Research on Properties and Formation Mechanism of Ceramic Coatings Prepared by Micro-Arc Oxidation on 2024 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.

Download Full-text

Measurement of laser-induced dynamic strain on 2024 aluminum alloy surface

High Power Laser and Particle Beams ◽

10.3788/hplpb20132504.0872 ◽

2013 ◽

Vol 25 (4) ◽

pp. 872-874 ◽

Cited By ~ 1

Author(s):

冯爱新 Feng Aixin ◽

施芬 Shi Fen ◽

韩振春 Han Zhenchun ◽

薛伟 Xue Wei ◽

李彬 Li Bin ◽

...

Keyword(s):

Aluminum Alloy ◽

Alloy Surface ◽

Dynamic Strain ◽

2024 Aluminum Alloy ◽

Aluminum Alloy Surface

Download Full-text

Research on Properties and Formation Mechanism of Ceramic Coatings Prepared by Micro-Arc Oxidation on 2024 Aluminum Alloy Surface

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.315-316.259 ◽

2006 ◽

Vol 315-316 ◽

pp. 259-263 ◽

Cited By ~ 4

Author(s):

Wan Sheng Zhao ◽

T.Z. Xin ◽

Zhen Long Wang ◽

J.C. Liu

Keyword(s):

Phase Composition ◽

Ceramic Coatings ◽

High Energy ◽

High Energy Density ◽

Alloy Surface ◽

Al Alloy ◽

X Ray Diffraction ◽

2024 Aluminum Alloy ◽

Micro Arc Oxidation ◽

Coating Formation

In this paper, ceramic coatings prepared on 2024 Al alloy surface in electrolyte by micro-arc oxidation are studied. The parameter of discharge and rate of ceramic coating formation are investigated. We analyzed microstructure and phase composition of the coatings by scanning electronic microscopy (SEM) and X-ray diffraction (XRD), and studied the tribological performance of the coatings. The reactions on the electrode surface are deduced and the mechanism of coating formation has been analyzed. The results show that the relation between the thickness and reaction time is not linear. The ceramic coatings contain phase γ-Al2O3 andα-Al2O3; there is a big difference in contents of phase composition between inner coating and outer coating due to the different cooling rates of them. In MAO process, the coating undergoes a course of melting, solidifying and cooling. The coating can be divided into three layers, namely, transition layer, compact layer, and loose layer. The coating and substrate adheres firmly by a metallurgical process. Not only the elements of electrolyte (K, Si) and substrate (Cu) are found in the coatings but also the element of cathode (Fe). The Si-Al-O complex compound is formed in the discharge channels under high energy density condition.

Download Full-text

Characteristics of Nanosecond Pulse Laser Cleaning Paint Coatings on 2024 Aluminum Alloy Surface

Laser & Optoelectronics Progress ◽

10.3788/lop202158.0514001 ◽

2021 ◽

Vol 58 (5) ◽

pp. 0514001-514001167

Author(s):

邱太文 Qiu Taiwen ◽

易俊兰 Yi Junlan ◽

程程 Cheng Cheng ◽

孙浩然 Sun Haoran ◽

田泽 Tian Ze ◽

...

Keyword(s):

Aluminum Alloy ◽

Pulse Laser ◽

Laser Cleaning ◽

Nanosecond Pulse ◽

Alloy Surface ◽

2024 Aluminum Alloy ◽

Nanosecond Pulse Laser ◽

Paint Coatings ◽

Aluminum Alloy Surface

Download Full-text

In situ growth of hierarchical boehmite on 2024 aluminum alloy surface as superhydrophobic materials

RSC Advances ◽

10.1039/c4ra00160e ◽

2014 ◽

Vol 4 (28) ◽

pp. 14708-14714 ◽

Cited By ~ 34

Author(s):

Zhijie Wang ◽

Jinghua Gong ◽

Jinghong Ma ◽

Jian Xu

Keyword(s):

Aluminum Alloy ◽

Alloy Surface ◽

In Situ Growth ◽

2024 Aluminum Alloy ◽

Lotus Leaf ◽

Aluminum Alloy Surface

Super-hydrophobic lotus leaf like surface has been fabricated via growth of flower-like boehmite on 2024 aluminum alloy surface and subsequent POTS modification.

Download Full-text

The protection of TDPA deposited from mixed solutions with different water/ethanol ratios for aluminum alloy against corrosion in NaCl solution

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-09-2015-1576 ◽

2017 ◽

Vol 64 (2) ◽

pp. 233-240 ◽

Cited By ~ 1

Author(s):

Qu Jun-e ◽

Chen Geng ◽

Wang Hai-ren ◽

Cao Zhi-yong

Keyword(s):

Aluminum Alloy ◽

Water Content ◽

Corrosion Protection ◽

Corrosion Inhibition ◽

Adsorption Behavior ◽

Alloy Surface ◽

Nacl Solution ◽

2024 Aluminum Alloy ◽

Content Type ◽

Aluminum Alloy Surface

Purpose The purpose of this paper is to investigate the effect of water content of assembly solution on the adsorption behavior and corrosion protection performance of 1–tetradecylphosphonic acid [TDPA, CH3(CH2)13P(O)(OH)2] films on aluminum alloy surface in NaCl solution. Design/methodology/approach Self-assembled monolayers (SAMs) of TDPA were prepared on the 2024 aluminum alloy surface in TDPA containing ethanol-water solutions with different water contents. The adsorption behavior of the SAMs on the alloy surface and their corrosion protection properties in a 3.5 per cent NaCl solution were characterized by potentiodynamic polarization scan, Fourier-transformed infrared spectroscopy (FTIR) and atomic force microscopy (AFM). Findings The FTIR results demonstrated that the TDPA molecules were successfully adsorbed on the 2024 aluminum alloy surface, and the density of the SAMs increased with the increasing water content in the assembly solution. The electrochemical studies and corrosion morphologies observed by AFM showed that the optimal condition is 2 h of assembling in solution B or solution C. The corrosion inhibition efficiency values follow the order solution B ≈ solution C > solution A at the first 2 h assembly and solution B > solution C > solution A while the assembly time exceeded 2 h. The dependence of corrosion inhibition performance of the SAM on the water content and on the assembly time is related to the balancing of competition between TDPA adsorption and dissolution of the alloy oxidation film. Originality/value It illustrates potential application prospects of TDPA for surface treatment of aluminum alloy. Via the comparison with our previous work, this paper provides useful information regarding the difference of corrosion inhibition properties of organic phosphonic acid for aluminum alloy between in neutral and in acid solution.

Download Full-text

Investigation on the aluminum-alloy surface with micro-pits array generating by through double mask electrochemical machining

Future Energy, Environment and Materials II ◽

10.2495/feem140511 ◽

2015 ◽

Author(s):

Shuangqing Qian ◽

Feng Ji

Keyword(s):

Aluminum Alloy ◽

Electrochemical Machining ◽

Alloy Surface ◽

Mask Electrochemical Machining ◽

Aluminum Alloy Surface

Download Full-text

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

Coatings ◽

10.3390/coatings8110390 ◽

2018 ◽

Vol 8 (11) ◽

pp. 390 ◽

Cited By ~ 4

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.

Download Full-text