表面技术
錶麵技術
표면기술
Surface Technology
2015年
9期
56-60,77
,共6页
韩志高%许令峰%吴卫东%宋月鹏%郭晶
韓誌高%許令峰%吳衛東%宋月鵬%郭晶
한지고%허령봉%오위동%송월붕%곽정
预处理%电子铝箔%比电容%腐蚀%电化学%扩面
預處理%電子鋁箔%比電容%腐蝕%電化學%擴麵
예처리%전자려박%비전용%부식%전화학%확면
pretreatment%electron aluminum foil%specific capacitance%etching%electrochemical%area-enlarging
目的：研究高压电子铝箔在NaOH和HCl溶液中的电化学行为,分析酸、碱预处理对铝箔电化学腐蚀扩面效果的影响。方法比较铝箔在不同浓度NaOH,HCl溶液中的预处理效果。采用极化曲线获得铝箔在各预处理溶液中的电化学参数,研究其腐蚀行为。利用扫描电子显微镜观察预处理后铝箔的表面形貌,分析预处理对铝箔表面形貌的影响。观察铝箔腐蚀扩面后的蚀孔形貌及蚀孔分布,分析预处理对蚀孔的影响。结果预处理减弱了铝箔制造过程中形成的表面不均匀,提高了表面活性,使得铝箔在电化学腐蚀处理中蚀孔密度增加,分布均匀。对未预处理铝箔及经HCl和NaOH预处理的铝箔进行电化学扩面处理,发现相对于未预处理的铝箔(比电容为0.56μF/cm2),经HCl溶液预处理的铝箔比电容提高了4%~8%, NaOH溶液预处理的铝箔比电容提高更为明显,约为13%~16%。铝箔在HCl溶液中的自腐蚀电位约为-820 mV,在NaOH 溶液中的自腐蚀电位约为-1720 mV,并且经计算得知,铝箔在NaOH溶液中比在HCl溶液中自腐蚀速率快。结论铝箔在NaOH溶液中腐蚀均匀,用NaOH溶液对铝箔进行预处理,可以消除铝箔轧制缺陷,提高铝箔的比电容。
目的：研究高壓電子鋁箔在NaOH和HCl溶液中的電化學行為,分析痠、堿預處理對鋁箔電化學腐蝕擴麵效果的影響。方法比較鋁箔在不同濃度NaOH,HCl溶液中的預處理效果。採用極化麯線穫得鋁箔在各預處理溶液中的電化學參數,研究其腐蝕行為。利用掃描電子顯微鏡觀察預處理後鋁箔的錶麵形貌,分析預處理對鋁箔錶麵形貌的影響。觀察鋁箔腐蝕擴麵後的蝕孔形貌及蝕孔分佈,分析預處理對蝕孔的影響。結果預處理減弱瞭鋁箔製造過程中形成的錶麵不均勻,提高瞭錶麵活性,使得鋁箔在電化學腐蝕處理中蝕孔密度增加,分佈均勻。對未預處理鋁箔及經HCl和NaOH預處理的鋁箔進行電化學擴麵處理,髮現相對于未預處理的鋁箔(比電容為0.56μF/cm2),經HCl溶液預處理的鋁箔比電容提高瞭4%~8%, NaOH溶液預處理的鋁箔比電容提高更為明顯,約為13%~16%。鋁箔在HCl溶液中的自腐蝕電位約為-820 mV,在NaOH 溶液中的自腐蝕電位約為-1720 mV,併且經計算得知,鋁箔在NaOH溶液中比在HCl溶液中自腐蝕速率快。結論鋁箔在NaOH溶液中腐蝕均勻,用NaOH溶液對鋁箔進行預處理,可以消除鋁箔軋製缺陷,提高鋁箔的比電容。
목적：연구고압전자려박재NaOH화HCl용액중적전화학행위,분석산、감예처리대려박전화학부식확면효과적영향。방법비교려박재불동농도NaOH,HCl용액중적예처리효과。채용겁화곡선획득려박재각예처리용액중적전화학삼수,연구기부식행위。이용소묘전자현미경관찰예처리후려박적표면형모,분석예처리대려박표면형모적영향。관찰려박부식확면후적식공형모급식공분포,분석예처리대식공적영향。결과예처리감약료려박제조과정중형성적표면불균균,제고료표면활성,사득려박재전화학부식처리중식공밀도증가,분포균균。대미예처리려박급경HCl화NaOH예처리적려박진행전화학확면처리,발현상대우미예처리적려박(비전용위0.56μF/cm2),경HCl용액예처리적려박비전용제고료4%~8%, NaOH용액예처리적려박비전용제고경위명현,약위13%~16%。려박재HCl용액중적자부식전위약위-820 mV,재NaOH 용액중적자부식전위약위-1720 mV,병차경계산득지,려박재NaOH용액중비재HCl용액중자부식속솔쾌。결론려박재NaOH용액중부식균균,용NaOH용액대려박진행예처리,가이소제려박알제결함,제고려박적비전용。
Objective To investigate the electrochemical behavior of high-voltage electron aluminum foil in HCl and NaOH solu-tion, and the effect of alkaline or acidic pretreatment on the area-enlarging of electrochemical etching of the aluminum foil. Methods This study compared the pretreatment effect of aluminum foil in different concentrations of HCl and NaOH solution. The electrochemical parameters of aluminum foil in different pretreatment solutions were obtained with polarization curves by which the etching behavior of aluminum foil was analyzed. The morphology observation of aluminum foil surface by means of scanning electron microscope ( SEM) was used to analyze the influence of pretreatment on the surface morphology. The morphology and distribution of the pitting etching hole were observed to analyze the effect of pretreatment on the pitting. Results The pretreatment reduced the microstructure inhomogeneity on the foil surface formed during the manufacturing process and improved the surface activity, which increased the pit density and uniformity of pit distribution. The special capacitance of all experimental aluminum foils after electro etching process showed that compared with the primary aluminum foil (the specific capacitance was 0. 56 μF/cm2), the specific capacitance of foil with HCl solution pretreatment increased by 4% ~8%;whereas the specific capacitance of foil with NaOH solu-tion pretreatment increased by about 13% ~16%. The self-corrosion potential of aluminum foil in HCl solution was about -820 mV, while the self-corrosion potential in NaOH solution was obviously lower, about -1720 mV. Compared with that in HCl solu-tion, the self-corrosion rate of aluminum foil in NaOH solution was faster. Conclusion The more uniform corrosion in NaOH solu-tion could eliminate the rolling defects of aluminum foil and improve the specific capacitance of aluminum foil.
