The role of iron in sulfide induced corrosion ofsewer concrete

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Guangming Jiang
  • Elaine Wightman
  • Bogdan C. Donose
  • Philip L. Bond
  • Jurg Keller

Detail(s)

Original languageEnglish
Pages (from-to)166-174
Journal / PublicationWater Research
Volume49
Publication statusPublished - 1 Feb 2014
Externally publishedYes

Abstract

The sulfide-induced corrosion of concrete sewer is a widespread and expensive problem for water utilities worldwide. Fundamental knowledge of the initiation and propagation of sewer corrosion, especially the interactions between chemical reactions and physical structure changes, is still largely unknown. Advanced mineral analytical techniques were applied to identify the distribution of corrosion products and the micro-cracking that developed along the corrosion boundary. It was found that sewer concrete corrosion caused by reactions with sulfuric acid progressed uniformly in the cement of concrete. In contrast to conventional knowledge, iron rust rather than gypsum and ettringite was likely the factor responsible for cracking ahead of the corrosion front. The analysis also allowed quantitative determination of the major corrosion products, i.e., gypsum and ettringite, with the latter found closer to the corrosion front. The conceptual model based on these findings clearly demonstrated the complex interactions among different chemical reactions, diffusion, and micro-structure changes. © 2013 .

Research Area(s)

  • Corrosion, Cracking, Hydrogen sulfide, Iron, Mineral liberation analysis, Sewer

Bibliographic Note

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Citation Format(s)

The role of iron in sulfide induced corrosion ofsewer concrete. / Jiang, Guangming; Wightman, Elaine; Donose, Bogdan C. et al.
In: Water Research, Vol. 49, 01.02.2014, p. 166-174.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review