Reduction of potential ennoblement of stainless steel in natural seawater by an ecofriendly biopolymer

Type Article
Date 2020-02
Language English
Author(s) Abi Nassif L.1, 2, Rioual S.1, Farah W.2, Hellio C.3, Fauchon M.3, Trepos R3, Abboud M.2, Diler E.4, Thierry D.4, Lescop B.1
Affiliation(s) 1 : Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France
2 : UEGP, Faculté des Sciences, Université Saint Joseph, Beyrouth, Lebanon
3 : Univ Brest, Laboratoire des Sciences de l’Environnement MARin (LEMAR), CNRS, IRD, Ifremer, F-29280 Plouzané, France
4 : Institut de la Corrosion, 220 rue Pierre Rivoalon, 29200 Brest, France
Source Journal Of Environmental Chemical Engineering (2213-2929) (Elsevier BV), 2020-02 , Vol. 8 , N. 1 , P. 103609 (4p.)
DOI 10.1016/j.jece.2019.103609
WOS© Times Cited 7
Keyword(s) Biopolymer, Steel, Ennoblement, Antimicrobial, Alginate, Biofilm

The effect of biofilm formation on passive stainless steel in seawater environments is of primary importance since it leads to potential ennoblement of surfaces and subsequently to localized corrosion such as pitting and crevice corrosion. This study aims at developing an ecofriendly alginate biopolymer containing both non-toxic calcium and a limited amount of biocidal zinc ions which inhibits this effect. For this purpose, calcium alginate containing less than 1 % of zinc ions localized in the vicinity of the steel surface in natural and renewed seawater is demonstrated to reduce significantly the ennoblement process of steel. After 1 month of immersion, a mass loss of only 4 % of the active material is observed authorizing thereby long-term protection of steel in real environment.

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Abi Nassif L., Rioual S., Farah W., Hellio C., Fauchon M., Trepos R, Abboud M., Diler E., Thierry D., Lescop B. (2020). Reduction of potential ennoblement of stainless steel in natural seawater by an ecofriendly biopolymer. Journal Of Environmental Chemical Engineering, 8(1), 103609 (4p.). Publisher's official version : , Open Access version :