公开(公告)号：US11542576B2

公开(公告)日：2023-01-03

申请号：US15780304

申请日：2016-11-30

申请人： NORSK HYDRO ASA

发明人： Øystein Bauger ,  Oddvin Reiso ,  Hans Bjerkaas ,  Tom Hauge ,  Snorre Kjørstad Fjeldbo

IPC分类号： C22C21/02 ,  C25D11/04 ,  C22F1/043 ,  C23F1/36 ,  B21C23/00 ,  C22C21/08 ,  C22F1/05 ,  C22F1/04 ,  C22F1/047 ,  C25D11/16

摘要： Aluminium alloys suitable for etched and anodized components, in particular aluminum extrusion alloys of the types containing Magnesium and Silicon, which after being extruded to any wide variety of forms for different applications such as house buildings and other building applications is subjected to etching in a conventional alkaline etching bath and subsequent anodizing, wherein the relation between Cu and Zn is controlled to avoid preferential grain etching and the ratio of Cu/Zn is below 1.