Originally Posted by doocruiser
thks for that noelex,it is a very solid oz made dinghy so there should not be a corrosion prob.i certainly am not going to apply something that is a maintanence prob.i have heard of people rubbing in car wax/polish after cleaning,is there an issue with that ? will it effect the aluminum ?
Aluminium maintains is corrosion free state only in the presence of oxygen. If exclude oxygen you need to seal out moisture.
with any treatment like wax or polish is that you can seal out oxygen but have moisture trapped on enter.
The other potential problem if that if you seal the hull everywhere, but one tiny spot, say a scratch in the wax, in certain circumstances that spot can corrode (It becomes a bit like an anode would be). Finally aluminium needs to be in a reasonably PH neutral environment
not to corrode, if the polish or wax does not maintain this you will have problems.
You need to be particularly careful with dingys as they are often pressed out of aluminium that is too thin to weld so repairing is often impossible.
Having said all of that you are very unlikely to get any problems with car wax, but it sounds like you want to preserve the dingy and the best treatment is no treatment.
People are used to materials like steel
and wood where it is important to seal out seawater. Aluminium is not like that you can suspend some marine grade aluminium completely untreated in seawater and it will not have any corrosion.