How to stop Pitting/Corrosion?

[cpr]

Does anyone know how to stop pitting and corrosion on aluminum. I think what I have is cervice corrosion. I removed my floor and foam which was all waterlogged and very wet to find pitting inside the hull. Is there any way to stop this from getting worse?

 

[bigwave]

Not sure how the boat was set up before you dug into it. I suspect that you had a wire grounded somewhere and this was causing electrolysis. Hard to say. It could also be from a piece of un-alike metal touching that area too. If it is not too bad just fill the pits with 5200 or Marinetex...sand,prime,paint. It is easy to do. I know, I have lots of that going on on my transom.

 

[GGUG]

If you do have electronics grounded to boat or you leave your boat in the water where there is electricity bleeding through the water from bridges, docks, etc... structures with power. You will need to set up a grounding system in your boat with anodes. The best anodes are the ones with the most zinc content. Stay away from camps and order your zincs from Zimar in Davie, FL. Then you have to mount them on the outside of boat, transom is best, and they need to have a grounding wiring connected to them as well as boat. The science behind this is that the zincs will eat away 1st rather than your boat when done right.

 

[dettmer13]

If you do have electronics grounded to boat or you leave your boat in the water where there is electricity bleeding through the water from bridges, docks, etc... structures with power. You will need to set up a grounding system in your boat with anodes. The best anodes are the ones with the most zinc content. Stay away from camps and order your zincs from Zimar in Davie, FL. Then you have to mount them on the outside of boat, transom is best, and they need to have a grounding wiring connected to them as well as boat. The science behind this is that the zincs will eat away 1st rather than your boat when done right.

Huh... Never knew that. It feels like one of those "The More You Know" commercials. This site rocks.

 

[GGUG]

I want to make an adjustment on my answer to solving pitting and corrision with anodes and grounding wire. A grounding wire is only needed on larger vessels. (which is what I usually work on) On a smaller metal hull, you only need a zinc (anode) bolted through hull below water. A plate zinc (transom zinc) is plenty. Once again, do not waste money on your anodes that most marine stores offer. Zimar Zincs in Davie, FL is the place. Of course if you have to, your local zincs are better than nothing.