JOM
·
2023
·Vol. 75
·期 9
·3353-3364
·
IF 2.6
Jia Wenhu,Cao Huaijie,Zeng Yanwei,Chen Xiaohang,Xu Qunjie
Anticorrosive coatings for corrosion protection on aluminum alloy remain challenges in high protection efficiency and stability with facile design. Here, a stable superhydrophobic film is successfully prepared on 5052 aluminum alloy (AA5052) by electrodeposition to enhance its corrosion resistance in 3.5 wt% NaCl solution. The contact angle reaches 157° at the electrodeposition voltage of 10 V. Electrochemical tests confirm that it can serve as a highly effective and stable coating for corrosion protection with an inhibition efficiency ( η ) of 99.1%. The charge transfer resistance of the coated Al alloy increases remarkably from 8.955 kΩ cm 2 to 366.1 kΩ cm 2 . Besides, the superhydrophobic surface shows good stability when it is exposed to air and NaCl solution for a long time. After immersion for 12 days in 3.5 wt% NaCl solution, the superhydrophobic coating still exhibits a low corrosion current density of 3.309 × 10 -7 A/cm 2 . The synergy effects of the superhydrophobicity and the Ce 3+ endow the coating with remarkably enhancing corrosion resistance. This facile strategy can provide new ideas for designing highly effective and stable anti-corrosion coatings on aluminum alloy.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yang Li,Chunting Guo,Caixia Qi,Dejian Zhang,Huilai Sun,Shuyan Yang,Yong Wan,Yanshuang Wang
Although the formation of plasma electrolytic oxidation (PEO) coatings on aluminum alloys can significantly enhance their service life, they may still suffer from corrosion damage when exposed to harsh environments with strong corrosivity for a long time. In this work, chitosan (CS) was dissolved in four acids, i.e. hydrochloric acid (HCl), citric acid (CA), lactic acid (LA), and acetic acid (HAc), and deposited onto the PEO-coated 5052 aluminum alloy using dip coating method. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS), atomic force microscope (AFM), contact angle (CA) meter, grazing incidence X-ray diffraction (GIXRD), Fourier transform infrared spectrometer (FTIR), and electrochemical workstation system were used to explore the enhancement of the corrosion resistance of PEO-coated 5052 aluminum alloy by application of CS film prepared in different solvent acids. The results showed that the interactions between chitosan and acid ions affects the uniformity, hydrophobicity , thickness and surface roughness of the CS/PEO coating. The HAc-CS/PEO coating had the lowest surface roughness of 32.4 ± 3.9 nm, the largest contact angle of 85.7 ± 2.0°, and the thickest CS film of 20 μm, which significantly improved corrosion resistance of PEO-coated aluminum alloy.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Fang Wang,Yanni Li,Qian Wang,Yabin Wang
Poly (6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol) nanofilm (PDB) were prepared by electropolymerization of 6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) on an aluminum alloy (AA5052) surface. Cyclic voltammetry was used to study the electrochemical polymerization mechanism and the growth process. X-ray photoelectron spectroscopy (XPS) was utilized to identify the structure of PDB. Then, the PDB nanofilm covered surface was silanized in hydrolyzed hexadecyltrimethoxysilane (HDTMS) solution to fabricate the composite polymeric nanofilms (CPDB) by self-assembled technique. The formation mechanism of CPDB was that HDTMS reacted with AA5052 surface which was not adequately covered by PDB nanofilm. The composite polymeric nanofilms were characterized by means of XPS, scanning electron microscope (SEM), contact angle, potentiodynamic polarization and immersion test in 5% NaCl solution. The results showed that CPDB was homogenous, compact, hydrophobic and also had an excellent protection efficiency.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 126
·104451-104457
·
IF 3.84
Zhen Li,Benye Qin,Xiaoyong Zhang,Ke Wang,Yen Wei,Yan Ji
Polymers of intrinsic microporosity (PIMs) combine both advantages of microporous structure and good processability. In this paper, we demonstrate the potential use of PIM1 in self-healable anti-corrosion coatings for aluminum alloy 2024 (AA2024). Before the AA2024 is coated by commercial top paint, it is dip coated by a solution containing corrosion inhibitor benzotriazole (BTA) and PIM1. As the solvent evaporates, a BTA loaded PIM1 film forms. It is shown that BTA can be sustainably released, especially when damage occurs. This novel coating system exhibits notable improvement in the corrosion resistance of AA2024.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Guo Xin,Wang Jinke,Huang Luyao,Wang Yajie,Ma Li,Zhang Dawei,Ma Lingwei
The corrosion inhibition effect of 3-amino-5-mercapto-1,2,4-triazole (AMT) on AA2024 aluminium alloy in 3.5 wt.% NaCl solution was investigated, and the corrosion inhibition mechanism was revealed. The influence of AMT concentration on the corrosion inhibition performance was evaluated by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS). Surface analysis and surface-enhanced Raman scattering (SERS) spectra were used to study the adsorption process and corrosion inhibition mechanism of AMT on the alloy surface. Polarization curve and EIS results showed that when the AMT concentration was 1.5 g/L, the corrosion current density (icorr) was the lowest and the resistance of adsorption film (Rf) was the largest, illustrating the highest corrosion inhibition efficiency. Moreover, the adsorption kinetics process of AMT was revealed by SERS measurement, and a positive correlation between the SERS intensity and Rf values of AMT after different immersion time was achieved. It indicated that the efficient adsorption of corrosion inhibitors significantly enhanced the corrosion inhibition performance. Density functional theory (DFT) and molecular dynamics simulations were used to give further insight into the adsorption and inhibition mechanism of AMT on the aluminium alloy surface.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Anhang Li,Sifan Chen,Zhidong Ma,Min Sun,Guiyu Zhu,Yue Zhang,Wei Wang
In this study, polyaniline-graphene oxide (PANI-GO) composites with different loading amounts of GO (2 wt%, 4 wt%, 8 wt%) were successfully synthesized by a facile in-situ polymerization method. PANI-GO was added into polyvinyl butyral (PVB) primer to prepare anticorrosive coating for AA2024 aluminum alloy. Poly (methylhydrosiloxane) (PMHS) was introduced to improve the crosslinking degree and hydrophobicity of the composite coating . PANI-GO composites were characterized by UV–visible spectral, Fourier transform infrared spectroscopy and X-ray diffraction. The morphologies of different composites and coatings were characterized by scanning electron microscopy and transmission electron microscope . The anticorrosion performances of composite coatings were investigated by electrochemical impedance spectroscopy and Tafel polarization in 3.5 wt% NaCl solution under room temperature. Results showed that PVB/PANI-GO 20/PMHS coating exhibited much better protection properties to the substrate compared with PVB coating, the |Z| 0.01Hz of the former reached 1.0 × 10 8 Ω·cm 2 , which is almost 3 orders higher than PVB coating, and I corr decreased to 5.88 × 10 −9 A·cm 2 . With the hydrophobic surface formed by PMHS, the coating contact angle reached 104.52 ± 1.52°, and the long-term corrosion protection to the aluminum could last for over 70 days.
研究领域:
材料科学
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
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