Interaction of marine organisms on localized corrosion of 316L stainless steel in Dalian seawater
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 18 April 2023
Issue publication date: 13 June 2023
Abstract
Purpose
The purpose of this paper is to study the interaction of main marine organisms on localized corrosion of 316L stainless steel in the Dalian Sea area.
Design/methodology/approach
The steel plate was immersed in the Dalian Sea area for nine months to observe the biofouling and localized corrosion. The local potential distribution on the steel plate covered by marine organisms was measured. The local electrochemical measurements were performed to facilitate understanding the interfacial status under different biofouling conditions. The local surface morphologies and corrosion products were characterized.
Findings
The localized corrosion of stainless steel is mainly induced by the attachment of barnacles on the steel. The mussels have no influence on the localized corrosion. The cover of sea squirts could mitigate the localized corrosion induced by barnacles. Both crevice corrosion and pitting corrosion were found beneath the barnacle without the covering of sea squirts. The pitting damage was more serious than the crevice corrosion in the Dalian Sea area. The probing of sulfur element indicates that the potential growth of sulfate-reducing bacteria at barnacle center.
Originality/value
The above findings revealed that the interaction of marine organisms has significant influences on the localized corrosion of stainless steel. The influences of macro-fouling and micro-fouling on localized corrosion are discussed.
Keywords
Acknowledgements
This research was sponsored by National Key Research and Development Program [No. 2022YFC2806204] and Natural Science Foundation of China [No. 52001055].
Citation
Chen, W., Wang, M., Li, M., Li, K., Huang, Y. and Xu, Y. (2023), "Interaction of marine organisms on localized corrosion of 316L stainless steel in Dalian seawater", Anti-Corrosion Methods and Materials, Vol. 70 No. 4, pp. 157-165. https://doi.org/10.1108/ACMM-02-2023-2755
Publisher
:Emerald Publishing Limited
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