The corrosive power of golden mussel (L. fortunei) macrofouling on steel structuresg.
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Date
2014
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Abstract
Abstract In this study it was performed a detailed morphological-structural
analysis of the corrosion products resulting from golden mussel
(Limnoperna fortunei) macrofouling on steel structures. Scanning electron microscopy, without previous metallization of the observed
structures, was utilized in the study. With this analysis it was possible to build a new scenario for understanding this corrosion process,
as several important facts were observed. Firstly, the presence of at least three types of bacteria able to corrode metals was detected:
sulphate reducing bacteria, iron-depositing
bacteria, and Fe3+ reducing anaerobic bacteria which produce ferrous hydroxy carbonate from
magnetite. The presence and proliferation of colonies of these micro-organisms
can be in many ways favored by the dense mussel fouling.
Also, the analysis of the cross-sectional
structure of the corrosion layer allowed identifying the basic mechanism by which the metal
is consumed by the corrosion process.
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Keywords
Morphological-structural analysis, Micro-organisms
Citation
CASSINO, F. S. L. et al. The corrosive power of golden mussel (L. fortunei) macrofouling on steel structuresg. PCH Notícias & SHP News, v. 60, n. 1, p. 14-18, jan./mar. 2014. Disponível em: <http://cerpch.unifei.edu.br/wp-content/uploads/revistas/revista-60.pdf#page=14>. Acesso em: 24 jul. 2017.