Cleveland Cascades LtdTMS Awards 2021Bühler GmbHViganTelestackPort of South Louisiana
  • Port of Stockton
  • TBA Group
  • Coaltrans Asia 2021
  • TOC Events
  • Van Aalst
  • Telestack

One complete rudders and running gear solution

(Posted on 12/02/19)

 In the past year numerous rudders, thruster tunnels and nozzles were coated with the Ecoshield protective coating system designed specifically to give lasting protection against cavitation and corrosion damage.

In 2018 applications were carried out in shipyards in Turkey, the Netherlands, Singapore, Hong Kong, China, Japan, Denmark, Estonia, Germany and the United States and this on a wide range of ships. These included vehicle carriers, ferries, tankers, yachts, research vessels and container ships. The rudders as well as the running gear of these ships will be protected against cavitation and corrosion damage for the rest of their service lives.
 
Well over thirty vessels belonging to fourteen different owners were treated. Some of them were new Subsea Industries customers, some returning ones. They had experienced firsthand the devastating effect of cavitation when a traditional coating system is used. For this reason they decided to use Ecoshield to ensure lasting protection against corrosion and erosion damage for the rudders, nozzle rings and tunnel thrusters of their vessels.
 
Ecoshield has been designed to give a very thorough and lasting protection against cavitation and corrosion. If the cavitation cannot pierce the coating then no other damage can occur.
 
Tests conducted in a flow channel have confirmed that Ecoshield performs extremely well under severe cavitation. These tests were divided into six stages during which the coating was exposed to an increasing pressure drop, creating a growing cavitation force. Even after the last stage no erosion was present on the patch coated with Ecospeed.

Understandably the owner then wants to try to hold off going to drydock as long as possible and ideally until the five year interval has passed. Temporary repairs are carried out after which the class requires that a new inspection is performed every three months.
 
When such a vessel eventually comes into drydock, maintenance work on the vessel’s stern area, especially cavitation damage repair, can take a long time. Most of these repairs cannot be performed concurrently. This is the result of the close proximity of the rudder, the propeller and the stern area, along with the strict procedures concerning blasting, painting and welding work. Painting is therefore usually assigned to the end of the schedule and as a consequence may not get done at all or else prolongs the stay in drydock. Taking into account the tight drydock schedule of most vessels this is often very problematic.

The newbuild phase is the perfect time to apply Ecoshield. However, the coating can also be used to protect vessels that have been in service for some time and are already facing cavitation and corrosion damage.
 
Ecoshield’s flexibility makes it easy to adapt the application schedule to the rest of the activities at the shipyard or drydock in a way which does not interfere with them. Overcoating time can be as short as three hours. This means that for smaller surfaces such as rudders or bow thrusters the two required coats can usually be applied in one single day.

Latest News

Ocean Technologies releases 50 titles in Chinese

(Posted on 29/07/21)

Acknowledging the importance of China as a crew-supply nation, Ocean Technologies Group has added an... Read more


New Product Manager increases Superior’s wet processing resources

(Posted on 29/07/21)

Superior Industries, Inc., a U.S.-based manufacturer and global supplier of bulk material processing... Read more


New Bedeschi project for Italcementi

(Posted on 27/07/21)

Bedeschi has signed a new order with Italcementi for the supply of clay handling equipment and other... Read more


Survitec enhances lifeboat inspection solution

(Posted on 26/07/21)

Leading survival technology provider, Survitec, has relaunched its lifeboat inspection solution underpinned... Read more


Cimbria affirms sustainability focus with new Bamboo Chain Conveyor

(Posted on 23/07/21)

Cimbria, a world leader in the field of high-tech solutions for Grain & Seed processing, has strengthened... Read more


Takraf unloader key to Australian terminal’s expansion

(Posted on 20/07/21)

A TAKRAF double jib level luffing ship unloader has arrived at an important deep-water port on the Australian... Read more


RIX Shipmanagement selects KVH’s CaaS programme

(Posted on 15/07/21)

Global dry-cargo and multipurpose ship operator RIX Shipmanagement Ltd has chosen KVH Industries&rsquo... Read more


ABB’s new digital solution helps optimize ship performance

(Posted on 15/07/21)

New online platform, ABB Ability Marine Fleet Intelligence – Advisory, combines the power of cloud... Read more


Mastermind and DESMI sign BWMS agreement

(Posted on 13/07/21)

Mastermind Shipmanagement Ltd., Navkratis Ltd., and DESMI Ocean Guard A/S have announced that Mastermind... Read more


From Rostock to the world

(Posted on 11/07/21)

Since the start of production in 2005, Liebherr-MCCtec Rostock GmbH has manufactured and delivered well... Read more


Sailors SocietyTOC EventsTBA GroupThe Wolfson Centre for Bulk Solids Handling Technology Coaltrans Asia 2021Cimbria
  • Cleveland Cascades Ltd
  • Cimbria
  • Bühler GmbH

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping