Aluminum tubs

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I had a couple quick question about aluminum tubs. You guys that have used them in your builds, have you had to do a lot of aluminum welding on them? Have you had to drill most of the bolt holes (ambulance doors, spare tire carrier, connecting hard top, etc..)? Any issues with that?

Just curious. There is an aluminum tub for sale on one of the outer islands. My 40 will need quite a bit of rust repair, and this would alleviate a lot of it. Plus in my coastal environment, it might be a smart choice long term.
The seller said it has been sitting outside the last 8-10 years. Said the red stains are from red dirt and other metal parts that have rusted and stained it over the years. Any suggestions or advice would be great!!
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It would depend on the asking price of that and what year it's for. I bought my tub last year and paid 4k on the dot straight from aqualu which included shipping. If u run into any obstacles or if that tub was dropped really hard and warped it(they are very tough though so doubtful but still a concern)then your in trouble. So if they are selling it for like 2k or so I would get it. Otherwise I would just buy a new one and u have support from aqualu then since u bought one new if a obstacle comes up.
Keep in mind that if you don't butcher the old tub too bad removing it u can sell it and recoup some money. All my communication with aqualu was by email so that everything was in writing and we were both clear as to the year I needed and what I wanted. I would not mount the stock tire carrier just because they tend to rattle. If u get a 4plus or 4x4 labs carrier they are much more robust. Before u drill anything you have to mock up the aqualu in bare aluminum with all body parts such as doors and all, get it all lined up, and then drill all the holes for door catches and hard top and bolting to the cowl. In my build thread below I have lots of pics of fitting that stuff and how I did it. I didn't like the aqualu transmission tunnel, so I used the stock steel transmission tunnel which then I had to modify it to work. While I had the tub off I had access to a lot of the frame, so I spent quite some time cleaning the frame up. To the time I had removed the old tub to having it back from the paint shop it was about 6 months ish hitting it hard on the weekends and some after work during the week. It accelerates a restoration a great deal in my opinion. Their is a fair amount of grunt work involved still though.
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OK I get it......makes sense to me.

It's not just steel on aluminum, and not just on a mechanical item with a battery and generator. Its an electrochemical process, and will occur even inside and out of the elements.

If you place two dissimilar metals that are favorable for the electrolsis in contact, they will cause each other to corrode. Or you'll get preferential corrosion, like the bolt rusting away and leaving the bolt hole mostly intact.

Just provide a barrier for the metals, and there's no problem.

EDIT: Not to insult anyones intelligence. But just in case anyone thought they could unplug the battery and garage your aluminum tub LC, and not have to worry about bimetallic corrosion.
 

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