Aggressive Corrosion in Austal's Pride and Joy

Was thinking about getting rid of this page just last week.

But wait!, the story never seems to die:

Source: http://www.bloomberg.com/news/2011-06-17/navy-finds-aggressive-corrosion-on-austal-s-combat-ship-1-.html

"Navy Finds ‘Aggressive’ Corrosion on New Ship"
By David Lerman and Tony Capaccio - Jun 17, 2011

The U.S. Navy has discovered “aggressive” corrosion in Austal Ltd. (ASB)’s first new combat ship designed for operating close to shore.

The corrosion is in the propulsion areas of the USS Independence, the Littoral Combat Ship built by the Mobile, Alabama-based subsidiary of Australia’s Austal and General Dynamics Corp. (GD)

“This could be a very serious setback,” said Norman Polmar, an independent naval analyst and author in Alexandria, Virginia. “If the ship develops a serious flaw, you’re not going to continue producing them.”

Permanent repair will require drydocking the ship and removing its “water jets,” a key component of the propulsion system, the Navy said in a written statement to congressional appropriations committees provided to Bloomberg News.

Aluminum-hulled ships such as Austal’s tend to rust faster than steel-hulled ships, Polmar said. “But I’m surprised it happened so early,” he said. “This ship is brand new.”

The corrosion discovery in a ship that was commissioned in January 2010 marks another blow to the Littoral Combat Ship program, planned to ultimately consist of 55 ships. In February, the Navy discovered another ship in the series, from another construction team, had a crack through the hull.

Close to Shore

The Littoral Combat ships are designed to operate closer to shore than the rest of the Navy's surface fleet. They would make up about 17 percent of the Navy’s planned 313-ship fleet. Missions include clearing mines, hunting submarines and providing humanitarian relief.

The Navy in December awarded contracts for as many as 10 Littoral Combat ships to each of two teams of builders, led by Lockheed Martin Corp. (LMT) and Austal.

Austal won a $465 million contract that could reach as much as $3.78 billion if all options are exercised, the Navy announcement said. Building all 55 ships will cost the Navy at least $37.4 billion, according to a Pentagon report released in April.

Officials were concerned about the potential for corrosion during construction of the ship because of “dissimilar metals,” particularly near the steel propulsion shafts, the Navy memo said.

Temporary repairs will allow the ship to operate safely in the interim, the Navy said. The Littoral Combat Ships are designed to last about 25 years. Each ship is expected to cost about $36.6 million a year to operate and support.

Two Versions

The Navy is buying two versions from two teams of builders. The other team consists of Bethesda, Maryland-based Lockheed and Marinette Marine Corp. of Marinette, Wisconsin.

The first Lockheed ship developed a crack as long as six inches through its hull during sea trials in February, prompting a Navy investigation of the design.

Calls to Austal and calls and e-mails to General Dynamics weren’t immediately returned.

The Austal ship is now in Mayport, Florida, undergoing additional testing, the Navy said in its statement. A permanent repair of the existing corrosion damage would be conducted next year, the Navy said.

The Navy statement did not provide an estimate of the cost of the repair work.

Interesting...

From: http://www.sys-con.com/node/1153705

"General Dynamics' Littoral Combat Ship Independence Completes Builder's Trials"
By: PR Newswire Oct. 21, 2009

MOBILE, Ala., Oct. 21 /PRNewswire-FirstCall/ -- Independence (LCS 2), the innovative high-speed trimaran combatant ship being constructed by shipbuilder Austal USA in Mobile, Ala., as part of the General Dynamics Littoral Combat Ship Team, successfully completed a series of tests known as builder's trials on October 18 in the Gulf of Mexico. The trials included more than 50 demonstration events that rigorously test the ship and all of its systems in preparation for final inspection by the Navy before delivery.

Notable achievements during the trials included reaching a sustained speed of 44 knots during the required four-hour full-power run, with a top speed in excess of 45 knots...

Many of the test events were conducted in high sea-state and wind conditions (8-foot waves and winds in excess of 25 knots). Despite the weather, the ship repeatedly reached speeds of over 45 knots with propulsion and ride-control systems operating in full automatic mode, proving the effectiveness of the control systems and the highly efficient and stable characteristics of the trimaran hull form.

A series of high speed ahead and astern maneuvers in these sea state conditions proved the effectiveness of the ship's four steerable water jets. During the repeated high-speed turns the ship demonstrated excellent agility and stability characteristics.

The ship's flight deck remained stable despite sea state conditions and maneuvers...

General Dynamics Bath Iron Works is the prime contractor for the General Dynamics Littoral Combat Ship Team. Partners include shipbuilder Austal USA (Mobile, AL); General Dynamics Advanced Information Systems (Fairfax, VA); BAE Systems (Rockville, MD); L3 Communications Marine Systems (Leesburg, VA); Maritime Applied Physics Corporation (Baltimore, MD); and Northrop Grumman Electronic Systems (Baltimore, MD).

Bath Iron Works employs approximately 5,700 people. Since 1991, BIW has manufactured and delivered 31 Arleigh Burke-class destroyers; the shipyard is also building the lead ship of the Navy's Zumwalt (DDG 1000) class of guided missile destroyers.

Austal USA's Mobile facility currently employs almost 1,000 workers and is the largest aluminum shipyard in the world. In addition to the LCS, recent projects have included construction of the largest-ever aluminum ferry in the United States. Austal is also in the pre-construction design phase on the first Joint High Speed Vessels (JHSV) for the U.S. Department of Defense...