Numeric method of IR elimination from measurement results of potential of underground pipelines in the zone of interaction of stray currents

Investigation on corrosion rate and a novel corrosion criterion for gas pipelines affected by dynamic stray current

“…Potential measurements are carried out using a voltmeter with high internal resistance and a reference electrode (e.g. copper/copper sulfate electrode (CSE)) placed on the ground on the top of the buried structure (Zakowski and Darowicki, 2000;Glazov and Shamshetdinov, 2002;Freiman, 2004;Zakowski and Sokolski, 1999).…”

Stray current‐induced corrosion in cathodic protection installations of steel‐reinforced concrete structures: FEM study of the critical parameters

“…Stray current corrosion induced by electrochemical rehabilitation measures is another topic that is more honoured in the breach than in the observance. Although several papers [ 2–9 ] and even standards [ 10 ] are available concerning the general topic of stray current corrosion induced by DC systems, the DC source is normally not a part of the concrete structure. Thus, the highly conductive current path through the reinforcement is surrounded by low conductive concrete, which has, in this case, shielding properties.…”

Predictive model for corrosion hazard of buried metallic structure caused by stray current in the subway

“…Taking buried pipelines near the subway as an example, the corrosion hazard monitoring system is shown in Figure 2. The reference electrode is often used to monitor the pipe-to-soil potential, which is placed above the buried pipelines to reduce the interference of the IR drop ( _ Zakowski and Sok olski, 1999;Li et al, 2007).…”

“…For dynamic stray current interference, both frequently instantaneous large potential shift and accumulation of small extent positive potential shift will cause corrosion (Chen et al, 2013;Lucca, 2015). This can be explained by the rapid variation relevant to the current absorbed by locomotives because of different vehicle running mode, and by the likewise rapid variation of their position, which leads to the random changes of anode zone and cathode zone on the buried metallic structure (Xu et al, 2013;_ Zakowski and Sok olski, 1999;Chen et al, 2011). The positive potential shift is usually used in determining the corrosion hazard of buried metallic structure in the existing standard (Mo et al, 2013).…”