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A platform for research: civil engineering, architecture and urbanism
Effects of non-stationary stray current on carbon steel buried pipelines under cathodic protection
Highlights The alkalinity produced during CP reduces the DC interference effect. Anodic reaction initially causes the neutralization of electrolyte alkalinity. The anodic potential shift is higher than what expected by Tafel law. Potential peak cannot be used as parameter to evaluate the risk of DC interference. DC peak intensity and duration are the key parameters.
Abstract DC stray currents may cause severe corrosion on buried carbon steel pipelines even if in cathodic protection. According to international standard anodic interference is unacceptable if the IR-free potential is more positive than the protection potential (−0.85 V CSE). But, duration and magnitude of the anodic peak is not defined. The criterion appears to be too restrictive if short periods of anodic interference are established. This paper deals with the study of the effects of anodic interference on carbon steel in cathodic protection in soil-simulating environment in the presence of DC interference at varying peak current density and duration.
Effects of non-stationary stray current on carbon steel buried pipelines under cathodic protection
Highlights The alkalinity produced during CP reduces the DC interference effect. Anodic reaction initially causes the neutralization of electrolyte alkalinity. The anodic potential shift is higher than what expected by Tafel law. Potential peak cannot be used as parameter to evaluate the risk of DC interference. DC peak intensity and duration are the key parameters.
Abstract DC stray currents may cause severe corrosion on buried carbon steel pipelines even if in cathodic protection. According to international standard anodic interference is unacceptable if the IR-free potential is more positive than the protection potential (−0.85 V CSE). But, duration and magnitude of the anodic peak is not defined. The criterion appears to be too restrictive if short periods of anodic interference are established. This paper deals with the study of the effects of anodic interference on carbon steel in cathodic protection in soil-simulating environment in the presence of DC interference at varying peak current density and duration.
Effects of non-stationary stray current on carbon steel buried pipelines under cathodic protection
Ormellese, Marco (author) / Beretta, Silvia (author) / Brugnetti, Fabio (author) / Brenna, Andrea (author)
2021-02-08
Article (Journal)
Electronic Resource
English
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