Stray current corrosion activity on rail transit system in urban areas

Abstract

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Influence of Stray Current on Fastening System Components in Urban Railway Tracks

“…If it occurs in the places where the rail is fastened to the concrete base using a discrete fastening system, the corrosion combined with the traffic load may lead to breakage of the rail foot and the elements of the fastening Compared to the mass of the rail and the metal parts of the fastening system, stray current corrosion does not cause a significant loss of material on the track, but the deterioration caused by stray current is localized. If it occurs in the places where the rail is fastened to the concrete base using a discrete fastening system, the corrosion combined with the traffic load may lead to breakage of the rail foot and the elements of the fastening system [51]. In this case, the rail is no longer fastened to the base, and traffic safety may be compromised.…”

Laser-Induced Ultrasonic Guided Waves Based Corrosion Diagnosis of Rail Foot

“…As shown in Fig. 1, the corrosion usually initiates at the bottom of rail foot edges where causative stray current flows into the contacting rail clip and tie plate [1], [2]. As a result, it is hardly accessible to popular inspection systems based on ultrasonic wheel probe or visual camera [3], [4].…”

Finding Percentage of Breakdown Stimulation of Aluminum Wires That Operates in a Corrosive Medium

“…These cavities serve as a source for stresses and cracks, and they are advanced, which in the presence of stray currents, the excretion of metal ions will result in more and larger cavities and cracks, because the metal is more anodic and energetic than it is used to be. Its energy is greater, it is essential to unleash metal ions to achieve stability, and this process of tensile stress and increased chemical corrosion continues with stray currents, until the metal collapses, particularly at high temperatures [9][10] [11].…”