Venugopal, A. ; Panda, Rajiv ; Manwatkar, Sushant ; Sreekumar, K. ; Rama Krishna, L. ; Sundararajan, G. (2012) Effect of micro arc oxidation treatment on localized corrosion behaviour of AA7075 aluminum alloy in 3.5% NaCl solution Transactions of Nonferrous Metals Society of China, 22 (3). pp. 700-710. ISSN 1003-6326
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S1003-6326(11)61234-X
Abstract
Alumina coating was formed on AA7075 aluminum alloy by micro arc oxidation (MAO) method and its corrosion and stress corrosion cracking (SCC) behaviors were examined in 3.5% (mass fraction) NaCl solution. Electrochemical impedance spectroscopy (EIS) was used to evaluate the degradation of the coating as a function of immersion time and was modeled with appropriate equivalent circuits. Constant load stress corrosion cracking (SCC) results followed by post-test metallographic observations demonstrated the usefulness of MAO coating to avoid the premature failure of the alloy due to severe localized corrosion initiated by Cu- and Fe-rich intermetallic phases.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Aluminum Alloy; Micro Arc Oxidation; Impedance Spectroscopy; Stress Corrosion |
| ID Code: | 93530 |
| Deposited On: | 20 Jun 2012 03:57 |
| Last Modified: | 20 Jun 2012 03:57 |
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