JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ying Wang,Niumeng Huang,Yan Zhang,Lin Liu,Xiaobing Zhao,Ya Yang,Ningyi Yuan,Jianning Ding
In this study, the EP (epoxy)/L(P) (layered double hydroxides powder)-DTMS (dodecyl-trimethoxy-silane) superhydrophobic composite coating was prepared on AZ31B Magnesium (Mg) alloy surface by spin-coating and self-assembly methods. Mg-Al layered double hydroxides (LDH) powder with ion exchange ability, prepared by hydrothermal coprecipitation, was mixed with EP to construct rough surface and provide good adhesion between the coating and Mg alloy substrate. The introduction of DTMS could reduce the surface energy of coating and improve the compactness of rough surface. Due to the shielding effect of superhydrophobic surface and the ion exchange ability of LDH, it was difficult for corrosive ions (Cl - ) to reach the substrate surface in 3.5 wt% NaCl solution. And the corrosion current density was decreased by 4 orders of magnitude. Because of the lubrication of DTMS and the layered structure of L(P), the composite coating had a good wear-reducing effect under the reciprocating point contact mode against with an AISI5200 steel ball. It provided a feasible idea for the construction of multifunctional superhydrophobic coatings on metal surface with self-cleaning, corrosion resistance and wear resistance, which will expand the industrial application fields of superhydrophobic coatings.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Yuan Wang,Tengle Wang,Shibo Liu,Zhuo Wei,Tian C. Zhang,Shaojun Yuan
Magnesium (Mg) alloys have shown great promise as engineering materials due to their unique properties. However, their high chemical reactivity limits their wide application. Herein, a novel bilayer diatomite-based composite coating was fabricated by spraying coating AZ31B Mg alloy with a bottom layer of benzotriazole (BTA)-loaded diatomite/epoxy resin for providing self-healing properties and a top layer of hexadecyltrimethoxysilane (HDTMS)-modified diatomite/epoxy resin for contributing superhydrophobic properties. The resulting bilayer composite coating (BTA@DME-12 %) exhibited exceptional stability and maintained its superhydrophobicity in a temperature range of 0–160 °C. The coating also delivered good adhesion and physical stability in tape-peeling and frictional testing. Electrochemical study results demonstrated that the BTA@DME-12 % coating exhibited lower corrosion tendencies and corrosion rates compared to the BTA@DME-free coatings. After immersing in 3.5 wt% NaCl solution for 21 days, the bilayer composite coating still achieved an impressive anti-corrosion efficiency of 99.6 %. This work not only provides a scalable and simple method to prepare self-healing and superhydrophobic bifunctional coatings for corrosion protection of Mg alloy, but also presents a novel multifunctional coating strategy by utilizing diatomite with a hierarchical structure.
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高影响因子
SURFACE REVIEW AND LETTERS
·
2023
·
IF 1.1
JINGBAO WANG,MOHAMMAD TABISH,JINGMAO ZHAO
Magnesium alloy with good application potential has a poor corrosion resistance, so it is essential to develop a new corrosion inhibitor and investigate the inhibition mechanism for magnesium alloy. In this work, three vapor phase corrosion inhibitors (VCIs) were used for AZ31B magnesium alloy under a simulated ocean–atmosphere environment, and the inhibition behaviors and mechanisms were studied. The inhibition performances of the three VCIs were evaluated by Digital Still Camera, electrochemical tests and scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) combined with X-ray photoelectron spectroscopy (XPS) was used to further explore the inhibition mechanism. Compared to benzoic acid and ammonium benzoate, o-phthalic anhydride can provide the best protection for AZ31B magnesium alloy. The i corr was reduced from 11.18 μ A cm − 2 (blank) to 0.65 μ A cm − 2 and the ( R f + R ct ) was increased from 1478.1 Ω cm 2 (blank) to 3129.8 Ω cm 2 with o-phthalic anhydride as VCI. O-phthalic anhydride combined with Mg 2 + to form different complexes with different molecular weights, which developed a more compact protective film on the AZ31B surface. Overall, the o-phthalic anhydride can be utilized as an excellent VCI for AZ31B magnesium alloy in a simulated ocean–atmosphere environment.
研究领域:
材料科学
·
腐蚀与防护
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Luyao Xu,Dejian Zhang,Huijuan Su,Peng Yu,Yong Wan,Huilai Sun
This study aimed to investigate the enhancement of the corrosion and tribocorrosion performance of AZ31B magnesium (Mg) alloys after plasma electrolytic oxidization (PEO) treatment using pullulan as an electrolyte additive . The effects of different concentrations of pullulan in the electrolyte solutions on the mechanical and corrosion-resistance properties of the PEO coatings were investigated. The microstructures and chemical compositions of the coatings were investigated via scanning electron microscopy, energy dispersive spectrum, and X-ray diffraction. The corrosion resistance of the samples in simulated body fluid was evaluated via potentiodynamic polarization and electrochemical impedance spectroscopy . The tribocorrosion performance was determined by simultaneously recording the change in the friction coefficient and the open circuit potential over time during sliding experiments. The results indicated that the addition of pullulan to the silicate-based electrolyte solutions resulted in an increase in the unit-area adsorptive capacity of the negative ions at the anode/electrolyte interface, which enhanced the compactness of the PEO coating. The PEO coating produced in electrolyte solution containing 1.0 g/L pullulan exhibited the greatest thickness (50 μm), the lowest surface roughness (1.25 μm), the highest corrosion resistance, and the best anti-tribocorrosion performance, all of which corroborated the potential application of PEO-coated Mg alloys as biological implants .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiang Liu,Tian C. Zhang,Huaqiang He,Like Ouyang,Shaojun Yuan
Corrosion is one of the most challenging issues for the large-scale application of magnesium alloys . Fabricating a superhydrophobic surface with a low-cost, easy-to-handle method is meaningful for anti-corrosion protection of Mg alloys. In this study, a stearic acid/CeO 2 bilayer coating was prepared on AZ31B Mg by a simple electrodeposition method combined with immersion in stearic acid solution. The growth traits of the coating with different electrodeposition current densities and time were evaluated, which demonstrated that 60 min combined with 0.65 mA/cm 2 is the optimal electrodeposition condition. Besides, the wettability , anti-corrosion ability, durability, chemical stability and self-cleaning properties of the coating were comprehensively investigated. The results showed that the as-prepared coating exhibited a good superhydrophobic and self-cleaning property with CA>158° and SA<2°. Moreover, the coating demonstrated an improved anti-corrosion performance in 3.5 wt% NaCl solution and was quite stable in the atmosphere and in contact with pH droplets of 1–13.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Chunting Guo,Yang Li,Caixia Qi,Huilai Sun,Dejian Zhang,Yong Wan
This study evaluated the effect of solvent acids on the structure and corrosion resistance performance of chitosan (CS) film on MAO-treated AZ31B magnesium (Mg) alloy. Initially, CS solutions were prepared in four solvent acids: acetic acid (HAc), lactic acid (LA), hydrochloric acid (HCl), and citric acid (CA). The CS films were subsequently deposited on MAO-treated AZ31B Mg alloy via a dip-coating technique. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FT-IR), contact angle measurement, and atomic force microscopy (AFM) were employed to characterize the surface and cross-sectional morphology as well as chemical composition. Furthermore, the samples were subjected to potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) tests to assess their resistance against corrosion in simulated body fluid (SBF). These results indicated that the CS film prepared with LA exhibited the lowest surface roughness (R a = 31.2 nm), the largest contact angle (CA = 98.50°), and the thickest coating (36 μm). Additionally, it demonstrated superior corrosion protection performance, with the lowest corrosion current density ( I corr = 3.343 × 10 −7 A/cm 2 ), highest corrosion potential ( E corr = −1.49 V ), and highest polarization resistance ( R p = 5.914 × 10 4 Ω·cm 2 ) in SBF. These results indicated that solvent acid types significantly influenced their interactions with CS. Thus, the structure and corrosion protection performance of CS films can be optimized by selecting an appropriate solvent acid.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
ChuanYao Zhai,QingBo Sun,AnQuan Ma,WenHao Wang,TianTian Zhu,Yan Zhang,TianJiao Yu,ZiQing Yang,Jing Lan,ZhiFeng Wang
Bone defect repair relies on the reconstruction of the maxilla and alveolar bone. Magnesium and its alloys offer great potential as implant materials due to their biocompatibility and mechanical properties, but their rapid degradation limits clinical use. This study developed an MgF 2 -polydopamine-Epigallocatechin gallate (MgF 2 -PDA-EGCG) composite coating on AZ31B magnesium alloy using hydrofluoric acid fluorination and layer-by-layer self-assembly. The coating’s corrosion resistance, biocompatibility, antibacterial properties, and osteogenic potential were evaluated. Characterization showed a dense, uniform coating (∼5.6 ± 0.2 μm thick) that significantly improved corrosion resistance. In a seven-day hydrogen evolution test and long-term immersion study, the P2E0.5 coating reduced hydrogen release (0.57 ± 0.16 mL/cm 2 ) and mass loss (7.31 ± 0.83%). Biocompatibility tests (CCK-8 and live/dead staining) confirmed no cytotoxicity. Antibacterial tests showed inhibition rates of 75.8% for Escherichia coli and 83.43% for Staphylococcus aureus. ALP activity was 188.18% ± 37.56% of the control, indicating enhanced early osteogenesis. In summary, the MgF 2 -PDA-EGCG coating improves the corrosion resistance and biological properties of AZ31B magnesium alloy, supporting its potential for biomedical implants.
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高影响因子
Nanotechnology Reviews
·
2021
·Vol. 10
·期 1
·870-882
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IF 7.848
Qiuyang Zhang,Li Zhang,Minhui Yang,Qingxiang Hong,Zhongmei Yang,Sen Liu,Qingping Xiong,Changjiang Pan
As biodegradable orthopedic implant materials, magnesium alloys have been attracted enough attentions recently. However, too fast degradation in vivo , limited biocompatibilities, and insufficient antibacterial properties are three main challenges at present. In order to solve these problems, a multifunctional composite coating of Chi(Zn/BMP2)/HA was constructed on AZ31B magnesium alloy surface, successively by the alkali heating treatment, self-assembly of 16-phosphonyl-hexadecanoic acid, in situ immobilization of Chi(Zn/BMP2) (chitosan, zinc ions, and bone morphogenetic protein 2), and the deposition of HA (hydroxyapatite). The results of ATR-FTIR (attenuated total reflection Fourier transform infrared spectrum) spectra and elemental compositions confirmed that 16-phosphonyl-hexadecanoic acid, Chi(Zn/BMP2), and HA were successfully immobilized on the surface. Compared with Mg, Mg-OH, Mg-16, and Mg-Chi(Zn/BMP2), Mg-Chi(Zn/BMP2)/HA with the concave–convex structure surface significantly enhanced the hydrophilicity and corrosion resistance. On the other hand, Mg-Chi(Zn/BMP2)/HA coating also showed excellent biocompatibilities, which not only significantly promoted the osteoblast adhesion and proliferation, but also upregulated ALP and OCN expression of osteoblasts. Furthermore, due to the synergistic antibacterial effect of zinc ions and chitosan, Mg-Chi(Zn/BMP2)/HA showed a good antibacterial property against Escherichia coli ( E. coli ). Therefore, it can be said that the method used in this work has a good application prospect in improving the corrosion resistance, biocompatibility of magnesium alloys, and inhibiting infections against E. coli .
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高影响因子
Journal of Magnesium and Alloys
·
2023
·
IF 17.6
Chao Yang,Jian Huang,Suihan Cui,Ricky Fu,Liyuan Sheng,Daokui Xu,Xiubo Tian,Yufeng Zheng,Paul K. Chu,Zhongzhen Wu
In the present research, the NaF assisted plasma electrolytic oxidation (PEO) is designed to fabricate the high-content ZnO nanoparticles doped coating on AZ31B alloy. The microstructure, phase constituents and corrosion behavior of the PEO coatings are investigated systematically. The results reveal that the introduction of NaF promotes the formation of MgF 2 nanophases in the passivation layer on Mg alloy, decreasing the breakdown voltage and discharge voltage. As a result, the continuous arcing caused by high discharge voltage is alleviated. With the increasing of NaF content, the Zn content in the PEO coating is enhanced and the pore size in the coating is decreased correspondingly. Due to the high-content ZnO doping, the PEO coating protected AZ31B alloy demonstrates the better corrosion resistance. Compared with the bare AZ31B alloy, the high-content ZnO doped PEO coated sample shows an increased corrosion potential from -1.465 V to -1.008 V, a decreased corrosion current density from 3.043×10 -5 A·cm -2 to 3.960×10 -8 A·cm -2 and an increased charge transfer resistance from 1.213×10 2 ohm·cm 2 to 2.598×10 5 ohm·cm 2 . Besides, the high-content ZnO doped PEO coated sample also has the excellent corrosion resistance in salt solution, exhibiting no obvious corrosion after more than 2000 h neutral salt spraying and 28 days’ immersion testing. The improved corrosion resistance can be ascribed to the relative uniform distribution of ZnO in PEO coating which can transform to Zn(OH) 2 and form a continuous protective layer along the corrosion interface.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Dan Zhang,Yue Zhao,Qi He,Kaixuan Feng,Zhi Hu,Guohong Ma,Zengxi Pan
Magnesium (Mg) alloys are susceptible to being attacked by corrosive ions in practical application environments, which limits their widespread application as the most promising engineering material. Herein, the superhydrophobic composite coating PVB/STA/ZIF-8@SiO 2 (PSZS) has been designed on the surface of Mg alloy by using a drop coating method to improve its corrosion resistance. In this study, we provide an approachable decoration strategy for hydrophobic and hierarchical modification of zeolite imidazolate frameworks (ZIF-8) with stearic acid (STA) and SiO 2 , and combined with polyvinyl butyral (PVB) to form a composite coating with excellent performance on the substrate surface. Notably, the PSZS composite coating exhibited superhydrophobic and the contact angle is greater than 150° after 300 cm of mechanical friction. The electrochemical testing of the PSZS composite coating indicated that it greatly protected the Mg alloys from corrosion. Moreover, the PSZS coating displayed highly effective corrosion resistance even after being immersed in 3.5 wt% NaCl aqueous solution for 7 days. Overall, the PSZS composite coating with the advantages of corrosion resistance, corrosion durability, superhydrophobic, abrasion resistance and simple preparation process broadens the horizons of Mg alloy corrosion resistance research.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Yumiao Jiang,Shuai Gao,Yingxue Liu,Huijie Huangfu,Xugeng Guo,Jinglai Zhang
Fabricating layered double hydroxides (LDHs) coatings intercalated with corrosion inhibitors is considered an effective strategy for improving the corrosion resistance of metal substrates. However, to our best knowledge, studies applying LDHs coatings modified with ionic liquids (ILs) as environmentally friendly corrosion inhibitors to corrosion protection of metals and alloys have not been reported. In this contribution, two kinds of MgAl-LDHs coatings modified with imidazolium based dicationic ILs, namely LDH-C 6 (m 2 im) 2 -I and IL@LDH-C 6 (m 2 im) 2 -I, were successfully prepared on AZ31B magnesium alloy . The LDH-C 6 (m 2 im) 2 -I coating intercalated with C 6 (m 2 im) 2 -I ionic liquid was synthesized by the co-precipitation method and hydrothermal treatment , followed by a facile immersion experiment in a dimethyl sulfoxide solution containing C 6 (m 2 im) 2 -PF 6 ionic liquid to produce the IL@LDH-C 6 (m 2 im) 2 -I composite coating . The surface morphologies and anti-corrosion properties of the two MgAl-LDHs coatings immersed in 3.5 wt% NaCl solution were investigated. The present results reveal that the LDH-C 6 (m 2 im) 2 -I coating exhibits a uniform and dense petal-like nanoflowers structure, while the IL@LDH-C 6 (m 2 im) 2 -I composite coating contains a compact C 6 (m 2 im) 2 -PF 6 IL film and a lamellar-structured LDH-C 6 (m 2 im) 2 -I, which provides a double corrosion protection to the Mg alloy. As a result, the corrosion current density of IL@LDH-C 6 (m 2 im) 2 -I is only thirty-eighth of that of LDH-C 6 (m 2 im) 2 -I and 4 orders of magnitude lower than that of bare AZ31B Mg alloy. More importantly, the surface of samples coated with IL@LDH-C 6 (m 2 im) 2 -I is still compact without being destroyed after 168 h of immersion, which can be ascribed to the synergistic effect of excellent self-healing and durable corrosion resistance. This work opens a new way of preparing MgAl-LDHs coatings modified with ionic liquids to remarkably enhance the anti-corrosion performance of Mg alloys.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Jinjun Qiao,Lingyun An,Chenggong Chang,Haiyan Xia,Ziyi Wang,Leichao Meng,Zhanying Wang,Shenghua Ma,Jing Yuan
A corrosion-resistant plasma electrolytic oxidation (PEO) composite coating was fabricated on AZ31B magnesium alloy via incorporating a Na 2 WO 4 /SDS composite inhibitor, followed by silanization. The effects of the inhibitor on coating microstructure and corrosion resistance were investigated using XRD, FT-IR, XPS, SEM, potentiodynamic polarization and EIS. Silanization effectively sealed the PEO coating, increasing its thickness and compactness. Na 2 WO 4 and SDS further enhanced coating thickness and density, improving its physical barrier against corrosive media. The loaded Na 2 WO 4 reacted with dissolved Mg 2+ to form protective MgWO 4 , inhibiting substrate erosion. SDS's hydrophobic dodecyl chains adsorbed onto the coating, forming a directional hydrophobic layer that reduced water/Cl − contact and hindered corrosive media penetration. At the exposed substrate, SDS's hydrophilic end competed with adsorbed water via electrostatic attraction, suppressing hydrogen evolution and substrate corrosion. The P-W10S-SG coating (41.2 g/L Na 2 WO 4 , 10 g/L SDS) showed optimal performance. After 480 h immersion in 3.5 wt% NaCl, its |Z| 0.01Hz remained stable at 10 7 –10 8 Ω⋅cm 2 , representing five-order-of-magnitude improvement over pure PEO, and four orders over P-SG and P-W0S-SG coatings.
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高影响因子
危险品化学品经营许可证（带存储）