公开(公告)号：US20130129908A1

公开(公告)日：2013-05-23

申请号：US13709519

申请日：2012-12-10

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Sachiko HIROMOTO ,  Akiko YAMAMOTO ,  Norio MARUYAMA ,  Toshiji MUKAI ,  Hidetoshi SOMEKAWA

IPC: A61L27/00

CPC classification number: A61L27/00 ,  A61L27/047 ,  A61L27/32 ,  A61L27/58 ,  C23C22/22

Abstract: A magnesium-based medical device which can adjust a degree of corrosion within a wide range of period such that the device can maintain a sufficient strength only during a desired period and disappears within a desired period thereafter and a manufacturing method thereof are provided. A magnesium-based medical device of the present invention is a magnesium-based medical device in which a base material is made of magnesium or a magnesium alloy, wherein a corrosion-resistant film is formed on a surface of the base material, and variation in surface hardness of the formed corrosion-resistant film in the in-plane direction is less than 21 in terms of a dispersion value of Vickers hardness.