Super-hydrophobic surface treatment as corrosion protection for aluminum in seawater

He, Tieshi; Wang, Yuanchao; Zhang, Yi-Jian; Lv, Qun; Xu, Tugen; Liu, Tao

doi:10.1016/j.corsci.2009.04.027

Cited by 177 publications

(66 citation statements)

References 12 publications

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“…Experiments performed by Vengatesh and Kulandainathan with a 30-min immersion before polarization show that the corrosion current varies between 2 and 1050 nA/cm 2 , depending on the passivated molecules [15]. Moreover, in the study of He et al, a 1-h immersion time is used for the stabilization [21]. In our experiment, the samples were exposed to NaCl solution for 20 h to stabilize under OCP.…”

Section: Sem Images Inmentioning

confidence: 99%

Fabrication of Corrosion Resistance Micro-Nanostructured Superhydrophobic Anodized Aluminum in a One-Step Electrodeposition Process

Huang

Sarkar

Chen

2016

Metals

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Abstract:The formation of low surface energy hybrid organic-inorganic micro-nanostructured zinc stearate electrodeposit transformed the anodic aluminum oxide (AAO) surface to superhydrophobic, having a water contact angle of 160˝. The corrosion current densities of the anodized and aluminum alloy surfaces are found to be 200 and 400 nA/cm 2 , respectively. In comparison, superhydrophobic anodic aluminum oxide (SHAAO) shows a much lower value of 88 nA/cm 2 . Similarly, the charge transfer resistance, R ct , measured by electrochemical impedance spectroscopy shows that the SHAAO substrate was found to be 200-times larger than the as-received aluminum alloy substrate. These results proved that the superhydrophobic surfaces created on the anodized surface significantly improved the corrosion resistance property of the aluminum alloy.

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Section: Sem Images Inmentioning

confidence: 99%

Fabrication of Corrosion Resistance Micro-Nanostructured Superhydrophobic Anodized Aluminum in a One-Step Electrodeposition Process

Huang

Sarkar

Chen

2016

Metals

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“…34,105,106 Figures 14a-14c shows the typical equivalent circuits describing the electrochemical process on superhydrophobic surfaces. 27,29,30,34,60,62,106,[110][111][112][113][114] In many cases, they can be simply replaced by Fig. 14d because of the highly insulating property of the superhydrophobic surface.…”

Section: Mechanistic Aspectsmentioning

confidence: 99%

“…[62][63][64][65][66][67][68][69] Stable superhydrophobic films were prepared by anodization of titanium and subsequent immersion in a methanol solution of hydrolyzed PFOTES (Fig. 5).…”

Section: Anodizationmentioning

confidence: 99%

Superhydrophobic surfaces for corrosion protection: a review of recent progresses and future directions

et al. 2015

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Due to their superior water-repelling effects, superhydrophobic surfaces have received increasing attention as a promising solution to corrosion of metallic materials. The present article introduces the fundamental theories behind superhydrophobicity followed by a comprehensive review of the recent progresses of this rapidly growing field over the past 5 years. A critical discussion over anticorrosion mechanisms of superhydrophobic surfaces is also provided. For many realistic applications, future efforts are pressingly demanded to prolong the corrosion resistance of these superhydrophobic surfaces. To this end, several important strategies and examples in designing stable, selfhealable, or inhibitor-loaded superhydrophobic surfaces are discussed.

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“…The C dl and C s are the ideal capacitors for passive layer and substrate/passive layer interface, respectively. Indeed, the capacitance shows the amount of electric charge stored on the surface immersed in the electrolyte and is usually used instead of the capacitance or the double layer between the charged metal surface and the solution in electrochemical processes [51]. The capacitive components (C dl and R 1 ) are mainly attributed to the double-layer capacitance and the inductive components (C s and R 2 ) usually originate from the dissolution and formation of the corrosion product layer at vulnerable regions.…”

Section: Resultsmentioning

confidence: 99%

Significant Corrosion Resistance in an Ultrafine-Grained Al6063 Alloy with a Bimodal Grain-Size Distribution through a Self-Anodic Protection Mechanism

Oskooie

Asgharzadeh

Sadighikia

et al. 2016

Metals

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Abstract:The bimodal microstructures of Al6063 consisting of 15, 30, and 45 vol. % coarse-grained (CG) bands within the ultrafine-grained (UFG) matrix were synthesized via blending of high-energy mechanically milled powders with unmilled powders followed by hot powder extrusion. The corrosion behavior of the bimodal specimens was assessed by means of polarization, steady-state cyclic polarization and impedance tests, whereas their microstructural features and corrosion products were examined using optical microscopy (OM), scanning transmission electron microscopy (STEM), field emission scanning electron microscopy (FE-SEM), electron backscattered diffraction (EBSD), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) techniques. The bimodal Al6063 containing 15 vol. % CG phase exhibits the highest corrosion resistance among the bimodal microstructures and even superior electrochemical behavior compared with the plain UFG and CG materials in the 3.5% NaCl solution. The enhanced corrosion resistance is attributed to the optimum cathode to anode surface area ratio that gives rise to the formation of an effective galvanic couple between CG areas and the UFG matrix. The operational galvanic coupling leads to the domination of a "self-anodic protection system" on bimodal microstructure and consequently forms a uniform thick protective passive layer over it. In contrast, the 45 vol. % CG bimodal specimen shows the least corrosion resistance due to the catastrophic galvanic corrosion in UFG regions. The observed results for UFG Al6063 suggest that metallurgical tailoring of the grain structure in terms of bimodal microstructures leads to simultaneous enhancement in the electrochemical behavior and mechanical properties of passivable alloys that are usually inversely correlated. The mechanism of self-anodic protection for passivable metals with bimodal microstructures is discussed here for the first time.

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Super-hydrophobic surface treatment as corrosion protection for aluminum in seawater

Cited by 177 publications

References 12 publications

Fabrication of Corrosion Resistance Micro-Nanostructured Superhydrophobic Anodized Aluminum in a One-Step Electrodeposition Process

Fabrication of Corrosion Resistance Micro-Nanostructured Superhydrophobic Anodized Aluminum in a One-Step Electrodeposition Process

Superhydrophobic surfaces for corrosion protection: a review of recent progresses and future directions

Significant Corrosion Resistance in an Ultrafine-Grained Al6063 Alloy with a Bimodal Grain-Size Distribution through a Self-Anodic Protection Mechanism

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