Corrosivity Level of Soils at Distinct Areas Where Pipeline Steel is Buried for Water Distribution, South-Africa

Khotso Khoele, Bongani Baloyi, Peter Apata Olubambi

Research output: Contribution to journalArticlepeer-review

Abstract

An engagement of different soil characterization techniques including ion chromatography, inductively coupled plasma, scanning electron microscopy, and X-ray diffraction (XRD) has been utilized to study nature of the soils from seven locations where corrosion previously occurred on buried pipeline steels. Moisture contents from engaged samples were below 20%, and the organic matter contents were negligible. The least resistivity was observed on soil sample (SS) 4. The energy-dispersive X-ray analysis showed notable amount of chloride in SS 4, while the XRD analysis revealed the formation of complex phases comprised goethite and hematite from SS 4. The overall view regarding corrosivity went in this order: SS 4, SS 1, SS 5, SS 7, SS 6, and SS 2. The recommended cathodic protection for soils was between −850 and −950 mV Cu/CuSO4.

Original languageEnglish
Pages (from-to)761-769
Number of pages9
JournalJournal of Failure Analysis and Prevention
Volume16
Issue number5
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Corrosion
  • Environment
  • Low-carbon steel
  • Pipelines
  • Soil

ASJC Scopus subject areas

  • General Materials Science
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering

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