CORROSION SCIENCE
·
2022
·
IF 7.72
Ling He,Ling Pan,Wei Zhou,Zibo Niu,Peng Xiao,Yang Li
In this work, the corrosion behavior of Yb 4 Hf 3 O 12 ceramics under CFAS coupled with water vapor environment at 1400 °C for 2–50 h was investigated. Results show that the CFAS were rapidly dissolved into ceramics under test environment, and then the Yb-Ca-Si apatite and Hf-rich fluorite phases were re-precipitated. Simultaneously, the water vapor corrosion mainly induced grain surface corrosion, resulting in the formation of corrosion pits and ridge-like structures. Moreover, the pores and microcracks caused by water vapor corrosion offer additional penetration path for CFAS melt.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Jin Huang,Jian Zhang,Tingting Luo,Ruxia Liu,QinQin Wei,Guoqiang Luo,Qiang Shen
Corrosion test of Mo in LiF-LiCl-LiBr salt with different SO 4 2 content have been studied. MoO 2 , Mo 3 S 4 and MoS 2 was formed after corrosion. The SO 4 2- will corrode the grain boundary of Mo and lead to the decomposition of large Mo grain. Moreover, the formation of different corrosion products will lead to significant changes in volume and destroy the stable oxide layer which could be protective. The Mo will be severely corroded in LiF-LiCl-LiBr molten salt with a higher content of SO 4 2- .
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
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
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Yina Du,Ji-Xuan Liu,Yifeng Gu,Xin-Gang Wang,Fangfang Xu,Guo-Jun Zhang
Textured and untextured M n+1 AX n compounds, Ti 2 AlC and Ti 3 AlC 2 , namely MAX phases have been synthesized and examined with respect to their corrosion resistance in static supercritical water at 500 °C. The textured ceramics were obtained by hot forging process at high temperatures. Both X-ray diffraction and SEM analysis revealed well alignment of c -plane of MAX phases parallel to the hot-forging surface. Better corrosion resistance on the surface perpendicular to the hot-forged direction was verified by SEM. On the other hand, the side surfaces of the samples showed thick oxidation layers and abundant cracks. The (00 l ) faces consist of strongly bonded Ti 3 C 2 and Ti 2 C layers in Ti 3 AlC 2 and Ti 2 AlC, respectively, hence exhibit higher resistance to water corrosion. On the contrary, the side surfaces where most of weakly bonded interlayers of these hexagonal phases were exposed tend to be easily corroded especially through Al-layers. The corrosion process involved a phase transition of oxidized product, i.e. TiO 2 from anatase to rutile phase, which gave rise to the formation of cracks due to accompanied volume changes.
研究领域:
材料科学
·
腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Chang Shuangshuang,Jia Yanhong,Du Xin,Guo Shaoqiang
Pyroprocessing of spent nuclear fuels uses the LiCl–KCl molten salt as an electrolyte, which contains dissolved fission products and can be very corrosive to the structural alloys. This study investigates the effect of EuCl3 on the corrosion behavior of four commercial alloys: Haynes C276, Inconel 600, Incoloy 800, and 316L stainless steel. Static immersion tests and electrochemical polarization measurements were carried out in molten LiCl–KCl salts with and without EuCl3 additives at 500°C. The results showed that the presence of EuCl3 caused the severe dissolution of Ni, Fe, and Cr from alloys, accompanied by the cathodic reduction of EuCl3 to EuCl2. All alloys suffered from intergranular dissolution and cracking, with additional pitting and void attacks for Incoloy 800 and 316L stainless steel.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
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
Heliyon
·
2024
·
IF 3.4
Guanqi Liu,Ziyu Yan,Yuzhu Guo,Chuanbin Guo,Chengwen Tan,Jianhua Zhu,Jianmin Han
In this work, the corrosion behavior of pure Mg, Mg3Ag, Mg6Ag, and MgZnYNd alloys in different fixatives (ethyl alcohol (EA), 85 % ethyl alcohol (85 % EA), 10 % neutral buffered formalin (10 % NBF), 4 % glutaric dialdehyde (4 % GD), and 4 % paraformaldehyde (4 % PFA)) was investigated to provide a valuable reference for the selection of fixatives during the histological evaluation of Mg implants. Through the hydrogen evolution test, pH test, and corrosion morphology and product characterization, it was found that corrosion proceeded slowest in the EA and 85 % EA groups, slightly faster in 4 % GD, faster in 10 % NBF, and fastest in 4 % PFA. After corrosion, the EA group surface remained unchanged, while the 85%EA group surface developed minor cracks and warping. The 4%GD fixative formed a dense needle-like protective layer on the Mg substrate. The 10%NBF group initially grew a uniform layer, but later developed irregular pits due to accelerated corrosion. In contrast, the 4%PFA solution caused more severe corrosion attributed to chloride ions. The main corrosion products in the EA and 85%EA groups were MgO and Mg(OH) 2 , while the other fixatives containing diverse ions also yielded phosphates like Mg 3 (PO 4 ) 2 and MgHPO 4 . In 4 % PFA, AgCl formed on the surface of Mg6Ag alloy after corrosion. Therefore, to minimize Mg alloy corrosion without compromising staining quality, EA or 85 % EA is recommended, while 4 % PFA is not recommended due to its significant impact.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Haoxiong Cui,Zhong Lin,Kelin Zhu,Guoan Cheng,Xiaoling Wu,Ruiting Zheng
The comprehensive investigation was conducted to analyze the corrosion behavior and surface potential of pure copper surfaces in various acidic solutions. We carried out Zeta potential measurement, electrochemical measurement and in situ Raman spectroscopy to investigate the corrosion process and surface potential of copper in acidic solutions with different pH. It was found that the variation in zeta potential with pH corresponds to the corrosion behavior of copper during this process. In 1mmol / L aqueous chloride media, when the pH is greater than 3.5, unalloyed copper is oxidized to monovalent copper. At this stage, as the pH decreases, the zeta potential gradually increases. When the pH reaches 3.5, the Zeta potential reaches the highest, and the rate of cuprous oxide formation reaches the maximum. When the pH continues decrease, unalloyed copper begins to be oxidized to divalent copper, and the zeta potential will also decrease, the surface charge state shifts to the positive direction. Furthermore, our experimental findings are complemented by Density Functional Theory (DFT) calculations.
研究领域:
材料科学
·
电化学
·
表面科学
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Haiyang Wang,Yulai Song,Xuegang Chen,Guodong Tong,Linyang Zhang
The MgAl-LDHs film was in situ grown on the PEO film of magnesium alloy by hydrothermal growth method, and the PEO-LDHs-SDS composite film modified by sodium dodecyl sulfate (SDS) was further prepared. The results show that compared with the single-layer PEO film, the PEO-LDHs-SDS composite film exhibits excellent short-term and long-term protection performance, which can be attributed to the blocking effect of the superhydrophobic surface of the composite film, the sealing effect of LDHs on the micropores of the PEO film, and the readsorption and corrosion inhibition of SDS anions.
研究领域:
材料科学
·
腐蚀工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 12
·1026
·
IF 4.4
Shijing Xie,Min Lei,Jiawei Sun,Chongdou Yang,Wenbo Liu,Di Yun,Xiqiang Zhao,Jie Qiu
The corrosion behavior of 20G and TP347H materials was investigated in molten LiCl-NaCl-KCl salt. The corrosion rates of these materials in molten chloride salt are high and are strongly affected by the alloying surface oxide formation. The 20G shows uniform surface corrosion with almost no protective oxide formation on the surface. In contrast, the austenitic steel TP347H exhibits better corrosion resistance in molten chloride salts due to its high Cr content. Owing to the highly corrosive nature of molten chloride salts, the Cl−in molten salt could react with oxides and alloy, inducing intergranular corrosion of austenitic steel in molten chloride salt environments.
研究领域:
材料科学
·
腐蚀工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Wei Chen,Xu Liu,Zhoudong Yang,Dong Hu,Xu Liu,Xi Zhu,Xuejun Fan,Guoqi Zhang,Jiajie Fan
The power semiconductor joining technology through sintering of copper nanoparticles is well-suited for die attachment in wide bandgap (WBG) semiconductors, offering high electrical, thermal, and mechanical performances. However, sintered nanocopper will be prone to degradation resulting from corrosion in sulfur-containing corrosive environments such as offshore areas. In this study, experiments, including aging test and corrosion characterization, and simulations based on density functional theory (DFT) studies were conducted to explore the corrosion behavior and mechanism of elemental sulfur (S 8 ) and hydrogen sulfide (H 2 S) on sintered nanocopper. The experimental results indicated that loose corrosion products were observed on the sintered nanocopper during the ageing process involving S 8 , and compact layered corrosion products formed during the ageing process involving H 2 S. Furthermore, similar corrosion product compositions (Cu 2 O, Cu 2 S, CuO, CuS, and potentially Cu 2 SO 4 or CuSO 4 ) were observed in both the S 8 - and H 2 S-ageing processes. However, the S 8 -ageing process exhibited more noticeable corrosion penetration. This was explained in simulations results: the unsaturated Cu sites on the oxide layer [Cu 2 O(1 1 1)] of the sintered nanocopper could adsorb both H 2 S and S 8 , while the saturated Cu sites only exhibited the potential to adsorb S 8 .
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Guichen Song,Qihuang Deng,Bo Wang,Zhiduo Liu,Chen Ye,Xianzhe Wei,Dan Dai,Zhongbin Pan,Wei Li,Shulin Song,Li Fu,Cheng-Te Lin,Nan Jiang,Jinhong Yu
In virtue of its excellent performance and abundant surface terminations, MXenes, a newly emerged 2D materials , greatly exhibit promising applications in many fields of energy storage and electromagnetic shielding. Ti 3 C 2 , a member of MXenes, is widely investigated in recent years. However, lack for attention in thermal property and corrosion behavior. Here, Copper matrix composites were prepared by Spark Plasma Sintering , in which TiC and few-layer Ti 3 C 2 nanosheets as filler. The results exhibit corrosion resistance of the Ti 3 C 2 /Cu composites were improved compared to TiC/Cu composites, benefiting from outstanding electrical conductivity and easily oxidized property of Ti 3 C 2 . However, the thermal conductivity of Ti 3 C 2 /Cu composite with the content of 2 wt% Ti 3 C 2 improves about 15% compared to TiC/Cu composites with same content, resulting from the low inherent thermal conductivity of filler and lattice mismatch between copper and filler. Moreover, the electrical resistance of Ti 3 C 2 /Cu composites increases about 100% with the content of 2 wt% Ti 3 C 2 at interfacial contact resistance measurement compared with pure Cu. Meanwhile, the anti-corrosion performance of the Ti 3 C 2 /Cu composites was improved over pure Cu. This work will broaden appliance field of Ti 3 C 2 and lay the foundation for the future research.
研究领域:
材料科学
·
能源与环境工程
✓ 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）