Corrosion behaviour of non-ferrous alloys in seawater in the Polish marine industry

Birn, J.; Skalski, I.

doi:10.1533/9781845693084.1.3

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…Propellers, usually made of copper alloys such as bronze and brass, are the main components of the vessel propulsion system used to drive vessels forward. However, seawater is highly corrosive due to the presence of chlorine ions, which are the primary cause of the corrosion of copper alloys [2]. Although copper-based alloys have reasonably good corrosion resistance, running unprotected propellers can cause damage due to electrochemical, mechanical, and biologically influenced corrosion.…”

Section: Introductionmentioning

confidence: 99%

Cr-Free Anticorrosive Primers for Marine Propeller Applications

Wang,

De Silva,

Jones

et al. 2024

Polymers

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Marine propellers work under severe service conditions, where they commonly suffer from mechanical, electrochemical, and biological corrosion damage. The major mechanical corrosion involves cavitation, erosion, and impingement corrosion. On the other hand, the major electrochemical corrosion involves galvanic corrosion and electrolysis. As a result, consideration of both desired mechanical and electrochemical properties is necessary when designing a marine propeller coating. In this study, a PVB (polyvinyl butyral) and an epoxy coating were formulated without corrosion inhibitors to investigate the desired coating properties for marine propeller applications. The two coatings were compared with a Cr-containing commercial marine propeller coating to investigate the advantages and disadvantages of using PVB and epoxy for marine propeller coatings. It was found that it is desirable for marine propeller coatings to be flexible to avoid cracking and flaking; to be able to withstand high pH in order to resist cathodic disbondment (electrolysis); to have adequate primer–substrate adhesion; and, ideally, to be able to self-heal when the coating is damaged (cavitation). It was found that the PVB-ZO coating has more desirable properties, and introducing self-healing properties could be one of the options for further optimization in the future.

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Section: Introductionmentioning

confidence: 99%

Cr-Free Anticorrosive Primers for Marine Propeller Applications

Wang,

De Silva,

Jones

et al. 2024

Polymers

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Concurrent Enhancement of Strength and Corrosion Resistance in Ultrafine-grained Al6063 Tubes

Ebrahimi

Göde

Attarilar

et al. 2021

Trans Indian Inst Met

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Feasibility of Carbon Nanoparticle Coatings as Protective Barriers for Copper─Wetting Assessment

et al. 2022

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Copper is extensively used in a wide range of industrial and daily-life applications, varying from heat exchangers to electrical wiring. Although it is protected from oxidation by its native oxide layer, when subjected to harsh environmental conditionssuch as in coastal regionsthis metal can rapidly degrade. Therefore, in this study, we analyze the potential use of carbon nanoparticle coatings as protective barriers due to their intrinsic hydrophobic wetting behavior. The nanocarbon coatings were produced via electrophoretic deposition on Cu platelets and characterized via scanning electron microscopy, confocal laser scanning microscopy, and sessile drop test; the latter being the primary focus since it provides insights into the wetting behavior of the produced coatings. Among the measured coatings, graphite flakes, graphene oxide, and carbon nanotube (CNT) coatings showed superhydrophobic behavior. Based on their wetting behavior, and specifically for electrical applications, CNT coatings showed the most promising results since these coatings do not significantly impact the substrate’s electrical conductivity. Although CNT agglomerates do not affect the wetting behavior of the attained coatings, the coating’s thickness plays an important role. Therefore, to completely coat the substrate, the CNT coating should be sufficiently thickabove approximately 1 μm.

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Corrosion behaviour of non-ferrous alloys in seawater in the Polish marine industry

Cited by 4 publications

References 29 publications

Cr-Free Anticorrosive Primers for Marine Propeller Applications

Cr-Free Anticorrosive Primers for Marine Propeller Applications

Concurrent Enhancement of Strength and Corrosion Resistance in Ultrafine-grained Al6063 Tubes

Feasibility of Carbon Nanoparticle Coatings as Protective Barriers for Copper─Wetting Assessment

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