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Comparison of soil properties measurements in pipeline corrosion estimation

Marušić, Katarina; Kekez, Krešimir; Martinez, Sanja (2019) Comparison of soil properties measurements in pipeline corrosion estimation. Materials and Corrosion / Werkstoffe und Korrosion . ISSN 0947-5117

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Soil corrosion is a hazardous electrochemical process that affects buried metals in contact with soil. Corrosion in soils resembles atmospheric corrosion with corrosion rates usually higher and depending on the soil type. There are numerous properties of soil and thus soils can be classified in many different ways. Soil resistivity is one of the main indicators of soil corrosivity and thus of the hazardous impact the soil has on metal materials in soil environment, although it is not the only parameter affecting the risk of corrosion damage. In this work on-site measurements and laboratory measurements of soil characteristics are performed and compared. On- site measurements include measuring the redox potential and soil resistivity by Wenner 4-pin method, while the measurements in laboratory include measuring soil conductivity, as well as moisture content, pH, content of sulphates, chlorides and sulfides and polarization measurements, which give the most accurate results. The measurements have shown that if the Wenner 4- pin method is performed in a convenient way the obtained results are not precise but can give an indicative picture of the corrosivity of the observed soil.

Item Type: Article
Uncontrolled Keywords: Soil resistivity; Soil corrosivity; Wenner 4-pin method; Polarization method
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Chemistry > Applied Chemistry
Divisions: Division of Materials Chemistry
Depositing User: Katarina Marušić
Date Deposited: 02 Jul 2019 09:52
DOI: 10.1002/maco.201810768

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