Title:
MAGNESIUM ALLOY MEMBER
Document Type and Number:
WIPO Patent Application WO/2011/071023
Kind Code:
A1
Abstract:
Disclosed is a magnesium alloy member having excellent corrosion resistance. The magnesium alloy member comprises: a base material which comprises a magnesium alloy containing more than 7.5 mass% of Al; and a corrosion-resistant layer which is formed on the surface of the base material by a chemical conversion treatment. The base material has, dispersed therein, precipitates, typically particles each of which comprises an intermetallic compound containing at least one of Al and Mg and which have an average particle diameter of 0.05 to 1 μm inclusive. The total surface area of the particles is 1 to 20% by area inclusive. The corrosion-resistant layer comprises a lower layer and a surface layer in this order from the base material side, wherein the surface layer is denser than the lower layer. In the magnesium alloy member, the base material itself has high corrosion resistance because the Al content in the base material is high. Further, because the corrosion-resistant layer has a dense layer provided on the surface side thereof, a corrosive solution hardly penetrates into the base material. Therefore, the magnesium alloy member has high corrosion resistance. When a porous material is used for the lower layer, the detachment of the corrosion-resistant layer rarely occurs even when the magnesium alloy member is subjected to impact or the like, and therefore high corrosion resistance can be kept readily.
Inventors:
MIZUNO, Osamu (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
水野 修 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
OKUDA, Nobuyuki (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
奥田 伸之 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
MORI, Koji (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
森 宏治 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
水野 修 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
OKUDA, Nobuyuki (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
奥田 伸之 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
MORI, Koji (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
森 宏治 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
Application Number:
JP2010/071848
Publication Date:
June 16, 2011
Filing Date:
December 06, 2010
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
MIZUNO, Osamu (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
水野 修 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
OKUDA, Nobuyuki (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
奥田 伸之 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
MORI, Koji (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
MIZUNO, Osamu (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
水野 修 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
OKUDA, Nobuyuki (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
奥田 伸之 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
MORI, Koji (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
International Classes:
C22C23/02; B21B3/00; B22D11/00; C22F1/06; C23C22/22; C22F1/00
Attorney, Agent or Firm:
YAMANO, Hiroshi (KEIMEI PATENT OFFICE, 10F ASTRO Shin Osaka 2 Bldg., 1-3, Nishinakajima 6-chome, Yodogawa-ku, Osaka-sh, Osaka 11, 〒5320011, JP)