Aluminum (Al) can be easily contaminated or damaged after exposure in damp environments, which can adversely affect its aesthetic appearance and desired functionalities. To improve its corrosion resistance, a superhydrophobic coating was fabricated on Al by electrochemical anodization followed by modification with myristic acid. The surface morphology and chemical composition were characterized by using a field emission scanning electron microscope (FESEM) with attached energy dispersive X-ray spectrum (EDS). The surface wettability, mechanical stability as well as corrosion resistance were also investigated by contact angle measuring system, sandblasting test and electrochemical measurements. The results show that the optimal Al-based superhydrophobic coating with a static water contact angle of (155.2±0.5)° and a sliding angle of (3.5±1.3)° is obtained at the anodization voltage of 20V. The corresponding corrosion current density (Icorr) is reduced by 2 orders of magnitude and the corrosion potential (Ecorr) shifts from -0.629V to -0.570V compared to the bare Al substrate, indicating excellent corrosion resistance. Besides, the as-prepared optimal Al-based superhydrophobic coating also suggests good mechanical stability.
FENG L B , CHE Y H , LIU X H , et al. Fabrication of superhydrophobic aluminium alloy surface with excellent corrosion resistance by a facile and environment-friendly method[J]. Applied Surface Science, 2013, 283 (15): 367- 374.
2
SHE Z X , LI Q , WANG Z W , et al. Novel method for controllable fabrication of a superhydrophobic CuO surface on AZ91D magnesium alloy[J]. ACS Applied Materials & Interfaces, 2012, 4 (8): 4348- 4356.
3
KUMAR D , WU X H , FU Q T , et al. Hydrophobic sol-gel coatings based on polydimethylsiloxane for self-cleaning applications[J]. Materials & Design, 2015, 86, 855- 862.
XU W J , SONG J L , SUN J , et al. Progress in fabrication and application of superhydrophobic surfaces on metal substrates[J]. Journal of Materials Engineering, 2011, (5): 93- 98.
WANG C Y , YANG W X , ZHANG H M , et al. Preparation of durable superhydrophobic surface on pure titanium substrate via low-cost route[J]. Journal of Materials Engineering, 2015, 43 (11): 13- 18.
doi: 10.11868/j.issn.1001-4381.2015.11.003
6
ZHENG S L , LI C , FU Q T , et al. Fabrication of self-cleaning superhydrophobic surface on aluminum alloys with excellent corrosion resistance[J]. Surface & Coatings Technology, 2015, 276, 341- 348.
7
LAI Y K , GAO X F , ZHANG H F , et al. Designing superhydrophobic porous nanostructures with tunable water adhesion[J]. Advanced Materials, 2009, 21 (37): 3799- 3803.
doi: 10.1002/adma.v21:37
8
ZHENG S L , LI C , FU Q T , et al. Development of stable superhydrophobic coatings on aluminum surface for corrosion-resistant, self-cleaning, and anti-icing applications[J]. Materials & Design, 2016, 93, 261- 270.
9
LAI Y K , TANG Y X , GONG J J , et al. Transparent superhydrophobic/superhydrophilic TiO2-based coatings for self-cleaning and anti-fogging[J]. Journal of Materials Chemistry, 2012, 22 (15): 7420- 7426.
doi: 10.1039/c2jm16298a
YAN Z N , CHE Y H , FENG L B , et al. Anti-icing and anti-adhesion behavior of superhydrophobic aluminum alloy surface[J]. Journal of Materials Engineering, 2015, 43 (9): 25- 29.
doi: 10.11868/j.issn.1001-4381.2015.09.005
ZENG Z Y , ZHANG Z C . Preparation and oil/water separation performance of super-hydrophobic and super-oleophilic poly divinyl benzene[J]. Journal of Materials Science and Engineering, 2015, 33 (2): 293- 297.
12
WU X H , FU Q T , KUMAR D , et al. Mechanically robust superhydrophobic and superoleophobic coatings derived by sol-gel method[J]. Materials & Design, 2016, 89, 1302- 1309.
LIAN F , WANG Z Y , ZHANG H C . Preparation of hydrophobic/superhydrophobic warship aluminium alloy surface and its durability[J]. Journal of Materials Engineering, 2015, 43 (1): 49- 53.
doi: 10.11868/j.issn.1001-4381.2015.01.009
14
YU J , QIN L , HAO Y F , et al. Vertically aligned boron nitride nanosheets:chemical vapor synthesis, ultraviolet light emission, and superhydrophobicity[J]. ACS Nano, 2010, 4 (1): 414- 422.
doi: 10.1021/nn901204c
15
SHEN Y Z , TAO H J , CHEN S L , et al. Icephobic/anti-icing potential of superhydrophobic Ti6Al4V surfaces with hierarchical textures[J]. RSC Advances, 2015, 5 (3): 1666- 1672.
doi: 10.1039/C4RA12150C
16
QIAN B T , SHEN Z Q . Fabrication of superhydrophobic surfaces by dislocation-selective chemical etching on aluminum, copper, and zinc substrates[J]. Langmuir, 2005, 21 (20): 9007- 9009.
doi: 10.1021/la051308c
17
KANNARPADY G K , KHEDIR K R , ISHIHARA H , et al. Controlled growth of self-organized hexagonal arrays of metallic nanorods using template-assisted glancing angle deposition for superhydrophobic applications[J]. ACS Applied Materials & Interfaces, 2011, 3 (7): 2332- 2340.
18
GANESH V A , NAIR A S , RAUT H K , et al. Superhydrophobic fluorinated POSS-PVDF-HFP nanocomposite coating on glass by electrospinning[J]. Journal of Materials Chemistry, 2012, 22 (35): 18479- 18485.
doi: 10.1039/c2jm33088a
19
DONG C S , GU Y , ZHONG M L , et al. Fabrication of superhydrophobic Cu surfaces with tunable regular micro and random nano-scale structures by hybrid laser texture and chemical etching[J]. Journal of Materials Processing Technology, 2011, 211 (7): 1234- 1240.
doi: 10.1016/j.jmatprotec.2011.02.007
20
YIN B , FANG L , HU J , et al. A facile method for fabrication of superhydrophobic coating on aluminum alloy[J]. Surface and Interface Analysis, 2012, 44 (4): 439- 444.
doi: 10.1002/sia.v44.4
21
THIEME M , FRENZEL R , SCHMIDT S , et al. Generation of ultrahydrophobic properties of aluminium-a first step to self-cleaning transparently coated metal surfaces[J]. Advanced Engineering Materials, 2001, 3 (9): 691- 695.
doi: 10.1002/1527-2648(200109)3:9<691::AID-ADEM691>3.0.CO;2-8
22
BARKHUDAROV P M , SHAH P B , WATKINS E B , et al. Corrosion inhibition using superhydrophobic films[J]. Corrosion Science, 2008, 50 (3): 897- 902.
doi: 10.1016/j.corsci.2007.10.005
23
HAN J K , KIM J , CHOI Y C , et al. Structure of alumina nanowires synthesized by chemical etching of anodic alumina membrane[J]. Physica E, 2007, 36 (2): 140- 146.
doi: 10.1016/j.physe.2006.10.003
24
XIAO Z L , HAN C Y , WELP U , et al. Fabrication of alumina nanotubes and nanowires by etching porous alumina membranes[J]. Nano Letters, 2002, 2 (11): 1293- 1297.
doi: 10.1021/nl025758q
25
LI Y , LING Z Y , CHEN S S , et al. Novel AAO films and hollow nanostructures fabricated by ultra-high voltage hard anodization[J]. Chemical Communications, 2010, 46 (2): 309- 311.
doi: 10.1039/B914703A
26
PENG S , DONG T , YANG X J , et al. Highly efficient and large-scale fabrication of superhydrophobic alumina surface with strong stability based on self-congregated alumina nanowires[J]. ACS Applied Materials & Interfaces, 2014, 6 (7): 4831- 4841.
27
LI S Y , WANG J , LI Y , et al. Photoluminescent properties of anodic aluminum oxide films formed in a mixture of malonic and sulfuric acid[J]. Superlattices and Microstructures, 2014, 75, 294- 302.
doi: 10.1016/j.spmi.2014.07.018
28
WANG J Y , LI C , YIN C Y , et al. Ultrasmall nanopores obtained by electric field enhanced one-step anodisation of aluminium alloy[J]. Surface & Coatings Technology, 2014, 258, 615- 623.
29
TAO Y T . Structural comparison of self-assembled monolayers of n-alkanoic acids on the surfaces of silver, copper, and aluminum[J]. Journal of the American Chemical Society, 1993, 115 (10): 4350- 4358.
doi: 10.1021/ja00063a062
30
YIN Y S , LIU T , CHEN S G , et al. Structure stability and corrosion inhibition of super-hydrophobic film on aluminum in seawater[J]. Applied Surface Science, 2008, 255 (5): 2978- 2984.
doi: 10.1016/j.apsusc.2008.08.088
31
CASSIE A B D , BAXTER S . Wettability of porous surfaces[J]. Transactions of the Faraday Society, 1944, 40, 546- 551.
doi: 10.1039/tf9444000546
32
XU W J , SONG J L , SUN J , et al. Rapid fabrication of large-area, corrosion-resistant superhydrophobic Mg alloy surfaces[J]. ACS Applied Materials & Interfaces, 2011, 3 (11): 4404- 4414.
2017, Vol. 45 
), 项腾飞, 胡玮, 丁诗炳, 王晶, 刘盼金
