scholarly journals Synergistic Effect of Superhydrophobicity and Oxidized Layers on Corrosion Resistance of Aluminum Alloy Surface Textured by Nanosecond Laser Treatment

2015 ◽  
Vol 7 (34) ◽  
pp. 19500-19508 ◽  
Author(s):  
Ludmila B. Boinovich ◽  
Alexandre M. Emelyanenko ◽  
Alexander D. Modestov ◽  
Alexandr G. Domantovsky ◽  
Kirill A. Emelyanenko
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Synergistic Effect ◽  
Laser Treatment ◽  
Alloy Surface ◽  
Nanosecond Laser ◽  
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.

scholarly journals Investigation on the Surface Properties of 5A12 Aluminum Alloy after Nd: YAG Laser Cleaning

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 578 ◽  
Author(s):  
Guodong Zhu ◽  
Shouren Wang ◽  
Wei Cheng ◽  
Gaoqi Wang ◽  
Wentao Liu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Laser Cleaning ◽  
Alloy Surface ◽  
Residual Tensile Stress ◽  
Yag Laser ◽  
Diode Pumped ◽  
Aluminum Alloy Surface ◽  
Diode Pumped Nd:Yag Laser

The surface of the aluminum alloy is prone to oxidation, which in turn affects the quality of the weld. The 5A12 aluminum alloy was cleaned by acousto-optic Q-switched diode-pumped Nd:YAG laser and the effects of different laser powers and different cleaning speeds on the surface roughness, microstructure, element content, microhardness, residual stress and corrosion resistance of aluminum alloy were investigated. The results show that when the power is 98W and the cleaning speed is 4.1 mm/s, the effect of Nd: YAG laser on the removal of oxide film on 5A12 aluminum alloy surface is the most effective. After laser cleaning, the smoothness and strength of aluminum alloy surface can be effectively improved. However, as a major element in 5A12 aluminum alloy, the content of magnesium decreased. At the same time, the residual tensile stress was generated on the surface of the aluminum alloy after cleaning, and the corrosion resistance slightly decreased.

scholarly journals Adhesion and Corrosion Resistance of Micro-Arc Oxidation/Polyurethane Composite Coating on Aluminum Alloy Surface

2020 ◽  
Vol 10 (19) ◽  
pp. 6779
Author(s):  
Ruitao Wang ◽  
Hong Xu ◽  
Zhongping Yao ◽  
Chunxiang Li ◽  
Zhaohua Jiang
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Composite Coating ◽  
Sodium Silicate ◽  
Adhesion Strength ◽  
Waterborne Polyurethane ◽  
Alloy Surface ◽  
Polyurethane Composite ◽  
Micro Arc Oxidation ◽  
Aluminum Alloy Surface

The adhesion and bonding performance of waterborne polyurethane (PU) coating on aluminum alloy surface was improved in this study. To achieve this objective, the effects of different sodium silicate concentrations on the aluminum alloy micro-arc oxidation (MAO) layer and the adhesion strength and corrosion resistance of MAO-PU composite coating before and after modification by MAO treatment of the 7050 aluminum alloy were studied. The experimental results showed that the modification of the MAO membrane layer by a silane coupling agent could significantly improve the adhesion strength and corrosion resistance of the composite coating. Moreover, the maximum adhesion strength was obtained when the concentration of sodium silicate was 12 g L−1.

Low-cost and large-scale fabrication of a superhydrophobic 5052 aluminum alloy surface with enhanced corrosion resistance

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29639-29646 ◽  
Author(s):  
Xue-Wu Li ◽  
Qiao-Xin Zhang ◽  
Zheng Guo ◽  
Jin-Gui Yu ◽  
Ming-Kai Tang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Corrosion Inhibition ◽  
Large Scale ◽  
Low Cost ◽  
Alloy Surface ◽  
Acid Etching ◽  
Scale Structures ◽  
Passivation Treatment ◽  
Aluminum Alloy Surface

Through a simple and low-cost acid etching and passivation treatment, hierarchical micro/nano-scale structures with enhanced corrosion inhibition behaviors have been fabricated on the 5052 aluminum alloy surface.

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