公开(公告)号：US3832293A

公开(公告)日：1974-08-27

申请号：US33714973

申请日：1973-03-01

申请人： D & M TECHNOLOGIES

发明人： HRADCOVSKY R ,  BAYLES S

IPC分类号： C25D9/04 ,  H01G9/00 ,  C23B9/02 ,  C23B11/02

CPC分类号： H01G9/0032 ,  C25D5/00 ,  C25D9/04 ,  C25D9/12

摘要： METALS AND ALLOYS WHICH HAVE THE PROPERTY OF ELECTOLYTIC RECTIFICATION ARE COATED BY IMMERSION IN AN AQUEOUS BATH COMPRISING AN ALKALI METAL HYDROXIDE, AN ALKALI METAL SILICATE AND A CATALYST AND APPLICATION OF A SUFFICIENTLY HIGH VOLTAGE TO OBTSIN SPARK DISCHARGE AT THE SURFACE TO BE COATED THEREBY TO PROVIDE A DURABLE COATING ON THE SURFACE.