1.
    发明专利
    未知

    公开(公告)号:BR0302051A

    公开(公告)日:2004-09-08

    申请号:BR0302051

    申请日:2003-06-23

    Inventor: BHATIA PROMILA

    Abstract: An acidic aqueous solution containing a water soluble trivalent chromium compound is provided with an additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).

    6.
    发明专利
    未知

    公开(公告)号:DE60322792D1

    公开(公告)日:2008-09-25

    申请号:DE60322792

    申请日:2003-06-27

    Inventor: BHATIA PROMILA

    Abstract: An acidic aqueous solution containing a water soluble trivalent chromium compound is provided with an additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).

    7.
    发明专利
    未知

    公开(公告)号:DE60321435D1

    公开(公告)日:2008-07-17

    申请号:DE60321435

    申请日:2003-09-23

    Abstract: The present invention relates to a zinc-diffused nickel alloy coating for corrosion and heat protection and to a method for forming such a coating. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer (14) on a substrate (12), applying a layer of zinc (18) over the nickel or nickel alloy coating layer, and thermally diffusing the zinc into the nickel alloy coating layer. The coating method may further comprise immersing the coated substrate in a phosphated trivalent chromium conversion solution either before or after the diffusing step. The substrate may be a component used in a gas turbine engine, which component is formed from a steel material.

    8.
    发明专利
    未知

    公开(公告)号:AT404709T

    公开(公告)日:2008-08-15

    申请号:AT03254085

    申请日:2003-06-27

    Inventor: BHATIA PROMILA

    Abstract: An acidic aqueous solution containing a water soluble trivalent chromium compound is provided with an additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).

    9.
    发明专利
    未知

    公开(公告)号:AT397683T

    公开(公告)日:2008-06-15

    申请号:AT03255981

    申请日:2003-09-23

    Abstract: The present invention relates to a zinc-diffused nickel alloy coating for corrosion and heat protection and to a method for forming such a coating. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer (14) on a substrate (12), applying a layer of zinc (18) over the nickel or nickel alloy coating layer, and thermally diffusing the zinc into the nickel alloy coating layer. The coating method may further comprise immersing the coated substrate in a phosphated trivalent chromium conversion solution either before or after the diffusing step. The substrate may be a component used in a gas turbine engine, which component is formed from a steel material.

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