Ditto for 2024 which is much easier to find. The trouble with these 'higher' alloys of aluminum is that they corrode like mad; terrible fatal intergrannular corrosion with the slightest provocation. This is espeially true of 7075. That's why you don't see them used in marine extrusions very often. Anodizing would be absolutely mandatory; paint would just not cut it. I've seen 7075-T6 go from uncorroded bare clean metal to intergrannular (trashed) in a month by sitting outside in weather. And not on the beach, mind you but at an inland airport! We had to instruct our paint crew to carry a spray can of green primer to 'touch-up' any bare spots at the end of each work day in case the job got held up so as not to create a bunch of skin repairs! What a nightmare!

Also these alloys are not weldable, if that matters to you. 6061 happens to be the strongest weldable alloy. Also 6061 has a much better fatigue life than either 2024 or 7075. There's a reason the marine industry uses what they use. If you want stronger/lighter, go with carbon. Since 7075 is used almost exclusively by the aircraft industry, it costs about like a carbon pole anyway, unless you just happen to find the right size in a surplus store or scrap bin.


IMHO

Jimbo