1.
    发明专利
    未知

    公开(公告)号:DE3729921A1

    公开(公告)日:1988-04-28

    申请号:DE3729921

    申请日:1987-09-07

    Applicant: MACDERMID INC

    Abstract: In a mechanical plating process, oxidation-prone metals, such as aluminum, titanium, magnesium, and mixtures thereof, can be applied to metal substrates without the corrosion problems encountered in the prior art. To avoid such problems, the substrate is plated with the oxidation-prone metal and relatively minor amounts of an immersion metal and, optionally, a protective metal. The immersion metal which can be salts or oxides of metals selected from the group consisting of tin, copper, nickel, cadmium, zinc, lead, and mixtures thereof coats the oxidation-prone metal in forming a mechanical plating coating and prevents formation of an oxide layer on the oxidation-prone metal. The protective metal which may be selected from the group consisting of zinc, cadmium, and mixtures thereof prevents oxidation of the plated metal substrate when exposed to the environment. An etching agent is used either prior to and/or during mechanical plating.

    6.
    发明专利
    未知

    公开(公告)号:DE68926622D1

    公开(公告)日:1996-07-11

    申请号:DE68926622

    申请日:1989-11-20

    Applicant: MACDERMID INC

    Abstract: A composition for stripping tin, lead or solder, as well as any underlying copper-tin alloy, from copper surfaces, containing an alkane sulfonic acid, preferably methane sulfonic acid, an inorganic nitrate, preferably ferric nitrate, and an inhibitor component. The composition effects rapid stripping without any appreciable formation of sludge or precipitate or suspended particles, and without any substantial attack on the underlying copper surface.

    10.
    发明专利
    未知

    公开(公告)号:DE68926622T2

    公开(公告)日:1996-11-28

    申请号:DE68926622

    申请日:1989-11-20

    Applicant: MACDERMID INC

    Abstract: A composition for stripping tin, lead or solder, as well as any underlying copper-tin alloy, from copper surfaces, containing an alkane sulfonic acid, preferably methane sulfonic acid, an inorganic nitrate, preferably ferric nitrate, and an inhibitor component. The composition effects rapid stripping without any appreciable formation of sludge or precipitate or suspended particles, and without any substantial attack on the underlying copper surface.

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