Ultrasonic effect on etching tunnel morphology and distribution of aluminum foil

Bin Hu^a, Yanzi Sun^a, Bing Guan^a, Jing Zhao^a, Huaihao Zhang^*a, Deqiu Zhu^b, Kunsong Ma^b, Changjing Cheng

College of Chemistry and Chemical Engineering, Yangzhou University

Abstract:Etching aluminum foil was prepared by electrochemical DC etching under ultrasonic superimposition. Specifically, the relationship of electrochemical behavior, interface behavior and mass transfer enhancement from ultrasound was investigated intensively by chronopotentiometry, potentiodynamic polarization, cyclic voltammetry and electrochemical impedance spectra. Meanwhile, the etching specimens were characterized by SEM, N2 adsorption and XRD patterns measurements. The results showed that ultrasonic agitation inhibited the growth of aluminum oxide film and facilitated pit initiation effectively via increasing the Cl−adsorption on electrolyte/aluminum oxide film interface, and strengthened the inward/outward migration of Cl−and AlCl3 within tunnels by thinning the thickness of diffusion layer and decreasing the electrolyte resistance. Moreover, the double layer capacitanceCdl, pit density, average pit size/tunnel length and its homogeneity are all enhanced under ultrasonic superimposition.

Applied Surface Science, 2017, 392, 375-383.

文章链接:http://dx.doi.org/10.1016/j.apsusc.2016.09.074

文章附件(杂志名称简写-年份-卷-起始页码):APPL SURF SCI, 2017, 392, 375