Power supply for anodizing, anodizing method, and anodized film
A technology of anodic oxidation and anodic oxidation layer, which is applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., and can solve problems such as reduced bonding rate, deterioration of mechanical properties, and difficulty in growing an oxide layer
Inactive Publication Date: 2012-05-02
KOST CORP
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Problems solved by technology
[0004] However, according to the conventional anodizing method, due to the reaction between the metal and the electrolyte, as the oxide layer is formed, the metal is simultaneously dissolved, so that as the thickness of the oxide layer increases, the density of the oxide layer decreases and the mechanical properties deteriorate
Therefore, it is difficult to grow an oxide layer beyond a certain thickness
In addition, if a specific oxide layer sticks between the oxidized layer produced by the anodizing process and the metal as the base material before the anodizing process, the bonding ratio between the base material and the oxidized layer decreases, so that The oxide layer is easily detached from the substrate
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[0053] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In this specification, already known structures or functions are not described for the purpose of clarifying the present invention. Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention, rather than to show only one embodiment that can be implemented according to the present invention. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without such specific details. For example, the following description is given f...
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Abstract
An anodizing method for growing an anodized layer on a surface of aluminum in electrolyte is disclosed. The method comprises applying a DC / AC-combined pulse wave between an anode and a cathode. The DC / AC-combined pulse wave is provided by combining a DC pulse wave with an AC wave, and has a peak voltage at a start point of each pulse. The grown anodized layer may be equal to or less than 300[mu]m in thickness, and the diameter of a cell in the anodized layer may range between 50nm and 100nm. The power supply used for anodizing may comprise a rectifying modulator unit, an AC modulating unit, a pulse wave synthesizing unit, and a control unit.
Description
technical field [0001] Embodiments relate to an anodic oxidation method for growing an oxide layer on the surface of a non-ferrous metal through an electrochemical process, thereby improving the corrosion resistance or wear resistance of the non-ferrous metal. Specifically, the present embodiment relates to a power source suitable for supplying an electrolytic cell for implementing an anodizing process having a pulse wave including a direct current (DC) component and an alternating current (AC) component. Furthermore, the present embodiment relates to an anodization method using the power source and an anodized layer grown by the anodization method. Background technique [0002] Nonferrous metals such as aluminum (Al), magnesium (Mg), and titanium (Ti) generally react with highly reactive moisture included in the air, thereby naturally forming a thin oxide layer thereon. However, this native oxide layer is too thin or has too sparse a structure to protect non-ferrous metals...
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IPC IPC(8): C25D11/04
CPCC25D11/024C25D11/02C25D11/005C25D11/04
Inventor 辛容奉
Owner KOST CORP