Invention Grant
US07935385B2 Metal material having formed thereon chromium oxide passive film and method for producing the same, and parts contacting with fluid and system for supplying fluid and exhausting gas
失效
在其上形成有氧化铬钝化膜的金属材料及其制造方法，以及与流体接触的部件和用于供应流体和排出气体的系统
- Patent Title: Metal material having formed thereon chromium oxide passive film and method for producing the same, and parts contacting with fluid and system for supplying fluid and exhausting gas
- Patent Title (中): 在其上形成有氧化铬钝化膜的金属材料及其制造方法，以及与流体接触的部件和用于供应流体和排出气体的系统
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Application No.: US10646855Application Date: 2003-08-21
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Publication No.: US07935385B2Publication Date: 2011-05-03
- Inventor: Tadahiro Ohmi , Yasuyuki Shirai , Nobukazu Ikeda , Eiji Ideta , Akihiro Morimoto , Tetsutaro Ogushi , Takehisa Konishi
- Applicant: Tadahiro Ohmi , Yasuyuki Shirai , Nobukazu Ikeda , Eiji Ideta , Akihiro Morimoto , Tetsutaro Ogushi , Takehisa Konishi
- Applicant Address: JP Miyagi-Ken JP Osaka
- Assignee: Tadahiro Ohmi,Fujikin, Inc.
- Current Assignee: Tadahiro Ohmi,Fujikin, Inc.
- Current Assignee Address: JP Miyagi-Ken JP Osaka
- Agency: Young & Thompson
- Main IPC: B05D3/02
- IPC: B05D3/02 ; B05D3/04 ; C25D5/50
Abstract:
The object of the present invention is to form a chromium-oxide film excellent in corrosion resistance without containing an oxide film of other metal onto the optional metallic material. The chromium-oxide passivation film excellent in corrosion resistance without containing the oxide film of other metal can be formed inexpensively and in a short time, and a fluid supplying system for supplying fluid hard in corrosivity in safety is able to be provided. This invention comprises a step of forming the passivation film consisting of a chromium oxide by giving heat treatment in an oxidizing atmosphere after coating chromium on metallic material of which surface roughness (Ra) of a coat surface is not more than 1.5 μm
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