发明名称 |
Aluminum products having improved corrosion resistance. |
摘要 |
A corrosion resistant aluminum article is described. It includes a main body portion formed of an aluminum alloy containing no more than 0.4% iron, no more than 0.15% silicon, from about 0.1% to about 0.6% copper and from about 0.7% to about 1.5% manganese. The corrosion resistance is provided by a silicon-rich band of dense precipitate formed in the alloy adjacent at least one face thereof. This band has a thickness of about 20-50 mu m and there is substantially less manganese in solid solution in the band than in the alloy outside the band. To form the band, a silicon-containing layer is applied to a surface of the alloy body to be protected and the composite thus formed is heat treated at a temperature of at least 550 DEG C. |
申请公布号 |
EP0327245(B1) |
申请公布日期 |
1995.06.21 |
申请号 |
EP19890300669 |
申请日期 |
1989.01.25 |
申请人 |
ALCAN INTERNATIONAL LIMITED |
发明人 |
FORTIN, PAUL EMILE;MAROIS, PIERRE HENRI;EVANS, DEWI GORDON SUTCLIFFE |
分类号 |
C23C10/28;B23K35/28;B32B15/01;C22C21/00;C22F1/04;C23C26/00;(IPC1-7):B32B15/01 |
主分类号 |
C23C10/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|