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