Materials
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2023
·Vol. 16
·期 10
·3835
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IF 3.4
Mustafa Muhammad,Ruina Ma,An Du,Yongzhe Fan,Xue Zhao,Xiaoming Cao
In this work, PDA@BN-TiO2nanohybrid particles were incorporated chemically into a zinc-phosphating solution to form a robust, low-temperature phosphate-silane coating on Q235 steel specimens. The morphology and surface modification of the coating was characterized by X-Ray Diffraction (XRD), X-ray Spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), and Scanning electron microscopy (SEM). Results demonstrate that the incorporation of PDA@BN-TiO2nanohybrids produced a higher number of nucleation sites and reduced grain size with a denser, more robust, and more corrosion-resistant phosphate coating compared to pure coating. The coating weight results showed that the PBT-0.3 sample achieved the densest and most uniform coating (38.2 g/m2). The potentiodynamic polarization results showed that the PDA@BN-TiO2nanohybrid particles increased phosphate-silane films’ homogeneity and anti-corrosive capabilities. The 0.3 g/L sample exhibits the best performance with an electric current density of 1.95 × 10−5A/cm2, an order of magnitude lower than that of the pure coatings. Electrochemical impedance spectroscopy revealed that PDA@BN-TiO2nanohybrids provided the greatest corrosion resistance compared to pure coatings. The corrosion time for copper sulfate in samples containing PDA@BN/TiO2prolonged to 285 s, a significantly higher amount of time than the corrosion time found in pure samples.Keywords:zinc-phosphating bath;corrosion-resistance;steel;dopamine;boron nitride;organosilane coating;nano-TiO2
研究领域:
材料科学
·
腐蚀与防护
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 20
·11087
·
IF 5.924
Guangjie Hu,Yuxuan Xiao,Jie Ying
Coatings are of great significance for irons and steels in regards to the harsh marine environment. Graphene oxides (GO) have been considered as an ideal filler material of epoxy coating. However, the undesired dispersion in the epoxy together with easy agglomeration and stacking remain great problems for practical application of GO composited epoxy coatings. A method that can effectively solve both self-aggregation and poor dispersion of GO is highly desired. Herein, we present a high dispersion strategy of graphene oxides in epoxy by co-decoration of nano-SiO2and silane coupling agent. The co-decorated GO filled epoxy coating exhibits high anti-corrosion performance, including high electrochemical impedance, high self-corrosive potential, low self-corrosive current, and superior electrochemical impedance stability for ten days to Q235 carbon steel. This work displays new possibilities for designing novel coating materials with high performance toward practical marine anti-corrosion applications.Keywords:graphene oxide;epoxy coating;surface decoration;anti-corrosion
研究领域:
材料科学
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腐蚀工程
·
表面化学
·
涂层技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yinlong Li,Yingqing Zhan,Yiwen Chen,Hongyi Zhang,Yajie Lei,Hongshan Jia,Fei Zhu,Xulin Yang
In order to satisfy the long-term corrosion protection of metal in harsh environments, the development of smart polymer coatings with self-repairing and self-warning functions can reach their anticipated application prospects. Herein, a new CS@HMTNs-8HQ nanocontainer, composed of a core of mesoporous hollow titanium dioxide (HMTNs) loaded with 8-hydroxyquinoline (8HQ) and a shell of chitosan (CS), was designed via simple template and vacuum-assisted technique. Grafting CS@HMTNs-8HQ nanocontainer onto the graphene oxide (GO) platform and further introducing into the waterborne epoxy (WEP) coatings imparted the healable and self-warning intelligent properties to carbon steel (Q235). It was found that the mesoporous hollow structure of HMTNs constructed by high-temperature calcination and alkaline etching yielded a high specific surface area of 190.82 m 2 /g and suitable pore size of 3 nm, thus achieving a high loading capacity of corrosion inhibitor (33.6 wt%) and ensuring long-term protection of metal substrate. The results of electrochemical impedance spectroscopy (EIS) indicated that the designed WEP coating displayed excellent healable ability. Benefiting from the synergistic effect of GO and CS@HMTNs-8HQ, the low-frequency impedance of the composite coating reached 7.63×10 9 Ω cm 2 after 90 days of immersion in 3.5 wt% NaCl, verifying its long-term protection. In addition, the WEP composite coating indicated a distinctive black-green colour in damaged areas after 120 h of salt spray testing, demonstrating the unique early warning ability. This intelligent coating with passive self-repairing and self-warning functions shows great potential prospect in practical anti-corrosion applications.
研究领域:
材料科学
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腐蚀与防护
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纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qing Yin,Jiali Liu,Zicheng Zhong,Yueyuan Zhang,Feiran Zhang,Mingming Wang
In this study, chitosan (CS) and phytic acid (PA) were employed as raw materials to synthesize a range of chitosan–phytic acid complexes (CP) with different ratios (CS:PA = 12:1, 9:1, 6:1, 3:1, 1:1). The structures and elemental compositions of the compounds were characterized using Fourier-Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS). The thermal stability of the synthesized materials was analyzed using a Thermogravimetric Analyzer (TG). Electrochemical testing was conducted to explore the corrosion inhibition effect of the modified inhibitors with varying ratios on Q235 steel in 3.5 wt% NaCl solution. Additionally, Scanning Electron Microscopy (SEM) was utilized to investigate the surface morphology of the immersed samples. When the CS:PA ratio was 3:1, CP exhibited an impressive corrosion inhibition efficiency of 94.9 %. Furthermore, the antimicrobial properties of CP were evaluated using the colony plate counting method. At a CS:PA ratio of 1:1, CP demonstrated the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) at 0.1250 % and 0.5000 %, respectively. This research introduces a novel green corrosion inhibitor capable of simultaneously reducing the electrochemical corrosion of Q235 while inhibiting biocorrosion, avoiding the antagonistic effects arising from the simultaneous use of biocides and corrosion inhibitors in the system.
研究领域:
材料科学
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腐蚀工程
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生物技术
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化工工程
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Weilin Liu,Jiansan Li
Corrosion resistance coating applied on Q235 carbon steel in a chloride-rich environment was explored in our research. The coating as a barrier inhibits the penetration of the corrosion medium and provides active corrosion protection for Q235 carbon steel. Halloysite nanotubes (HNTs) were loaded with sodium lignosulfonate (SLS) under vacuum conditions. 4.53% of loading efficiency was validated by thermogravimetric analysis (TGA). The deposition of polyelectrolyte layers including poly(dimethyl diallyl ammonium chloride) (PDDA) and poly(styrenesulfonate) (PSS) not only resulted in controlling the release rate of SLS but also enabled the HNTs to possess pH-responsive release property. The modified HNTs were defined as “PSS/PDDA/SLS/HNTs”, which were characterized by SEM, TEM, FTIR, and zeta potential analyses. TGA elucidates that PSS/PDDA/SLS/HNTs exhibit superior thermal stability. The results of UV–vis spectroscopic analysis confirm that HNTs exhibit a higher release amount in an alkaline medium than in neutral and acidic conditions. Afterward, PSS/PDDA/SLS/HNTs were mixed with the epoxy coating, which was applied on Q235 carbon steel immersed in 3.5 wt % NaCl solution. Electrochemical measurements illustrate the excellent corrosion resistance of the epoxy coating with the addition of PSS/PDDA/SLS/HNTs. Also, water contact angle analysis demonstrates the modification of the epoxy coating with decent hydrophobicity.
研究领域:
材料科学
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腐蚀工程
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纳米技术
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涂层技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Deng Wang,Jianing Xu,Jihui Wang,Wenbin Hu
In this work, an economical and environmentally friendly polyaspartic acid-zinc (PASP-Zn) film was successfully prepared on the surface of Q235 steel by coordination self-assembly, and the preparation conditions of PASP-Zn film were optimized by single factor method. The surface morphology and thickness of PASP-Zn film were investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM), and the structure and composition of PASP-Zn film were determined by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The corrosion resistance of PASP-Zn film on Q235 steel in 3.5wt % NaCl solution was analyzed by electrochemical impedance spectroscopy (EIS) and polarization curves. The results show that PASP film and PASP-Zn film are successfully prepared on the surface of Q235 steel, and the single PASP film is self-assembled monolayers with thin thickness and loose structure. Whereas PASP-Zn film shows a rough morphology, accompanied by appearance of a large amount of nanoparticles, and the thickness of PASP-Zn film is about 98.0 nm. PASP-Zn film exhibits much better corrosion protective performance than PASP film in 3.5 wt % NaCl solution, and the highest protection efficiency can reach 94.48 %. The excellent coordination ability between PASP and zinc ions can effectively improve the compactness and thickness of PASP-Zn film, and prevent the corrosive ions from contacting the Q235 steel surface. By adjusting the preparation conditions, a PASP-Zn film with optimal corrosion resistance was prepared in the film-forming solution containing PASP/Zn ratio of 1:8 and pH value of 5.0 for 30 min.
研究领域:
材料科学
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腐蚀科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Weiya Tan,Wenjie Zhao
Addition of Ti 3 C 2 T x nanosheets into epoxy matrix is crucial for improving the mechanical and anti-corrosion properties, depending on their unique structures and properties. However, randomly-arranged Ti 3 C 2 T x nanosheets failed to meet higher corrosion protection requirements especially under alternating hydrostatic pressure (AHP) environment. Herein, inspired by the unique structure of mille crepe cake, the tannic acid (TA)-functionalized Ti 3 C 2 T x nanosheets were distributed parallelly in the epoxy matrix using a simple blade-coating method to form layer-by-layer (LBL) coating. Particularly, epoxy matrix incorporated with TA@Ti 3 C 2 T x exhibited a nearly perfect internal parallel arrangement structure due to shear force during blade-coating, excellent compatibility, and higher binding force. As being immersed 60 days at 1 atm and 240 h at 20 MPa AHP in 3.5 wt% NaCl solution, the worst frequency impedance values was enhanced by 1–3 orders of magnitude for the parallel alignment in comparison to the randomly-arranged TA@Ti 3 C 2 T x composite coating. The results were mainly due to the fact that parallelly-arranged TA@Ti 3 C 2 T x could maximize tortuosity and got the utmost out of the barrier properties of composite coating. Moreover, electrochemical characterization of defects and Molecular Dynamics (MD) simulations results proved that TA could react with Q235 steel in three ways to form ferric-tannates, which could further prevent the corrosion of steel. Prospectively, the parallelly alignment of TA@Ti 3 C 2 T x nanosheets in epoxy would greatly increase the corrosion resistance of composite coating, especially suitable for AHP environment.
研究领域:
材料科学
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腐蚀工程
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表面涂层
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xianliang Li,Yawei Shao,Zhihao Chen,Yanqiu Wang,Junyi Wang
In this study, a fluorescence and Fe 3+ ions-responsive cerium-based metal organic framework is decorated on phytic acid-glucose hydrothermal copolymer-coated montmorillonite (MMT@CP@Ce-MOF) nanocontainer, which was developed for Q235 carbon steel's corrosion protection and detection in solution, waterborne epoxy coatings (WEP), and solvent epoxy coatings (EP). In the solution phase, the corrosion detection ability of Q235 carbon steel was introduced, relying on the Fe 3+ ions-responsive characteristic of MMT@CP@Ce-MOF. In the coating phase, WEP and EP with good barrier effect, active anti-corrosion, self-detection, and good mechanical performance were fabricated by integrating MMT@CP@Ce-MOF nanocontainers. The EIS results indicated that 2D MMT@CP@Ce-MOF based composite coating showed better anti-corrosion performance (the |Z| f= 0.01Hz value of EP-MMT@CP@Ce-MOF and WEP-MMT@CP@Ce-MOF remained 1.33 × 10 9 Ω·cm 2 and 2.71 × 10 8 Ω·cm 2 , respectively, far higher than the bare coating) after 40 d immersion. At the same time, the Ce-MOF nanosensor could accurately reflect the occurrence of corrosion at the coating damage sites. Furthermore, high adhesion force (2–3 times higher than bare coating) and results of coating fracture surface showed that homogenously incorporated MMT@CP@Ce-MOF could improve the composite coating mechanical properties by chemical interaction with the epoxy polymer.
研究领域:
材料科学
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腐蚀工程
·
纳米技术
·
表面工程
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涂层技术
·
传感器
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）