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Shaped metal article and method of producing shaped metal article having oxide coating

A technology for forming metal and covering layers, which is applied in the direction of metal layered products, chemical instruments and methods, metal material coating technology, etc., can solve the problems that the appearance and color of the covering layer cannot be freely controlled, and the conductivity cannot be fully controlled.

Inactive Publication Date: 2005-05-18
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the Cr-free oxidized covering layer disclosed in Japanese Patent No. 11-29874, there is a problem that the electrical conductivity cannot be sufficiently controlled, and the appearance color of the obtained covering layer cannot be freely controlled.

Method used

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  • Shaped metal article and method of producing shaped metal article having oxide coating
  • Shaped metal article and method of producing shaped metal article having oxide coating
  • Shaped metal article and method of producing shaped metal article having oxide coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The purpose of this example is to refer to Figures 4 to 6 , describing the surface treatment of the shaped metal product according to a preferred embodiment of the present invention, wherein Figure 4 Shown is a flow chart of the method of making the shaped metal article, Figure 5 Shown is a schematic cross-sectional view of a conversion treatment tank used in the surface treatment of shaped metal articles, Figure 6 Shown is a schematic cross-sectional view of a shaped metal article produced after surface treatment with an oxide coating attached.

[0096] First, a magnesium alloy prepared by adding Al and Cu to Mg is formed by die casting to obtain a Mg alloy shaped product 11 having a predetermined shell structure (see Figure 5 ).

[0097] Next, pretreatment B is carried out to the formed Mg alloy product 11 1 . In preprocessing B 1 In this process, the surface of the molded product 11 is roughened by sandblasting to obtain a surface roughness R of about 0.1-...

Embodiment 2

[0121] The purpose of this example is to refer to Figures 7 to 9 , illustrating the surface treatment of the shaped metal product according to another preferred embodiment of the present invention, wherein Figure 7 Shown is a flow chart of the method of making the shaped metal article, Figure 8 Shown is a schematic cross-sectional view of an anodizing tank for surface treatment of the shaped metal article, Figure 9 Shown is a schematic cross-sectional view of the resulting shaped metal article deposited with an oxide coating after anodizing.

[0122] The method described in Example 1 was repeated to produce a shaped Mg alloy article 11, which was then subjected to B 1 to B 6 preprocessing steps such as Figure 7 and Figure 8 shown. The surface of the shaped Mg alloy product 11 is thereby activated and cleaned.

[0123] Complete preprocessing step B 1 to B 6 Afterwards, non-chromium anodizing treatment C is carried out to the molded Mg alloy product 11 2 . For n...

Embodiment 3

[0142] The purpose of this example is to refer to Figures 10 to 11 , to describe the surface treatment of the shaped metal product according to another preferred embodiment of the present invention, wherein Figure 10 Shown is a flow diagram of a method of manufacturing a shaped metal article, Figure 11 Shown is a schematic cross-sectional view of a shaped metal article deposited with an oxide coating, the shaped metal article having a layer of epoxy resin coated thereon.

[0143] Repeating the method for manufacturing the shaped Mg alloy product 11 in Example 1 or Example 2, and then subjecting the shaped product 11 to a pretreatment step B, namely step B 1 to B 6 ,Such as Figure 10 shown. The surface of the shaped Mg alloy product 11 is thereby activated and cleaned.

[0144] Complete preprocessing step B 1 to B 6 Finally, carry out non-chromium (or claim chromium-free) surface treatment C to the molded Mg alloy product 11, namely conversion treatment C as describe...

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Abstract

The present invention discloses a shaped metal product with an oxide coating layer and a preparation method thereof. The shaped metal product has a metal body with an oxide coating layer applied on its surface. The metal body is composed of magnesium, aluminum and zinc. It is composed of a single metal selected from the group consisting of magnesium, aluminum and zinc, or is made of a metal alloy containing at least one metal selected from the group consisting of magnesium, aluminum and zinc as a main component, and the oxide coating layer is made of an aluminum salt as a main component. The oxide coating layer is formed by surface treatment or anodizing treatment of the metal body in a separate treatment solution.

Description

[0001] Cross References to Related Applications [0002] This application is based on Japanese Patent Application No. 2003-383441 with a filing date of November 13, 2003, and claims priority therefrom. technical field [0003] The present invention relates to shaped metal articles having a protective oxidic coating and to a method for their preparation, in other words to a method of treating the surface of a shaped metal article. More particularly, the present invention relates to a method of treating the surface of a shaped metal article, such as a shaped metal cover, cabinet or housing made of a lightweight alloy of metals such as magnesium and aluminum, which is used in various information processing devices such as Notebook personal computer, handwriting input personal computer, hand-held personal computer (PDA) and portable telephone, by the method for forming the protective oxide cover layer that does not contain chromium (Cr) with controllable conductivity and / or appear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/10B05D7/14B32B15/04B32B15/08B32B15/20C23C22/36C23C22/83C23C28/00C25D11/06C25D11/30C25D11/34
CPCB32B15/04B32B15/08B32B15/20C23C22/361C23C22/83C23C28/00C25D11/06C25D11/30C25D11/34B32B2307/714
Inventor 油井靖
Owner FUJITSU LTD
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