Electrochemical Properties of Anodized and Sealed Aluminum Films

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The electrochemical behaviors of anodized and sealed aluminum alloys in NaCl solution were studied by potentiodynamic polarization, the open-circuit-potential and EIS. The results show that anodic oxidization of aluminum increases its corrosion resistance greatly. Different sealing methods have different influences on corrosion behavior of the anodized alloys in NaCl solution; corrosion resistance increases in the order: no sealing < water sealing < dichromate sealing < nickel fluoride sealing. The modulus of the porous film sealed by dichromate solution increases with the immersion time in NaCl solution, which is similar to the self-sealing effect of unsealed anodic films.

Info:

Periodical:

Advanced Materials Research (Volumes 11-12)

Main Theme:

Edited by:

Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang

Pages:

433-436

DOI:

10.4028/www.scientific.net/AMR.11-12.433

Citation:

X. H. Zhao et al., "Electrochemical Properties of Anodized and Sealed Aluminum Films", Advanced Materials Research, Vols. 11-12, pp. 433-436, 2006

Online since:

February 2006

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Price:

$35.00

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[9] J.A. Gonzalez, V. Lopez, A. Bautista and E. Otero: J. Appl. Electrochem. Vol. 29 (1999), p.229. Fig. 5. Bode plots of the anodic films sealed in potassium dichromate solution.

[10] -2.

[10] -1.

[10] [0] [10] [1] [10] [2] [10] [3] [10] [4] [10] [5] [10] [1] [10] [2] [10] [3] [10] [4] [10] [5] [10] [6] [10] [7] [10] [8] a sealed in K2Cr2O7 Z module / Ω. cm.

DOI: 10.3897/zookeys.675.12453.figure3

[2] Frequency / Hz.

[1] day.

[13] days.

[60] days 110 days 150 days 10-2 10-1 100 101 102 103.

[10] [4] [10] [5] [0] [20] [40] [60] [80] 100 sealed in K2Cr2O7 Frequency / Hz.

[1] day.

[13] days.

[60] days 110 days 150 days b Phase angle / degree.

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