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http://dx.doi.org/10.14773/cst.2022.21.5.372

Relationship between the Cathodic Protection of Pipe Buried in Soil and Environmental Factors  

Choi, S.H. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
Won, S.Y. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
Yoo, Y.R. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
Kim, Y.S. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
Publication Information
Corrosion Science and Technology / v.21, no.5, 2022 , pp. 372-380 More about this Journal
Abstract
The external corrosion control of buried pipes can be achieved by a combination of coatings and cathodic protection to maximize effectiveness. One of the factors affecting cathodic protection is the environmental soil conditions. Because soil is a kind of electrolyte, the environmental conditions of soil may be changed by the atmospheric environment. Therefore, in this study, changes in environmental soil factors by atmospheric environmental factors were monitored. In cathodic protection, on-potential and off-potential were measured from December 2021 to July 2022. The effects of external environmental factors and soil environmental factors on cathodic protection were analyzed. Changes in outdoor temperature affected soil temperature, and soil conductivity had a proportional relationship with soil humidity, but outdoor humidity and precipitation did not significantly affect humidity and conductivity of the soil. In contrast, in cathodic protection, the on-potential was affected by temperature, humidity, the conductivity of the soil, and the anode used, but the off-potential was little affected by these factors.
Keywords
Buried pipe; Cathodic Protection; Temperature; Humidity; Conductivity;
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