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中国腐蚀与防护学报  1999, Vol. 19 Issue (4): 200-206     
  研究报告 本期目录 | 过刊浏览 |
铝箔交流腐蚀的阴极半周期间表面酸度变化与腐蚀产物膜的形成
肖占文;杨邦朝
电子科技大学电子材料工程系
ACIDITY CHANGES AND FILM FORMATION ON ELECTRODE DURING THE NEGATIVE HALF CYCLES OF AC ETCHING OF ALUMINUM
Zhanwen Xiao;
电子科技大学电子材料工程系
全文: PDF(148 KB)  
摘要: 建立了一个估算在盐酸溶液中交流电解腐蚀铝箔时阴极半周铝表面液层酸度变化和预测腐蚀膜沉积的数学模型。分析结果表明:电极表面液层酸度仅取决于盐酸本体浓度(Co)、外加阴极电流密度(i appl)和交流电频率(f)如果腐蚀条件满足则Al3+就可能沉淀形成腐蚀产物膜。
关键词 铝箔交流腐蚀阴极半周酸度腐蚀产物膜    
Abstract:An important factor in ac etching of aluminum foil in hydrochloric acid solution is a alkalization of the electrolyte near the cathode and precipitation of Al3+ as etch film depositing on aluminum,which influence in lare extent the morphology of etched surface.The mass transport process of hydrogen evolution on aluminum during the negative half-cycle of ac etching of aluminum in HCl solutions has been analyzed. An equation was derived to estimate the surface hydrogen ion concentration as a function of the bulk HCl concentration,curent density and frequency of the applied alternating current on the basis of diffusion equation in which diffusion and electrical migration of H+ in the electrolyte,as well as the variztions of actual hydrogen reduction current density with the surface morphology of aluminum were considered.The analysis showd that the formation of etch film occurs if the actual ratio of concentration of hydrochloric acid to the applied cathodic current density is lower than or equal to the corresponding critical ratio calculated by the inequality, where Co is the bulk HCl concentration in mol?L, i appl is the average value of current density in A/cm2, and f is the frequency of alternating current in Hz.The results published in literature can be interpreted satisfactorily by using the approximate formula.Thus, the etch conditions under which etch film is to be expected could be predicted on the basis of the present results.
Key wordsaluminum foil    AC etching    cathodic half cycle    acidity    etch film
收稿日期: 1998-09-16     
通讯作者: 肖占文   
Corresponding author: Zhanwen Xiao   

引用本文:

肖占文; 杨邦朝 . 铝箔交流腐蚀的阴极半周期间表面酸度变化与腐蚀产物膜的形成[J]. 中国腐蚀与防护学报, 1999, 19(4): 200-206 .
Zhanwen Xiao. ACIDITY CHANGES AND FILM FORMATION ON ELECTRODE DURING THE NEGATIVE HALF CYCLES OF AC ETCHING OF ALUMINUM. J Chin Soc Corr Pro, 1999, 19(4): 200-206 .

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y1999/V19/I4/200

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