Anodising 2014A and 7075
Anodising 2014A and 7075
(OP)
Can anyone help clear up some confusion I have over the suitability of 2014 T6 and 7075 T6 for anodising.
I have heard that 7075 T6 can become brittle and therefore fatigue performance is reduced when anodised or hard anodised. Conversely when browsing anodisers web sites I have noticed that 7075 is the preferred material for anodising or hard anodising as 2014 and other alloys with high copper content are succeptible to burning. The standard procedure where I work now is to avoid anodising of 7075 where used in high fatigue situations.
Can anyone help resolve my confusion?
I have heard that 7075 T6 can become brittle and therefore fatigue performance is reduced when anodised or hard anodised. Conversely when browsing anodisers web sites I have noticed that 7075 is the preferred material for anodising or hard anodising as 2014 and other alloys with high copper content are succeptible to burning. The standard procedure where I work now is to avoid anodising of 7075 where used in high fatigue situations.
Can anyone help resolve my confusion?





RE: Anodising 2014A and 7075
RE: Anodising 2014A and 7075
The difference in anodizing performance among the various aluminum alloys has to do with the exact chemical composition, with copper-containing (2XXX series) alloys being noticeably worse, as AlanD explained.
RE: Anodising 2014A and 7075
I UNDERSTAND THAT 2XXX ALLOYS DO NOT ANODISE AS WELL AS 7075 BUT IS IT TRUE THEN THAT 7075 FATIGUE PERFORMANCE IS REDUCED MORE THAN SAY 2014 AFTER ANODISING, OR WOULD THE REDUCTION BE THE SAME??
RE: Anodising 2014A and 7075