ANTI-CORROSION METHODS AND MATERIALS
·
2024
·Vol. 71
·期 5
·543-554
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IF 2.3
Shengjian Zhang,Min Li,Baoyi Li,Hansen Zhao,Feng Wang
PurposeTo improve the corrosion resistance of magnesium alloys, the construction of protective coatings is necessary to extend the service life of Mg-based materials.Design/methodology/approachSiO2nanoparticles modified by dodecyltrimethoxysilane (DTMS) were added to the PP and a superhydrophobic Mg(OH)2/PP-60mSiO2composite coating was fabricated on the surface of AZ31 magnesium alloy via the hydrothermal method and subsequently the immersion treatment.FindingsHydrophilic SiO2nanoparticles become hydrophobic after modified by DTMS, showing a higher dispersibility in xylene. By incorporating modified SiO2nanoparticles into the composite PP coating, the hydrophobicity of the layer was enhanced, resulting in a contact angle of 166.3° and a sliding angle of 3.4°. It also improved the water repellency and durability of the coating. Furthermore, the intermediate layer of Mg(OH)2significantly strengthened the bond between the PP layer and the substrate. The Mg(OH)2/PP-60mSiO2composite coating significantly enhances the corrosion resistance of the magnesium alloy by effectively blocking the infiltration of the corrosion anions during corrosion. The corrosion current density of the Mg(OH)2/PP-60mSiO2composite coating is approximately 8.23 × 10–9A·cm-2, which can achieve a magnitude three times lower than its substrate, making it a promising surface modification for the Mg alloy.Originality/valueThe composite coating effectively and durably enhances the corrosion resistance of magnesium alloys.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
SCANNING
·
2020
·
IF 1.33
Lin Sun,Bing Cheng Zhao,Teng Wang,Jia Yi Cui,ShuXin Zhang,Feng Li,Qianqian Zhang,HongXin Cai,Heng Bo Jiang,Eui-Seok Lee
The application prospect of biodegradable materials is being studied extensively. However, the high corrosion rate and its alloys in body fluids have been major limitations of the application of pure Mg (magnesium). To improve corrosion resistance of biodegradable AZ31 Mg alloy, we adopted microarc fluorination within a voltage range of 100-300 V in 46% hydrofluoric acid. To obtain morphologies, chemical compositions, and structural characteristics, field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were performed, respectively. Results showed that the coating was mainly composed of MgF2. Electrochemical corrosion and immersion tests proved that the corrosion resistance of MAF-treated AZ31 Mg alloy was significantly improved compared with untreated AZ31 Mg alloy in HBSS (Hank’s Balanced Salt Solution). Current densities of AZ31, MAF100, MAF150, MAF200, MAF250, and MAF300 were 342.4, 0.295, 0.228, 0.177, 0.199, and 0.212 μA/cm2, respectively. The roughness test indicated that samples under MAF treatment of 200 V, 250 V, and 300 V had large surface roughness. Meanwhile, the contact angle measurement and surface free energy test suggested that those samples had smaller contact angle and higher SFE than Ti. Thus, MAF-treated AZ31 Mg alloy might have promising application in various fields.
研究领域:
材料科学
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生物医学工程
·
腐蚀科学
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DOI
PubMed
高影响因子
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.9
Shengjian Zhang,Min Li,Zhengwei Song,Baoyi Li
Corrosion resistance remains a significant challenge for magnesium (Mg) alloys, particularly in aggressive environments. To address this issue, the application of super-hydrophobic surfaces has emerged as a promising strategy. A composite coating was developed to enhance the corrosion resistance of AZ31 magnesium alloy by sequentially applying a dodecyltrimethoxysilane (DTMS) layer, followed by a polypropylene (PP) layer. The PP layer, composed of micro-scale spherical particles, exhibited exceptional super-hydrophobicity and chemical stability. Notably, the DTMS layer significantly improved the adhesion between the PP coating and the AZ31 substrate. Scratch tests indicated a critical load of 1482 mN for the DTMS/PP composite coating. Furthermore, the corrosion current density of the composite coating decreased to as low as 1.13 × 10−7 A·cm−2, representing a two-order-of-magnitude reduction compared to the bare AZ31 substrate. Electrochemical impedance spectroscopy revealed a high charge transfer resistance of 5.47 × 105 Ω·cm² for the DTMS/PP composite coating, underscoring its superior corrosion resistance. These results highlight the effectiveness of the newly developed coating in both mitigating corrosion and enhancing the durability of AZ31 magnesium alloy in aggressive environments.
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DOI
高影响因子
Surfaces and Interfaces
·
2020
·
IF 3.724
Zhiwei Zhou,Bo Zheng,Haiyang Lang,Aimiao Qin,Jun Ou
Magnesium (Mg) and its alloys have received widespread attention as implants for orthopedic surgery due to their degradability and appropriate mechanical properties . However, their poor corrosion resistance may lead to a decline of mechanical properties as well as changes in the surrounding microenvironment, which will eventually lead to their failure as implants. In this work, hyaluronic acid (HYA) was immobilized on AZ31 alloy via a mussel-inspired polydopamine (PDA) anchoring layer. The HYA layer closed the cracks caused by the PDA layer. In vitro corrosion behavior of the PDA/HYA composite coating was investigated via potentiodynamic polarization (PDP) and static immersion assay. The corrosion current density of PDA/HYA coating decreased from 8.48×10 −5 A/cm 2 to 5.71×10 −6 A/cm 2 . During immersion, no obvious local alkalization was observed. Large amounts of calcium phosphate deposited on PDA/HYA coating, which enhanced the biological activity. MTT experiments show that the MC3T3-E1 cell survival rate of polydopamine coating exceeds 100% after cultivated for 5 days. It was found that the number of cells spreading on the surface of PDA/HYA composite coating was the most after the cell culture directly on the surface.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shidong Wang,Huifang Zhang,Zhiqiang Qian,Xiushen Ye,Zhijian Wu,Shengting Li
Superhydrophobic coating on magnesium alloy by employing polydopamine@SiO 2 (PDA@SiO 2 ) particles and silane via a facile one-step spraying technique was prepared in this study. Surface morphology, chemical compositions, roughness and wettability of the coating were comprehensively investigated by Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectra (FTIR), 3D optical microscope and contact angle techniques, respectively. Corrosion resistance of the coating was evaluated by electrochemical impedance spectroscopy (EIS). Results indicated that the coating exhibited superhydrophobicity due to its micropapillae structure and low surface energy of silica aggregates. The coating showed outstanding superhydrophobicity with contact angle (CA) larger than 154 o and sliding angle (SA) less than 3 o .|Z|0.01Hz of superhydrophobic coated sample reached 6.916 × 10 8 Ω cm 2 , which showed excellent corrosion performance. The superhydrophobic coating can protect the specimen surface from being eroded even after fifteen days immersion in NaCl solution, indicating that the coating had a strong stability in corrosive media.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Hanaa Soliman,Junyu Qian,Shuai Tang,Peng xian,Yingqi Chen,Abdel-Salam Makhlouf,Guojiang Wan
The polymerized Hydroxyquinoline (HQ) coatings incorporated with corrosion inhibitor nano-Graphene Oxide (GO) particles were fabricated on treated magnesium AZ31 alloy. The effect of surface treatment of AZ31 using either oxidation or phosphating was much more effective than GO embedment on the corrosion resistance and self-healing functionality. Surface treatment prior to GO/HQ deposition plays a vital role in initiating more anchoring bonds between molecules to fasten any scratch healing. The anticorrosion behavior of the GO/HQ hybrid coating will be discussed in the light of SEM, XRD , XPS and FTIR analysis.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 32
·14665-14676
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IF 3.591
Sheng-Jian Zhang,Duan-Lin Cao,Li-Kun Xu,Jian-Ke Tang,Rong-Qian Meng,Hong-Dao Li
A superhydrophobic and corrosion-resistant coating with hierarchical macro/nanostructures was constructed by one-step electrodeposition of dodecyltrimethoxysilane (e-DTMS) on Mg alloy AZ31 in a relatively media. The surface morphology and chemical composition were characterized using field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). Surface wettability was evaluated by measuring water contact angles and sliding angles of water droplets. The protective performance was measured by electrochemical and hydrogen evolution tests. The results indicated that the e-DTMS coating had excellent self-cleaning performance with a contact angle of 158° ± 2.3° and a sliding angle of 4° ± 0.5°. The superhydrophobic surface greatly reduced the contact area between the AZ31 substrate and water, and it was chemically stable in corrosive media. The corrosion current density (2.11 × 10−7 A cm−2) of the e-DTMS coating was about three hundred times less than that of the AZ31 substrate (7.34 × 10−5 A cm−2). The results demonstrated that the e-DTMS coating remarkably enhanced the anti-corrosion performance of AZ31 alloys.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Sheng-Jian Zhang,Duan-Lin Cao,Li-Kun Xu,Jian-Ke Tang,Rong-Qian Meng,Hong-Dao Li
Superhydrophobic coatings can remarkably improve the anti-corrosion performance of many materials. In this study, a fluorine-free superhydrophobic Mg(OH) 2 /DTMS composite coating was successfully fabricated on the surface of Mg alloy AZ31 by hydrothermal process and electrodeposition of dodecyltrimethoxysilane to enhance corrosion resistance . The corrosion resistance of the coating was tested using a potentiodynamic polarization scan, electrochemical impedance spectroscopy (EIS), and hydrogen evolution measurements. The superhydrophobicity was investigated by measuring water contact angles and sliding angles. The results showed that the Mg(OH) 2 /DTMS composite coating was composed of walnut-like micro/nanostructures and exhibited superhydrophobicity with a contact angle of 165.1° ± 2.1° and a sliding angle of 3.5° ± 0.6°. Moreover, the corrosion current density of the composite coating (1.777 × 10 −8 A·cm −2 ) decreased about three orders of magnitude compared with uncoated AZ31 substrate (7.342 × 10 −5 A·cm −2 ), suggesting that the composite coating had excellent corrosion resistance. Finally, the anti-corrosion mechanism of the composite coating was also addressed.
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
Journal of Materials Research and Technology-JMR&T
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2023
·
IF 6.4
Zhenzhen Feng,Xiaomeng She,Jian Peng,Yujie Qiang,Song Zhang
Although magnesium alloys have been effectively used in industry, they have weak corrosion resistance. Herein, robust Ni-thiolate coordination polymer Mg(OH) 2 coatings were prepared by an oxidation-hydrolysis-coordination (OHC) strategy to make AZ31 magnesium alloy highly resistant to corrosion in 3.5 wt% NaCl solution. The OHC process includes three steps: I) oxidation of AZ31 to produce AZ31@MgO; II) hydrolysis of MgO to produce Mg(OH) 2 , cation exchange between Mg(OH) 2 and Ni(II) to produce Mg–Ni LDH; III) coordination of Ni(OH) 2 from Mg–Ni LDH by the 1,4-Benzenedithiol (BDT) ligand to produce LDH-BDT coatings. Potentiodynamic polarization, EIS, and in situ SRET in 3.5 wt% NaCl solution were used to assess the hybrid coating's anti-corrosion performance. Surprisingly, LDH-BDT coating achieves excellent corrosion inhibition performance (99.9999%) with the i corr of 1.926 × 10 −10 A cm −2 , which is six orders of magnitude lower than that of AZ31 substrate, this is due to the cooperative effect, such as the physical protection provided by thick LDH-BDT coatings and the hydrophobic properties of Ni(II)-BDT coordination polymers. This study provides fresh insight into the fabrication of Mg(OH) 2 -based coatings modified with Ni-thiolate complex to significantly improve Mg alloys' resistance to corrosion.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yan Shi,Yang Zhang,Chengping Miao,Jianxing Yu,Xiaohua Tu,Jiayou Li
Plasma electrolytic oxidation (PEO) coatings with long-lasting active protection were prepared by incorporating 2-mercaptobenzothiazole (MBT)-loaded halloysite nanotubes (HNTs), followed by introduced insoluble Cu-MBT complex, has been achieved in present study. To further compare and analyze the corrosion characteristics of the sample, different halloysite nanotubes (HNTs, MBT@HNTs) profiles were also added to the electrolytes for the preparation of different oxide films (HNTs-PEO and MBT-HNTs-PEO). The coatings were characterized by scanning electron microscopy (SEM), film thickness meter, roughness meter, energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The corrosion behavior was evaluated by electrochemical impedance spectroscopy (EIS), and open circuit potential (OCP) tests. The results show that the long-term corrosion resistance of magnesium alloys can be improved by adding Cu - MBT-HNTs owning to the self-healing effect.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 36
·17188-17202
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IF 4.682
Ouyang Yuanyong,Zhang Zihao,Huang Wei,Yang Wenzhong,Shen Chuanlai,Chen Yun,Yin Xiaoshuang,Liu Ying
Fluorinated hydroxyapatite-titanium dioxide coating (F-doped HA-TiO 2 ) was deposited in situ onto AZ31 Mg alloy using electrodeposition method. XRD and EDS confirmed the crystal structure and composition of the coating. SEM images showed that the F-doped HA-TiO 2 coating on the surface of AZ31 Mg alloy was extremely uniform and the thickness of coating was reflected by the cross-sectional image. Corrosion behavior of the coating modified Mg alloy was tested by electrochemical and immersion experiments. Compared to the corrosion current density ( I corr ) of the uncoated AZ31 Mg alloy in Hank’s solution, the I corr of F-doped HA-TiO 2 coating was decreased almost 4 orders. The coated AZ31 Mg alloy showed superior biocompatibility, which was strongly demonstrated by the amounts of cells increased in cell culture. The results of hemolysis tests also illustrated that the F-doped HA-TiO 2 coating met the requirements of biomedical materials.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Chen Zhao,Xingwei Wang,Chuanpeng Li,Yu Liu,Shuang Sun,Shuangshuang Yang,Yuchen Sun,Zhenjun Peng,Qiangliang Yu,Meirong Cai,Bo Yu,Feng Zhou,Weimin Liu
Sodium dodecyl sulfate (SDS) and 8-Hydroxyquinoline (8-HQ) intercalated layered double hydroxides (LDH) sheets were in-situ formed in MAO layer to prepare a composite coating (CI@LDH-MAO) on AZ31 magnesium alloy . This composite coating demonstrates commendable anti-corrosion performance, primarily attributed to the formation of LDH sheets and insoluble Mg(HQ) 2 compounds. The electrochemical impedance modulus of the composite coating surpasses that of the MAO coating by three orders of magnitude after immersion of 360 h. Concurrently, the CI@LDH-MAO composite coating exhibits exemplary tribological properties, characterized by a friction coefficient of approximately 0.19 and a wear rate of (11.5 ± 1.5)× 10 −6 mm 3 /(N·m). This outstanding tribological performance can be ascribed to enhanced interaction of lubricants with the friction interface by 8-HQ and SDS anions.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）