...Detection of Stray Current on Guy Anchors Abstract Stray current refers to electric current that flows elsewhere rather than along its intended path. Stray current is a well-known factor in pipeline maintenance and has been discovered to be an important consideration in communication and electric...

...Stray current leakage and the corrosion caused by the leaked current in dc traction power systems has been an ongoing issue especially in slab/embedded tracks. These tracks typically run through urban traffic areas, city centers, tunnels, and between the utility lines. Their location requires...

... to be attributed to the oxidation of various components in soil such as sulfur or organic matter. Buried steel pipeline Cathodic Protection Stray current Protection potential criterion Instantaneous anodic current INTRODUCTION In some cases where the IR-free probe was utilized, instantaneous anodic current...

... but is normally either platinised-titanium (Pt-Ti) or mixed metal oxide coated titanium (MMO-Ti) bar. The current between the steel (anode) and passive (cathode) is measured using a zero resistance ammeter (ZRA). Abstract A condition monitoring system for corrosion and stray current monitoring is being supplied...

... (potential for galvanic corrosion), contain multiple tight-fitting components (potential for crevice corrosion), and are uncoated (potential for atmospheric corrosion). Thus, the environment has the potential to promote stray current corrosion and rapid corrosion of metal components. Stray current corrosion...

... density is 10 A/m² which corresponds for steel to a corrosion rate of about 10 mm/y. Non-stationary interference takes place when the electric field is variable, as in the typical case of stray currents dispersed by DC traction systems. Interference occurs only during the transit of the train...

... the effectiveness of combined CIPS and DCVG surveys for improved data correlation. close interval surveys CIS close interval potential surveys CIPS direct current voltage gradient DCVG combined CIPS and DCVG surveys CIPS DCVG spatial error external corrosion direct assessment ECDA stray current telluric...

... rectifier control, placement of reference electrodes, placement of anodes, current requirements, and current distribution for stray current control. stray current electric rail light-rail automatically controlled rectifier cathodic protection CP coupons water mains Box Culvert A shunt was placed...

... and commissioning of CP system of electrically isolated new pipeline sections, with special emphasis on DC stray current interference due to existing anode ground beds and existing pipelines crossing/parallelism. Case studies are included, with discussions on results of interference testing, interference mitigation...

...Stray currents occur when an electrical component emits current into a system and some of the current returns through unintended paths or components. This can be via pipelines or other conductive materials. Stray currents from direct current systems may cause severe damage as a result of corrosion...

... sections. Maximum propulsion current to accelerate an 8-car train is on the order of 8,000 to 10,000 amperes. Beginning at the design stage and continuing for several years into operation, stray current control was considered an integral part of the transit system procedures. The fundamental approach...

...As can be seen in Table 2 , stray currents occur to some extent even on a very well isolated traction power distribution system. To monitor the amount of stray current produced by the system and aid in mitigating the effect of stray current on transit and third-party structures, some structural...

.... To get an accurate assessment of the effect of the HVDC stray currents, it was essential to record the current flow and pipe-to-soil potential of both the 18 inch and 24 inch lines. The current flow was recorded as a voltage across a length of the pipeline and the pipe-to-soil potential was recorded...

... for a particular structure and environmental conditions before its practical implementation. Crude answers to the optimal location and distribution of the anodes required to protect effectively a certain area, or the prediction of interference and stray currents can be readily obtained before committing costly...

... to a reduction in mortar strength. The relationship between resistivity and strength is complex and also involves moisture content. Concrete Corrosion Cracking Resistivity Stray Current INTRODUCTION Previous works ^{1 , 2} report on the development of an electrically resistive concrete mix...

... were also found to have lost protection. In this paper, analysis of field data revealed that all of the zinc anodes in the vicinity of the tanks were picking up stray current. A mitigation measure was proposed to remove the existing resistive bond between the two structures and install a few zinc...

... of optimum groundbed location. The equations also apply to any metallic structure in an electrolyte that can be affected by direct current flow. anodes to remote earth potentials cathodic protection design stray current direct current interference anodes area of influence INTRODUCTION The minimum...

... of the device itself and field application have arisen. This paper covers problems issued in initial stages, upgraded functions on newly developed automated systems, and its performance results. Cathodic protection buried pipeline real-time monitoring on-potential off-potential stray current synchronous...

...INTRODUCTION The Portland Water Bureau (PWB) requires 10-ft separation between insulated embedded electric rail and metallic waterlines. The requirement of a 10-ft separation is based on both risk assessment for stray current corrosion (Ref 1 ) and access needs for maintenance and operations (Ref...

...ECDA CIS DCVG stray current limitations resolution measurements Introduction In situations when the ECDA process has to be conducted in areas with AC and DC (static and dynamic) stray current activity, the stray currents (SC) will likely greatly affect any voltage or current-based...