摘要
应用正交实验方差分析研究了高压铝电解电容器用铝箔电解扩面腐蚀时,发孔腐蚀液中H2SO4浓度、HCl浓度、温度、电解电流密度和电解腐蚀时间对铝箔腐蚀扩面效果的影响;采用扫描电镜观测和极化曲线测试研究了发孔腐蚀液中H2SO4浓度变化对腐蚀铝箔表面形貌、横截面形貌以及电蚀发孔点蚀能力的影响。结果表明:腐蚀液中H2SO4浓度是最重要的影响因素,随着H2SO4浓度的增加,极化曲线上点蚀电流密度减小、发孔密度降低、隧道孔长度减小、并孔程度减轻,在本研究范围内,较佳的腐蚀工艺条件为:盐酸浓度1.4 mol·L-1、硫酸浓度3.2 mol·L-1、温度73℃、电流密度0.30 A·cm-2、时间50 s。
With orthogonal design and variance analysis,the effect of H2SO4 and HCl concentration,temperature,electro-etching current density and etching time on surface area enlargement of Al foil for high voltage aluminum electrolytic capacitor was studied. SEM and polarization curve measurement were used to observe and analyze the influence of H2SO4 concentration on surface, cross-section morphology and pitting current of the etched Al foil. The results show that the H2SO4 concentration is the most critical factor for the etching process. With the increase of H2SO4 concentration,the pitting current in the polarization curve,pit density,tunnel length and pits merging are reduced. The optimum parameters for DC etching Al foil are 1. 4 mol·L- 1HCl,3. 2 mol·L- 1H2SO4,73 ℃,DC etching current of 0. 30 A·cm- 2and etching time of 50 s.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第2期219-223,共5页
Transactions of Materials and Heat Treatment
基金
山东省高校智能信息处理与网络安全重点实验室(聊城大学)
关键词
正交实验
方差分析
铝电解电容器
电解腐蚀
orthogonal experiment
variance analysis
aluminum electrolytic capacitor
electro-etching
