A novel sol-gel coating via catechol/lysine polymerization for long-lasting corrosion protection of Mg alloy AZ31

Li, Jiao; Li, Tianshu; Zeng, Yanwei; Chen, Changcheng; Guo, Honglei; Lei, Bing; Zhang, Ping; Feng, Zhiyuan; Meng, Guozhe

doi:10.1016/j.colsurfa.2022.130361

Cited by 24 publications

(9 citation statements)

References 42 publications

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“…FT-IR was employed to analyze the functional groups on the film. The FTIR spectra in Figure 5 showed characteristic bands at 3400 cm −1 and 1630 cm −1 correspond to the surface water and hydroxyl group [ 33 , 34 ]. TiO 2 anatase has stable ultraviolet light absorption performance, but it has low light absorption efficiency in visible light and infrared light [ 35 , 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

Physicochemical and Antibacterial Evaluation of TiO2/CNT Mesoporous Nanomaterials Prepared by High-Pressure Hydrothermal Sol–Gel Method under an Ultrasonic Composite Environment

Lai¹,

Zhao

et al. 2023

Molecules

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TiO2 has attracted significant research interest, principally due to its nontoxicity, high stability, and abundance. Carbon-doped TiO2 can improve light absorption efficiency. In order to prepare high-efficiency photocatalysts, carbon-doped composites were prepared by hydrothermal reaction in a high-pressure reactor, and then TiO2/CNT mesoporous composites were prepared by the sol–gel method in an ultrasonic environment. Characterized by SEM and TEM, the composite materials contained TiO2 nanoparticles as well as CNT. After phase analysis, it was the anatase-doped phase. The following infrared light absorption performance and Escherichia coli bactericidal performance tests showed that it had better infrared and visible light absorption performance than pure TiO2. The TiO2/CNT mesoporous nanomaterials synthesized in this work are possible for clean industrial productions.

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Section: Resultsmentioning

confidence: 99%

Physicochemical and Antibacterial Evaluation of TiO2/CNT Mesoporous Nanomaterials Prepared by High-Pressure Hydrothermal Sol–Gel Method under an Ultrasonic Composite Environment

Lai¹,

Zhao

et al. 2023

Molecules

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“…The composite coating also had good corrosion resistance in a similar manner. Li et al prepared a novel catechol/lysine (CA/Lys) polymeric sol-gel coating (CA/Lys@Sol-gel) [ 26 ]. Experimental results showed that the unmodified sol-gel coating failed after only 3 days of testing, while the CA/Lys@Sol-gel provided up to 18 days of corrosion protection at aqueous 0.1 M NaCl.…”

Section: Composite Sol-gel Coatingsmentioning

confidence: 99%

“…The external methods include surface treatment and coating processes (electroplating, chemical conversion coating, electrochemical conversion coating, laser/ion or electron beam treatment, sol-gel coating, and organic coating, etc.) [ 6 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Among them, the surface coating method may be the most simple and direct method.…”

Section: Introductionmentioning

confidence: 99%

Advances in the Modification of Silane-Based Sol-Gel Coating to Improve the Corrosion Resistance of Magnesium Alloys

2023

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As the lightest structural materials, magnesium (Mg) alloys play a significant role in vehicle weight reduction, aerospace, military equipment, energy saving, and emission reduction. However, the poor corrosion resistance of Mg alloys has become a bottleneck restricting its wide application. Developing a good surface protective coating can effectively improve the corrosion resistance of Mg alloys. The silane-based sol-gel coating technology has been widely used in the corrosion protection of Mg alloys in recent years due to its advantages of simple process, accessible tailoring of film composition and structure, and excellent corrosion resistance. Whereas the synthesis of sol-gel coatings includes the hydrolysis and dehydration process, which may inherently contain micron or nano defects in the coatings, thereby making it detrimental to the anti-corrosion effect. Therefore, in order to enhance their protection against corrosion, the appropriate modification of sol-gel coatings has become a current research hotspot. This review is based on the modification methods of silane-based sol-gels on the surface of Mg alloys, which are divided into four categories: bare sol-gel, nanoparticles, corrosion inhibitors, and sol-gel-based composite coatings. The modification methods and corrosion protection mechanism are discussed respectively, and the application, development, and research strategies of silane-based sol-gel coatings are included.

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“…For corrosion weight loss determination, the surface oxides film was removed by immersing the samples in 200 g/L chromic acid for 2 min (Liu et al, 2007). The surface morphology of as-corroded samples was characterized by scanning electron microscopy (SEM) (Philips XL30 FEG), equipped with energy dispersive spectroscopy (EDS) for elements detections.…”

Section: Immersion Tests and Corrosion Product Characterizationsmentioning

confidence: 99%

Varied corrosion evolution behavior of pure Mg, AZ31 and AZ91 magnesium alloys in phosphate buffer solution

Chen

Sun

et al. 2023

ACMM

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Purpose The purpose of this study is to investigate the initial corrosion behavior of pure Mg, AZ31 and AZ91 alloys in phosphate buffer solution (PBS) and to characterize the features in corrosion type and resistance of the corrosion product layer. Design/methodology/approach The scanning electron microscopy, equipped with energy-dispersive spectroscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy have been used to characterize the as-corroded samples. Besides, the Mg2+ concentration in PBSs has been determined by inductively coupled plasma atomic emission spectrum. Findings It has been found that pure Mg suffers pit corrosion, and AZ31 initially undergoes pit corrosion and then uniform corrosion dominates with an extended immersion duration. However, AZ91 exhibits the uniform corrosion with the highest corrosion rate among the three materials. Besides, the corrosion product layer on AZ31 has the best compactness and corrosion resistance. Originality/value The findings add depth in understanding the corrosion of pure Mg and its alloys in PBS and also have guiding significance in exploring the effects by alloyed elements to develop new biomaterials with better performance.

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A novel sol-gel coating via catechol/lysine polymerization for long-lasting corrosion protection of Mg alloy AZ31

Cited by 24 publications

References 42 publications

Physicochemical and Antibacterial Evaluation of TiO2/CNT Mesoporous Nanomaterials Prepared by High-Pressure Hydrothermal Sol–Gel Method under an Ultrasonic Composite Environment

Physicochemical and Antibacterial Evaluation of TiO2/CNT Mesoporous Nanomaterials Prepared by High-Pressure Hydrothermal Sol–Gel Method under an Ultrasonic Composite Environment

Advances in the Modification of Silane-Based Sol-Gel Coating to Improve the Corrosion Resistance of Magnesium Alloys

Varied corrosion evolution behavior of pure Mg, AZ31 and AZ91 magnesium alloys in phosphate buffer solution

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