CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Zhiqian Yu,Zhihong Liu,Fengchun Ye,Longgong Xia
Pyrometallurgical processes have been widely recognised as the preferred technology for E-scrap recycling, and E-scrap smelting is usually accompanied by the formation of high-Al 2 O 3 -content slag. However, this slag can cause problems, such as refractory wear and even accelerated failure. Therefore, the corrosion mechanism of magnesia-chrome and alumina-chrome refractories in contact with FeO x -SiO 2 -CaO-Al 2 O 3 smelting slag was experimentally studied in the range of 1300–1400 °C, in air ( p O2 = 0.21 atm) and at p O2 = 10 -7 atm. The results showed that refractory-component dissolution and new phases formation were the major causes of refractory degradation. The dissolution of the refractory components increased along with both increasing temperature and decreasing Al 2 O 3 concentration in the initial slag. When decreasing the p O2 , the dissolution of MgO and Al 2 O 3 into the slag slowed down. New phases such as forsterite, anorthite, and spinel were detected at the interface between the slag and the bulk refractory. The formation of forsterite accelerated the refractory wear, whereas the newly formed (MgO,FeO)·(Cr 2 O 3 ,Fe 2 O 3 ,Al 2 O 3 ) spinel phase acted as a protective layer against further corrosion. A lower Al 2 O 3 concentration in the slag and a higher smelting temperature both densified the formed spinel layer. Additionally, a high oxygen partial pressure was beneficial to the formation of spinel in the magnesia-chrome refractory corrosion experiments. However, a low oxygen partial pressure was favourable for the formation of spinel on the surface of the alumina-chrome refractory materials . This study provides useful information for designing refractory materials and optimizing the processing parameters of E-scrap smelting.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 13
·2203790
·
IF 27.8
Leiqian Zhang,Jiajia Huang,Hele Guo,Lingfeng Ge,Zhihong Tian,Mingjie Zhang,Jingtao Wang,Guanjie He,Tianxi Liu,Johan Hofkens,Dan J.L. Brett,Feili Lai
Rechargeable aqueous zinc-iodine batteries (ZIBs) are considered a promising newly-developing energy-storage system, but the corrosion and dendritic growth occurring on the anode seriously hinder their future application. Here, the corrosion mechanism of polyiodide is revealed in detail, showing that it can spontaneously react with zinc and cause rapid battery failure. To address this issue, a sulfonate-rich ion-exchange layer (SC-PSS) is purposely constructed to modulate the transport and reaction chemistry of polyiodide and Zn 2+ at the zinc/electrolyte interface. The resulting ZIBs can work properly over 6000 cycles with high-capacity retention (90.2%) and reversibility (99.89%). Theoretical calculations and experimental characterization reveal that the SC-PPS layer blocks polyiodide permeation through electrostatic repulsion, while facilitating desolvation of Zn(H 2 O) 6 2+ and restricting undesirable 2D diffusion of Zn 2+ by chemisorption.
研究领域:
能源材料
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 37
·20648-20654
·
IF 2.936
Zhifeng Zhang,Fengjuan Wang,Yao Liu,Shengping Wu,Weihua Li,Wei Sun,Dong Guo,Jinyang Jiang
Herein, the protective performance of a new triazole inhibitor for carbon steel was studied by electrochemical methods. Potentiodynamic polarization curves showed that the anti-corrosion efficiency improved with increasing concentrations of the inhibitor and the results show that it is 22 times corrosion resistance efficiency for inhibitor compared to bare aggressive solution. X-ray photoelectron spectroscopy showed that the film adsorbed well on the carbon steel surface. The scanning vibrating electrode technique demonstrated the corrosion process of carbon steel with and without the protection of inhibitor. Thus, a mechanism for the corrosion process was proposed and the behavior of carbon steel under the protection of the inhibitor was discussed.
研究领域:
材料科学
·
电化学
·
表面科学
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Mai Zhaoxu,Lin Yuexing,Sun Jingying,Wang Chenhui,Yang Gongzheng,Wang Chengxin
Cationic benzyltriethylammonium chloride enables high (002)-textured Zn via selective adsorption, outperforming prior additives.
In situ homogenization converts commercial Zn foil into highly (002)-textured Zn anodes without pretreatments.
Cl − -induced pitting corrosion mechanism uncovered, leading to a breakthrough in performance limits of Zn anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Yuling Lu,Yuxing Peng,Dejun Kong
A NiAlCrZrMo medium–entropy alloy (MEA) coating with solid solution was fabricated by laser cladding , which was evolved to high–entropy alloy (HEA) structure by tempering treatment for the improvement of corrosion resistance . The effects of tempering treatment on the structural evolution and electrochemical properties of obtained MEA coatings were comparatively investigated, and the corrosion mechanism was discussed with the density functional theory (DFT) calculation. The results show that the MEA structure of original MEA coating is evolved to HEA structure of tempered MEA coating by tempering treatment, which is composed of AlNi 2 Ti and Cr phases. The charge transfer resistance of tempered MEA coating is increased by ∼140 times compared with the original MEA coating, in which the diffusion of electrons is held back by its HEA structure. Moreover, the tempered MEA coating possesses higher electrochemical resistance compared with the original MEA coating, which is attributed to the AlNi 2 Ti phase of tempered MEA coating decreasing the corrosion tendency by the effect of high–entropy evolution.
研究领域:
材料科学
·
电化学
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiao Wang,Si Chen,Rui Ding,Nan Zhou,Yan Zheng,Hai-bin Yu,Bin-jun Li,Tai-jiang Gui,Wei-hua Li
Gallic acid-based epoxy resin monomer was synthesized by the natural extract of gallnut for the efficient dispersion of graphene in epoxy resin. The graphene zinc-rich anticorrosion coatings were further prepared on the basis of the graphene / gallic acid-based epoxy resin monomer dispersion system. Electrochemical experiments and spectral characterization were carried out to study the effect of graphene on zinc-rich coatings and its mechanism. Experiments showed that graphene enhanced the cathodic protection currents of the zinc-rich coatings and prolonged the cathodic protection time. Simultaneously, graphene slowed down the penetration of corrosive media into the coatings. The conductivity of graphene improved electrical contact between zinc particles as well as zinc and iron, and transformed un-activated zinc particles into activated zinc particles. The dispersed and layered structure of the graphene extended the permeation path of the corrosive medium, which resulted in reduced permeation rate and decreased water content of the coatings. It was demonstrated by the tracking of zinc corrosion products by micro-area Raman spectroscopy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2025
·Vol. 9
·期 7
·1189-1204
·
IF 6.4
Bing Wang,Yao Liu,Hong Hao,YuZhen Zhao,ZeMin He,WenQi Song,EnZhou Liu,Zhuo Li,ZongCheng Miao
Metal ion doping is an effective strategy to improve the charge carrier separation pathways in semiconductors. In this study, La3+ ions were introduced into Ag3PO4via an in situ co-precipitation method, forming p-type doped LaxAg3−xPO4 without altering the original cubic morphology of Ag3PO4. The introduction of La3+ led to a reduction in the band gap, an expansion of the light absorption range, and an increase in electron localization. Density functional theory (DFT) calculations revealed that La doping introduces new states within the band gap, facilitating energy transitions and altering the electronic structure. Time-dependent DFT (TDDFT) calculations confirmed that the introduction of La3+ enables photoexcited electrons to predominantly migrate from Ag 4d and O 2p orbitals to La 4d and P 2p orbitals. This key finding unveiled the anti-photocorrosion mechanism of LaxAg3−xPO4. Free radical capture experiments and electron paramagnetic resonance (EPR) analysis demonstrated that La doping enhances the electron migration efficiency in LaxAg3−xPO4, promoting the conversion of ˙O2− to ˙OH radicals. This study not only provides an innovative approach for the application of La-doped Ag3PO4 in environmental pollutant catalysis but also reveals a novel internal electron transfer pathway and the underlying mechanism for enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
·
理论化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hui Huang,Xiaowu Chen,Jinshan Yang,Xiangyu Zhang,Yanmei Kan,Han Luo,Xiao You,Zhiliang Hong,Shaoming Dong
The corrosion resistance of Y-Al diffused SiC ceramics (SiC-Al40Y) at 1100–1300 °C was investigated. The results show that the weight gain curves comply with the parabolic fitting formula, then the oxidation rate constant and the activation energy were calculated to be 1.653 × 10 −5 (1100 °C), 3.704 × 10 −5 (1200 °C), 9.306 × 10 −5 (1300 °C) mg 2 /cm 4 s and 154.7 kJ/mol. Compared with reported SiC (41–147 kJ/mol), the higher activation energy indicates the better corrosion-resistant performance. And it is found that the Y-Al diffusion layers can be transformed to corrosion-resistant YAlSi x O y layers under corrosive atmosphere. Eventually, based on experimental results, the corrosion-resistant mechanism is analyzed: chemical potential gradient caused by preferential oxidation of Y-Al prompts the immigration of Y-Al from matrix to surface, gradually forming a continuous Y/Al-silicate layer on the surface and thus can hinder the further corrosion of H 2 O, O 2 .
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
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Donghui Guo,Runze Jin,Baolu Shi,Xinlei Jia,Shun Wang,Baosheng Xu
Silicate is considered a promising material for environmental barrier coatings on hot-section components of aircraft engines. However, the interaction of lutetium silicate coating in the molten calcium‑magnesium-aluminosilicate exposure has not been reported yet. In this study, the interaction of nanostructured Lu 2 Si 2 O 7 /Lu 2 SiO 5 environmental barrier coatings (EBCs) with CMAS was systematically investigated at 1300–1400 °C for 25–50 h aiming to clarify the corrosion mechanism of the coatings. Results indicated that the Lu 2 Si 2 O 7 /Lu 2 SiO 5 coatings remained intact and the molten CMAS did not penetrate the Lu 2 SiO 5 layer after corroded at 1400 °C for 50 h. In addition, the recession layer and TGO layer thicknesses of the coatings after corroded at 1400 °C for 50 h were 82.5 μm and 2.27 μm, respectively. The CMAS corrosion resistance of nanostructured Lu 2 Si 2 O 7 /Lu 2 SiO 5 coating is superior to that of ytterbium silicate coatings. The results of this work highlight that the Lu 2 Si 2 O 7 /Lu 2 SiO 5 coatings with significantly enhanced CMAS resistance performance might be suitable for advanced EBCs applications.
研究领域:
材料科学
·
航空工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
X.J. Xue,J. Dong,C.Y. Zhao
Molten carbonate salt is one of the promising candidates for high-temperature thermal energy storage tailored towards advanced pumped-thermal energy storage and next generation concentrated solar power technologies. However, severe corrosion of structural materials exposed to molten carbonate salts poses one of the most pivotal threats in terms of limiting their large-scale application at ever-escalating temperatures. Here, we elaborate the compatibility of three commercial austenitic stainless steels specifically SS310, SS316L and Incoloy 625 with Li 2 CO 3 -K 2 CO 3 (28–72 wt%) eutectic salt. The corrosion behavior and corrosion mechanism of Fe-Cr (SS316L), Fe-Cr-Ni (SS310) and nickel-based (In625) alloys at 600 °C in air were also investigated. It revealed that SS310 exhibited better corrosion resistance compared to SS316 and In625, with weight loss of 23.8 mg/cm 2 and corrosion rate of 522 μm/year after 500 h of exposure at 600 °C. This implies that higher Ni content of the alloy may not necessarily improve the corrosion resistance, it is associated with the basicity of the molten and the solubility of Ni salt in the melt. ICP analysis indicated that the salts exposed to SS310 and In625 at the same exposure time both had nearly 11 times more Ni than that exposed to SS316. Precisely, it is related to the behavior of the Cr-enriched zones formed in the corrosion layers of different alloys. The corrosion mechanism of SS310 specimens in molten carbonate can be generally divided into the following steps: (i) selective oxidation of the metal elements and lithiation reactions of the metal oxides to generate a passivation scale, (ii) an ever-growing middle transition scale consisted of mixed metal oxides and lithium-containing compounds, (iii) cracking and peeling off of the corrosion scale.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 13
·C878
·
IF 3.662
Jingrong Liu,Yanhua Lei,Zhichao Qiu,Dongdong Li,Tao Liu,Fen Zhang,Shibin Sun,Xueting Chang,Runhua Fan,Yansheng Yin
The mechanism of polyaniline-grafted Graphene (PANI-Gr) nanosheets on the corrosion performance of zinc-rich epoxy primer (ZRP) coatings was studied. Highly crystalline PANI nanosheets were chemically synthesized on the modified Gr nanosheets and analyzed using Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy and high-resolution transmission electron microscopy (HR-TEM). Different from the whole coating measurements via the open circuit potential and electrochemical impedance spectroscopy (EIS) measurements, herein, we focused on the corrosive characteristics at defect areas. Potential changes of the artificial defect-included samples and localized EIS of the defect area were conducted, to investigate the impact of the PANI-Gr fragments on corrosion process. The electrochemical results indicated that a mixture of Gr at a content of 0.6% enhanced the sacrificial cathodic protection of ZRP coating due to extending its active sacrificial period. Further, the most pronounced improvement in the ZRP properties was obtained through PANI-Gr modification. A synergetic enhancement of the coating physical barrier and zinc sacrificial cathodic protection was obtained in the case of ZRP including PANI-Gr nanosheets. Thus, this study suggests a new strategy for simultaneously providing the enhanced cathodic and barrier protection activities for ZRP.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Ling Pan,Ling He,Zibo Niu,Peng Xiao,Wei Zhou,Yang Li
In this work, Yb 4 Hf 3 O 12 ceramic, a typical rare-earth hafnate, was exposed to water vapor with Al(OH) 3 impurities at 1400 ℃, and microstructural evolution and corrosion mechanisms were investigated. The long-term corrosion can be divided into initial hydration and gasification of Hf 4+ and steady-state corrosion after the formation of Al 5 Yb 3 O 12 . In the initial stage, Hf 4+ and the surrounding O 2- tend to be hydrated and then volatilized in the form of Hf(OH) 4 , causing a metastable state of Yb 4 Hf 3 O 12 on the surface. Besides, the preferential corrosion of small grains, grain boundary, and specific crystal plane on the surface and sintered and densified grains result in varied corrosion behavior from the early linear law to the later parabolic law. In the steady-state corrosion stage, due to the consumption of Hf 4+ , more vacancies promote bonding and diffusion of Al 3+ to form corrosion product (Al 5 Yb 3 O 12 ), and during this stage, regrowth and shedding of the corrosion layer reach a dynamic balance.
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）