RSC Advances
·
2021
·Vol. 11
·期 35
·21607-21621
·
IF 3.361
Mingjun Cui,Xia Li
Novel nitrogen and sulfur co-doped carbon dots (N,S-CDs) were synthesized via a hydrothermal procedure using citric acid (CA) and thiourea (TU) as precursors, and the corresponding corrosion protection performance was first investigated for Q235 carbon steel in 1 M HCl solution. Experimental results indicated that N,S-CDs as mixed-type corrosion inhibitors could effectively prevent Q235 carbon steel from corrosion in 1 M HCl solution, and the corrosion inhibition efficiency was improved with the increase in N,S-CD concentration. The maximum value was achieved at 400 ppm of N,S-CDs at 25 °C, which was approximately 96.6%, 94.6% and 90.55%, according to the potentiodynamic polarization curves, EIS results and weight loss measurement, respectively. Additionally, with the temperature ranging from 25 to 55 °C, the inhibition efficiency obtained from the weight loss measurement was enhanced from 90.55% to 94.04%. Such superior inhibition effect was assigned to the physisorption and chemisorption of N,S-CDs on the Q235 carbon steel surface, which was also be confirmed by XPS analysis. The adsorption of N,S-CDs onto a steel substrate conformed to the Langmuir adsorption isotherm.
研究领域:
材料科学
·
腐蚀与防护
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Demian I. Njoku,Annuncieta C. Njoku,Inime I. Udoh,Paul C. Uzoma,Ini-Ibehe N. Etim,Bowen Li,Ying Li
Coatings with multiple protective properties are highly desired for anti-corrosion purposes as they overcome the limitations of conventional coatings that have limited functionality in field applications. Thus, this study describes the protective mechanisms of a new class of composite coatings fabricated by embedding benzotriazole (BTA) laden nanotubes prior-functionalized with interfacial wrappings of chitosan hydrogel (CTSH) entrapping excess crosslinking agents (glutaraldehyde (GTRA) or epichlorohydrin (EPIH)) in epoxy (E44) matrix cured with polyamide . The modification led to an improvement in the barrier and physical properties of the composite coatings and introduced shape-memory self-repairing capabilities. Long-term impedance spectroscopy (EIS) complemented with the physical property tests was employed to interrogate the improved barrier properties. The coatings' microstructure and composition analyzed with SEM and EDS reveal the shape-memory self-repairing effect which was further characterized with overtime optical snapshots of samples exposed in a salt-spray chamber. The antibacterial functionality of the composite coatings against some marine bacteria ( Marinobacter aquaeolei and Marinobacter salsuginis ) was characterized using combined SEM and confocal laser scanning microscopy (CLSM). UV–visible spectrophotometry data reveal the pH-responsive release of the entrapped functional materials from the composite coatings. The experimental findings show that the new composite coatings exhibited intriguing triple-action protective functionalities and were more effective in protecting Q235 carbon steel exposed to 3.5 % NaCl compared to the conventional epoxy coating . This suggests that comparatively, the composite coatings have promising applications in structures that are exposed to sea environments.
研究领域:
材料科学
·
腐蚀与防护
·
海洋工程
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Tianyu Zheng,Jinyan Liu,Meihui Wang,Qian Liu,Jia Wang,Yao Chong,Guixiao Jia
The corrosion resistance of Q235 steel treated with pure thiourea, dodecyl trimethyl ammonium bromide (DTAB), dodecyl dimethyl benzyl ammonium bromide (DDBAB), and their mixture (i.e. DTAB-Thiourea, DDBAB-Thiourea) in sulfuric acid was studied. Results showed that DTAB-Thiourea and DDBAB-Thiourea have strong synergistic effects (4.86 and 5.99) and could inhibit corrosion by 93.37% and 94.98%, respectively. These effects are attributed to a decrease in the steric hindrance due to changes in the molecular adsorption mode of the corrosion inhibitors . The adsorption forms of all inhibitors on the steel surface were investigated and explained using density functional theory.
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Qian Liu,Jia Wang,Yao Chong,Jinyan Liu
The corrosion inhibition efficiency of Betaine , 3-(N, N-dimethyldodecylammonio) propanesulfonate (SB3–12) and 2-(DodecyldiMethylaMMonio) acetate (BS-12) on Q235 steel in 1 mol⋅L −1 hydrochloric acid (HCl) solution were studied at various inhibitor concentration and temperature by means of the weight loss method (WLM), electrochemical impedance spectroscopy (EIS), potential polarization curve, atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS), Raman spectra , scanning electron microscopy (SEM) and electronic energy spectrum analyzer (EDS). The weight loss results showed that the increase of inhibition efficiency mainly attributed to its high concentration. While Betaine had almost no protective effect for metals, SB3–12 and BS-12 were powerful inhibitors with the inhibition efficiency of 89.06% and 95.98%, respectively at 1 × 10 −1 mol⋅L −1 at 30 °C. The blocking effect of BS-12 for metal corrosion that induced by HCl was stronger than SB3–12. The potential polarization curve potential demonstrated that SB3–12 and BS-12 were both mixed type corrosion inhibitors . The surface analysis results revealed that SB3–12 or BS-12 could be well adsorbed on the Q235 surface to form a compact membrane that is responsible for the protection of Q235 steel from corrosion. The theoretical calculations including quantum chemical calculations and molecular dynamics simulations , which based on density functional theory provided strong evidence for the close relationship between the molecular structure of inhibitor and its inhibition efficiency. Our study of corrosion inhibition efficiency of green betaine type surfactants laid a theoretical foundation for the application of betaine derivatives in metal anti-corrosion.
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Mustafa Muhammad,Shihao Hu,Ruina Ma,An Du,Mengzhe Wang,Yongzhe Fan,Xue Zhao,Huazhen Yang,Chong Chong Li,Xiaoming Cao
Phosphate-silane coatings were developed on the Q235 mild steel by incorporating poly(dopamine) modified h-BNs into the zinc phosphating bath to enhance the corrosion resistance . The effects of PDA modified h-BNs with varying concentrations (0.10–0.90 g/L) on the surface modification, and corrosion resistance of the composite coatings were investigated. Results show that denser and uniform coatings were achieved for samples containing poly(dopamine) modified h-BN. Sample 0.60 g/L attained outstanding corrosion resistance, which is in one order of magnitude lower than the pure coatings with a current density of 1.95 × 10 −5 A/cm 2 . Modified h-BN effectively accelerates and enhances the corrosion resistance of the phosphate-silane coatings.
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
·
2022
·
IF 6.267
Hanlin Shao,Xiaoshuang Yin,Kegui Zhang,Wenzhong Yang,Yun Chen,Ying Liu
In this work, N-[2-(3-indolyl)ethyl]-cinnamamide (IA) synthesized from tryptamine (TA) and cinnamic acid was evaluated as green corrosion inhibitor for Q235 steel in 0.5 M HCl solution by weight loss tests, potentiodynamic polarization (PDP) curve and electrochemical impedance spectroscopy (EIS). Gravimetric measurements displayed the maximum inhibition efficiencies of TA and IA at 1.0 mM were up to 92.8% and 97.6%, respectively. PDP and EIS studies revealed they could hinder both hydrogen evolution and metal dissolution reactions and that the inhibiting effect was temperature and concentration dependent. The surface analysis of sample was presented through scanning electron microscope (SEM), energy dispersive spectroscopy (EDX) and atomic force microscope (AFM), which indicated the anti-corrosion ability of Q235 steel in hydrochloric acid was enhanced by the inhibitor. The adsorptive behavior of inhibitors including physisorption and chemisorption obeyed Langmuir isotherm. The inhibition mechanism was elucidated by determining the potential of zero charge ( E pzc ) at solid/liquid interface. Quantum chemistry calculation provided a theoretical estimate of the reactivities of TA and IA as corrosion inhibitors to ascertain the correlation between the inhibition efficiency and molecular structures. Results of molecular dynamics (MD) simulations confirm that IA shows better inhibitive performance due to higher interaction energy (– 79.1 kJ mol −1 for TA and – 144.16 kJ mol −1 for IA).
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Ahmed O. Alnajjar,Hany M. Abd El-Lateef
Novel quaternary ammonium Surfactant, namely, N , N -dimethyl- N -(3-((2-nitrophenyl)sulfonamido)propyl)dodecan-1-aminium iodide (QAS-12) has been prepared and characterized. The inhibition performance of the individual QAS-12 surfactant and blended with nickel phosphate nanoparticles (NiPNPs) in 15% HCl on the Q235-mild steel was investigated by means of E OCP - t profiles potentiodynamic, LPR corrosion rate and EIS measurements. The findings display that the corrosion rate of Q235-mild steel is considerably decreased with rise in the surfactant dose where the protection power of QAS-12 extents a maximum value of 93.1% at 0.5 mM. Synergistic protection effect was detected between the cationic QAS-12 and the NiPNPs additives, with the maximum protection capacity as high as ~98.6%. The adsorption behavior obeyed the Langmuir isotherm model with competitive of physical and chemical adsorption between the surfactant and metal. The individual surfactant and mixed with NiPNPs performed as mixed type inhibitors. Surface morphology analysis using XPS, SEM/EDX, and UV–vis absorption studies verified the high efficiency of the cationic surfactant on the inhibition of Q235-mild steel in 15% HCl solution, and the synergistic effect on corrosion protection among the QAS-12 and the NiPNPs was confirmed. Correlation of Computational Modeling with empirical findings of the current work is discussed based on the DFT calculations and MC simulation. The proposed mechanism for the synergism resulting from both addition of the cationic surfactant and NiPNPs was also discussed according to the obtained outcomes.
研究领域:
材料科学
·
电化学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xin Li,Xin Gao,Jun Liu,Junhui Dong,Yubo Wang,Jie Chen,Changzhen Zhan,Yue Yin,Ding Nan
In recent years carbon materials, such as graphene oxide (GO) and carbon nanotube, have been became key materials for high-performance coatings for the protection of metals from corrosion. Here, a novel bi-functional epoxy coating was developed and formulated, which can replace traditional primers and topcoats. Furthermore, the effects of modified graphene oxide‑carbon black (MGC) on the corrosion resistance and weathering resistance of coated Q235 samples have been investigated using salt spray testing, UV accelerated aging testing, and electrochemical impedance spectroscopy. Results suggest that the incorporation of MGC leads to a considerable enhancement in the corrosion resistance and weathering resistance of coated samples. Notably, the bi-functional epoxy coating formulated with 0.2 wt% of MGC demonstrated the most effective anti-corrosion and weathering resistant properties. During the UV accelerated aging testing for 20 days, the low-frequency impedance modulus values of bi-functional epoxy coated samples were recorded to be 1.09 × 10 8 Ω·cm 2 , which is higher than pure epoxy coated samples (9.05 × 10 6 Ω·cm 2 ). Also, the highest adhesion strength of bi-functional epoxy coated samples decreased from 2.51 MPa to 1.97 MPa. These observations suggest that the bi-functional epoxy maintained a significant portion of its adhesion strength even after undergoing UV accelerated aging, indicating its robustness and durability under such corrosion conditions.
研究领域:
材料科学
·
腐蚀工程
·
表面涂层
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yuwei Ye,Dongping Yang,Hao Chen,Shengda Guo,Qiumin Yang,Liyong Chen,Haichao Zhao,Liping Wang
Novel N-doped carbon dots (CDs) were obtained through pyrolysis of ammonium citrate at 180 °C for 1, 2 and 3 h, and their corrosion inhibition effect on Q235 steel in 1 M HCl solution were evaluated through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (Tafel), scanning vibrating electrode technique (SVET) analysis. The changes of corrosion current density and impedance modulus of Q235 steel in inhibitor solutions showed that the as-prepared carbon dots presented a valid protective effect on steel in 1 M HCl solution. Meanwhile, the inhibition efficiency of three carbon dots exceeded 90% at 200 mg/L and the highest inhibitive efficiency was found for the carbon dots prepared at the reaction time of 2 h. The adsorption mechanism of all as-prepared carbon dots complied with the Langmuir adsorption model, containing chemical and physical adsorptions, which was also confirmed by X-ray photoelectronic spectroscopy (XPS) analysis.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2024
·Vol. 47
·期 10
·e202400203
·
IF 1.8
Jinwei Qi,Jihui Li,Kaili Liu,Huixin Zhang,Jian Han,Jianxin Chen
The curcumin-malic acid-aspartic acid polymer (PCMA) as a new water treatment agent was prepared by solid phase synthesis of curcumin, malic acid and aspartic acid. The static scale inhibition experiments showed that PCMA can inhibit CaCO 3 and CaSO 4 scale formation by 100.0 % and had excellent scale inhibition effect under various experimental conditions. The mechanism of action of PCMA was obtained by X-ray diffraction, scanning electron microscope and molecular dynamics simulation. Electrochemical test showed that PCMA is an anodic corrosion inhibitor that achieves 93.1 % corrosion inhibition by forming a protective film on the surface of Q235 carbon steel. Besides, fluorescence spectra proved that PCMA has stable fluorescence intensity.
研究领域:
材料科学
·
化学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuwei Ye,Wei Liu,Zhiyong Liu,Haichao Zhao,Liping Wang
Novel trianiline-containing sol-gel hybrid coatings were prepared by one-step electrodeposition technology on the surface of Q235 steel. The chemical component, microstructure of the as-prepared coatings were measured by FTIR, UV-vis, SEM. The effects of deposition time on the thickness, contact angle (CA) and surface roughness of coatings were investigated. The results showed that the modified silica coatings exhibited an excellent hydrophobic nature. By comparing with various deposition times (100, 300, 500, 700 s) under the deposition potential of -1.5 V, the coating under the deposition time of 500 s presented the best anti-corrosion effectiveness for bare steel substrate in 3.5 wt.% NaCl solution as verified by Tafel curves and electrochemical impedance spectroscopy (EIS).
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 & TECHNOLOGY
·
2020
·
IF 6.155
Yuwei Ye,Zilong Jiang,Yangjun Zou,Hao Chen,Shengda Guo,Qiumin Yang,Liyong Chen
An eco-friendly and effective corrosion inhibitor (N-CDs) was acquired by hydrothermal method in methacrylic acid and ethyl(methyl)amine precursors. Afterwards, the weight loss and electrochemistry measurement were chosen to appraise the corrosion inhibition behavior of as-prepared N-CDs for Q235 steel in Cl − contained solutions. The change rules of EIS and Tafel data displayed that the as-prepared N-CDs revealed a high-efficiency protection for steel in all test environments. Meanwhile, the inhibition efficiency of steel reached up to 93.93 % (1 M HCl) and 88.96 % (3.5 wt% NaCl) at 200 mg/L of N-CDs. Furthermore, the N-CDs could form the adsorption film on steel surface to avoid the strong attack of Cl − . By analysis, the adsorption mechanism of as-prepared N-CDs on steel surface was physicochemical interaction , which strictly complied with the Langmuir adsorption model in both solutions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）