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Method for anodizing aluminum alloy and power supply for anodizing aluminum alloy

USPTO Application #: 20080087551
Title: Method for anodizing aluminum alloy and power supply for anodizing aluminum alloy
Abstract: In a method for anodizing an aluminum alloy to form an anodic oxide film on a surface of the aluminum alloy using pulsed electric power, a short circuit is formed, after application of a positive pulse voltage, between an anode for anodic oxidation and a cathode for anodic oxidation for a short-circuit duration of not longer than 15 μs during non application of the pulse voltage. The pulsed electric power has a waveform having a cycle composed, in the order, of a pulse voltage application duration (T+), a dead time (Td) and a short-circuit duration (Ts). Then, no or almost no negative current is allowed to flow, and the film formation rate can be increased to improve productivity. (end of abstract)
Agent: Wenderoth, Lind & Ponack, L.L.P. - Washington, DC, US
Inventors: Hiromichi Odajima, Kazuo Hayashi, Yuji Koyama
USPTO Applicaton #: 20080087551 - Class: 205324000 (USPTO)
Related Patent Categories: Electrolysis: Processes, Compositions Used Therein, And Methods Of Preparing The Compositions, Electrolytic Coating (process, Composition And Method Of Preparing Composition), Forming Nonmetal Coating, Predominantly Aluminum Substrate, Anodizing

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Cod abatement process for electrochemical oxidation
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Electrolysis: processes, compositions used therein, and methods of preparing the compositions

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