aluminum boats and saltwater. got a few questions

There are various grades of aluminum - some more resistant to corrosion than others. I'm not familiar with which grades are which but I know they are different. The biggest problem with saltwater use with an aluminum boat is failure to wash it well top and bottom after use. If you do that, then even the lesser grades of aluminum will last much longer.

My gigging boat (1648 Landau) is all weld aluminum and has been in nothing but saltwater for 14 years with absolutely no corrosion. Other than the dents and scrapes I've made running into stuff it's as good as the day I bought it. All I do is spray it down after each use.

Is it a flat bottom or mod v? Mine was a mod v.

Check out rookie boats on hwy 603 in waveland ms, not sure what your budget is but the custom make aluminum boats, may be an option and you can get just what you want!

Just my opinion/experience, but I stay away from the riveted. After a few years of walking around on them and going through choppy water, the rivets loosen and start to leak. Even if you avoid choppy water, the weight of an adult will create slack in the rivets over time. If you put some type of plywood floor over it, that would probably help.

As mentioned above, there are different grades of aluminum and you want to be sure whatever boat you buy is constructed of a 5000 series alloy such as 5086. The 5000 series alloys are the standard in the marine industry due to it's improved corrosion resistance versus other aluminum alloys such as a 6061.

From my experience with riveted aluminum boats is they leak. Also as mentioned above, from walking on the bottom over time the rivets loosen and leak. So I'm saying welded aluminum is the way to go. Also, with aluminum boats and salt water you really don't want any exposed seams for the salt water to sit up in. Over time the salt water will eat away at these seams more quickly so a seam-free welded boat, in my opinion, should hold up longer.