Inhibitor mixture for reducing bacteria growth and corrosion on marine steel

High strength steel in marine environments suffers from severe corrosion susceptibility and the presence of bacteria can exacerbate the effect, accelerating degradation via microbiologically influenced corrosion (MIC). Here we propose a novel approach to MIC inhibition by designing a system capable...

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Bibliographic Details
Published in:Critical studies in media communication 2022-03, Vol.75 (8&9), p.619
Main Authors: Catubig, Rainier A, Michalczyk, Agnes, Neil, Wayne C, McAdam, Grant, syth, John, Ghorbani, Mahdi, Yunis, Ruhamah, Ackland, M Leigh, syth, Maria, Somers, Anthony E
Format: Article
Language:English
Subjects:
Bacteria
Bacterial corrosion
Cetyltrimethylammonium bromide
Corrosion
Corrosion effects
Corrosion environments
Corrosion inhibitors
Corrosion products
Corrosion tests
High strength steels
Hydroxycinnamic acid
Lanthanum
Marine environment
Mixtures
Sea water corrosion
Seawater
Structural steels
Toxicity testing
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Summary:High strength steel in marine environments suffers from severe corrosion susceptibility and the presence of bacteria can exacerbate the effect, accelerating degradation via microbiologically influenced corrosion (MIC). Here we propose a novel approach to MIC inhibition by designing a system capable of limiting the effects of both bacterial growth and corrosion. The combination of a newly synthesised compound, cetrimonium 4-hydroxycinnamate (Cet-4OHCin), with lanthanum 4-hydroxycinnamate was the only system tested to date that could both inhibit abiotic corrosion in artificial seawater and minimise bacteria consortium densities over an exposure period of 24 h. This success was proposed to be due to them having the same anion, making them stable when mixed in the solution of the test environment. Furthermore, we confirmed from cytotoxicity testing that Cet-4OHCin demonstrated similarly limited toxicity towards human cells as the commercially available cetrimonium bromide, a known safe additive to cosmetic products. This new system shows promise as a safe and effective multifunctional inhibitor mixture to reduce the effects of MIC.
ISSN:1529-5036
DOI:10.1071/CH21266