TOC EventsStemmTelestackThe Maritime Standards Awards 2018Vigan Engineering S.ACimbria Bulk Equipment A/S
  • TBA - Software Solutions & Services for ports, terminals & warehouses
  • Multimodal 2018
  • TMS Awards 2016 winners
  • Ovet
  • Cimbria Bulk Equipment A/S
  • TMS Tanker Conference 2018

Ecoshield proven to prevent cavitation erosion

(Posted on 24/05/18)

Damage to rudders, running gear and the stern areas of ships due to cavitation is a perennial problem for shipowners, operators and managers, resulting in damaged protective coatings, erosion of surfaces, and ultimately, corrosion.

Belgian company Subsea Industries, however, claims it has the answer with its Ecoshield coating.

Following successful flow channel tests undertaken at Grenoble by the French Ministry of Defence, it was demonstrated that the hard-type coating offers a higher degree of protection, even under severe cavitation.

The tests were undertaken in six stages, during which Ecoshield was exposed to increasing pressure drops, creating a growing cavitation force. Even after all stages, the test patch showed no erosion.

“Cavitation on rudders can result in conditions being imposed by class, which can impact sailing schedules by preventing access to certain ports or requiring more frequent dockings and additional costs,” said Manuel Hof, Production Executive of Subsea Industries.

“No shipowner wants to go to drydock unless it’s absolutely necessary, and certainly not before the usual five-year interval has passed. And even at standard docking intervals, repairs to cavitation can involve extra time because of the close proximity of rudders, propellers and surrounding stern areas, necessitating special procedures for blasting, welding and painting work.

“Subsea Industries’ Ecoshield coating has been developed especially for areas that are subject to cavitation. It is a specially reinforced version of the company’s well-proven Ecospeed, offering similar advantages, but with even greater strength.

“Designed to be applied over areas that are subject to high stress levels, it cannot prevent cavitation occurring, but resists damage to the coating thanks to its unique combination of impenetrability with sufficient flexibility to absorb cavitation forces. If cavitation cannot pierce the coating, no corrosive damage can occur,” furthered Hof.

According to the manufacturer, Ecoshield avoids additional drydocking problems as it is designed to remain intact for the lifetime of the vessel and is guaranteed for ten years. No repainting of running gear will normally be needed during drydocking, normally only light touch-ups to less than 1% of the surface area will be needed.

“This makes planning the maintenance schedule for the vessel’s stern area much easier,” said Hof. “With conventional coatings, painting the stern area and running gear is normally assigned to the end of the schedule and as a consequence may either be rushed, or involve an extended stay in dock. Ecoshield avoids the risk of such difficulties.”

A further benefit is that the ease and flexibility of application make Ecoshield suitable for application at any stage in the docking process, rather than the docking schedule having to be arranged or extended to suit the coating system. With a minimum overcoating time of three hours, the required two coats can be applied to areas such as rudders, propellers or thruster tunnels in a single day.

“Taking into account the costs of temporary underwater repairs and regular inspections required as a condition of class until the next drydocking, it becomes clear that investment in Ecoshield is soon paid back,” Hof explained. “It is no surprise then that more and more owners are applying Ecoshield to both newbuilds and existing ships.”

Latest News

Lock entry system aids in preventing damage

(Posted on 09/11/18)

The technology group Wärtsilä has developed a lock entry assist system that will facilitate... Read more


Eagle Bulk’s results in “steadily rising market”

(Posted on 09/11/18)

Eagle Bulk Shipping Inc. one of the world's largest owner-operators in the Supramax / Ultramax segment... Read more


ICS Chairman calls for training regime revision

(Posted on 09/11/18)

Speaking in Manila, the Chairman of the International Chamber of Shipping (ICS), Esben Poulsson, has... Read more


AtoB@C Shipping acquires a 4,100 dwt dry cargo carrier

(Posted on 09/11/18)

AtoB@C Shipping AB, a Swedish shipping company owned by Aspo's ESL Shipping, has acquired a 4,100 dwt... Read more


Seanergy’s scrubber deal with bulk charterers

(Posted on 01/11/18)

Seanergy Maritime Holdings Corp has announced that it has entered into commercial agreements for the... Read more


ClassNK Releases “PrimeShip-GREEN/ProSTA ver.ITTC”

(Posted on 01/11/18)

Leading classification society ClassNK has released “PrimeShip-GREEN/ProSTA ver.ITTC” on... Read more


Hong Kong’s potential as even more attractive arbitration hub

(Posted on 01/11/18)

Hong Kong has the potential to become an even more attractive international hub for arbitration in the... Read more


Converting optimism into Trade Growth

(Posted on 01/11/18)

The fourth annual The Maritime Standard Ship Finance and Trade Conference is being held at the Sheraton... Read more


New CEO for Lauritzen Bulkers

(Posted on 24/10/18)

J. Lauritzen has announced the appointment of Niels Josefsen as CEO of Lauritzen Bulkers.Niels Josefsen... Read more


Scorpio Bulkers reports 60% revenue increase

(Posted on 24/10/18)

Scorpio Bulkers Inc. has reported its results for the three and nine months ended September 30,... Read more


DocksolidCleveland Cascades LtdTBA - Software Solutions & Services for ports, terminals & warehousesTMS Tanker Conference 2018Sailors SocietyMultimodal 2018
  • The Maritime Standards Awards 2018
  • MULTIMODAL 2019
  • TOC Events
  • Cleveland Cascades Ltd

Subscribe to our newsletter

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