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    Method and apparatus for electrochemical delacquering and detinning
    12.
    发明授权
    Method and apparatus for electrochemical delacquering and detinning 失效
    电化学脱色和鉴定的方法和装置

    公开(公告)号：US6045686A

    公开(公告)日：2000-04-04

    申请号：US991029

    申请日：1997-12-15

    申请人： James M. Fenton ,  John E. Dresty, Jr. ,  Richard Bodensteiner ,  Chunzhi He ,  Ramakrishnan Venkataraman ,  Jung-Chou Lin ,  Antonio J. Aldykiewicz, Jr.

    发明人： James M. Fenton ,  John E. Dresty, Jr. ,  Richard Bodensteiner ,  Chunzhi He ,  Ramakrishnan Venkataraman ,  Jung-Chou Lin ,  Antonio J. Aldykiewicz, Jr.

    IPC分类号： C25F5/00 ,  C25F1/04 ,  C25F1/06

    CPC分类号： C25F5/00

    摘要： A process for the delacquering and detinning of a metal substrate is presented comprising the fully electrochemical removal of both an outer polymeric coating and an inner tin coating from a metal substrate. The disclosed method provides a clean metal substrate, and results in wastes which are easily disposed of with minimal cost and minimal environmental impact. In one embodiment, the present invention comprises a one-stage process for removing an outer polymeric coating and an inner tin coating from a metal substrate in a single electrolyte bath through electrolytic removal of both the polymeric and tin layers from the metal substrate. An electrically conductive container having the electrolyte bath therein acts as an anode in the process, and the removed tin is plated out on the cathode. In another embodiment, the present invention comprises a two-stage process for removing an outer polymeric coating and an inner tin coating from a metal substrate. The first stage comprises removal of the polymeric coating in a first electrolyte bath through application of a cathodic current to a first electrically conductive container, e.g. tank, drum, or the like. The polymeric and tin coated metal substrate that is immersed in the first electrolyte bath is cathodically protected provided the coated metal substrate is in contact with the first electrically conductive container. The second stage comprises removal of the tin coating via application of moderate anodic currents to a second electrically conductive container, e.g. tank, drum, or the like. Such current results in the selective removal of tin from the substrate metal. The second electrically conductive container and the tin cans act as an anode in the process, and the removed tin is plated out on the cathode.

    摘要翻译： 提出了用于金属基材的脱胶和鉴定的方法，其包括从金属基材完全电化学去除外聚合物涂层和内锡涂层。 所公开的方法提供清洁的金属基底，并且导致易于处理的废物，其成本最低并且对环境的影响最小。 在一个实施方案中，本发明包括通过从金属基底电解去除聚合物层和锡层从单一电解质浴中从金属基底去除外部聚合物涂层和内部锡涂层的一步法。 其中具有电解质浴的导电容器在该过程中用作阳极，并且将去除的锡电镀在阴极上。 在另一个实施方案中，本发明包括用于从金属基底去除外聚合物涂层和内锡涂层的两阶段方法。 第一阶段包括通过将阴极电流施加到第一导电容器，例如在第一电解液槽中去除聚合物涂层。 罐，鼓等。 浸渍在第一电解液槽中的聚合物和锡涂覆的金属基底是阴极保护的，只要涂覆的金属基底与第一导电容器接触即可。 第二阶段包括通过将适度的阳极电流施加到第二导电容器上，例如去除锡涂层。 罐，鼓等。 这种电流导致锡从衬底金属中的选择性去除。 第二导电容器和锡罐在该过程中用作阳极，并且将去除的锡电镀在阴极上。