PEO coating containing copper: A promising anticorrosive and antifouling coating for seawater application of AA 7075

Cerchier, Pietrogiovanni; Pezzato, Luca; Gennari, Claudio; Moschin, Emanuela; Moro, Isabella; Dabalà, Manuele

doi:10.1016/j.surfcoat.2020.125774

Cited by 47 publications

(30 citation statements)

References 32 publications

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“…In all the samples, the peaks of Al and Si, coming from the reflection from the substrate, can be observed. Moreover, the presence of SiO 2 , Al 2 O 3 , Al 2 SiO 5 (kyanite), and NaAlSi 3 O 8 was observed, in agreement with the literature 46 , 47 . The more important difference among the patterns was the quantity of amorphous phase that was remarkably higher in the as-printed sample (Fig.…”

Section: Resultssupporting

confidence: 91%

Influence of silicon morphology on direct current plasma electrolytic oxidation process in AlSi10Mg alloy produced with laser powder bed fusion

Pezzato

Gennari

Franceschi

et al. 2022

Sci Rep

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In this work, plasma electrolytic oxidation (PEO) process was applied on AlSi10Mg samples, produced with laser powder bed fusion (L-PBF), in the as printed condition and after different heat treatments, and, for comparison, on as-cast samples of AlSi10Mg. PEO process was performed in direct-current mode using high current densities and short time in a basic silicate electrolyte. For the first time, the effects of silicon morphology in L-PBF AlSi10Mg samples, in as printed condition and after different heat treatments, on the obtained PEO coating were investigated in terms of microstructure and corrosion properties. The microstructure of the substrate was characterized with optical and electron microscopy observations (optical microscopy OM, scanning electron microscopy SEM, and transmission electron microscopy TEM) and with X-ray diffraction (XRD). The analysis showed that heat treatments of annealing and solution treating modified the morphology and distribution of silicon in the samples obtained through L-PBF. The PEO coated samples were characterized with SEM, both on the surface and in the cross-section, and compositional analysis were performed with energy dispersive spectroscopy (EDS) analysis and elemental mapping. The coatings were also analyzed with XRD and the corrosion properties evaluated through electrochemical impedance spectroscopy (EIS) tests. Also microhardness tests were performed on the substrates and on the coatings. The microstructure of the coatings was strongly influenced by the silicon distribution. In particular, a non-uniform distribution of silicon and the presence of iron-rich intermetallic (obtained in the as-cast and solution treated samples) induced the formation of more porous and thinner coatings in comparison with the ones obtained in the as printed and annealed samples. The not-uniform silicon distribution produced a not-homogenous distribution of silicon into the coatings. The particular cellular structure of the as printed sample induced the formation of a coating with a higher amorphous fraction, in comparison with the ones produced on the other samples. The higher thickness and lower porosity of the coatings obtained on the annealed and as printed samples resulted in an increase of the corrosion resistance.

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Section: Resultssupporting

confidence: 91%

Influence of silicon morphology on direct current plasma electrolytic oxidation process in AlSi10Mg alloy produced with laser powder bed fusion

Pezzato

Gennari

Franceschi

et al. 2022

Sci Rep

Self Cite

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“…The highest concentration of Cu is recorded in station R6 while the lowest concentration of Cu is in station R3. The increased concentration of Cu in the Perai river may be due to the port activities such as loading and unloading the materials from the boat, cleaning the boat process, antifouling painting applications, and other related activities [24]. The runoff from urban areas can also influence the concentration of Cu in the environment.…”

Section: Resultsmentioning

confidence: 99%

Heavy metals level in the surficial sediment from Perai River of Penang, Malaysia

Foo

Ecklyn

Tan

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Perai river is one of the important rivers to Penang and Kedah states. Many industries are located along the river that flows to the Strait of Malacca. In order to gather the status of pollution along the river, a total of 47 stations were established to measure the heavy metals content and the sediment characteristics. Findings show that finer sediments had dominated all sampling sites as samples are mostly muddy sediment. The heavy metal concentration in the surficial sediment was analyzed using the Inductively Coupled Plasma Mass Spectrometer after the Teflon Bomb digestion method. The average concentration for Zn, Cr, Cu, Cd, Pb were 74.7±33.3, 66.0±28.1, 21.8±9.05, 0.42±0.32, and 28.6±6.84 μg/g dry weights, respectively. Generally, the concentration of metals studied seemed to be controlled by natural processes. This is proved by the enrichment factor, categorized as a deficiency to minimal enrichment, and can be concluded to be the main source from the lithogenous in origin. The sources of the heavy metals in some of the stations in the Perai river are speculated from the nearby urban runoff, industry activities along with the river, fishing and shipping activities, and land transportation emission may also accumulate for the pollution in the river.

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“…The material loss caused by the joint action of wear and corrosion during tribocorrosion has been extensively studied in detail [48,49]. During tribocorrosion, it was assumed that (1) corrosion only occurred within the wear track area during the tribocorrosion tests and (2) no corrosion occurred during the pure wear tests. Consequently, the total material wear loss volume ( T ) during the tribocorrosion test could be divided into the following parts: (1) the loss volume caused by pure wear behaviors ( W ); (2) the loss volume caused by pure corrosion behaviors ( o C ); (3) the loss volume caused by the joint action ( T ), which includes two parts: the loss volume caused by wear contribution to corrosion ( w C ); and the loss volume owing to the corrosion contribution to wear ( c W ).…”

Section: Discussionmentioning

confidence: 99%

“…Currently, the most challenging limitation of marine equipment is that its metal components experience friction, wear, and erosion simultaneously in a strongly corrosive marine environment, which leads to the premature failure of these components. The service life and reliability of marine equipment primarily depend on the wear and corrosion performance of the components in seawater [1,2]. Thus, the ideal solution is to protect the component surface using hard coatings with favorable wear-resistant and anti-corrosion properties [3].…”

Section: Introductionmentioning

confidence: 99%

Structure and tribocorrosion behavior of CrMoSiCN nanocomposite coating with low C content in artificial seawater

Zhou

Zhang

et al. 2020

Friction

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CrMoSiCN nanocomposite coatings with a low C content were prepared on Ti-6Al-4V using an unbalanced magnetron sputtering system, and their corresponding microstructures, mechanical properties, and tribocorrosion performance were evaluated in detail. The results revealed that the CrMoSiCN coating had a compact nanocomposite microstructure consisting of CrN and Mo2N nanocrystallites, (Cr, Mo)N solid solution, and Si-C-N amorphous phases. Moreover, the coating exhibited superior mechanical properties with a hardness of 28.6 GPa and an elastic modulus of 273 GPa, owing to the solid solution strengthening effect. The tribocorrosion test results showed that the dominant failure of the Ti-6Al-4V alloy was caused by the corrosion contribution to wear behaviors (synergistic effect). The CrMoSiCN nanocomposite coating could effectively alleviate the material loss caused by the synergistic effect of corrosion and wear behaviors, leading to pure wear behaviors during the entire tribocorrosion process. The corresponding tribocorrosion mechanisms under the open circuit potential and dynamic polarization conditions were discussed in terms of their tribocorrosion behaviors.

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PEO coating containing copper: A promising anticorrosive and antifouling coating for seawater application of AA 7075

Cited by 47 publications

References 32 publications

Influence of silicon morphology on direct current plasma electrolytic oxidation process in AlSi10Mg alloy produced with laser powder bed fusion

Influence of silicon morphology on direct current plasma electrolytic oxidation process in AlSi10Mg alloy produced with laser powder bed fusion

Heavy metals level in the surficial sediment from Perai River of Penang, Malaysia

Structure and tribocorrosion behavior of CrMoSiCN nanocomposite coating with low C content in artificial seawater

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