Galvanic Corrosion in the US Navy

[CarlF]

It seems that the new USS Independence is "falling apart" from galvanic corrosion where the aluminum hull attaches to the stainless water jets. The Navy blames the builder (Austal and General Dynamics) for leaving out corrosion control systems to save money. Austal blames it on the US Navy's poor maintenance (I guess not changing the zincs )

This sound like your basic multihull saildrive warranty claim -- except for the missiles, guns, and helipad topsides.

Cool video:

YouTube - ‪USS Independence (LCS 2)‬‏

Carl

[CarlF]

I also noticed in the video that the Navy seems to be going with a Danforth (or Fortress?) anchor.

Maybe a rollbar anchor would get in the way of the forward gun (a BAE Mk 110 57 mm gun that fires 220 rounds a minute with a range of 9 miles )

Carl

PS - I wonder if the pirates off Somalia have seen that gun?

[Pete7]

Nah, ordinary basic cheap mild steel is magnetic so you wouldn't want any old chinese made mild steel anchor on the latest sexy speed machine

Americans should buy american goods, including anchors

[beneteau-500]

A GOOD AUSTRALIAN DESIGNED CAT And funny thing is the Australian navy and all the ferry company's around the world don't have the same prob and on the 2/7/11 the US have ordered another four of these cats costing around $300mil

[Kettlewell]

A GOOD AUSTRALIAN DESIGNED CAT

It's a Tri.

[avb3]

Originally Posted by CarlF

...It seems that the new USS Independence is "falling apart" from galvanic corrosion where the aluminum hull attaches to the stainless water jets.

So, is that why the bilge pumps are going a million miles an hour? Jezus H. Christopher, you could power a small cities water supply with amount of stuff they are pumping out.

[Jim Cate]

Originally Posted by avb3

So, is that why the bilge pumps are going a million miles an hour? Jezus H. Christopher, you could power a small cities water supply with amount of stuff they are pumping out.

Actually, mate, one might guess that the discharge seen in the video is cooling water from engines or gen sets, not bilge pumps.

Sure is a cool looking ship, though!

Cheers,

JIm

[SkiprJohn]

U. S. Navy anchors are usually stockless and very heavy. They are designed that way so that they can be run over and broken free quickly.
kind regards,