U.S. Navy’s “Brand New” Aluminum Ship: Foiled by Seawater

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USS Freedom (top) and USS Independence / Navy photos

You can’t make this stuff up: the Navy concedes the first vessel in its latest fleet of warships — the 18-month old USS Independence (not to be confused with the late aircraft carrier sporting the same name) — is suffering from “aggressive” corrosion. Both the Navy and the ship-builder say it’s no big deal, and to be expected when steel and aluminum components slosh around together in salt water. Like in an ocean, for example.

The Navy, eager to keep its fleet numbers up, is now buying two competing versions of these so-called Littoral Combat Ships. The planned $37.4 billion buy of 55 of the corvette-like (3,000-ton, 75 crew) vessels emphasizes coastal warfare instead of the blue-ocean mayhem their bigger brothers and sisters — frigates, destroyers, cruisers and aircraft carriers — are built to fight. Unfortunately, the first LCS built by (Australian-owned) Austal Ltd. in Mobile, Ala., is an aluminum-hulled trimaran that has been corroding into the sea. “I’m surprised it happened so early,” naval scholar Norm Polmar told Bloomberg News. “This ship is brand new.”

The Navy says the problem is manageable, and, besides that, Austal says, it’s the Navy’s fault (it also issued a painful-to-read statement suggesting it’s nothing new). Both agree such teething problems aren’t unusual in a new class of vessels. But the salt-water rot could give foes of aluminum vessels a weapon. “It gives fodder to people who for so long have said that buying an aluminum ship would be problematic for the Navy,” Jay Korman, of the Washington D.C.-based Avascent Group, told the Mobile Press-Register, the shipyard’s hometown paper. “It’s a perception issue as much as structural issue.”

Of course, it may be tough for Austal’s competitor — a Lockheed-Martin led (but Italian-owned) team building a steel-hulled LCS in a Wisconsin yard — to brag: its first ship, the USS Freedom, suffered a major crack in its hull during sea trials earlier this year. Maybe when they fix these ships the Navy can rechristen them: the USS Independence From Corrosion and the USS Freedom From Cracking.



In the early 1960's the US Army decided to test Aluminum  fro tanks as it was light in weight and they thought it would require less maintenance

After the completed one  $2 million dollars   and tested it they found small  arms such as a 7.62 x 39 bullet would easily penetrate the  cabin  .  Shame the navy and army never talk to each other  on the pit falls of using  materials that can   easily be destroyed  by a teenager with a rifle  


Does the navy understand Aluminium burns at half the temp steel ? Does the navy understand that gasoline ignites with just a spark ? Does the Navy understand that a small boat with a 50 Cal could send this boat to the bottom with the hull burning for days under water as  that much Aluminum  could not be put out once temp of above 1400 f . 

Yes they float in 10' of water but the up side , but they float like beach ball on top water , the crew can not operate in any bad weather. They are a death trap , They are 55 Billion dollars worth of junk , just to line a defence contractors and politicians pocket , One day this crap need stop  


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