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The role of iron in sulfide induced corrosion ofsewer concrete

Journal Article


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 .

Authors


  •   Jiang, Guangming
  •   Wightman, Elaine (external author)
  •   Donose, Bogdan C. (external author)
  •   Yuan, Zhiguo (external author)
  •   Bond, Philip (external author)
  •   Keller, Jurg (external author)

Publication Date


  • 2014

Citation


  • Jiang, G., Wightman, E., Donose, B. C., Yuan, Z., Bond, P. L. & Keller, J. (2014). The role of iron in sulfide induced corrosion ofsewer concrete. Water Research, 49 166-174.

Scopus Eid


  • 2-s2.0-84890022955

Number Of Pages


  • 8

Start Page


  • 166

End Page


  • 174

Volume


  • 49

Place Of Publication


  • United Kingdom

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 .

Authors


  •   Jiang, Guangming
  •   Wightman, Elaine (external author)
  •   Donose, Bogdan C. (external author)
  •   Yuan, Zhiguo (external author)
  •   Bond, Philip (external author)
  •   Keller, Jurg (external author)

Publication Date


  • 2014

Citation


  • Jiang, G., Wightman, E., Donose, B. C., Yuan, Z., Bond, P. L. & Keller, J. (2014). The role of iron in sulfide induced corrosion ofsewer concrete. Water Research, 49 166-174.

Scopus Eid


  • 2-s2.0-84890022955

Number Of Pages


  • 8

Start Page


  • 166

End Page


  • 174

Volume


  • 49

Place Of Publication


  • United Kingdom