One-Step Preparation of Super-Hydrophobic Micro-Nano Dendrites on Al Alloy for Enhanced Corrosion Resistance

Li, Xuewu; Tian, Shuai; Li, Ben; Zhang, Chuanwei; Zhong, B.; Yuan, Le; Zhang, Qiaoxin

doi:10.3390/met8110960

Cited by 8 publications

(4 citation statements)

References 29 publications

(29 reference statements)

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“…The purpose of this test was also the study of the degree of biofouling coverage in relation to the surface roughness of the coatings. From the test performed in our previous work [16], fouling growth was limited by the gases entrapped in the SHS, dissolved gases coming from the presence of biology and living systems, that is, O 2 and CO 2 . In particular, with time, these gases tend to coalesce in bubbles.…”

Section: Exposure Environments and Expositionmentioning

confidence: 99%

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Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

2019

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Recyclable materials can be referred to as both those materials directly recycled from wastes and those derived from any kind of transformation before use. Highly water repellent coatings with wettability properties, known as superhydrophobic (SH), are related to surfaces with contact angles above 150° and a very small hysteresis. The small area available for these surfaces when in contact with water can be exploited in many applications in which interactions with an aqueous environment are usually desirable to be avoided, like for protection and friction reduction in a marine environment. SH coatings under investigation have been prepared starting from recyclable materials with the aim to provide a sustainable and low cost solution, with potential application to large surfaces in a marine environment. Wetting studies, surface characterization, and electrochemical tests show how these surfaces can be used in terms of fouling prevention and the protection of metals in underwater conditions.

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Section: Exposure Environments and Expositionmentioning

confidence: 99%

“…To the best of our knowledge, only few reference data are available [7,[14][15][16] about superhydrophobic surfaces in real seawater environments in a time window greater than days. Furthermore, in these works, no recyclable materials have been used.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

2019

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“…As it was clearly demonstrated in recent literature [5,6], laser surface texturing has emerged as powerful and versatile nanotechnology for producing surfaces with hierarchical roughness and high curvature of textural elements. Such roughness, required for obtaining the superhydrophobic state of materials, allows making an important step for the development of new materials for protection against icing and corrosion, fouling and bacterial contaminations [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Thermally Induced Gradient of Properties on a Superhydrophobic Magnesium Alloy Surface

Emelyanenko

Domantovsky

Chulkova

et al. 2020

Metals

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Fabrication of superhydrophobic coatings for magnesium alloys is in high demand for various industrial applications. Such coatings not only extend the service life of metal structures, but also impart additional useful functional properties to the coated surface. In this study, we show that nanosecond laser processing of long, thin stripes of magnesium alloys followed by the deposition of a hydrophobic agent onto the magnesium oxide layer is a simple, convenient, and easily reproducible method for obtaining superhydrophobic surfaces with property gradient along the sample. The mechanism of the gradient in wettability and electrochemical properties of the magnesium alloy surface is discussed based on the high-temperature growth of magnesium oxide and its following degradation. The latter is related to the development of internal stresses and the formation of cracks and pores within the oxide layer at prolonged exposure to high temperatures during the interaction of a laser beam with the substrate. The effect of heating during laser processing of magnesium materials with limited sizes on the protective properties of the forming coatings is elucidated.

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“…The cooling rate during solidification is the key factor that controls the values for PDAS and SDAS[5] [9]. The eutectic Al-Si structure as well as pure silicon particles are formed in the liquid surrounding the dendrite structure.Figure 2-3shows nucleation of the α-Al dendrites in an Al-Mg alloy[63].…”

mentioning

confidence: 99%

Milling parameters of Al-Cu and Al-Si cast alloys

Mofidi

Zedan

Samuel

et al. 2019

Int J Adv Manuf Technol

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The present study was carried out to study the machinability i.e. milling characteristics of an Al-6%Cu-0.7%Si alloy (in the as-cast, T5 and T7 aging conditions) and compare these characteristics to those of well-defined B319.0 (as-cast, T7-treated) and A356.0 (as-cast, T6-treated) alloys. Wet milling was carried out on 15 blocks prepared from each alloy using new carbide inserts for about 120m machining distance. Thirty-five blocks (12 in x 7 in x 1.5 in) were employed. The milling was carried out using a CNC Huron KX Five 5axis high speed machine. The experiment comprised the CNC machine, the blocks to be machined, a table dynamometer with piezoelectric sensors that are responsible for detecting and measuring the cutting forces, a signal amplifier and an A/D converting unit. New and dull cutting inserts were used for each alloy group. Thirteen layers of material were removed from each block, where each layer consisted of 10 paths, and the depth of cut was 1.35 mm. The results employing new inserts showed that the cutting forces for Al-Cu based alloys were not affected by the applied heat treatment. The presence of Cu in the B319.0 alloy neutralized to some extent the harmful effect of the hard Si particles. Maximum cutting forces were obtained from machining the T6-treated A356.0 alloy, due to the presence of a high density of hard eutectic silicon particles (approximately 41495 particles∕mm 2) in addition to a dense precipitation of ultra-fine Mg 2 Si particles. Thus, the 6% Cu in the Al-Cu based alloy may be considered to act as a self-lubricant, leading to much smoother finishing surfaces compared to those exhibited by B319.0 and A356.0 alloys. Similar observations were reported on the wearing of the drilling tools. In addition, after covering 120m machining distance, tiny burrs were found adhered to the outer edges of the block workpiece, whereas the burr in the case of A356.0 alloy was separated from the block.

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One-Step Preparation of Super-Hydrophobic Micro-Nano Dendrites on Al Alloy for Enhanced Corrosion Resistance

Cited by 8 publications

References 29 publications

Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

Thermally Induced Gradient of Properties on a Superhydrophobic Magnesium Alloy Surface

Milling parameters of Al-Cu and Al-Si cast alloys

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