Artificial Intelligence Models for the Mass Loss of Copper-Based Alloys under Cavitation

Dumitriu, Cristian Ștefan; Bărbulescu, Alina

doi:10.3390/ma15196695

Cited by 9 publications

(16 citation statements)

References 39 publications

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“…The fractal dimensions of the series of absolute mass loss variation per surface and of the image of the corroded sample's surface are estimated. The results complete the findings from [18,19,49], which proposed different mathematical models for the mass loss and mass loss per surface of some copper alloys in the cavitation field in similar conditions. The main advantage of this methodology is that it provides a non-destructive evaluation of corrosion using the fractal dimensions of the corrosion surface [50].…”

Section: Introductionsupporting

confidence: 81%

Fractal Characterization of Brass Corrosion in Cavitation Field in Seawater

Bărbulescu

Dumitriu

2023

Sustainability

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Cavitation is a physical process that produces complex effects on the machines and components working in conditions where it acts. One effect is the materials-mass loss by corrosion–erosion when components are introduced into fluids under cavitation. The analysis of the damages produced by cavitation is generally performed by using different destructive and non-destructive experimental techniques. Most studies on materials’ behavior in cavitation refer to the erosion–corrosion mechanism, and very few investigate the fissure propagation by fractal methods. None have investigated the fractal characteristics of the sample surface after erosion–corrosion or the multifractal characteristics of materials’ mass variation in time in a cavitation field. Therefore, this research proposes a computational approach to determine the pattern of materials’ damages produced by ultrasound cavitation. The studied material is a brass, introduced in seawater. Fractal and multifractal techniques are applied to the series of the absolute mass loss per surface and the sample’s micrography after corrosion. Such an approach has not been utilized for such a material in similar experimental conditions. This study emphasizes that the box dimension of the series of the absolute mass loss per surface is close to one, and its behaviour is close to a non-/monofractal. It is demonstrated that the material’s surface corrosion is not uniform, and its multifractal character is highlighted by the f(α)− spectrum and the multifractal dimensions, which have the following values: the capacity dimension = 1.5969, the information dimension = 1.49836, and the correlation dimension = 1.4670.

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Section: Introductionsupporting

confidence: 81%

Fractal Characterization of Brass Corrosion in Cavitation Field in Seawater

Bărbulescu

Dumitriu

2023

Sustainability

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“…The seawater parameters were: 22.17 g/L NaCl, pH = 7, 0.31 g/L–

, 0.051 mg/L Fe, 0.0033 mg/L Ni, and 6.27 meq/L total hardness. For details on the installation’s functioning, the reader may see [ 8 ].…”

Section: Methodsmentioning

confidence: 99%

“…Copper-based materials are frequently employed in many industries due to their behavior in different corrosive liquids [ 1 , 2 , 3 , 4 , 5 ]. The most common experimental procedures for the study of the behavior of such alloys are electrochemical methods [ 6 , 7 , 8 ] and synergy tests [ 3 , 9 ], noise recording [ 6 ], and electrochemical impedance spectroscopy [ 8 , 10 ]. The most used corrosive media are seawater [ 1 ], artificial NaCl solutions with different concentrations (3.5% in [ 2 , 10 ], other concentrations in [ 10 ]), NaCl, NaOH, and KOH [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…Spatial data were used in [ 39 ] to investigate the roughness of metal samples. Fractal and multifractal analysis were performed to investigate the results of corrosion or corrosion–erosion of steel and copper alloys [ 37 , 40 , 41 , 42 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

“…Despite investigations of the mass loss of copper-based alloys having been performed [ 18 , 41 , 42 , 43 ] and the existence of multifractality applications in engineering, combined investigation (exploring the corroded surfaces of materials in an ultrasonic cavitation field) has been less reported [ 41 ]. Therefore, in this article, we continue the investigation from [ 8 , 41 , 42 , 43 ], aiming to determine the pattern of the mass loss of copper-based alloys from the viewpoint of fractal/multifractal theory. The goal is to check the hypothesis that the fractal/multifractal measures significantly differ for the two materials and compare the results with those obtained for a brass [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

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Fractal Characterization of the Mass Loss of Bronze by Erosion–Corrosion in Seawater

Bărbulescu

2023

Materials

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The fractal approach is one of the nondestructive techniques for analyzing corrosion’s effects on different materials. This article utilizes it to analyze the erosion–corrosion produced by cavitation on two types of bronze introduced into an ultrasonic cavitation field to investigate the differences between their behavior in saline water. The aim is to check the hypothesis that the fractal/multifractal measures significantly differ for the studied materials that belong to the same class (bronze) as a step in applying fractal techniques to distinguish between two materials. The study emphasizes the multifractal characteristics of both materials. While the fractal dimensions do not significantly differ, the highest multifractal dimensions correspond to the sample of bronze with Sn.

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