JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Bing Xue,Mei Yu,Jianjun Liu,Jianhua Liu,Songmei Li,Liangliang Xiong
Graphene oxide (GO) was introduced into sol-gel systems to enhance the corrosion protective properties of the obtained film on AA2024-T3 aluminum alloy . The characterization of morphology, microstructure and component of the films indicated that GO covalently reacted with silanol groups from hydrolyzed 3-glycidoxypropyl-trimethoxysilane (GPTMS) monomer , forming silane functionalized GO (SGO) by C O Si covalent bonds . Corrosion protective properties of the films were evaluated through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and immersion tests studies. The results showed that the addition of GO improved the corrosion protective properties of sol-gel film distinctly by providing the good barrier property of layered GO and enhancing the cross-linking density of the film. The significant improvement of GO on sol-gel film mainly focused on the resistance and capacitance of film itself. The optimal concentration of GO addition was 0.5 mg mL −1 , at which the film was uniform and showed good corrosion protective properties in 0.05 M NaCl aqueous solution. The corrosion current density of the sol-gel film with 0.5 mg mL −1 GO was one order magnitude smaller than that of sol-gel film without GO. The protection efficiency of the film was up to 99.45%.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Tianyu Zheng,Jinyan Liu,Lu Wang,Jia Wang,Guixiao Jia
To enhance the corrosion resistance of AA2024-T3 in 0.01 mol·L −1 NaOH aqueous solution, the inhibition characteristics of the amphoteric surfactant disodium- N -dodecyliminodiacetate (RNC-12) were assessed by means of the static weight loss method, electrochemical impedance spectroscopy , potentiodynamic polarisation curves, atomic force microscopy and X-ray photoelectron spectroscopy, and the results were compared with those of sodium laurate (SL). Quantum chemical calculations and molecular dynamics (MD) simulations were also performed to predict and analyse the relationships between the molecular structure and inhibition efficiency. The results of the experiments revealed that RNC-12 achieved a higher inhibition efficiency of 91% as a valid inhibitor of AA2024-T3 in alkaline medium compared with SL (81%). The results of surface analysis showed that the two inhibitors could be well adsorbed on the alloy surface, and the degree of surface corrosion was as follows: without inhibitor >SL >RNC-12. Quantum chemical calculations and MD simulations showed that the anionic state of RNC-12 possesses a smaller band gap, larger dipole moment , and more negative energy of adsorption, indicating that RNC-12 is more easily adsorbed on the alloy surface than SL. Therefore, the experimental results were in accordance with the theoretical calculations.
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Liangliang Xiong,Mei Yu,Yingquan Li,Xiangxin Kong,Songmei Li,Jianhua Liu
Salicylaldehyde@ZIF-8/graphene oxide (SZG) nanosheets were fabricated by anchoring salicylaldehyde@ZIF-8 nanoparticles on graphene oxide. SZG nanosheets were modified by amino silane 3-aminopropyltriethoxysilane (f-SZG) to improve the compatibility with epoxy coating. Sedimentation test showed the excellent dispersion stability of f-SZG in resin epoxy even after standing for 480 h. The cross-sectional microstructure of coatings implied the strong f-SZG/coating matrix interface by transforming the cleavage fracture to the ductile. Additionally, the stimuli-responsive release to H + and Al 3+ ions of f-SZG is maintained after the silanization. Compared with other samples, f-SZG0.5 epoxy coatings show the optimal long-term corrosion protection property with the lowest reduction rate of |Z| 0.01Hz (13.6%) after 480 h immersion and the intact surface after 27d salt spray test due to the stronger interfaces of f-SZG/epoxy matrix and coating/substrate, the proper content (0.5 wt.%) and the enhanced cross-linked density of coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Jia Wang,Jinyan Liu,Xiaojuan Wang
Inhibitory effects of sodium abietate (SA) and sodium lignin sulfonate (SLS) were discussed using a series of tests and theoretical calculations. Experimental outcomes obtained via weight loss and electrochemistry data showed that SA and SLS significantly inhibited the corrosion of AA2024-T3 Aluminum alloys in NaOH media. The inhibition efficiency ( η %) for SA and SLS was up to 96.02% and 98.82% at 5 × 10 −3 mol·L −1 , respectively. SA and SLS acted as anode-dominated mixed-type inhibitors in aggressive solutions as recorded by electrochemical methods. In addition, the surface analyses further corroborated the protection of the metal surface from corrosion as added with SA and SLS that can form an adsorbed film on the metal surface. The adsorption obeyed Langmuir isotherm which illustrated the adsorptions of the SA and SLS were a mix of physical and chemical adsorptions. Moreover, the inhibition performance of both inhibitors with the molecular structure shown in quantum chemical calculations and molecular dynamics simulation found that be suitable for explaining the inhibitive action of the two. The study suggests SA and SLS as green sources appropriate for anticorrosive applications.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2019
·Vol. 16
·期 3
·881-893
·
IF 1.584
Wang Xiao-Xin,Cao Yun-Qing,Fu Hong-Li,Jiang Mei-Yan,Hu Ji-Ming
This work aimed at understanding the role of silane pretreatment layer in an organic coating system. The study consists of two parts. In the first part, the anticorrosion performance and interfacial property of silane-pretreated epoxy coatings were studied. The results showed that pretreatment with functional 3-glycidoxypropyl-trimethoxysilane (GPTMS) strongly improves the adhesion of epoxy-coated AA2024-T3 aluminum alloy due to the high interfacial compatibility between silane and epoxy coatings and that pretreatment with nonfunctional bis-1,2-[triethoxysilyl]ethane (BTSE) remarkably reduces the adhesion to the alloy because of low compatibility. Nevertheless, the BTSE film provides higher resistance to corrosion than the GPTMS-pretreated coating system, because the former is more hydrophobic and thicker.
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 THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 13
·C798
·
IF 3.014
Bing Xue,Mei Yu,Jianhua Liu,Songmei Li,Liangliang Xiong,Xiangxin Kong
3-glycidoxypropyl-trimethoxysilane (GPTMS) functionalized graphene oxide (GO) was used to synthesize graphene-based film for corrosion protection of AA2024-T3 aluminum alloy. GO covalently reacted with the silanol group from the hydrolyzed GPTMS monomer, forming silane functionalized GO (silane-GO) linked by C-O-Si covalent bonds. The silane coupling agents acted as a 'bridge' to link GO to adjacent GO and to the metal surface by covalent bonds. The corrosion protective properties of silane-GO film were determined by electrochemical measurements and immersion tests. Results indicated that silane-GO film provided effective protection for the metal substrate and the readily corrodible areas (at the periphery of protruding constituent particles). This was due to the good barrier property from layered GO, the filled defects and gaps between GO, and the enhanced adhesion strength of GO to adjacent GO and the film to the substrate. The protective efficiency of silane-GO film was up to 95.0%. The successful application of silane-GO film on AA2024-T3 aluminum alloy suggests that there is the considerable potential for broad application of graphene-based protective film on metals, even on the metals with corrosion-sensitive areas.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2026
·
IF 3.4
Ji Ying,Xie Bin,Shi Hongwei,Song Yingwei,Jiang Xindong
Fluorescent corrosion indicators can identify underlying corrosion on metallic substrates by detecting metal ions resulting from corrosion processes. Nevertheless, the direct incorporation of fluorescent probes into the coating may result in numerous adverse effects. To maximize effective application, encapsulating these probes in specific carriers is considered to be a viable technique. In this work, the design and application of a new fluorescent probe were reported, which contains o-benzylaminophenol (BC) as fluorophores and nanomesoporous silica (MSP) as carrier. MSP, characterized by an average particle size of 90 nm, was synthesized using a sol-gel process. BC was synthesized, which exhibited yellowish-green fluorescence upon the addition of aluminum nitrate, methanol, and water. A novel intelligent container with the function of early corrosion warning was developed by incorporating BC into the MSP carrier by vacuum impregnation. BC@MSP smart containers were included in the solvent-based polyurethane coatings and applied on 2024-T3 aluminum alloy. The coating is engineered to identify corrosion within 24 h following exposure to 3.5 wt.% NaCl by the formation of a complex by BC reacting with metal ions (Al 3+ ). Electrochemical impedance evidenced that the epoxy coating with 4 wt.% BC@MSP presents high corrosion resistance even after 28 d.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ran Ao,Jinyan Liu,Xiaohui Ren,Yuelong Liu,Yan Jia
In this paper, corrosion inhibition performance of Helianthus tuberosus L extracts(HTLE) and Poria cocos extracts(PCSE) alone and compounded with Na 2 SiO 3 in 0.01 mol L −1 NaOH solution on AA2024-T3 aluminum alloy was investigated by weight loss, electrochemical impedance spectroscopy, potential polarization, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), quantum chemical calculations and molecular dynamics simulations. Infrared spectroscopy was used to study the main active components in both extracts. The results revealed that when the two extracts were utilized separately, the corrosion inhibition impact was insignificant. However, when compounded with Na 2 SiO 3 , the corrosion inhibition efficiency was greatly enhanced. Fixing the concentration of Na 2 SiO 3 at 610 mg L −1 , the inhibition effectiveness rose with the increase of the concentration of the extracts, and when the concentration of HTLE, PCSE were 800 mg L −1 and 1000 mg L −1 , respectively, the inhibition efficiencies could reached approximated 98 %. The two compounds were anodic-dominant hybrid corrosion inhibitors. AFM and XPS analysis revealed that the two compounds could successfully adsorb on the aluminum alloy surface, protecting the metal from corrosion. Theoretical simulations were conducted by selecting the three major components from each of the two extracts. Quantitative chemistry calculations indicated the accepted and donated electron groups of the major components. Molecular dynamics simulations show that the primary components compounded with Na 2 SiO 3 have a higher negative adsorption energy than their action alone.
研究领域:
材料科学
·
电化学
·
量子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
H.H. Zhang,Y.W. Liu,H. Bian,Y. Zhang,Z.N. Yang,Z. Zhang,Y. Chen
Hydrophobic silane/reduced graphene oxide (rGO) nanocomposites were successfully constructed on an AA2024-T3 aluminum alloy surface using a facile co-electrodeposition process. The composition and morphology were characterized by ATR-FTIR, XRD , Raman spectroscopy , EDX , XPS and SEM. The results revealed that the implanted GO nanosheets were partially reduced and successfully covalently bonded with silanol groups to fabricate a more compact and denser coating. Electrochemical measurements demonstrated that the electrodeposited silane/rGO nanocomposite markedly decreased the corrosion rate of the AA2024-T3 alloy in 3.5 wt% NaCl solution. The protection efficiency was maintained over 96% after 120 h of exposure, presenting excellent chemical stability. Meanwhile, a sand paper abrasion test was performed to evaluate the mechanical robustness and the contact angle was reduced by only 4.5° after 150 abrasion cycles. The excellent anti-corrosion property and mechanical robustness, along with the feasible electrodeposition procedure, show its great potential for industrial applications.
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
危险品化学品经营许可证（带存储）