Reduction of potential ennoblement of stainless steel in natural seawater by an ecofriendly biopolymer - Université de Bretagne Occidentale Access content directly
Journal Articles Journal of Environmental Chemical Engineering Year : 2020

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

Abstract

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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Dates and versions

hal-02966445 , version 1 (30-11-2020)

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L. Abi Nassif, Stéphane Rioual, W. Farah, Claire Hellio, M. Fauchon, et al.. Reduction of potential ennoblement of stainless steel in natural seawater by an ecofriendly biopolymer. Journal of Environmental Chemical Engineering, 2020, 8 (1), pp.103609. ⟨10.1016/j.jece.2019.103609⟩. ⟨hal-02966445⟩
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