发明授权
- 专利标题: Method for the preparation of decorative coating on metals
- 专利标题(中): 金属装饰涂层的制备方法
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申请号: US151363申请日: 1988-02-02
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公开(公告)号: US4869789A公开(公告)日: 1989-09-26
- 发明人: Peter Kurze , Waldemar Krysmann , Maria Berger , Klaus Rabending , Joachim Schreckenbach , Thomas Schwarz , Karl-Heinz Hartmann
- 申请人: Peter Kurze , Waldemar Krysmann , Maria Berger , Klaus Rabending , Joachim Schreckenbach , Thomas Schwarz , Karl-Heinz Hartmann
- 申请人地址: DDX Karl-Marx-Stadt
- 专利权人: Technische Universitaet Karl-Marx-Stadt
- 当前专利权人: Technische Universitaet Karl-Marx-Stadt
- 当前专利权人地址: DDX Karl-Marx-Stadt
- 优先权: DDX299618 19870202; DDX229620 19870202
- 主分类号: C25D11/02
- IPC分类号: C25D11/02
摘要:
The process for producing decorative coatings on metals is primarily used in the jewelry industry, in handicrafts, and in device construction according to the invention, matte, true-to-form decorative coatings with a homogenous thickness of 3 .mu.m to 30 .mu.m are provided means of an electrochemical and plasmachemical reaction using a pulse operation in aqueous electrolytes at voltage peaks of 250 V to 750 V, pulse times of 20 .mu.s to 2 ms, pulse frequencies of 35 Hz to 300 Hz, pulse currents from 20 A to 120 A, electrolyte temperatures between 318 K and 360 K, and average current densities from 0.1 A cm.sup.-2 to 1 A cm.sup.-2.
公开/授权文献
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