Biofouling and corrosion rate of welded Nickel Aluminium Bronze in natural and simulated seawater

Tamsin H E Dobson; Anna Yunnie; Dimitrios Kaloudis; Nicolas O Larrosa; Harry Coules

doi:10.1080/08927014.2024.2326067

Biofouling and corrosion rate of welded Nickel Aluminium Bronze in natural and simulated seawater

Tamsin H E Dobson^*, Anna Yunnie, Dimitrios Kaloudis, Nicolas O Larrosa, Harry Coules

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

Updated understanding on the effect of biofouling on corrosion rate is needed to protect marine structures as climate change is altering seawater physiochemistry and biofouling organism distribution. Multi-disciplinary techniques can improve understanding of biofouling development and associated corrosion rates on metals immersed in natural seawater (NSW). In this study, the development of biofouling and corrosion on welded Nickel Aluminium Bronze (NAB) was investigated through long-term immersion tests in NSW, simulated seawater (SSW) and air. Biofouling was affected by geographic location within the marina and influenced corrosion extent. The corrosion rate of NAB was accelerated in the initial months of exposure in NSW (1.27 mm.yr−1) and then settled to 0.11 mm.yr−1 (annual average). This was significantly higher than the 0.06 mm.yr−1 corrosion rate measured in SSW, which matched published rates. The results suggest that corrosion rates for cast NAB should be revised to take account of biofouling and updated seawater physiochemistry.

Original language	English
Pages (from-to)	193-208
Number of pages	16
Journal	Biofouling
Volume	40
Issue number	2
DOIs	https://doi.org/10.1080/08927014.2024.2326067
Publication status	Published - 8 Mar 2024

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© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

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1 Article (Academic Journal)

Corrosion mechanisms of plasma welded Nickel aluminium bronze immersed in seawater
Dobson, T., Larrosa, N., Reid, M., Rajamudili, K., Ganguly, S. & Coules, H., 15 May 2024, In: Corrosion Science. 232, 16 p., 112004.
Research output: Contribution to journal › Article (Academic Journal) › peer-review

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3 Citations (Scopus)

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title = "Biofouling and corrosion rate of welded Nickel Aluminium Bronze in natural and simulated seawater",

abstract = "Updated understanding on the effect of biofouling on corrosion rate is needed to protect marine structures as climate change is altering seawater physiochemistry and biofouling organism distribution. Multi-disciplinary techniques can improve understanding of biofouling development and associated corrosion rates on metals immersed in natural seawater (NSW). In this study, the development of biofouling and corrosion on welded Nickel Aluminium Bronze (NAB) was investigated through long-term immersion tests in NSW, simulated seawater (SSW) and air. Biofouling was affected by geographic location within the marina and influenced corrosion extent. The corrosion rate of NAB was accelerated in the initial months of exposure in NSW (1.27 mm.yr−1) and then settled to 0.11 mm.yr−1 (annual average). This was significantly higher than the 0.06 mm.yr−1 corrosion rate measured in SSW, which matched published rates. The results suggest that corrosion rates for cast NAB should be revised to take account of biofouling and updated seawater physiochemistry.",

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AU - Larrosa, Nicolas O

AU - Coules, Harry

PY - 2024/3/8

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N2 - Updated understanding on the effect of biofouling on corrosion rate is needed to protect marine structures as climate change is altering seawater physiochemistry and biofouling organism distribution. Multi-disciplinary techniques can improve understanding of biofouling development and associated corrosion rates on metals immersed in natural seawater (NSW). In this study, the development of biofouling and corrosion on welded Nickel Aluminium Bronze (NAB) was investigated through long-term immersion tests in NSW, simulated seawater (SSW) and air. Biofouling was affected by geographic location within the marina and influenced corrosion extent. The corrosion rate of NAB was accelerated in the initial months of exposure in NSW (1.27 mm.yr−1) and then settled to 0.11 mm.yr−1 (annual average). This was significantly higher than the 0.06 mm.yr−1 corrosion rate measured in SSW, which matched published rates. The results suggest that corrosion rates for cast NAB should be revised to take account of biofouling and updated seawater physiochemistry.

AB - Updated understanding on the effect of biofouling on corrosion rate is needed to protect marine structures as climate change is altering seawater physiochemistry and biofouling organism distribution. Multi-disciplinary techniques can improve understanding of biofouling development and associated corrosion rates on metals immersed in natural seawater (NSW). In this study, the development of biofouling and corrosion on welded Nickel Aluminium Bronze (NAB) was investigated through long-term immersion tests in NSW, simulated seawater (SSW) and air. Biofouling was affected by geographic location within the marina and influenced corrosion extent. The corrosion rate of NAB was accelerated in the initial months of exposure in NSW (1.27 mm.yr−1) and then settled to 0.11 mm.yr−1 (annual average). This was significantly higher than the 0.06 mm.yr−1 corrosion rate measured in SSW, which matched published rates. The results suggest that corrosion rates for cast NAB should be revised to take account of biofouling and updated seawater physiochemistry.

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Biofouling and corrosion rate of welded Nickel Aluminium Bronze in natural and simulated seawater

Abstract

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Research output

Corrosion mechanisms of plasma welded Nickel aluminium bronze immersed in seawater

Cite this