SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Jun-wei Wang,Cui-zhen Zhang,Zhuo-hua Li,Hong-xia Zhou,Jia-xin He,Jing-chao Yu
As a solar energy storage medium at moderate-to-high temperature, molten chlorate severally corrodes metal vessels. The corrosion behavior and mechanisms of pure nickel (Ni), GH4033 and GH4169 in 793 K molten eutectic NaCl-MgCl 2 were studied. During the initial stage of corrosion, pure Ni and GH4033 gain weight from the many plate-like shells formed on the sample surface. After corrosion for 40 h, all sample surfaces were rather porous and loosened. MgO nuclei that were attached to the loosened microstructure surface fell off with the microstructures, which led to a continual decrease in the sample weight. The three sample surfaces were mainly composed of MgO and Ni or (Ni, Fe) from the sample substrate. Al and Ti were preferentially oxidized and stably excited on the GH4033 surface, which inhibits the corrosion process. The corrosion rate of GH4169 was the highest for the δ phase, which is rich in Nb, and phase boundaries were corroded preferentially. In the anode reaction, metal atoms escape from the corrosion system in the form of chlorides or aqueous chlorides.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Jun-wei Wang,Hong-xia Zhou,Cui-zhen Zhang,Wen-ning Liu,Bai-yao Zhao
As a thermal energy storage medium (TESM) at moderate-high temperature of concentrating solar power (CSP), the molten NaCl-MgCl 2 has sharp corrosive action on a metal container. The influence of MgCl 2 content on a metal corrosion behavior is not clear. The corrosion behavior of a Fe based alloy (GH1140) in molten NaCl-MgCl 2 (at 1123 K) with different content of MgCl 2 (wt%：0.0，48.9，61.0，93.6) were studied by the submergence corrosion experience. Results show that: after corrosion for 5 h, there is a negative correlation between the weight loss of samples and the content of MgCl 2 . In the molten salt without MgCl 2 , the sample was corroded according to the mechanism of “dissolution as anode- oxidizing- peeling off of oxide film”. After adding a little MgCl 2 in the molten salt , an unprotected MgO shell was formed on the sample surface. The samples weight decreased and obeyed a line law. The elements of Fe and Cr deplete in the corrosion layer. Corrosion mechanism is “dissolution as anode- oxidizing- reduction- chlorination”. When the content of MgCl 2 is very high in the molten salt, partial pressure of Cl 2 increases. The corrosion mechanism is similar to what in the molten salt with a little MgCl 2 , but the chlorination reaction is more severe.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2020
·
IF 4.972
Jia-Nan Yan,Bin Nie,Xin-Yu Jiang,Jia-Run Han,Yi-Nan Du,Hai-Tao Wu
The complex coacervation between scallop Patinopecten yessoensis male gonad hydrolysates (SMGHs) and κ -carrageenan ( κ -C) as influenced by ionic strength (NaCl and KCl) were monitored by using turbidimetric analysis at pH 1–12. The optical density of SMGHs/ κ -C complexes initially increased at lower ionic strength (0–0.5 M) whereas decreased at higher ionic strength (0.5–1.5 M) as a result of the salt-enhanced and salt-reduced effect, respectively. Both of pH c and pH φ1 exhibited ionic strength-dependent behavior that firstly shifted to acidic pH followed by an increase as salt increasing. Moreover, salt addition strongly promoted the gelation of SMGHs/ κ -C which was mainly driven by electrostatic forces, as reflected by increasing storage modulus G' from 3621 to 6559 Pa, 2681–25631 Pa at 0.1 Hz and decreasing T 23 relaxation time from 349.10 to 296.89 ms, 241.07–186.89 ms by 0–0.5 M NaCl/KCl, respectively. Furthermore, the rheological and relaxation time T 2 data were well associated with microscopy images that SMGHs/ κ -C gels with NaCl/KCl showed a denser network with more flocculation formation and larger pore sizes with thicker network wall, especially in KCl group, which indeed supported the gel elasticity. Taken together, this study could provide theoretical and methodological basis for new functional hydrogel products with modified gel strength and microstructure by understanding the complex coacervation in gel system.
研究领域:
食品科学
·
化学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Na Li,Yaru Peng,Zeng Chen,Wenjuan Xiong,Jiaqi Sun,Yiming Chen,Putao Zhang,Meiyue Liu,Shengjun Li
The electro-deoxidation of MgO does not proceed efficiently due to the electrical insulation properties of MgO and large molar volume of metallic magnesium. In this experiment, an attempt was done to prepare Mg-Zr alloy from their oxides using the method of electro-deoxidation. The electrochemical mechanism of the deoxidation process of MgO, ZrO 2 and MgO-ZrO 2 composite was studied through cyclic voltammetry using metallic cavity electrode (MCE). There was an intermediate phase (Zr 3 O) in the reduction process of ZrO 2 . The electro-deoxidation of MgO occurred for MgO-ZrO 2 composite in CaCl 2 -NaCl molten salt. Moreover, the electro-deoxidation of MgO was promoted by the addition of polyvinyl butyral (PVB). The formation of metal phase Mg was confirmed by XRD, EDS, Raman spectroscopy, and inductively-coupled plasma spectroscopy. The electro-deoxidation products showed significant differences with the concentration of PVB and the ratio between MgO and ZrO 2 . The electro-deoxidation of MgO and ZrO 2 was favorable when the PVB concentration was 5.0% (wt.%). Pure metal phase of Mg-Zr alloys was formed when the molar ratio of MgO and ZrO 2 was 1:2. The atomic fraction of Mg in the electrolytic product was ca. 28.0 mol.%. This work shows that MgO could be directly electro-deoxidized to Mg without the formation of intermediate phase oxide.
研究领域:
材料科学
·
冶金工程
·
无机化学
·
电化学
·
金属合金制备
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jingrui Hu,Zaihua Duan,Chong Tan,Yi Wang,Zhen Yuan,Yadong Jiang,Huiling Tai
Recently, the self-powered electrochemical humidity (ECH) sensors have received extensive attention. In this work, a self-powered ECH sensor is constructed based on cellulose nanocrystals (CNC)/NaCl humidity sensing material, and Cu and Zn electrodes. The results show that the proposed CNC/NaCl ECH sensor has good humidity sensing and power generation performances. Specifically, it has a wide humidity detection range (10.9 %–91.5 % relative humidity (RH)), fast response/recovery speed (27/22 s), and good linearity (41.1 %–91.5 % RH) at room temperature of 25 °C. A single CNC/NaCl ECH sensor can achieve high response voltage of 0.62 V, large short-circuit current (∼20 μA) and load power (∼4.48 μW) at 91.5 % RH. In addition, this work verifies the potential application of the CNC/NaCl ECH sensor in respiratory rate detection.
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2019
·Vol. 72
·期 12
·4288-4295
·
IF 2.305
Zhang Jia-Wei,Li Ying,Ding Yu-Shi,Pan Ke-Feng,Zhao Qing
Poly( o -phenylenediamine) was synthesized in different inorganic acid media, hydrochloric (HCl), nitric (HNO 3 ), and phosphoric acid (H 3 PO 4 ).
The aim was to investigate the protective effect of doped coatings on mild steel in an aggressive environment. The synthesized doped-PoPD products were characterized by x-ray diffractometry, Fourier transform infrared spectroscopy, scanning electron microscopy, and cyclic voltammetry. The inhibition abilities of doped coatings were evaluated by potentiodynamic polarization measurements and electrochemical impedance spectroscopy in 3.5% NaCl solution. In the present article, the lowest corrosion current and highest protection efficiency of the doped polymer were observed for the polymer synthesized in HNO 3 medium. The results showed that good protection of mild steel can be achieved by PoPD coating doped with inorganic acid in 3.5% NaCl solution.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Fei Xue,Yutong Hou,Qiushi Li,Jihui Wang,Wenbin Hu
The corrosion-resistant behavior of the films was investigated in conjunction with the principle of resistive switching, and the films were subjected to continuous repair by modulating the oxygen vacancies. Zn 1- x Ce x O resistive switching film was prepared on SS304 surface by one-step hydrothermal method combined with the following heat treatment. The surface morphology, crystal structure, composition, oxygen vacancy concentration and semiconductor type of Zn 1- x Ce x O film were determined. The corrosion resistance and resistive switching properties of Zn 1- x Ce x O films were measured by electrochemical tests, immersion experiment and resistive switching experiment. The oxygen vacancy formation energy, surface adsorption energy and diffusion energy barrier energy of Zn 1- x Ce x O film were calculated by density functional theory (DFT). The experimental results show that with the increasing of Ce doping concentration, the nano-flowers on the surface of Zn 1- x Ce x O film become sparse, and the lattice constants a and c increase, the oxygen vacancy concentration of the film gradually increases, while the corrosion resistance of Zn 1- x Ce x O film decreases. The corrosion resistance of Zn 0.98 C e0.02 O film is the best (99.36%). During resistive switching process, the polarization treatment will promote the conversion of Ce 3+ to Ce 4+ in film, reduce the formation energy and diffusion barrier of oxygen vacancies, and thus promote the formation and migration of oxygen vacancies in film and then convert the film into a low resistance state. Zn 1- x Ce x O films can stably switching between high and low resistance states, maintaining excellent corrosion resistance, which is of great significance for expanding the application of resistance switching principles in the field of corrosion protection.
研究领域:
材料科学
·
腐蚀与防护
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 5
·1094
·
IF 3.1
Lincai Peng,Shaomu Wen,Jing Yan,Huali Yu,Zhan Wen,Zhi Wang
Carbon dioxide corrosion presents a significant challenge in the oil and gas field. This study simulates the corrosive environment characteristics of oil and gas fields to investigate the corrosion inhibition properties of three triphenylmethane dyes. The inhibitive performance and mechanisms of these dyes were analyzed through weight loss and electrochemical testing, revealing that crystal violet (CV) exhibited a superior inhibition effectiveness over malachite green (MG) and Fuchsine basic (FB). At a concentration of 150 ppm in a CO2-saturated 5% NaCl solution at 25 °C, CV achieved an impressive maximum inhibition efficiency of 94.89%. With the increase in temperature, the corrosion rate slightly decreased, and the corrosion rate was 92.94% at 60 °C. The investigated CV acted as a mixed-type corrosion inhibitor and its protection obeyed the Langmuir adsorption isotherm. The corrosion morphology was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and confocal laser scanning microscopy (CLMS). Quantum chemical calculations and molecular dynamics simulations were employed to validate the corrosion inhibition mechanisms, providing guidance for the further application of these dyes in corrosion control.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Hao Lu,Shengtao Zhang,Weihua Li,Yanan Cui,Tao Yang
As a vital derivative of graphene, graphene oxide (GO) is widely applied in various fields, such as transparent electrodes, solar cells, energy storage, and corrosion protection due to the large specific surface area and abundant active sites. However, compared with graphene, the application of GO has been less reported in metal corrosion protection field. Therefore, in our study, 3-aminobenzenesulfonic acid was selected to combine with oligoanilines to fabricate the GO-based sulfonated oligoanilines coatings for marine corrosion protection application. The obtained composite coatings were covered on the surface of Q235 steel, which is one of the most important structural marine materials. Fourier transform infrared spectra were utilized to prove the existence of different bonds and functional groups of aniline trimer and sulfonated aniline trimer (SAT). Scanning electron microscopy was applied to verify the combination of GO and SAT. What’s more, transmission electron microscopy was applied to observe the surface appearance of the obtained GO–SAT composite material. Besides, the results of electrochemical measurements performed in 3.5 wt % NaCl solution showed excellent corrosion-protective properties of GO/SAT-coated epoxy resin with a dosage of 10 mg of GO compared with the pure epoxy resin. Moreover, the enhancement of surface hydrophobic property, to some extent, is in favor of preventing the absorption of corrosive medium and water molecules revealed by contact angle test. The addition of GO can make the diffusion pathway of the corrosive medium longer and more circuitous, while SAT has displayed excellent solvent solubility while maintaining corrosion-protective properties similar to those of polyanilines so that the corrosion-protective properties of the modified coatings improve significantly due to the synergistically enhanced corrosion protection of GO and SAT.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 12
·123509
·
IF 4.316
Xianglin Liu,Yongsong Ma,Peng Li,Huayi Yin,Dihua Wang
MoB2 is synthesized by the electrochemical reduction of solid MoS2/B mixture in molten NaCl-KCl at 700 °C. Unlike the traditional methods, the electrolysis method employs the low-cost MoS2 feedstock and the boronization reaction happens at a low temperature of 700 °C. The electrochemically induced boronization involves two steps: the electrochemical desulfurization to generate Mo and the reaction of Mo with B to form MoB2. The S2− released from the reduction of MoS2 transfers to the carbon anode and is oxidized to sulfur gas, realizing a green synthetic process. In addition, the influences of molar ratio of MoS2 and amorphous boron and electrolysis cell voltage on the phase composition and morphology of electrolytic products were studied. The obtained MoB2 particles possess a uniform nodular morphology. Overall, this paper provides a straightforward and green process to prepare MoB2 nanoparticles using economically affordable raw materials at low temperature, and this method can be extended to prepare other borides.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Zebang He,Zhong Wu,Zhiming Gao,Zhenbo Qin,Juntao Yuan,Yuan Gao,Yaorong Feng,Anqing Fu,Chun Wang,Wenbin Hu
A Ni-Al-Cu coating was prepared on NAB alloy through electroplating and heat treatment, and the erosion-corrosion behaviors were investigated. The results demonstrated that Ni-Al-Cu coating exhibited higher erosion resistance compared to NAB alloy, with an average reduction of 63 % in material removal rate (MRR). It was revealed that deformation and cracks were observed in NAB, with loss of hard κ and β phases alongside deformation of ductile α phase. Meanwhile, Ni-Al-Cu coating experienced fatigue delamination and grain disintegration due to alternating stress. Taguchi design method showed that increasing flow velocity and sand concentration could enhance the intensity of gravel impact, while changes in the erosion angle affected gravel impact modes and energy transfer, thereby impacting corrosion performance. Additionally, empirical equations for the material removal rate were derived through regression analysis, which became possible to predict the MRR under different influencing factors and assess the erosion-corrosion resistance of materials.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
FOOD SCIENCE AND BIOTECHNOLOGY
·
2024
·
IF 2.4
Zhang Jinhua,Bi Penghui,Guo Jiamin,Zou Jinhao,Wang Xuping
The objective of this research was to present an alternate approach for enhancing the emulsification and gelation properties of porcine MP under low NaCl conditions (0.1 M). This was achieved by utilizing lipoxygenase from Volvaria volvacea ( vv LOX). Addition of vv LOX from 0 to 1000 U/mL, gradually decreased the protein particle size, polydispersity index, and zeta potential values at same time increased the emulsion activity and stability index of the MP emulsion. Additionally, the gel strength and water holding capability of the MP gel also increased. At a concentration of 0.1 M NaCl, the application of vv LOX treatment resulted in a compact gel matrix for the MP gel, as evidenced by measurements of dynamic viscoelasticity and microstructure. The mechanism of enhancing emulsification and gelation properties by vv LOX addition could attribute to decreasing the dispersion of particle sizes and increasing the repulsive forces between droplets.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）