A Novel Approach for Proximate Analysis of Soil Corrosion Condition in Imadol-Sanagaun and Kantipur Colony Areas of Nepal

Abstract:

The catastrophe failures of the underground water pipelines, made by Fe-alloys have been largely reported in Nepal, mostly due to the unwanted electrochemical interactions in the interfacial regions between the aggressive soils and external pipe surfaces. To cope with such pipe corrosion, this study was put forward a novel probabilistic approach for the proximate analysis of the corrosive grade of soils to the pipes with the improvement of the previously practiced ASTM, AWWA, and NACE classifying methods. In this non-deterministic approach, four corrosive groups were firstly classified based on the quantitative data of 6 soil properties, which were further classified into ten sub-corrosion groups by considering the sum of the cumulative point of each soil sample. The proximate soil analysis of twenty-four samples of the Sanagaun-Imadol (SNG-IDL) and Kantipur (KNT) housing areas of Lalitpur metropolitan (Kathmandu Valley) was performed to evaluate their corrosion conditions and to draw a corrosive soil mapping. The results of such proximate analysis under the probabilistic approach disclosed that ~ 92% of the total 24 soils of the study areas belonged to five specific sub-corrosion groups, which are considered the members of two corrosion groups, i.e., less and mildly corrosion groups.

• Periodical: Solid State Phenomena (Volume 338)
• Pages: 17-27
• DOI: https://doi.org/10.4028/p-u7uv9u
• Online since: October 2022
• Authors: Kumar Prasad Dahal, Shrawan Kumar Regmi, Jagadeesh Bhattarai*
• Keywords: Corrosivity, Galvanized-Steel, Probabilistic Model, Soil Factor, Water Pipeline

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