EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
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2019
·Vol. 121
·期 11
·1900210
·
IF 1.852
Xiaohui Mao,Hailan Zhu,Zhong Zhao,Xiuzhu Yu
This study aims to explore the corrosion behavior of bitter almond oil (BAO) during processing. Hydrocyanic acid (HCN) and benzoic acid in oil are speculated as the main components that corrode the screw oil expeller. Immersion and simulation corrosion tests are carried out to verify this hypothesis. Immersion test results show that crude BAO (CBAO) containing 5.07 ± 0.06 mg kg −1 benzoic acid and 4.25 ± 0.04 mg kg −1 HCN exhibits corrosive effects on steel. Simulation corrosion test results indicate that the addition of CN − or benzoic acid has significant effect on the corrosion of steel. Specifically, at ≥1 × 10 4 mg kg −1 benzoic acid concentration or ≥5 mg kg −1 CN − concentration, the mass of steel blocks in oil decreases and the contents of Fe, Zn, Al, and Mg ions in oil increase significantly. Therefore, HCN in CBAO is the main cause of screw oil expeller corrosion in BAO processing and benzoic acid is the secondary cause. Practical Applications : The corrosion behavior of CBAO not only damages the integrity of the screw oil expeller but also increases the dissolution of toxic metals from the components into oil. The study of corrosion has practical value in taking effective measures, such as detoxification before pressing and addition of natural inhibitors, to reduce corrosion and ensure the quality of CBAO. Corrosion study provides the basis for the selection of steel materials of screw oil expeller.
研究领域:
食品科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Nan Wang,Dangsheng Xiong,Sai Pan,Yaling Deng,Yan Shi
Superhydrophobic/oleophilic coating was prepared on steel via wet chemical etching, and followed by surface modification. Surface grafting was manifested to be realized mainly on the oxidized area. Slippery liquid infused porous surface(s) (SLIPS) was prepared by infusing perfluorinated lubricant into the prepared superhydrophobic coating, to repel water, coffee, kerosene, and even hexane, suggesting a transition from superoleophilicity to lyophobicity. Furthermore, the lyohobicity was accessible only when the substrate is fluorinated. Moreover, the kinematic viscosity was demonstrated to be negatively correlated to the traveling speed of the liquids on the SLIPS.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Journal of Building Engineering
·
2023
·
IF 6.4
Xuelei Jiang,Ying Xu,Enen Li,Tianwu Wang,Wenyu Xie
Corrosion of steel materials (such as rebars and steel plates) usually occurs under coating materials . It is, with the existing non-destructive testing (NDT) technologies, difficult to accurately determine the corrosion of steel materials. The terahertz (THz) electromagnetic waves can penetrate the non-polar materials, and theoretically experience an absorption resonance with some corrosion products crystals ( i.e. , iron oxides). The THz spectroscopy has, therefore, a great application potential to characteristically identify the corrosion of steel materials. In the present study, the optical parameters and, especially, the positions of the characteristic absorption peaks of the corrosion products were systematically investigated and identified using the THz system. The experimental results showed that the refractive index of the different corrosion product samples was in the range of 2.7–3.4 in the effective frequency range of 0 THz - 1.2 THz, and the content of Fe 3 O 4 had a large influence on the optical parameters in the corrosion product mixtures. To measure the characteristic absorption peaks of the corrosion products, the effective frequency range was extended to 0 THz - 10 THz by an assembled broadband THz system. Within this range, the positions of the characteristic absorption peaks were identified as 3.4 THz, 4.2 THz, 4.85 THz, and 5.8 THz for Fe 2 O 3 , and as 3.6 THz, 4.05 THz, 5 THz, and 5.45 THz for α-FeOOH. For Fe 2 O 3 and α-FeOOH, the intensities of the absorption peaks at 4.85 THz and 3.6 THz, respectively, showed a linear relationship with the mass content. Furthermore, the THz spectroscopy could accurately identify Fe 2 O 3 and α-FeOOH in the corrosion product mixtures by comparing with the results from IR spectroscopy and Raman spectroscopy. This means that the occurrence of steel corrosion could be detected according to the characteristic absorption peaks of Fe 2 O 3 and α-FeOOH. The experimental results provide a basis for the application of THz spectroscopy in the NDT of the corrosion of steel materials.
研究领域:
材料科学
·
无损检测
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chang Chen,Feifei Peng,Ruyi Zhang,Shaowu Jiu,Yanxin Chen
Organic coatings cannot provide long-term corrosion protection to steel bars in sand-based autoclaved aerated concrete because they are prepared at high temperatures and pressures. Herein, potassium silicate, zinc silicate, and aluminum powder were used as the raw materials to prepare inorganic aluminum powder–modified zinc silicate–potassium silicate coatings with anticorrosive properties. The physical, mechanical, microscopic, and anticorrosion properties of the prepared inorganic coatings were investigated using X-ray diffraction, Fourier-transform infrared spectroscopy, Raman spectroscopy , thermogravimetry–differential scanning calorimetry, scanning electron microscopy, electrochemical impedance spectroscopy , and potentiodynamic polarization. The results showed that aluminum powder increased the density of the zinc silicate–potassium silicate coatings and significantly improved the corrosion resistance and mechanical properties of the coatings. The prepared coatings exhibited stable qualities with no heat absorption and release before 317°C. The adhesive strength and impact resistance of the coatings were as high as 1.65 MPa and 50 kg·cm, respectively. The electrochemical test results showed that the coating resistance ( R c ), charge-transfer resistance ( R ct ), and polarization resistance ( R p ) of the 5.5–50Zn 2 SiO 4 –40Al coating were 7835, 135,915, and 89,568 Ω·cm 2 , respectively, which exhibited the optimal corrosion resistance.
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 Coatings Technology and Research
·
2025
·
IF 2.8
Wang Huihui,Wang Shenglong,Hsu Wayne,Gao Lele,Wang Xinkun,Lin Fenglong,Wu Yincai,Song Lijun
This study presents the development of an advanced intumescent fire-retardant coating by integrating lanthanum hypophosphite (LaHP) into a conventional ammonium polyphosphate/pentaerythritol/melamine (APP/PER/MEL) system. LaHP was synthesized from sodium hypophosphite and lanthanum chloride, achieving a yield of approximately 65%. The synthesized LaHP was added to the coating formulation at concentrations ranging from 2 to 6 wt.% to evaluate its effects on fire resistance and thermal protection. Comprehensive testing, including fire resistance assessments and cone calorimeter tests, along with characterizations such as SEM, XRD, Raman spectroscopy, FTIR, TGA, and XPS, revealed that LaHP significantly enhanced the fire-retardant properties of the coatings. The optimal concentration of 4 wt.% resulted in a peak heat release rate (pHRR) of 37.04 kW/m 2 and a total heat release (THR) of 0.42 MJ/m 2 . Additionally, the LaHP-enhanced coating demonstrated superior thermal barrier efficiency, keeping the backside temperature of the coated steel plate below 200 °C during fire testing. Morphological analyses indicated that LaHP contributed to a denser, continuous char layer that insulated against heat and oxygen. XPS analysis confirmed the formation of a catalytic graphitized carbonaceous layer, which delayed degradation of the intumescent structure and improved fire retardancy. Briefly, LaHP proves to be an effective synergist in the APP/PER/MEL system, which markedly enhances the coating of fire protection performance.
研究领域:
材料科学
·
防火技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Meng Yang,DanDan Li,Haoyang Sun,Fan Lei,Yi Huang,Dazhi Sun
Graphene, due to its unique two-dimensional structure and superior barrier property, is considered as an excellent filler in organic coatings used for the corrosion protection of metals. However, it has also been found to promote the metal corrosion because of its high electrical conductivity. In this work, we used electrically insulated fluorographene (FG) nanoplatelets as fillers for epoxy coatings and investigated their corrosion protection properties for metals. FG was prepared by a microwave-assisted liquid phase exfoliation method and then was incorporated into epoxy matrix through an environment-friendly solventless method. The electrochemical impedance spectroscopy (EIS) and the potentiodynamic polarization measurements show that the prepared FG/epoxy nanocomposite coatings exhibit superior anticorrosion performance, which are improved by one order of magnitude compared with the pure epoxy coating. The improvement of the corrosion resistance of the nanocomposite coatings is mainly attributed to the barrier properties and electrical insulation of FG nanoplatelets. Moreover, the nanocomposite coating containing 0.5 wt% FG shows the best anticorrosion performance because of the uniform dispersion of a small amount of FG nanoplatelets in the epoxy matrix.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 10
·3835
·
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuwan Tian,Cheng Wen,Chaofang Dong,Gui Wang,Peichang Deng,Guanting Zhou
A low pH-triggered intelligent corrosion inhibitor based on BTA loaded poly(2-diethylaminoethyl methacrylate) (PDEAEMA) microspheres was designed to prevent metal corrosion in a variable pH environment. The average particle size of the microspheres was 3 μm. The microspheres swelled at low pH values and shrank at high pH values, which guarantees pH sensitivity. The BTA release from the intelligent corrosion inhibitor depends on the environment pH value. The electrochemical results revealed that the intelligent corrosion inhibitor exhibited smart and efficient corrosion inhibition performance on steel corrosion, which was attributed to the pH-dependent supply of BTA.
研究领域:
材料科学
·
腐蚀与防护
·
高分子化学
✓ 已验证
DOI
高影响因子
ENERGY
·
2025
·
IF 9.4
Jing Li,Jiawen Fu,Xin Du,Jingran Zhang,Luquan Ren
To enhance the performance of stainless steel materials in low temperature environments, a bioinspired hydrophobic surface with synergistic delayed icing/frosting properties was developed, mimicking the microstructural and chemical characteristics of natural surfaces exhibiting exceptional hydrophobicity and ice resistance. Advanced laser processing technology fabricated a precisely engineered polygonal microarray structure on stainless steel substrates. Subsequently, a nanocomposite colloidal was formulated, consisting of a TiO 2 polyurethane hybrid bonding colloid and CB-SiO 2 hybrid adhesive solution. These functional materials uniformly deposited onto the structured surface via spray coating, forming a robust, bond stabilized super liquid repellent coating with outstanding delayed icing/frosting performance. The experimental results demonstrate that the L-CB@SiO 2 SHCS exhibits superhydrophobic properties, with a static contact angle reaching up to 154.2° and a sliding angle less than 5°. Under cryogenic conditions (−10 °C and −15 °C), the surface significantly delayed ice nucleation by 6824 s and 1715 s, respectively. Moreover, the coating maintained excellent icephobicity, with water droplets completely shedding after 30 impact cycles without ice residue. Even after prolonged exposure 60 min, only a minimal frost layer formed. To elucidate the mechanistic basis of the composite colloidal film's superior anti-icing performance, comprehensive material characterization performed using XRD, FTIR and XPS. Furthermore, the coating durability rigorously assessed through sandpaper rubbing, ethanol hydrolysis, grit falling, and icing-melting cycle tests. The development of such advanced anti-icing stainless steel surfaces holds significant practical implications, as it can substantially reduce de-icing maintenance costs while extending the operational lifespan of cryogenic equipment.
研究领域:
材料科学
·
表面工程学
✓ 已验证
产品关联
DOI
高影响因子
Metals
·
2018
·Vol. 9
·期 1
·3
·
IF 1.704
Tianyu Cui,Qingsuo Liu,Xin Zhang,Dawei Zhang,Jinman Li
The formation of nanocrystalline structures in bulk metal materials is of great significance for both investigating the structural features of nanocrystalline materials and enhancing the value of bulk metal materials in engineering applications. Herein, we report a nanocrystalline structure formed by lattice transformation in a three-dimensional bulk metal material. We characterized its phase composition, three-dimensional features, and boundary structure. This nanocrystalline structure had microscale length and height and nanoscale width, which gave it a “nanoplate” structure in three-dimensional space. We observed edge dislocations in the interior of the nanocrystalline structure. A unique transitional boundary that contributed to maintaining its nanoscale size was found at the border between the parent phase and the nanocrystalline structure.Keywords:nanocrystalline structure;grain boundaries;microstructure;three-dimensional features
研究领域:
材料科学
·
冶金学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Yuanyuan Meng,Shuangxi Li,Zhi Zhang
Corrosion inhibitors play a vital role in impeding the corrosion process of steel bars within concrete structures exposed to corrosive environments. Nevertheless, conventional corrosion inhibitors pose environmental risks. In contrast, contemporary studies have explored corrosion inhibitors that are eco-friendly. However, these inhibitors are burdened by high costs and complex production processes, impeding the widespread application in concrete structures. Consequently, this study presents an innovative solution by incorporating uniconazole, an agricultural fungicide, as a corrosion inhibitor for steel bars in concrete structures. The steel bars were exposed to corrosion within a simulated concrete pore solution containing 0.6 mol/L NaCl, both with and without the presence of uniconazole. The morphology and hydrophilicity of the steel bar surface were investigated via optical microscope and contact angle experiments. Electrochemical tests (open circuit potential, potentiodynamic polarization, electrochemical impedance spectroscopy, and Mott-Schottky analysis) and X-ray photoelectron spectroscopy were employed to investigate the corrosion inhibition performance and mechanism of uniconazole. The results demonstrate that uniconazole elevates the hydrophobicity and contributes to the corrosion inhibition of steel bars. Electrochemical test results indicate that as the concentration of uniconazole increases from 1 × 10 −4 mol/L to 1 × 10 −3 mol/L, the inhibition efficiency likewise demonstrates a corresponding increase, escalating from around 50 %–90 %. Uniconazole molecules function as mixed-type inhibitors, exhibiting characteristics of both anode-type and cathode-type inhibitors. The adsorption of uniconazole enhances the stability and thickness of the passive-adsorbed layer on the steel surface, effectively impeding the charge transfer process and obstructing the interaction of corrosive substances with the base metal. In summary, the application of uniconazole exhibits the highlights of efficient, cost-effective, environmentally friendly, and the potential for scalable production. This positions uniconazole as a promising candidate for use as a corrosion inhibitor in the domain of concrete structures.
研究领域:
土木工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2018
·
IF 4.244
Yunxia Ma,Yonglei Chen,Juanjuan Liu,Yangxia Han,Sudai Ma,Xingguo Chen
As we know, hexavalent chromium (Cr(VI)) was usually used as an additive to improve the color fastness during the printing and dyeing process, and thus posing tremendous threat to our health and living quality. In this work, the dual emissive carbon dots (DECDs) were synthesized through hydrothermal treatment of m -aminophenol and oxalic acid . The obtained DECDs not only exhibited dual emission fluorescence peaks (430 nm, 510 nm) under the single excitation wavelength of 380 nm, but also possessed good water solubility and excellent fluorescence stability. A ratiometric fluorescent method for the determination of Cr(VI) was developed using the DECDs as a probe. Under the optimal conditions, a linear range was obtained from 2 to 300 μM with a limit of detection of 0.4 μM. Furthermore, the proposed ratiometric fluorescent method was applied to the analysis of Cr(VI) in textile, steel, industrial wastewater and chromium residue samples with satisfactory recoveries (88.4–106.8%).
研究领域:
环境化学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）