Method for heating aluminum baths,申请号US19820410520-传众专利搜索

Method for heating aluminum baths

申请公布号：US4382844(A)

申请号：US19820410520

申请日期：1982.08.23

申请公布日期：1983.05.10

申请人：

SIEMENS AKTIENGESELLSCHAFT

发明人：BIRKLE, SIEGFRIED;STOEGER, KLAUS

分类号：C25D21/02;(IPC1-7):C25D17/06;C25D17/18

主分类号：C25D21/02

摘要：Aluminum electroplating installations containing aprotic electrolyte bath systems typically require an electrolyte operating temperature of over 80 DEG C. in order to achieve useable aluminum precipitations. The warming-up and heating of such aluminum electrolyte baths has heretofore been accomplished with indirect heating methods, such as surrounding the baths with a heating jacket or by conducting electrolyte out of the bath through a heat exchanger and then returning the heated electrolyte. The present invention concerns a more efficient heating method whereby Joule's heat is used to heat an aprotic electrolyte bath. Accordingly, at least two electrodes are immersed into the electrolyte and charged with alternating pulses by a square wave pulse generator such that a heating current flows through the electrolyte. The anodes and cathodes of the aluminization electrolyte bath are preferably used as the heating electrodes.