Comparison of soil properties measurements in pipeline corrosion estimation. Issue 9 (12th April 2019)

• Record Type: Journal Article
• Authors: Marušić, Katarina; Kekez, Krešimir; Martinez, Sanja
• Is Part Of: Materials and corrosion. Volume 70:Issue 9(2019)
• Page Start: 1700
• Page End: 1707
• Publication Date: 2019-04-12
• Subjects: polarization method -- soil corrosivity -- soil resistivity -- Wenner 4‐pin method; Materials -- Periodicals; Metals -- Periodicals; Corrosion and anti-corrosives -- Periodicals; 620.1122305
• DOI: 10.1002/maco.201810768
• Languages: English
• ISSNs: 0947-5117

Abstract

Abstract: 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 the soil environment, although it is not the only parameter affecting the risk of corrosion damage. In this study 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 the 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. Abstract : Different soil properties were measured on soils from four different locations to determine which properties can give an insight on the corrosivity of soil and to see if it is possible to determine by measurements on‐site the degree of soil's corrosivity. The results have shown that if the on‐site Wenner 4‐pin method is used in the proper way it is possible to get a picture of the corrosivity of soil, although the results are not precise.