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Cavitation erosion behavior of super-hydrophobic coatings on Al5083 marine aluminum alloy by J. Fahim; S.M.M. Hadavi; H. Ghayour; S.A. Hassanzadeh Tabrizi is a Engineering article available to read on EtoBox.

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Al5083 alloy is widely used in marine and ship building industries for the construction of ship structures due to its high strength, fatigue resistance, and relatively good corrosion resistance against salty water. However, cavitation is one of its limiting factors in some important parts such as propellers used for marine applications. In the current research, the cavitation erosion behavior of super-hydrophobic coatings deposited on Al5083 aluminum was studied. The superhydrophobic coating process included anodizing the surface in sulfuric acid followed by the surface chemical modification process with two Triethoxy Octylsilane (KH-832) and 1H,1H,2H,2H-Perfluoro Octyl-Trichloro Silane (PFOTS) classes. The cavitation test was conducted according to ASTM-G32 standard using the vibration amplitude of 20μ in distilled water. The surface damage on the super-hydrophobic coatings was investigated by using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Cavitation erosion caused the surface roughness of the as-anodized sample to increase from 85.9 nm to 153 nm, whereas for the coated samples, the cavitation process resulted in surface smoothing. In fact, cavitation

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Author

J. Fahim; S.M.M. Hadavi; H. Ghayour; S.A. Hassanzadeh Tabrizi

Publisher

Elsevier BV

Published

2019

Language

EN

Field

Engineering (Physical Sciences)