Short term corrosion monitoring of carbon steel by bio-competitive exclusion of thermophilic sulphate reducing bacteria and nitrate reducing bacteria

2012 ◽  
Vol 77 ◽  
pp. 348-362 ◽  
Author(s):  
Amalia Halim ◽  
Elizabeth Watkin ◽  
Rolf Gubner
Keyword(s):  
Carbon Steel ◽  
Competitive Exclusion ◽  
Corrosion Monitoring ◽  
Short Term ◽  
Sulphate Reducing Bacteria ◽  
Reducing Bacteria ◽  
Nitrate Reducing Bacteria

scholarly journals Study of the Fe(II-III) hydroxysalts transformation according to the pH and the concentration of the ions present

2018 ◽  
Vol 7 (5) ◽  
pp. 359-369
Author(s):  
Farida Termemil ◽  
Marwa Ahmed-Malek ◽  
Assia Bourouba ◽  
Mohamed-rida Benloucif
Keyword(s):  
Carbon Steel ◽  
Cathodic Protection ◽  
Iron Hydroxide ◽  
Green Rust ◽  
Corrosion Products ◽  
Water Molecules ◽  
Marine Environments ◽  
Sulphate Reducing Bacteria ◽  
Reducing Bacteria ◽  
Ordinary Steel

Sulphated green rust, GR (SO4 2- ), is one of the main corrosion products of carbon steel in marine environments. It is Fe (II)-Fe(III) hydroxylsalt in sheets, consisting of alternating layers of iron-hydroxide type Fe(OH)2 , loaded positively due to the presence of the cations Fe(III) and negative interlayers consisting of anions and water molecules. This compound is strongly associated with the metabolism of sulphate-reducing bacteria, and can also evolve under cathodic protection. Thus, recently, GR (CO3 2- ) has been detected in place of GR (SO4 2- ) on already corroded ordinary steel, newly subjected to cathodic protection. This presence is due to the pH and[SO4 2−] [HCO3 − ⁄ ] conditions imposed by the cathodic protection. In this paper, we chemically synthesize sulfated and carbonate green rust in a chlorinated medium; we then study their respective transformation according to the concentration [SO4 2- ] / [HCO3 - ] ratio and pH. Our results show that from a GR (SO4 2- ), GR (CO3 2- ) is formed from a pH ≥8.2 for [SO4 2- ] / [HCO3 - ] = 12 and without any change in pH for [SO4 2- ] / [HCO3 - ] <12. Whereas from GR (CO3 2- ), GR (SO4 2- ) is formed for [SO4 2- ] / [HCO3 - ] > 1 without any change in pH.

scholarly journals Carbon steel corrosion induced by sulphate-reducing bacteria in artificial seawater: electrochemical and morphological characterizations

2016 ◽  
Vol 21 (4) ◽  
pp. 987-995 ◽  
Author(s):  
Mariana Silva de Paula ◽  
Márcia Monteiro Machado Gonçalves ◽  
Monick Alves da Cruz Rola ◽  
Diana José Maciel ◽  
Lilian Ferreira de Senna ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Corrosion ◽  
Artificial Seawater ◽  
Sulphate Reducing Bacteria ◽  
Reducing Bacteria

Microbially influenced corrosion of carbon steel in the presence of anaerobic sulphate-reducing bacteria

2019 ◽  
Vol 55 (2) ◽  
pp. 127-137 ◽  
Author(s):  
Tomáš Černoušek ◽  
Rojina Shrestha ◽  
Hana Kovářová ◽  
Roman Špánek ◽  
Alena Ševců ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Sulphate Reducing Bacteria ◽  
Microbially Influenced Corrosion ◽  
Reducing Bacteria
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