CORROSION SCIENCE
·
2016
·
IF 5.154
C.D. Gu,W. Yan,J.L. Zhang,J.P. Tu
A novel ionothermal strategy for developing a chemical conversion film on magnesium alloys is proposed based on the interaction of a deep eutectic solvent (DES) with the substrate. Upon heating the choline chloride/urea mixture-based DES can react with the AZ31B magnesium alloy surface to form a promising anti-corrosion conversion film. Interestingly, the chemical conversion film is mainly composed by MgH 2 and MgCO 3 phases. The as-grown conversion film exhibits superhydrophobicity after surface modification in a stearic acid/ethanol solution. Electrochemical tests and visual investigations indicate the corrosion resistance of the magnesium alloy can be improved by the conversion film.
研究领域:
材料科学
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金属腐蚀与防护
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表面工程
·
功能材料
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Chendi Ding,Yu Tai,Dong Wang,Linghua Tan,Jiajun Fu
A superhydrophobic, self-healing anti-corrosion coating was prepared by in-situ growth of tungstate corrosion inhibitor intercalated layer double hydroxides (LDHs) conversion film on the AZ31B magnesium alloy and then post-sealing a hydrophobic polymer layer of ureido crosslinked polydimethylsiloxane (U-PDMS) with laurate modified LDHs power (La-LDH) on the surface. The coverage of the dense, water-repellent top layer could suppress the penetration of electrolyte into the bottom LDHs layer and preserve the intercalated tungstate inhibitor from being wasted by ion-exchange at the very beginning of immersion. The anti-corrosion performance provided by the composite film was assessed by multiple methods including, potentiodynamic polarization, open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), immersion test and scanning vibrating electrode technique (SVET). The results indicate that compared to LDHs coating, the superhydrophobic composite coating shows longer term protection and faster self-healing effect, which is of great significance to expand the potential applications of magnesium alloys.
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Wenjuan Cui,Zhengang Chen,Ruinan Xiong,Leyan Tang,Ling Zhu,Chenyang Cai,Xiaosong Zhou
Corrosion resistance is a critical challenge for magnesium alloys, particularly AZ31B, in aerospace, military, and biomedical applications. This study investigates the anti-corrosion performance of superhydrophobic SiO₂ NPs-modified PTFE/PUA hybrid coatings on AZ31B, fabricated using rod and spray painting techniques. The coatings exhibited excellent superhydrophobic properties, with contact angles exceeding 155° and a contact angle hysteresis (CAH) below 5° Electrochemical evaluations of superhydrophobic SiO₂ NPs-modified PTFE coatings demonstrated a reduction in i corr by four orders of magnitude compared to that of raw AZ31B Mg alloys, achieving a corrosion inhibition efficiency (η p ) of ∼ 99.9 % in a 3.5 wt % NaCl solution. The E corr shifted positively by 0.968 V and 1.022 V, respectively. Additionally, the R ct of the SiO₂ NPs-PTFE hybrid coatings increased by four orders of magnitude compared to blank PTFE-0-R coatings, indicating robust and enhanced corrosion resistance. The study also found minimal differences in corrosion protection based on fabrication technique, while SiO₂ NPs-PUA coatings showed limited effectiveness in corrosion resistance. These findings highlight the potential of superhydrophobic PTFE hybrid coatings in addressing corrosion challenges for magnesium alloys.
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高影响因子
Coatings
·
2022
·Vol. 12
·期 5
·578
·
IF 3.236
Su Pan,Xiaohua Tu,Jianxing Yu,Yang Zhang,Chengping Miao,Yaling Xu,Rui Fu,Jiayou Li
The optimization of NaOH-Na2SiO3-Na2B4O7electrolyte for the plasma electrolytic oxidation of AZ31B magnesium alloy was investigated through orthogonal tests. The properties of the anodized films were evaluated by film thickness, roughness measurements, salt spray tests, scanning electron microscopy (SEM), X-ray diffraction (XRD) and potentiodynamic polarization tests, respectively. The orthogonal tests revealed that the optimal formulation of the electrolyte comprised NaOH 45 g/L, Na2SiO350 g/L, and Na2B4O790 g/L. NaOH exhibited the most significant effect on film thickness, while Na2SiO3had the greatest effect on corrosion resistance. Moreover, the optimal electrical parameters were also obtained with the values of current density 1 A /dm2, oxidation time 15 min, pulse frequency 200 Hz and duty cycle of 10%. The surface morphology of the anodized coating formed under optimal conditions was uniform and compact. Furthermore, the phase compositions of all samples were mainly composed of MgO and Mg2SiO4. The corrosion potential, corrosion current density and polarization resistance of the prepared coating by plasma electrolytic oxidation improved remarkably compared with that of the substrate.
研究领域:
材料科学
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表面工程
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腐蚀与防护
·
电化学
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DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Ying Wang,Yan Zhang,Xingyi Zhou,Yang Cheng,Lin Liu,Xiaobing Zhao,Ningyi Yuan,Jianning Ding
The high active chemical properties of magnesium (Mg) alloys result in poor corrosion resistance, limiting their applications. Herein, a tri-layer composite coating with strong bonding force containing layered double hydroxide (LDH), 3-aminopropyltriethoxysilane (APS) and graphene oxide (GO) was fabricated onto the AZ31B Mg alloys surface by in-situ growth and self-assembly methods. The results showed that the corrosion resistance of Mg alloy was greatly improved after coated with the three-layer composite coating. Compared with Mg alloy, the corrosion current density of LDHs-APS/GO composite was reduced by 4 orders of magnitude. It was related to the synergistic effect of the strong binding force, the ion exchange capacity and the good barrier effect of the composite coating.
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DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2022
·Vol. 25
·期 10
·2201573
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IF 4.122
Xingxing Yin,Bingfeng Li,Shuaiya Xue,Peng Mu,Jian Li
Incorporating MXene nanomaterials in coating is an effective strategy to fabricate anticorrosive coatings with superior corrosion resistance, depending on its characteristic structure and nature. However, it may accelerate the corrosion rate of metal once forming galvanic corrosion by direct contact with the substrate due to its high conductivity and hydrophilicity. Herein, 1H,1H,2H,2H-perfluorodecyltrichlorosilane (PFDTS) is used to functionalize Ti 3 C 2 T x nanosheets to obtain superhydrophobic Ti 3 C 2 T x hybrids, which greatly enhances the hydrophobicity of Ti 3 C 2 T x nanosheets. Then, a new strategy is designed to construct superhydrophobic Ti 3 C 2 T x /epoxy/cerium conversion (STECC) composite coating with sandwich-like structure, which consists of bottom cerium conversion coating, intermediate epoxy coating, and top superhydrophobic Ti 3 C 2 T x coating layer. The underlying cerium conversion layer and intermediate epoxy coating acted as the protective coating not only improve the corrosion protection ability of substrate but also isolate the top superhydrophobic Ti 3 C 2 T x layer from direct contact with the substrate, which can eliminate direct contact between MXene and Mg alloy to further restrain the corrosion–promotion effect of Ti 3 C 2 T x . The STECC with unique structure exhibits excellent water repellency, robust mechanical and chemical stability. Electrochemical experimental results demonstrate that the modified MXene nanosheets can remarkably improve the corrosion protection performance of STECC composite coating, and the impedance modulus of STECC coating reaches the value of approximately 7.49 × 10 6 Ω cm 2 and increases four orders of magnitude compared with the Mg substrate. The composite coating studied here may offer valuable insights and inspiration toward developing MXene-based coating for high-performance anticorrosion.
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高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 16
·2310
·
IF 5.3
Hao Wu,Ke Xi,Yan Huang,Zena Zheng,Zhenghua Wu,Ruolin Liu,Chilou Zhou,Yao Xu,Hao Du,Yansheng Yin
The growing demands for material longevity in marine environments necessitate the development of highly efficient, low-cost, and durable corrosion-protective coatings. Although magnesium alloys are widely used in the automotive and aerospace industries, severe corrosion issues still hinder their long-term service in naval architecture. In the present work, an epoxy composite coating containing sericite nanosheets is prepared on the AZ31B Mg alloy using a one-step electrophoretic deposition method to improve corrosion resistance. Due to the polyetherimide (PEI) modification, positively charged sericite nanosheets can be highly orientated in an epoxy coating under the influence of an electric field. The sericite-incorporated epoxy coating prepared in the emulsion with 4 wt.% sericite exhibits the highest corrosion resistance, with its corrosion current density being 6 orders of magnitude lower than that of the substrate. Electrochemical measurements and immersion tests showed that the highly orientated sericite nanosheets in the epoxy coating have an excellent barrier effect against corrosive media, thus significantly improving the long-term anti-corrosion performance of the epoxy coating. This work provides new insight into the design of lamellar filler/epoxy coatings with superior anticorrosion performance and shows promise in the corrosion protection of magnesium alloys.
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhiqiang Qian,Shidong Wang,Xiushen Ye,Zhong Liu,Zhijian Wu
A spraying method has been employed to prepare silica-based superhydrophobic coatings on AZ31B Mg alloy surfaces. Both nanometer and micrometer silica particles were used to construct the micrometer and nanometer scale binary structures, and 1H, 1H, 2H, 2H-Perfluorooctyltriethoxysilane (PFOTES) was used as the fluorine silane coupling agent. The coatings were characterized using the techniques of Field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared (FTIR) spectra. The corrosion resistance properties of the prepared superhydrophobic surfaces were checked based on polarization curves. And their wetting properties were studied for aqueous solutions of HCl, NaOH, NaCl, MgCl 2 , NaI, CH 3 COONa, C 2 H 5 OH, C 17 H 33 COONa, and sodium dodecylbenzene sulfonate, respectively, with contact angle and sliding angle as the parameters. In contrast with the bare magnesium alloy AZ31B, after coating, the corrosion current density shows a more than three-order of magnitude smaller value, and the water contact angle increases from ∼32° to over 155°. Solution pH and coexisted NaCl, MgCl 2 , NaI, and CH 3 COONa salts have little effect on the wetting properties of the prepared superhydrophobic surfaces. On the contrary, coexisted C 2 H 5 OH, C 17 H 33 COONa, or sodium dodecylbenzene sulfonate has an obvious effect on the wetting properties. The differences in the wetting properties were explained by considering the interactions between the superhydrophobic surfaces and the surfaces of the solution droplets. In addition, the superhydrophobicity coating also exhibited good mechanical, chemical and environment stability in the abrasion test, immersion test, salt spray test, etc.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fuzhen Li,Ruixue Sun,Kezheng Chen
In this work, the anodized coating was firstly prepared at low voltage on AZ31B Mg alloy , and followed by one-step hydrothermal treatment to produce stearic acid modified CeO 2 coating with superhydrophobic performance. The anodized coating prepared at low voltage combined well with the substrate without obvious micropores and microcracks . The outer stearic acid modified CeO 2 coating with spherical morphology covered the inner anodized coating compactly. The composite coating showed excellent superhydrophobicity (CA=164.7º) and self-cleaning performance. Meanwhile, the corrosion resistance of the substrate coated with the composite coating had been significantly improved. When the composite coating is scratched, the Ce ions might gradually release from the coating and convert into newly formed Ce-based compounds to prevent the further corrosion, exhibiting a self-healing behavior.
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Luyao Xu,Xiaojing Fu,Huijuan Su,Huilai Sun,Ruichuan Li,Yong Wan
This study is aimed at the enhancement of the corrosion and tribocorrosion performance of AZ31B magnesium (Mg) alloys after plasma electrolytic oxidization (PEO) treatment. Some PEO-treated Mg samples were coated with chitosan (CS) film by dip-coated method, while others were subjected to hydrothermal treatment (HT) followed by CS film. The microstructure and chemical composition of coatings were investigated via X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy . Corrosion resistance of the specimens was evaluated via electrochemical measurements (open circuit potential and electrochemical impedance spectroscopy) in simulated body fluid. The tribocorrosion performance was determined by simultaneously recording the variation of the friction coefficient and the open circuit potential with the sliding time. The results indicated that better corrosion and tribocorrosion performance were observed when CS layer is applied on hydrothermally treated PEO samples than on the bare PEO samples. Thus, fabrication of hydrothermally treated PEO surface coatings with chitosan is a significant approach to protect the Mg from corrosion and tribocorrosion, thereby increasing the potential application of Mg alloy as biological implants .
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Haoyuan Fan,Jie Cheng,Ru Bai,Ning Li,Li Wang
Conventional self-healing anti-corrosion coatings face limitations in corrosion inhibitor release kinetics, triggering conditions, and inhibition efficiency, which compromise their protective effectiveness for magnesium alloys. In this study, we developed a novel dual-functional PEO/EP@PIN composite coating with salt-responsive self-healing properties. The coating system innovatively combines a plasma electrolytic oxidation (PEO) interlayer with an epoxy (EP) topcoat embedded with polyaniline (PANI) microcapsules containing 1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (IN) ionic liquid corrosion inhibitor. The PANI microcapsules enable rapid Na + -triggered inhibitor release in high-salinity environments, while the PEO layer ensures robust interfacial adhesion to the Mg substrate. Electrochemical tests demonstrated that the coating achieves an ultralow corrosion current density of 6.26 × 10 −11 A·cm −2 , representing a 7-order-of-magnitude reduction compared to bare Mg alloy, while maintaining a high impedance modulus of 8.97 Ω·cm 2 after 30 days of immersion in 5.0 wt% NaCl solution. Scratch-healing experiments and XPS analysis revealed that the released IN inhibitor forms Mg-N/S chemical bonds with the substrate and generates hydrolyzed Mg(OH)₂ barrier phases, effectively blocking corrosive media penetration. This work elucidates the salt-responsive and self-healing mechanisms of the coating, providing new insights for developing smart anti-corrosion coatings for magnesium alloys.
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高影响因子
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
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