METHOD FOR ANODIZING ALUMINUM MEMBER

METHOD FOR ANODIZING ALUMINUM MEMBER

PROBLEM TO BE SOLVED: To provide a method for anodizing an aluminum member in which a formation rate of an anodized film is accelerated so that an anodization step can be carried out on-line and synchronized with other steps. SOLUTION: The method for anodizing the aluminum member includes the steps...

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Hauptverfasser: KOJIMA TOSHIYA, IO KENJI
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Sprache:eng
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APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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creator KOJIMA TOSHIYA
IO KENJI
description PROBLEM TO BE SOLVED: To provide a method for anodizing an aluminum member in which a formation rate of an anodized film is accelerated so that an anodization step can be carried out on-line and synchronized with other steps. SOLUTION: The method for anodizing the aluminum member includes the steps of: immersing the aluminum member being the object to be treated in a treatment bath; sending a DC current to the treatment bath at an early stage until the bath voltage reaches a predetermined value (I); and sending a DC current with a superimposed AC current, in which a high-frequency current is superimposed on the DC current, to the treatment bath after the bath voltage reaches the predetermined value (II). The current density of the DC current is 50-120 A/dm2and the frequency of the high-frequency current is 5,000-15,000 Hz. COPYRIGHT: (C)2010,JPO&INPIT
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SOLUTION: The method for anodizing the aluminum member includes the steps of: immersing the aluminum member being the object to be treated in a treatment bath; sending a DC current to the treatment bath at an early stage until the bath voltage reaches a predetermined value (I); and sending a DC current with a superimposed AC current, in which a high-frequency current is superimposed on the DC current, to the treatment bath after the bath voltage reaches the predetermined value (II). The current density of the DC current is 50-120 A/dm2and the frequency of the high-frequency current is 5,000-15,000 Hz. 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subjects APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
title METHOD FOR ANODIZING ALUMINUM MEMBER
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