Sainte-Foy-lès-Lyon, France
Sainte-Foy-lès-Lyon, France

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Refait P.,University of La Rochelle | Jeannin M.,University of La Rochelle | Sabot R.,University of La Rochelle | Antony H.,Corrodys | Pineau S.,Accoast SAS
Corrosion Science | Year: 2015

Carbon steel coupons were set in the tidal zone of a French seaport for 7years with or without cathodic protection. The average corrosion rates decreased from 90μmyr-1 to 9μmyr-1 under cathodic protection. The corrosion product layers covering the unprotected coupons, characterized by Raman spectroscopy and X-ray diffraction, were mainly made up of magnetite and Fe(III) oxyhydroxides, with magnetite being clearly predominant. The products of the residual corrosion process under cathodic protection, similar to those observed at open circuit potential, formed a thin layer on the steel surface under the calcareous deposit. © 2014 Elsevier Ltd.


Refait P.,University of La Rochelle | Jeannin M.,University of La Rochelle | Sabot R.,University of La Rochelle | Antony H.,Corrodys | Pineau S.,Accoast SAS
Corrosion Science | Year: 2013

Carbon steel coupons were permanently exposed to seawater in the low water zone of two French harbors for 5. years before to be subjected to cathodic protection (potential about -0.95. V vs. Ag/AgCl/seawater) for 1. year. The application of cathodic polarization to the previously unprotected coupons induced the transformation of GR(SO42-) into GR(CO32-). Other coupons were permanently protected by cathodic protection during the 6. years immersion. A thin film of green rust and mackinawite was observed on the steel surface. This film was covered by a thicker layer of calcareous deposits. © 2013 Elsevier Ltd.


Mao A.,CORRODYS | Mao A.,University of Caen Lower Normandy | Mahaut M.-L.,University of Caen Lower Normandy | Mahaut M.-L.,British Petroleum | And 4 more authors.
Marine Pollution Bulletin | Year: 2011

Since the early 1960s, the application of aluminum alloy sacrificial anodes to mitigate marine corrosion has been well known. The aim of this work was to study aluminum bioconcentration in Mytilus edulis by an in vitro test performed in two tanks: the first containing non-contaminated water (NCW) and the second containing aluminum-contaminated water (CW) (530μgL -1) released by sacrificial anode. The mussels were collected and examined over a period of 8weeks. A comparison between the aluminum concentrations in the digestive glands of mussels from the CW and NCW tanks shows that the highest value (1700mg/kgd.w.) was found in the CW mussels collected after 13days. In NCW, the mean aluminum concentration in digestive glands during the test was 281mg/kgd.w. The rapid concentration decrease in digestive glands is probably due to the inhibition of filtering activity due to valve closure at the high concentration as well as the induction of the detoxification response. © 2011.


PubMed | CORRODYS
Type: Evaluation Studies | Journal: Marine pollution bulletin | Year: 2011

Since the early 1960s, the application of aluminum alloy sacrificial anodes to mitigate marine corrosion has been well known. The aim of this work was to study aluminum bioconcentration in Mytilus edulis by an in vitro test performed in two tanks: the first containing non-contaminated water (NCW) and the second containing aluminum-contaminated water (CW) (530 g L(-1)) released by sacrificial anode. The mussels were collected and examined over a period of 8 weeks. A comparison between the aluminum concentrations in the digestive glands of mussels from the CW and NCW tanks shows that the highest value (1700 mg/kg d.w.) was found in the CW mussels collected after 13 days. In NCW, the mean aluminum concentration in digestive glands during the test was 281 mg/kg d.w. The rapid concentration decrease in digestive glands is probably due to the inhibition of filtering activity due to valve closure at the high concentration as well as the induction of the detoxification response.

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