How long can stages be left underwater?

[Tracy]

What about the regs?

I remember the pilot was rotted through. Not sure about the first stages.
@BoneCrusher would know, he and his wife are who recovered them.

 

[211ratsbud]

Just curious, what and how are people fitting anodic protection to scuba bottles?

 

[Tracy]

Just curious, what and how are people fitting anodic protection to scuba bottles?

Scuff the aluminum and hose clamp it in place.

 

[Addison Snyder]

Link to a good cheap anode? Most of the ones I'm seeing are massive.

 

[grantctobin]

Link to a good cheap anode? Most of the ones I'm seeing are massive.

Cut them up?

 

[Tracy]

Link to a good cheap anode? Most of the ones I'm seeing are massive.

These are what you want for Aluminum tanks in fresh water.
They come in a 36" strip and you can cut them into 6" pieces.

Marinette Hull & Rudder Aluminum Anode Strip; 3-foot length

Marinette Hull & Rudder Aluminum Anode Strip; 3-foot length

www.boatzincs.com

 

[fsardone]

These are what you want for Aluminum tanks in fresh water.
They come in a 36" strip and you can cut them into 6" pieces.

Marinette Hull & Rudder Aluminum Anode Strip; 3-foot length

Marinette Hull & Rudder Aluminum Anode Strip; 3-foot length

www.boatzincs.com

Sure about that?
I thought that, in order to protect aluminium, you would need a less noble (more electropositive) metal to be corroded like zinc (sacrificial anode).
Why would the aluminium strip corrode and not the aluminium of the tank?
Unless you are talking about protecting a steel tank, in such case an Al anode would work (I believe).

 

[Tracy]

Sure about that?
I thought that, in order to protect aluminium, you would need a less noble (more electropositive) metal to be corroded like zinc (sacrificial anode).
Why would the aluminium strip corrode and not the aluminium of the tank?
Unless you are talking about protecting a steel tank, in such case an Al anode would work (I believe).

Yes. I am sure about that.

 

[GF99/99]

A friend dropped a full 80% deco BO while loading on a boat and it was found over a year later. Aside for some growth on it everything was in perfect working order.

 

[PfcAJ]

Yes. I am sure about that.

Why would the aluminum corrode before the aluminum?