lckstckn2smknbrls said:
There are many post on this subject do a search. IIRC The newest pressure treated wood claims to be less reactive to aluminum not that it is 100% safe.
Yep. There is a difference in "less reactive" and "not reactive" in my book. BIG difference.
Anyway, the copper is what makes the wood and the aluminum react. If there is copper in the wood, it could potentially be reactive (If the copper and aluminum never touch, no worries, but when/if the copper leaches out and reaches the aluminum, they will experience electrolysis).
If your pressure treated wood has NO COPPER, then you should be fine (unless it has some other metal that aluminum doesn't get along with - I work with aluminum, and don't claim to know everything in modern pressure treated wood). If it does, don't ignore simple chemistry. You don't want copper with aluminum. The most fruitful research at this point would likely be learning what exactly is in pressure treated ply, and what year(s) the regulations changed in requiring certain things to be or not to be included in the treating.
Also, don't get your hopes up too much because Tracker, or G3 or something along those lines uses them. These companies (Tracker more so than some, as they generally have the lowest prices for an equivalent boat), is designing a boat to a certain price point, and while the end result is usually fairly nice, there are corners cut in construction, which to most, wouldn't really have an issue, but to the guy that uses his boat hard, and puts it away wet, might show up as a problem. I've had a few G3 "All Welded" hulls in recently, and in every one of them, there is pressure treated plywood. It is wrapped with a heavy plastic, so it doesn't actually make contact with the aluminum.
Also, if I remember correctly, there was a member on here a year or two ago that had a brand new Lowe that developed corrosion holes in the transom within something like 9 months, likely due to the pressure treated ply in the transom (Lowe claimed to not know what happened, but refunded his money). Someone may want to go dig up that post.