Ecospeed: Ending Rudder Cavitation Damage Problems

Friday, October 07, 2011

Founded in 1893 Ernst Russ is a Hamburg based, family owned shipping company. For close to 120 years, Ernst Russ has been offering customers the highest standards in ship management. The company has a fleet of ten vessels including five ro-ro cargo ships. Due to their higher propeller revs, the rudders of these ro-ro cargo vessels suffered particularly from cavitation damage.  

 

Grzegorz Girjat is Superintendent of Ernst Russ, responsible for the five ro-ro ships. Those ships were built in 1999. The rudders were originally coated with a standard epoxy coating. Grzegorz Giriat explains, “During the first intermediate docking, between two and three years from launch, we observed that we already had extensive cavitation damage on the rudders. During that 2004 docking, Ecospeed was applied experimentally on the Elisabeth Russ. The application was close to the end of the docking. There was only time to grit blast the rudder and apply two coats of Ecospeed. The pitting and damage from the cavitation was not repaired but the paint simply applied over it.  

 

The trial was successful beyond all expectations. When the ship next came out of the water in 2007 it could be seen that, despite the last minute application, no further cavitation damage had occurred. As a result, the rudders of the remaining four ro-ro ships were coated with Ecospeed, all with similar results. Based on this the bulbous bows of all the ships were also coated with Ecospeed since these vessels trade in the ice and the traditional coating in use was not holding up in these conditions. The most recent drydocking of the Elisabeth Russ in 2011, confirms that the original Ecospeed protection applied in 2004 is still holding firm and the rudder is intact, free from any further cavitation damage. (see picture on the right)  

 

“In general everybody is looking to be in drydock as short as possible and to get all the work done as quickly as possible,” explains Grzegorz. “Additional hot work on the rudder inevitably results in some collisions with other jobs. I would say for me it is quite clear. Had we not applied Ecospeed on the rudders, we would certainly have extensive work to do in drydock.”  At least 110 rudders have now been coated with Ecospeed with 100% success. The number increases as more and more shipowners and operators find that there is indeed an answer to rudder cavitation damage. None of these rudders has suffered cavitation damage after the Ecospeed was applied and none has had to be recoated with Ecospeed.
 
 

Maritime Reporter July 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

FURUNO of Japan Increases Investment in ENL

ENL Group and FURUNO Electric Co. Ltd of Japan have announced that FURUNO has increased its investment into the New Zealand company to a total of 29.5%. The

SKANReg Recruits UK Ship Register's Mazumdar as CEO

After four groundbreaking years as head of the UK Ship Register (UKSR), Debasis Mazumdar is moving on to become CEO of the London-headquartered St Kitts & Nevis International Ship Registry (SKANReg),

S.Africa Considering Ship-Based Power Generation

South Africa could deploy power barges using gas to generate electricity to help overcome chronic supply shortages, a senior government official said on Tuesday.

Environmental

S.Africa Considering Ship-Based Power Generation

South Africa could deploy power barges using gas to generate electricity to help overcome chronic supply shortages, a senior government official said on Tuesday.

NYK Hosts Safety Conference

Over three dates in July, NYK hosted a safety promotion conference for shipowners and ship-management companies at the NYK head office in Tokyo and at Imabari city in Ehime prefecture.

El Nino Onset May Impact Panama Canal Drafts

The Panama Canal Authority closely monitors the water levels of Gatun and Alhajuela lakes on a regular basis due to the importance that these resources have for transit operations.

Fuels & Lubes

S.Africa Considering Ship-Based Power Generation

South Africa could deploy power barges using gas to generate electricity to help overcome chronic supply shortages, a senior government official said on Tuesday.

Koole Expands Rotterdam Operations

Koole Terminals has begun operations at the storage facility for petrol and diesel in Pernis that it recently acquired from BP.   The companies have a long-standing relationship.

Tanker Retrofitted with Dual Fuel Engine

Caterpillar Marine informs it has begin a dual fuel engine retrofit conversion onboard the 472-foot Fure West tanker, owned by Furetank Rederi A/B. The MaK M 43

Marine Power

S.Africa Considering Ship-Based Power Generation

South Africa could deploy power barges using gas to generate electricity to help overcome chronic supply shortages, a senior government official said on Tuesday.

Australian PM Promises 2500 Shipbuilding Jobs

Up to 2,500 shipbuilding jobs in Adelaide will be safe for "all time", the Prime Minister says, ahead of the expected announcement to build a new fleet of Navy ships worth $39 billion, reports ABC.

GE Gas Turbines to Power US Navy’s New Destroyers

The U.S. Navy’s new DDG 121 and DDG 122 Arleigh Burke-class destroyers will be powered by eight LM2500 marine gas turbines supplied by GE Marine, who also received

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Navigation Offshore Oil Pipelines Pod Propulsion Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1688 sec (6 req/sec)