Metals
·
2022
·Vol. 12
·期 5
·871
·
IF 2.695
Cui Wang,Jianliang Zhang,Wen Chen,Xiaolei Li,Kexin Jiao,Zhenping Pang,Zhongyi Wang,Tongsheng Wang,Zhengjian Liu
The corrosion resistance to molten iron of four kinds of carbon bricks used in blast furnace hearth were investigated to elaborate the corrosion mechanism through the macroscopic and microscopic analysis of carbon bricks before and after reaction and thermodynamic analysis. The macroscopic analysis showed that brick A had the lowest degree of corrosion and highest uniformity at different heights, attributing to its moderate carbon content of 76.15%, main phases of C, Al2O3, SiC, and Al6Si2O13(mullite), and lower resistance to molten iron infiltration, etc. The microscopic analysis showed that all the carbon bricks had more and larger pores than the original carbon bricks. The phenomena of the iron beads adhering to carbon brick and iron infiltration were observed between the interface of carbon brick and molten iron. In addition, the obvious corrosion process was presented that the carbon matrix was broken and peeled off during the iron infiltration process. For the carbon brick being corroded, the dissolution of carbon was the predominant reaction. The higher the carbon solubility of the molten iron, the easier the corrosion on the carbon brick. Al2O3and SiC enhanced the corrosion resistance to molten iron of carbon bricks, and SiO2could react with carbon to form pores as channels for the penetration of molten iron and increase the corrosion on carbon bricks. A higher graphitization degree of carbon bricks was beneficial to lessen their corrosion degree. The corrosion on carbon bricks by molten iron could be attributed to three aspects: carburization, infiltration, and scouring of molten iron. The carburization process of molten iron was the main reaction process. The molten iron infiltration into the carbon bricks facilitated the dissolution of carbon and destroyed the structure and accelerated the corrosion of the carbon bricks. The scouring of molten iron subjected the iron–carbon interface to interaction forces, promoting the separation of the exfoliated fragmented carbon brick from the iron–carbon interface to facilitate a new round of corrosion process.Keywords:carbon brick;corrosion resistance to molten iron;carburization;iron infiltration
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
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Xingtao Cheng,Yi He,Siming Yan,Liping Yan,Zhiyuan Li,Shijun Xu,Kaijun Wei,Yi Fan,Quangang Chen,Wanwan Peng
Wear and erosion are common issues encountered when applying metal components in harsh marine environments. In this study, N-MX@ZnO materials were prepared by a synergistic modification of Ti 3 C 2 T x using ethylenediamine and zinc oxide quantum dots. Subsequently, the Ni-Cu/N-MX@ZnO coating was deposited onto J55 steel using pulsed electrodeposition, exhibiting excellent tribological properties. The toughness, wear, and seawater erosion behavior of the coatings were investigated. The results demonstrated that the COF value of the Ni-Cu/N-MX@ZnO coating was reduced by 48.23% and the impedance value was increased by 300% in comparison to the pure sample. The enhancement mechanism can be attributed to the physical barrier effect and uniform dispersion effect of N-MX@ZnO, which caused the Ni-Cu/N-MX@ZnO coatings to form a friction-transferring film during the friction process.
研究领域:
材料科学
·
表面工程
·
海洋工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 20
·2300519
·
IF 3.6
Wenjie Cheng,Caihong Xue,Guilin Zhou,Xiaomin Wang,Yong Huang,Yuehua Ma,Hui Nan,Heqi Li,Hong Lin
A new type of water corrosion-resistant coating which is similar to the “egg inlaid egg tray” structure is successfully prepared. Modified chitosan (MCS) and graphene oxide (GO) are crosslinked with waterborne epoxy resin to form a unique 3D “tray” hybrid structure, and the crosslinking reaction is catalyzed by modified nano-SiO 2 (MSiO 2 ) with an egg-like morphology. The uniformly dispersed MSiO 2 can provide crosslinking reaction sites and is firmly “fixed” in the composite coating, thus not only catalyzing the crosslinking reactions with good performance, but also improving the interaction between itself and the as-formed GO-MCS structure. Consequently, with the help of “fixed catalytic in situ crosslinking reactions” and synergistic effect between MSiO 2 and GO-MCS, the coating not only shows an improved corrosion resistance with a large impedance modulus at low frequency (|Z| 0.01 Hz ) of 1.8 × 10 6 Ω cm 2 , but also possesses good thermal stability and high hydrophobicity. The protective effect of the composite coating on the substrate is more comprehensive and multiple.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2022
·
IF 3.097
Yue Li,Xueai Li,Kexin Jin,Chunsheng Wang,Wanchun Guo,Kesong Tian,Haiyan Wang
The microwave absorbing materials (MAMs) applied in marine environment are confronted with corrosion, therefore, in order to guarantee the long-term function, the MAMs need to possess excellent microwave absorption performance and seawater corrosion resistance simultaneously. Carbonyl iron powder (CIP) has the characteristic of broadband response caused by magnetic loss, playing an important role in practical application as an MAM. Herein, to avoid the deterioration of microwave absorption property of CIP by seawater corrosion, protective layers of electroless plating Co(Ni) are introduced with less influence on magnetic loss. The CIP coated with Co layer (CIP@Co) shows the RL min of −57.93 dB and an effective absorption bandwidth (EAB) of 8.56 GHz, after a long-time continuous immersion in seawater, its RL min and EAB is −71.11 dB and 8.00 GHz, respectively. The EAB of CIP@Ni after immersing in seawater is also preserved 94 %, illustrating the long-life stability of the microwave absorption performance in seawater. The little effect of Co layer on the magnetic loss of CIP and the additional anticorrosion ability of electroless plating layers are two guarantees for enduring the excellent microwave absorption performance of CIP@Co in seawater. This work provides a solution to obtain MAMs with long-life excellent microwave absorption in seawater.
研究领域:
材料科学
·
海洋工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yujie Ren,Shilin Fan,Bin Zhu,Peng Yang,Jinggang Wang,Soliman I. El-Hout,Jian Zhang,Chunlin Chen
The green synthesis of 2,5-furandicarboxylic acid (FDCA), famous as a bio-based polymer monomer from the 5-hydroxymethylfurfural (HMF), offers a promising route to reduce the usage of petroleum-based polymer polyethylene terephthalate. Although the electrocatalytic preparation of FDCA rids high temperature and pressure limits, most electrocatalysts used in the HMF oxidation reaction (HMFOR) are usually fabricated in harsh conditions. Therefore, we propose a method to improve the performance of electrocatalysts in the HMFOR reaction by introducing metal salts using natural seawater as the main feedstock. The final Co-sw/NF realized a 97.4% FDCA yield and 97.3% Faraday efficiency (FE). In-situ Raman techniques identified the catalytically active species of the catalysts employed in the HMFOR process. The effect of metal salts on catalyst energy levels is discussed in detail using the ultraviolet photoelectron spectroscopy (UPS) and Tauc plot method. The adsorption performance of HMF on the catalyst was determined by calculating the d-band centers and applying open circuit potential (OCP) tests. Furthermore, we elucidate the specific mechanism in terms of electron transport pathways.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jinyu Pi,Mengjin Chen,Tianqi Chen,Qi Wang,Shijian Cheng,Chaoyang Fu
A combined experimental and theoretical study was performed on corrosion inhibition effect of 1-Phenyl-5-mercaptotetrazole (PMT) on nickel-aluminum bronze (NAB) in seawater . Gravimetric measurement and electrochemical method, such as the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), Tafel polarization curve were used to verify the corrosion inhibition effect of PMT. It was found that the corrosion inhibition efficiency (IE) of PMT achieved 94.4 %, 99.5 %, 98.7 % at a concentration of 1.12 mM, respectively. The slump of the degree of corrosion on NAB surface was also revealed based on SEM and AFM images analysis with the addition of PMT. According to the Langmuir isotherm model based on EIS, PMT was confirmed as a mixed-type corrosion inhibitor between −20 kJ mol –1 and −40 kJ mol –1 . Besides, the successful adsorption of PMT on NAB has been revealed by the results of XPS and the change of water contact angle on NAB surface. In combination XPS with quantum chemistry calculations, PMT molecules are adsorbed on the surface of NAB by the active S atom and the tetrazole ring as the major adsorption groups, thus, the protective barrier formed by PMT on the surface of NAB can effectively insulate NAB from contact with seawater. The research results in this paper have showed that PMT as a drug intermediate has an excellent corrosion inhibition effect on the NAB at extremely low concentration in seawater.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruxia Song,Shihong Zhang,Yi He,Bo Liu,Hongjie Li,Zhifei Zhang,Yahui He
In this study, a novel Ni-Cu/OH-BN(h)-PA-Zn-DCD composite coatings with excellent wear resistance and corrosion resistance was developed, which may be used in the field of seawater corrosion. By the self-assembling of phytic acid, Zn 2+ and dicyandiamide to grow PA-Zn-DCD structure onto the surface of hydroxylated BN(h) nanosheets, obtained a hybrid denoted as OH-BN(h)-PA-Zn-DCD, which was doped into Ni-Cu coating by pulse electrodeposition. The results show that OH-BN(h) and OH-BN(h)-PA-Zn-DCD hybrids affect the surface morphology, roughness, microcrystals size and thickness of the composite coatings. Simultaneously, compared with NC coating and NC/HB-1.5 coating, NC/BP-1.5 coating has the highest microhardness (559.26 Hv), the lowest friction coefficient (0.172), and the best corrosion resistance (i corr is 3.551 × 10 −8 A·cm −2 , R ct is 1.098 × 10 6 Ω·cm 2 ). In addition, the EIS results of the immersed specimens showed that the NC/BP-1.5 composite coating still has good protective ability after soaking for 15 days in simulated seawater medium (R ct is 7.434 × 10 6 Ω·cm 2 ).
研究领域:
材料科学
·
表面工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Huaming Yu,Yuejiao Chen,Weifeng Wei,Xiaobo Ji,Libao Chen
Aqueous Zn metal batteries suffer from rapid cycling deterioration due to the severe water corrosion and dendrite growth on Zn anodes. Herein, a highly antiwater Znx-diethylenetriaminepenta(methylene-phosphonic acid) interface layer with good zinc affinity and special nanoscaled 3D granular structure is designed on Zn metal to address these problems. Experimental results combined with theoretical analysis and COMSOL simulations reveal that the hydrophobic groups in such Zn-based organic complex are the decisive factor in preventing H2O from damaging Zn anode surface. The massive Zn2+ attractive sites formed by interaction of methylene-phosphonic acid groups and Zn cause ion channel for fast zinc-ion adsorption and migration. And the developed nano granular architecture on the surface induces redistributed Zn2+ ion flux to realize homogenization with smooth and compact surface deposition. Under the synergism, such modified anodes exhibit long cycling lifespan over 1300 h with a relatively low polarization voltage at 5 mA cm–2. Also, the assembled full cells (including Zn//V2O5 and Zn//MnO2 cell) based on this anode are also demonstrated. The work provides a simple, low cost, and efficient pathway by combining the two concepts of structural design and constructing protective layers on the surface to prepare high-performance Zn anodes toward prospering aqueous zinc–metal batteries.
研究领域:
材料科学
·
电化学
·
电池技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Xinting Han,Junyan Peng,Shaohua Jiang,Jian Xiong,Yu Song,Xiao Gong
Good mechanical and chemical stabilities are the key factors for the wide application of superhydrophobic surfaces. In this work, we first prepared raspberry-like hollow structured SnO2 nanoparticles using a simple hydrothermal method, followed by an annealing step. Then, the intrinsic raspberry-like hollow SnO2 nanoparticles were combined with hydrophilic SiO2 nanoparticles to construct rough surfaces with suitable hierarchical structures, and 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS-17) was used as a hydrophobic modifier of SnO2, while epoxy resin was used as an adhesive to prepare a superamphiphobic coating with good stability and durability. Such a coating can be applied on various substrates using a simple spray-coating or drop-coating method. The water contact angle and diiodomethane contact angle of the coating could reach up to ∼165 and ∼151°, respectively. After various chemical and mechanical stability tests including hot water treatment, salt water corrosion, strong adhesive tape peeling, and kneading, the coatings still remained amphiphobic. The facile fabrication of the robust superhydrophobic coating has great potential for applications in real life and industrial production.
研究领域:
材料科学
·
表面化学
·
纳米技术
·
涂层与薄膜
✓ 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）