Stainless steel integral water tank

Hello,

I am wondering how a stainless steel integral water tank could be built into the steel hull of my boat. The keel is quite wide and there are already a few tanks in there.

Do you have to separate the two types of steel from each other to prevent electric charges?

 

There are may stainless steel hose clamps with a galvanized screw. Put one in a glass of water with some salt for a week and you'll see how fast the screw is eaten by corrosion.

 

You don't need stainless for water. Rotomolded plastic or a collapsible bag in a fiberglass liner is a better choice without the corrosion issues .

 

A plastic tank or a bladder would be a better and cheaper solution.

 

Where I work we often bolt stainless steel to other steel, using galvanized bolts. I've not seen any increased corrosion on the mating surfaces. I'm presuming that the inside of your boat is reasonably dry; submerging the tank and steel hull joint in salt water is a different case.

In your situtation I would bolt the stainless steel tank to the steel hull with galvanized bolts. I would not connect metal pipes to the tank, only plastic or rubber. I would also distrust my advice and inspect fastenings every now and then. There are different kinds of both stainless steel and hull steel, so it's reasonabel to play safe.

Erik

 

Thanks all for the feedback.

Erik - just what I was looking for.

Plastic people If I were to put in plastic, I may as well epoxy coat the steel hull? (It's a rectangular bilge).