scholarly journals Polymeric Organo-Silane Coatings for Aluminum Alloy Corrosion Protection by Self-Assembled Metho

2012 ◽  
Vol 9 (1) ◽  
pp. 435-442 ◽  
Author(s):  
Yabin Wang ◽  
Yanni Li ◽  
Fang Wang
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Electrochemical Techniques ◽  
Aluminum Surface ◽  
Corrosion Resistant ◽  
Hot Air ◽  
Self Assembling ◽  
Defective Layer ◽  
Self Assembled ◽  
Aluminum Alloy Surface

The protective performances of coating formed by organo-silane with a linear alkyl chain for promoting aluminum alloy corrosion protection were evaluated by electrochemical techniques. The coatings were self-assembled in the hydrolyzed hydroalcoholic bath ofn-octyltriethoxysilane (OS) and cured at hot air oven by different time. The coatings prepared by the less self-assembled number and shorter cured time, were always porous and scarcely protective. On the contrary, those built by the more self-assembled number and the longer cured time had higher coverage on aluminum surface and favorable corrosion resistant property. The best results were obtained whenn-octyltri-ethoxysilane (OS) was hydrolyzed 25 h, self-assembling of OS was conducted for five times and the multi-layers were cured at 120 for 1∼2 hours. In this case, the thicker, high cross-linked and more scarcely defective layer was formed on aluminum alloy surface.

scholarly journals Fabrication of Superhydrophobic AA5052 Aluminum Alloy Surface with Improved Corrosion Resistance and Self Cleaning Property

Coatings ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 390 ◽  
Author(s):  
Qian Zhao ◽  
Tiantian Tang ◽  
Fang Wang
Keyword(s):  
Contact Angle ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Materials Science ◽  
Composite Coatings ◽  
Alloy Surface ◽  
Corrosion Resistant ◽  
Self Cleaning ◽  
Aa5052 Aluminum Alloy ◽  
Aluminum Alloy Surface

The development of a self-cleaning and corrosion resistant superhydrophobic coating for aluminum alloy surfaces that is durable in aggressive conditions has attracted great interest in materials science. In the present study, a superphydrophobic film was fabricated on an AA5052 aluminum alloy surface by the electrodeposition of Ni–Co alloy coating, followed by modification with 6-(N-allyl-1,1,2,2-tetrahydro-perfluorodecyl) amino-1,3,5-triazine-2,4-dithiol monosodium (AF17N). The surface morphology and characteristics of the composite coatings were investigated by means of scanning electron microscopy (SEM), energy dispersive X-ray spectrum (EDS), atomic force microscope (AFM) and contact angle (CA). The corrosion resistance of the coatings was assessed by electrochemical tests. The results showed that the surface exhibited excellent superhydrophobicity and self-cleaning performance with a contact angle maintained at 160° after exposed to the atmosphere for 240 days. Moreover, the superhydrophobic coatings significantly improved the corrosion resistant performance of AA5052 aluminum alloy substrate in 3.5 wt.% NaCl solution.

Corrosion inhibition of AA3003 aluminum alloy by self-assembled layers of myristic acid

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
María V. Puc-Oxté ◽  
Máximo A. Pech-Canul
Keyword(s):  
Photoelectron Spectroscopy ◽  
Myristic Acid ◽  
Electrochemical Techniques ◽  
Aluminum Surface ◽  
Protective Efficiency ◽  
Water Contact ◽  
Protection Efficiency ◽  
Content Type ◽  
Self Assembled ◽  
Highly Hydrophobic

Purpose This paper aims to prepare highly hydrophobic films on aluminum AA3003 using myristic acid (MA) and evaluate its corrosion protection efficiency in a low-chloride solution. Design/methodology/approach The aluminum surface was initially treated with boiling water to develop a porous nanostructure, and then surface modification was carried out in ethanolic solutions with different concentrations of MA. The surface morphology, wetting behavior and film composition were first characterized, and then, the corrosion behavior was evaluated with electrochemical techniques. Findings The best hydrophobicity and corrosion resistance were obtained with 50 mM of MA. For such concentration, a water contact angle of 140° and protective efficiency of 96% were achieved. A multilayer structure was revealed by scanning electron microscope and X-ray photoelectron spectroscopy. Originality/value The results of this work shed light on the anticorrosion performance of fatty acid self-assembled multilayers on the surface of Al–Mn alloys.

scholarly journals Superhydrophobic Self-Assembled Silane Monolayers on Hierarchical 6082 Aluminum Alloy for Anti-Corrosion Applications

2020 ◽  
Vol 10 (8) ◽  
pp. 2656 ◽  
Author(s):  
Amani Khaskhoussi ◽  
Luigi Calabrese ◽  
Edoardo Proverbio
Keyword(s):  
Aluminum Alloy ◽  
Surface Energy ◽  
High Water ◽  
Dip Coating ◽  
Aluminum Surface ◽  
Sliding Angle ◽  
Water Contact ◽  
Electrochemical Tests ◽  
Self Assembled ◽  
6082 Aluminum Alloy

In this work, a two-stage methodology to design super-hydrophobic surfaces was proposed. The first step consists of creating a rough nano/micro-structure and the second step consists of reducing the surface energy using octadecyltrimethoxysilane. The surface roughening was realized by three different short-term pretreatments: (i) Boiling water, (ii) HNO3/HCl etching, or (iii) HF/HCl etching. Then, the surface energy was reduced by dip-coating in diluted solution of octadecyltrimethoxysilane to allow the formation of self-assembled silane monolayers on a 6082-T6 aluminum alloy surface. Super-hydrophobic aluminum surfaces were investigated by SEM-EDS, FTIR, profilometry, and contact and sliding angles measurements. The resulting surface morphologies by the three approaches were structured by a dual hierarchical nano/micro-roughness. The surface wettability varied with the applied roughening pretreatment. In particular, an extremely high water contact angle (around 180°) and low sliding angle (0°) were evidenced for the HF/HCl-etched silanized surface. The results of electrochemical tests demonstrate a remarkable enhancement of the aluminum alloy corrosion resistance through the proposed superhydrophobic surface modifications. Thus, the obtained results evidenced that the anti-wetting behavior of the aluminum surface can be optimized by coupling an appropriate roughening pretreatment with a self-assembled silane monolayer deposition (to reduce surface energy) for anticorrosion application.

Facile formation of superhydrophobic aluminum alloy surface and corrosion-resistant behavior

2016 ◽  
Vol 122 (3) ◽  
Author(s):  
Libang Feng ◽  
Zhongna Yan ◽  
Xiaohu Qiang ◽  
Yanhua Liu ◽  
Yanping Wang
Keyword(s):  
Aluminum Alloy ◽  
Alloy Surface ◽  
Corrosion Resistant ◽  
Aluminum Alloy Surface

scholarly journals The research of interaction of zinc solders with aluminum alloys during friction application

2020 ◽  
pp. 58-66
Author(s):  
E. O. Shargaev ◽  
◽  
I. N. Pashkov ◽  
Keyword(s):  
Aluminum Alloy ◽  
Metal Surface ◽  
Base Metal ◽  
Aluminum Surface ◽  
Pressing Method ◽  
Spreading Area ◽  
Cu Content ◽  
Aluminum Surfaces ◽  
Aluminum Alloy Surface ◽  
Liquidus Temperatures

Nowadays, due to the search for more efficient and steady processes of aluminum combination and the products that cannot be manufactured using flux, the issue of application of flux-free soldering methods for aluminum-based alloys is highly relevant. The lack of the description of the processes and mechanisms of flux-free soldering by the technique of friction of the solder on the aluminum surface makes it urgent to study and describe them in detail. To carry out the study, the authors produced zinc-based alloys and prepared solder rods using the hot pressing method. Using the technique of friction of a rod against the surface of the heated aluminum substrate, the authors identified minimum temperatures of the setting of zinc solders of different compositions with aluminum surfaces. The experiment proves that these temperatures correlate with the liquidus temperatures of these alloys and have similar values. The dependence of minimum setting temperatures on the Al and Cu content in the solder was obtained. The authors studied the influence of the state of the base metal surface on the spreading area of the Zn-4%Al zinc solder during friction application. The experiments determined the zones of solder spreading over the surface of the AD31 aluminum alloy substrate, depending on the roughness of the base metal surface. The study identified that minimum setting temperatures of solders have similar values against the liquidus temperatures of these alloys, and the adding of copper to a solder reduces these temperatures, on average, by 20° С per each percent of added copper. The flowing of Zn–4%Al solder over the AD31 aluminum alloy surface reaches the largest values when treating the surface with rough-grain abrasive cloths, and the flowing effect decreases with the decrease in roughness.

scholarly journals Corrosion protection in sulfate medium by self-assemb films adsorbed on AA 2024 T3 aluminum alloy surface

2015 ◽  
Vol 20 (2) ◽  
pp. 420-435
Author(s):  
Aline Viomar ◽  
Maysa Terada ◽  
Isolda Costa ◽  
Paulo Rogério Pinto Rodrigues ◽  
Claudia Schlindwein ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Alloy Surface ◽  
Aa 2024 ◽  
Sulfate Medium ◽  
Aluminum Alloy Surface

Nanostructured surface pre-treatment based on self-assembled molecules for corrosion protection of Alclad 7475-T761 aluminum alloy

2011 ◽  
Vol 62 (10) ◽  
pp. 913-919 ◽  
Author(s):  
S. de Souza ◽  
D. S. Yoshikawa ◽  
W. A. S. Izaltino ◽  
S. L. Assis ◽  
I. Costa
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Nanostructured Surface ◽  
Self Assembled ◽  
Pre Treatment
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