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Larche, Nicolas; Dezerville, Philippe; Le Flour, Denise; Vinzio, Pascal; Kofler, Karl-heinz; Thierry, Dominique. |
Stainless steel is widely used in seawater reverse osmosis units (SWRO) for both good mechanical and corrosion resistance properties. However, many corrosion failures of stainless steel in SWRO desalination units have been reported. These failures may often be attributed to un-adapted stainless steel grade selection and/or to the particular aggressive seawater conditions in "warm" regions (high ambient temperature, severe biofouling, etc.). Cathodic protection (CP) is a well-known efficient system to prevent corrosion of metallic materials in seawater. It is successfully used in the oil and gas industry to protect carbon steel structures exposed in open-sea. However, the specific service conditions of SWRO units may seriously affect the efficiency of such... |
Tipo: Text |
Palavras-chave: Corrosion; Seawater reverse osmosis; Stainless steels; Cathodic protection. |
Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00344/45562/45163.pdf |
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Trigodet, Florian; Larché, Nicolas; Morrison, Hilary G.; Maignien, Lois; Thierry, Dominique. |
The ennoblement of stainless steel (e.g., the increase of open circuit potential [OCP]) is associated with bacterial colonization. This increases the risk of localized corrosion as the critical pitting/crevice potential can be overcome, especially for lower grade stainless steel. In this study, we assessed the influence of dissolved oxygen content (DOC) on the crevice corrosion of duplex and super duplex stainless steels. In addition, we used DNA amplicon sequencing to identify the bacteria most likely associated with the ennoblement. Above approximately 100 parts per billion (ppb) of dissolved oxygen, the ennoblement of OCP was observed leading to an increased risk of localized corrosion. Below approximately 100 ppb of dissolved oxygen, no ennoblement... |
Tipo: Text |
Palavras-chave: 16S rRNA gene; Electroactive bacteria; Ennoblement; Microbial ecology; Natural seawater; Stainless steel. |
Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/70026/67934.pdf |
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