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Three-dimensional modeling of effect of surface intermetallic phase on surface defects of Al-Fe-Si aluminum foils during twin-roll casting
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作者 朱远志 万强 +2 位作者 李丙亮 周峰 张雅峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第2期477-483,共7页
Scanning electron microscopy and X-ray energy dispersive spectrum analysis show that the clusters of intermetallic AlFeSi particle are distributed on or near the aluminum foil stock surfaces heterogeneously. 3D finite... Scanning electron microscopy and X-ray energy dispersive spectrum analysis show that the clusters of intermetallic AlFeSi particle are distributed on or near the aluminum foil stock surfaces heterogeneously. 3D finite element modeling shows that these clusters of hard particles induce the fracture of the nano-scale lubricant oil film at first and further lead to severe deformation in the nearby aluminum foil substrate along the rolling direction. Consequently, the optical property in this region differs from that in the surroundings, resulting in surface defects. 展开更多
关键词 Al-Fe-Si alloy precipitated phase aluminum foils lubricant oil film twin-roll cast 3D modeling
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Distribution of Microelements and Their Influence on the Corrosion Behavior of Aluminum Foil 被引量:7
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作者 Weimin MAO, Heng JIANG, Ping YANG, Huiping FENG and Yongning YUDepartment of Materials, University of Science and Technology Beijing, Beijing 100083, ChinaProf., Ph.D., 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第1期43-46,共4页
The distribution of microelement Fe, Si, Cu and Mg in the surface layer of aluminum foil annealed at 300℃ and 500℃ were determined by secondary ion mass spectrometer. The corrosion structure produced by electrochemi... The distribution of microelement Fe, Si, Cu and Mg in the surface layer of aluminum foil annealed at 300℃ and 500℃ were determined by secondary ion mass spectrometer. The corrosion structure produced by electrochemical etching was also observed. It was found that the Mg concentration at external surface was increased exponentially over the fourth degree and promoted by higher annealing temperature, which will increase the number of corrosion pits inside the large grains, and therefore the specific capacity of the foils for electrolytic capacitors. The similar effects of microelement Fe, Si and Cu were not so strong. 展开更多
关键词 Electrolytic capacitor aluminum foil Microelement Corrosion structure
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Effect of tunnel structure on the specific capacitance of etched aluminum foil 被引量:5
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作者 Ning Peng Li-Bo Liang +3 位作者 Ye-Dong He Hong-Zhou Song Xiao-Fei Yang Xiao-Yu Cai 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第10期974-979,共6页
The morphology of etched aluminum foil was observed using scanning electron microscopy, which led to the establishment of a cylindrical model and two merged models, considering the fixed weight loss of etching. The ma... The morphology of etched aluminum foil was observed using scanning electron microscopy, which led to the establishment of a cylindrical model and two merged models, considering the fixed weight loss of etching. The maximum of specific capacitance and the cor- responding optimum values for tunnel sizes at various anodization voltages were predicted. The increased size distribution and taper of tun- nels were demonstrated to decrease the specific capacitance, whereas the addition of polymeric additive into the ttmnel widening solution was demonstrated to increase the capacitance. The formation of merged tunnels on the etched aluminum surface, irrespective of the presence of row-merged tunnels or cluster-merged tunnels, resulted in a dramatic decrease in the specific capacitance. It is concluded that, enhancing the uniformity of turmel size and distribution and avoiding the formation of merged tunnels are the effective approach to achieving the higher capacitance for the tunnel etched and formed aluminum foil. 展开更多
关键词 aluminum foil pitting corrosion CAPACITANCE MORPHOLOGY electrolytic capacitors
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Effect of cerium addition on microstructure and texture of aluminum foil for electrolytic capacitors 被引量:5
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作者 王海燕 李文学 +2 位作者 任慧平 黄丽颖 王向阳 《Journal of Rare Earths》 SCIE EI CAS CSCD 2010年第1期134-137,共4页
Anode foil of aluminum electrolytic capacitor,which requires large surface area for high capacitance,were prepared by rolling,annealing and electrochemical etching.Effects of cerium addition on the capacitance of alum... Anode foil of aluminum electrolytic capacitor,which requires large surface area for high capacitance,were prepared by rolling,annealing and electrochemical etching.Effects of cerium addition on the capacitance of aluminum electrolytic capacitors were investigated.Microstructure of the aluminum foil surface was observed by optical microscopy(OM) and scanning electron microscopy(SEM).Electron back scattered diffraction(EBSD) was also employed to reveal texture evolvement of cold-rolled aluminum foil after ann... 展开更多
关键词 electrolytic capacitor aluminum foil rare earths
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Effect of Trace Sn on Pitting Behaviors of High Voltage Anode Aluminum Foil 被引量:2
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作者 Jingbo SONG Weimin MAO +1 位作者 Hong YANG Huiping FENG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2008年第5期718-722,共5页
The effect of trace Sn on the pitting morphology of high voltage anode aluminum foils was investigated. The distributions of microelement Sn, Fe, Si, Cu and Mg in the surface layer of aluminum foils with different Sn ... The effect of trace Sn on the pitting morphology of high voltage anode aluminum foils was investigated. The distributions of microelement Sn, Fe, Si, Cu and Mg in the surface layer of aluminum foils with different Sn content were determined by using a secondary ion mass spectrometer. It was found that the micro-alloyed Sn is enriched at the external surface. The mechanism of pitting behavior of trace Sn on aluminum surface is similar with that of lead. Enrichment of Sn in the surface layer provides large numbers of sites for initiation of pitting corrosion, while pitting sites appeared relatively inhomogenously in the foils without Sn. Sn, as an eco-friendly microelement, can be applied to replace Pb in improving the homogenous pitting behaviors of high voltage aluminum foils, in which the volume fraction of cube texture is not reduced. 展开更多
关键词 Electrolytic capacitor aluminum foil SN Pitting corrosion
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Ultrafine microstructure and texture evolution of aluminum foil by asymmetric rolling 被引量:1
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作者 SONG Meng LIU Xiang-hua +1 位作者 LIU Xin LIU Li-zhong 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第12期2783-2792,共10页
AA1060 aluminum foil was rolled from 4 mm to 20 μm by asymmetric rolling without intermediate annealing. The microstructures and textures were investigated. The original coarse grains with an average grain size of 60... AA1060 aluminum foil was rolled from 4 mm to 20 μm by asymmetric rolling without intermediate annealing. The microstructures and textures were investigated. The original coarse grains with an average grain size of 60 μm were refined to fine equiaxed grains with an average grain size of about 500 nm with mainly large grain boundaries. During the rolling, the intensities of copper texture C-{112}<111> and brass texture B-{011}<211> gradually increased, and most crystallites aggregated along the β and τ orientation lines. The orientation intensity reached the maximum value 26 when the foil was rolled to 500 μm, but significantly decreased to 16 when the thickness became 20 μm, and the texture mainly consisted of a rotation cubic texture RC-{100}<011>. With the combined forces including drawing, compressing and shearing, severe plastic deformation was obtained during the asymmetric rolling, promoting dynamic recrystallization at room temperature. Because of a combined force in the deformation zone and shear force along the normal direction, dynamic recrystallization occurs during the asymmetric rolling; therefore, the average grain size is significantly refined. The texture intensity of ultrathin strip first increases, i.e., work hardening, and then decreases mainly because of dynamic recrystallization. 展开更多
关键词 asymmetric ROLLING AA1060 aluminum foil TEXTURE EVOLUTION dynamic RECRYSTALLIZATION
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Icephobic performance on the aluminum foil-based micro-/nanostructured surface 被引量:1
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作者 陈宇 刘桂成 +5 位作者 姜磊 金志永 叶锋 李重基 王磊 王波 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第4期351-355,共5页
The research of superhydrophobic materials has attracted many researchers' attention due to its application value and prospects.In order to expand the serviceable range,people have investigated various superhydrophob... The research of superhydrophobic materials has attracted many researchers' attention due to its application value and prospects.In order to expand the serviceable range,people have investigated various superhydrophobic materials.The simple and easy preparation method has become the focus for superhydrophobic materials.In this paper,we present a program for preparing a rough surface on an aluminum foil,which possesses excellent hydrophobic properties after the treatment with low surface energy materials at high vacuum.The resulting contact angle is larger than 160° and the droplet cannot freeze on the surface above-10 ℃.Meanwhile,the modified aluminum foil with the thickness of less than 100 μm can be used as an ideal flexible applied material for superhydrophobicity/anti-icing. 展开更多
关键词 aluminum foil MICRO-NANOSTRUCTURE superhdrophobicity ANTI-ICING FLEXIBILITY
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Effects of HNO_3 concentration on the pit morphologies of aluminum foil etched in HNO_3–HCl and HNO_3–H_2SO_4–HCl solutions 被引量:1
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作者 Quan-xiu Yi Ye-dong He +3 位作者 Ning Peng Hong-zhou Song Xiao-fei Yang Xiao-yu Cai 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第1期70-76,共7页
In this work, the effects of HNO3 concentration on the pit morphologies of high-cubic-texture aluminum foil etched in HNO3-HCl and HNO3-H2SO4-HCl solutions were investigated. When the aluminum foil was etched in HNO3-... In this work, the effects of HNO3 concentration on the pit morphologies of high-cubic-texture aluminum foil etched in HNO3-HCl and HNO3-H2SO4-HCl solutions were investigated. When the aluminum foil was etched in HNO3-HCl solutions, the morphologies of pits transformed from irregular tunnels to typical tunnels (as inverted pyramids) and shallow cuboids as the HNO3 concentration in the etchant solution was increased. However, as the HCl concentration in the etchant solution was increased, the morphologies of pits transformed from shallow cuboids to typical tunnels (as inverted pyramids) and irregular tunnels. When the aluminum foil was etched in n N HNO3-(7.2-n) N H2SO4-0.8 N HCl solutions, the morphologies of the pits transformed from typical tunnels (i.e., the number of sub-tunnels formed on the main tunnels increased) to irregular tunnels (corrugated tnnnels and polyline tunnels) as the HNO3 concentration in the etchant solution was increased. These effects are attributed primarily to corrosion on the (100) and (010) faces of pits being accelerated and to the (001) faces be- ing prone to passivation to different degrees when various concentrations of HNO3 are added to the etchant solutions. 展开更多
关键词 aluminum foil pitting corrosion MORPHOLOGY passive films
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Multilayer aluminum composites prepared by rolling of pure and anodized aluminum foils 被引量:2
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作者 Milan T.JOVANOVI? Nenad ILI? +2 位作者 Ivana CVIJOVI?-ALAGI? Vesna MAKSIMOVI? Slavica ZEC 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第9期1907-1919,共13页
Experimental results on processing,structural and mechanical characterization of a multilayer composite based on commercially pure aluminum foils were presented.A multilayer composite was produced by hot-rolling of an... Experimental results on processing,structural and mechanical characterization of a multilayer composite based on commercially pure aluminum foils were presented.A multilayer composite was produced by hot-rolling of anodized and non-anodized aluminum foils alternately sandwiched.In addition,the same process was applied for bonding of non-anodized foils.In both cases,obtained multilayer composites were compact and sound.In order to study composites microstructural evolution and mechanical properties,optical and scanning electron microscopy(SEM),energy dispersive spectrometry(EDS),X-ray diffraction(XRD)analysis,hardness,tensile and three-point flexural tests were performed.Microstructural characterization confirmed that the rod-like particles distributed in parallel rows in the composite aluminum matrix with anodized foils correspond to Al2O3.Maximum and minimum peaks of oxygen and aluminum,respectively,suggest that after the final hot-rolling of composite with non-anodized foils,a small amount of coarser particles were formed at boundaries between foils.Hardness,strength,modulus of elasticity and flexural strength of both multilayer composites were much higher than those of pure aluminum,whereas ductility was significantly less.The composite with anodized foils exhibited the highest strength and modulus of elasticity,but lower ductility compared to composite processed from non-anodized foils.Fracture failure corresponded to the change of ductility. 展开更多
关键词 aluminum foils anodization multilayer composite Al2O3 particles strength FRACTURE
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ANALYSIS OF ROLL SYSTEM STABILITY ABOUT ALUMINUM FOIL MILLS 被引量:3
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作者 ShuXuedao ShenGuangxian 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第2期181-183,189,共4页
To improve roll system stability of aluminum foil mills, roll system stability of 2200 highspeed aluminum foil mill is analyzed with energy stable method. Two different restrictive conditions which gaps between chock ... To improve roll system stability of aluminum foil mills, roll system stability of 2200 highspeed aluminum foil mill is analyzed with energy stable method. Two different restrictive conditions which gaps between chock of work roll and window of stand whether exist or not, are studied respectively. A new concept of roll system with open /closed compound pair conies up with as well for re-newably synthesizing restrictive mechanism of aluminum foil mills' chock. Through these studies, the conflict, whether reserving the gap for the roller replacement or eliminating the gap for roller's normal work, is successfully settled. This concept and analyzed result give the actual mechanism with open/closed compound restriction and the method of realizing high-speed rolling and prolonging longevity of end thrust bearing on work roll. It has important theoretical meaning and engineering value for modern technical reform of aluminum foil mills and plate strip mills. 展开更多
关键词 aluminum foil mills Stability Open /closed compound pair
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Effect of trace Sn on corrosion behaviors of high voltage anode aluminum foil 被引量:5
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作者 宋婧波 毛卫民 +1 位作者 杨宏 冯惠平 《中国有色金属学会会刊:英文版》 EI CSCD 2008年第4期879-883,共5页
The cube texture and the surface corrosion structure of aluminum anode foil for high voltage electrolytic capacitor containing trace Sn were investigated based on quantitative texture analysis and microstructure obser... The cube texture and the surface corrosion structure of aluminum anode foil for high voltage electrolytic capacitor containing trace Sn were investigated based on quantitative texture analysis and microstructure observation under SEM. High volume fraction of cube texture over 95% and obviously higher specific capacity are obtained in the foils with less than 0.002% Sn. It is indicated that the corrosion behavior of trace Sn on aluminum surface is similar with that of Pb. Higher content of Sn over 0.002% reduces the cube texture component and therefore the specific capacity. Sn, as an eco-friendly microelement, can be applied to replace Pb in improving the homogenous pitting behaviors of high voltage aluminum foils. 展开更多
关键词 电解电容器 铝箔 腐蚀行为
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Purification of scrap aluminum foil and aluminum melt covering and protecting & atomic purification theory 被引量:7
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作者 倪红军 孙宝德 +1 位作者 刘满平 丁文江 《中国有色金属学会会刊:英文版》 CSCD 2003年第3期521-526,共6页
A new flux, JDN I, including rare earth compounds, for purification of the scraps of 99.99% aluminum foil was introduced. The experimental results indicate that its function of degassing and deoxidizing is excellent. ... A new flux, JDN I, including rare earth compounds, for purification of the scraps of 99.99% aluminum foil was introduced. The experimental results indicate that its function of degassing and deoxidizing is excellent. The hydrogen content of the scrap aluminum foil melt purified by JDN I flux decreases greatly from 4.5 mL/kg to 1.2 mL/kg at 720 ℃. The tensile strength of the samples refined with JDN I flux increases by 19.2% and the elongation increases by 38.3% in comparison with those without flux. The purification mechanism of JDN I was discussed and a theory of covering, protecting & atomic purification was also put forward. 展开更多
关键词 铝合金 净化 原子净化理论 稀土 焊剂 除气 熔炼 保护浇注
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Mechanism of strengthening of cube texture for high purity aluminum foils by additional-annealing 被引量:2
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作者 张新明 刘胜胆 +1 位作者 唐建国 周卓平 《中国有色金属学会会刊:英文版》 CSCD 2003年第3期499-503,共5页
The mechanism of strengthening of cube texture ({001}<100>) by additional annealing of high purity aluminum foils was investigated by using orientation distribution functions (ODFs) and electron back scattered d... The mechanism of strengthening of cube texture ({001}<100>) by additional annealing of high purity aluminum foils was investigated by using orientation distribution functions (ODFs) and electron back scattered diffraction (EBSD). The results of ODFs and fiber show that the orientation densities of the S {123}<634> and Cu {112}<111> components increase in both the additional annealed samples and the 0.11 mm final cold rolled foils. And the EBSD results demonstrate that cube nuclei can be identified in the deformed matrix of those additional annealed samples. It is suggested that the strengthening of cube texture can be brought out by the increasing of components of S and Cu and the formation of cube nuclei caused by additional annealing. Moreover, it is found that the cube texture increases first and then decreases with increasing additional annealing temperature, and it is the strongest at 180 ℃.The strengthening of cube texture by additional annealing is proposed as the result of oriented growth of cube subgrains. 展开更多
关键词 高纯铝箔 退火 强化机制 立方结构 ODF EBSD
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NUMERICAL SIMULATION FOR WIDE MAGNITUDE AND HIGH SPEED ALUMINUM FOIL MILL
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作者 Wang Hongxu and Lian JiachuangRolling Steel Institute, Yanshan University, Qinhuangdao 066004, P. R. ChinaZhang Junliang and Chen ShuyunBohai Aluminum Industries Company Limited, Qinhuangdao 066000, P. R. China 《中国有色金属学会会刊:英文版》 CSCD 1998年第2期70-74,共5页
NUMERICALSIMULATIONFORWIDEMAGNITUDEANDHIGHSPEEDALUMINUMFOILMILL①WangHongxuandLianJiachuangRolingStelInstitut... NUMERICALSIMULATIONFORWIDEMAGNITUDEANDHIGHSPEEDALUMINUMFOILMILL①WangHongxuandLianJiachuangRolingStelInstitute,YanshanUniversi... 展开更多
关键词 aluminum foil ROLL system elastic DEFORMATION ROLL thermal DEFORMATION shape
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Evolution of recrystallization textures in high voltage aluminum capacitor foils
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作者 刘楚明 张新明 +3 位作者 周鸿章 陈志永 邓运来 周卓平 《中国有色金属学会会刊:英文版》 CSCD 2001年第4期513-516,共4页
The evolution of recrystallization textures in high voltage aluminum capacitor foils which are produced with a high level of cold reduction was tracked by analysis of microstructure and crystallographic texture. The r... The evolution of recrystallization textures in high voltage aluminum capacitor foils which are produced with a high level of cold reduction was tracked by analysis of microstructure and crystallographic texture. The results show that the deformation textures are mainly composed of S orientation, Cu orientation and a little B s orientation. During the low temperature stages of final annealing, the iron precipitates first along the sub grain boundaries, and the Fe concentration in the matrix becomes low. Then, the cube grains nucleate preferably into the sub grains. At high temperature stages, the cube nuclei can grow preferably because of their 40°<111> orientation relationship to the S orientation, the main component of the rolling texture. Finally, the cube texture is sharply strong and the R orientation is very weak in the foils. 展开更多
关键词 aluminum capacitor foils deformation textures recrystallization textures
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Simple and Rapid Spectrophotometric Determination of Titanium on Etched Aluminum Foils
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作者 Xianfeng Du Youlong Xu +3 位作者 Li Qin Xiangfei Lu Qiong Liu Yang Bai 《American Journal of Analytical Chemistry》 2014年第3期149-156,共8页
Introduction of titanium oxides with high permittivity on etched aluminum foils’ surface has been successfully utilized to increase specific capacitance of anode foils for aluminum electrolytic capacitors. In order t... Introduction of titanium oxides with high permittivity on etched aluminum foils’ surface has been successfully utilized to increase specific capacitance of anode foils for aluminum electrolytic capacitors. In order to quantify the concentration of titanium (IV) on the etched aluminum foil precisely, a simple and rapid spectrophotometric procedure has been developed. After optimizing a series of variables including absorbance wavelength, concentration of nitric acid, concentration of hydrogen peroxide, nitration time and developing time, analytical precision and accuracy were tested by using standard working solution containing known amount of titanium (IV). The results showed that Lambert-Beer’s law was obeyed in the range of 0.01 to 3.00 mmol·L﹣1. The relative standard deviation (RSD) ranged from 0.67% to 1.09% (n = 6), and the recovery was between 99.17% - 100.03%. Investigation on effect of Al3+ ion indicated that there was no interference in the absorbance of titanium (IV) at 410 nm. The proposed procedure was applied to real samples for the determination of titanium (IV), and the results were in a good agreement with the values certified by inductively coupled plasma-atomic emission spectrometry (ICP-AES). 展开更多
关键词 TITANIUM OXIDE SPECTROPHOTOMETRY Hydrogen PEROXIDE Etched aluminum foil
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Effects of rolling technical factors on microstructures and mechanical properties of aluminum foils
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作者 毛大恒 温勇明 《中国有色金属学会会刊:英文版》 CSCD 2003年第2期239-244,共6页
The effects of rolling driving methods and technical factors on the microstructures and mechanical properties of aluminum foils based on the industrial trials were studied by TEM, tensile test and texture analysis. Th... The effects of rolling driving methods and technical factors on the microstructures and mechanical properties of aluminum foils based on the industrial trials were studied by TEM, tensile test and texture analysis. The results show that there exist obvious dynamic recovery and primary location re crystallization phenomena in the aluminum foils during high speed rolling. Meanwhile the phenomena become more obvious as the rolling speed or the reduction increases, especially in the asymmetrical rolling process with single roller driving, the dynamic primary location recrystallization is more likely to come into being. The effects of the dynamic recovery phenomena and the dynamic primary location recrystallization on the comprehensive final product ratio and the quality of aluminum foils were discussed. 展开更多
关键词 铝箔 机械性质 轧制工艺 影响因素 显微组织 变形
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PERFORMANCE OF LUBRICATING OIL FILMIN ALUMINIUM FOIL ROLLING 被引量:1
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作者 Mao, Daheng Wang, Weijuan +1 位作者 Cheng, Jun Tan, Jianping 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第1期32-37,共6页
1INTRODUCTIONTheapplicationoftechnologicallubricantinmetalrolingcandecreasethefrictiononthesurfaceofcontact... 1INTRODUCTIONTheapplicationoftechnologicallubricantinmetalrolingcandecreasethefrictiononthesurfaceofcontactarcinthedeformati... 展开更多
关键词 aluminum foil ORDERED multi layer MOLECULE film ROLLING DEFORMATION
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Homogenization of twin-roll cast AA8079 aluminum alloy studied by in-situ TEM 被引量:2
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作者 R.KRÁLÍK B.KŘIVSKÁ +2 位作者 L.BAJTOŠOVÁ M.ŠLAPÁKOVÁ M.CIESLAR 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第7期2138-2149,共12页
AA8079 is a commonly used stock material for manufacturing thin packaging foils.The primary alloying elements Fe and Si can form binary and tertiary intermetallics.In-situ TEM simulating homogenization annealing proce... AA8079 is a commonly used stock material for manufacturing thin packaging foils.The primary alloying elements Fe and Si can form binary and tertiary intermetallics.In-situ TEM simulating homogenization annealing process of the as-cast material was used to analyze the real-time changes of the shape,type,and distribution of these particles.They affect the mechanical properties of the final product and susceptibility of the material to the formation of pinholes and other macroscopic defects.Another set of as-cast samples were annealed in a regime simulating industrial treatment in combination with measurements of resistivity to validate the results of the in-situ experiment.The results show clear temperature intervals of recovery,matrix desaturation,and phase transformations occurring in several stages:spheroidization of the original particles above 450℃,nucleation of new particles at 475℃,particles coarsening above 525℃,and an entire dissolution of the original particles above 550℃. 展开更多
关键词 aluminum alloys in-situ annealing HOMOGENIZATION foil stock materials
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Controlling limiting length of tunnels on Al foil electroetched in HCl-H_2SO_4 solution 被引量:6
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作者 班朝磊 何业东 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第3期601-605,共5页
The limiting length of tunnels, llim, of Al foil electro-etched in HCl-H2SO4 solution and the corresponding anodic polarization curves in the same solution were measured. It is found that there is a dependence of llim... The limiting length of tunnels, llim, of Al foil electro-etched in HCl-H2SO4 solution and the corresponding anodic polarization curves in the same solution were measured. It is found that there is a dependence of llim on the potential difference, △φ, between the pitting potential, φpit, and the corrosion potential, φcorr, of Al foil, when the temperature and H2SO4 concentration of HCl-H2SO4 electrolyte are changed. The dynamic equation on the tunnel growing and the linear equation between llim and △φ were deduced by analyzing the relationship among the over-potential on Al foil surface, the transport over-potential in tunnel solution and the over-potential at tunnel tip during the electro-etching. The results show that the growing velocity of tunnels decreases with their extending in length and the changing trend of llim can be judged by measuring △φ, which supplies a convenient access to explore new kinds of etchants. 展开更多
关键词 H2SO4溶液 延伸长度 HCL 隧道 铝箔 控制限 阳极极化曲线 硫酸电解液
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