ECOSHIELD Rudder Protection Launched

MarineLink.com
Tuesday, September 10, 2013

After more than 10 years of testing, Subsea Industries, a Hydrex company, has launched the rudder protection coating, Ecoshield, for permanent protection against cavitation damage for rudders. The glassflake reinforced coating protects the rudder for the service life of the ship without need for recoating or major repair and comes with a ten-year guarantee. Ecoshield is also suitable for bulbous bow, stabilizer fins, thruster nozzles and other underwater ship gear which needs special protection from corrosion.

Until now, the problem of cavitation damage to rudders, causing erosion, pitting and sometimes complete failure, Hydrex said, necessitating very expensive repairs or replacement has remained unsolved. The need for repair to rudders, involving welding and resurfacing in drydock has been almost universal. The cost of rudder maintenance and the safety hazards connected with worn and failing rudders are out of proportion to the relatively small surface area involved. Efforts to solve this problem have taken the form of redesigning the rudder, changing its position relative to the propeller, trying various materials including stainless steel, metal facing the surface, cathodic protection and a variety of coatings. But the problem has persisted.

Now a very durable, tough, long-lasting glassflake resin coating is putting an end to these problems. Ecoshield is a specifically reinforced version of the well-known Ecospeed non-toxic underwater ship hull coating which is designed for the entire underwater hull of any ship or boat. Small but significant variations of the Ecospeed formula have been tested on rudders since 2002 with extraordinary results. Ships that were experiencing heavy cavitation damage to their rudders, once the glassflake coating was applied, have seen no further cavitation damage erosion for as long as 10 years after application, with no sign that the coating will need replacement during the life of the ship.

Ecoshield is designed to be applied at newbuild (best) or in drydock for ships already in service. Application is simple. It requires blasting to create a 75µm profile and a surface preparation of SA 2.5 or SP 10 and then the glassflake paint is applied in two coats to a thickness of at least 1,000 µm DFT, with an overspray time of about three hours minimum and no maximum. A pitted rudder can be repaired using a thick resin paste (a new, soon-to-be-announced product) which is capable of building up the pitted surface to its original form and which is as tough or tougher than the steel it is used to fill. The heavy glass content of Ecoshield insulates the rudder or other part, making cathodic protection systems including sacrificial anodes virtually unnecessary, as evidenced by the very little wear on the anodes when a ship’s rudder, coated in this way, is inspected in dry-dock and by the fact that an impressed current can be turned right down with no ill effect.

Evidence of the success of the new product is the number of companies who began by coating one rudder experimentally and who, after seeing the results in service, have ordered this coating for the rudders on other ships with plans to convert their entire fleet. Shipowners who have previously applied Ecospeed to rudders on ships in service are specifying the coating for the rudders and other underwater gear on their newbuilds.

Ecoshield comes with a 10-year guarantee. According to the manufacturer, it is the only coating known to fully protect a rudder from all cavitation damage.

ecospeed.be
 

Maritime Reporter October 2013 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Volvo Penta's New Keel Cooling Option

Volvo Penta is offering factory-built keel-cooled engines for the entire line of marine commercial inboard and sterndrive D4 3.7-liter and D6 5.5-liter engines.

Permanent Magnet Technology for Maritime Propulsion

Multipurpose vessels, especially those that operate primarily at part loads, have been facing pressure when it comes to making money in today’s business environment.

‘Green’ Hybrid-powered Research Vessel Christened

The Maritime Aquarium at Norwalk christened a larger, “greener” new research vessel on Friday, September 26 in preparation for launching a new era in examining,

Ship Repair & Conversion

Industry Professionals to Speak at ShipConstructor Conference

The speakers representing various companies at next week's SSI Americas ShipConstructor User Conference, October 7-9, 2014 in Mobile, Alabama, demonstrate SSI's

HII Appoints Brenton as Corporate Director

Huntington Ingalls Industries (HII) announced today that Capt. Kevin Brenton (U.S. Navy, Ret.) has joined the company as corporate director of customer affairs for submarine programs.

New Simulation Tool for Collision Reconstruction

BMT ARGOSS and BMT Surveys, subsidiaries of BMT Group Ltd, the international design, engineering and risk management consultancy, announced an innovative new service

Coatings & Corrosion

Hempel Launches AvantGuard Primers

Hempel announced the launch of HEMPADUR AvantGuard, a portfolio of three new anticorrosive zinc primers designed for C4 and C5 corrosive conditions. Based on new patented AvantGuard technology,

Global Marine Lubricants Market to Value $9.36b by 2018

A global market report published by Transparency Market Research, entitled Marine Lubricants Market - Global Industry Analysis, Size, Share, Growth, Trends and Forecast,

Pettit Launched Water-based Antifouling Paint

Pettit Marine Paint, manufacturer of high performance marine coatings, announced today the release of an entry-level water-based antifouling paint, Neptune 5. This

Marine Power

General Dynamics Bags $ 50 mi Submarine Contracts

General Dynamics Advanced Information Systems, a business unit of General Dynamics was awarded two contract modifications totaling $50 million to continue supporting

General Dynamics takes Rudy deLeon on Board

The board of directors of General Dynamics has elected Rudy deLeon to be a director of the corporation, effective September 30, 2014. DeLeon is a senior

Volvo Penta's New Keel Cooling Option

Volvo Penta is offering factory-built keel-cooled engines for the entire line of marine commercial inboard and sterndrive D4 3.7-liter and D6 5.5-liter engines.

Marine Equipment

General Dynamics Bags $ 50 mi Submarine Contracts

General Dynamics Advanced Information Systems, a business unit of General Dynamics was awarded two contract modifications totaling $50 million to continue supporting

Swissco Doubles Rig Fleet

SGX Mainboard-listed Swissco Holdings Limited an integrated, international marine services provider, today announced having completed the acquisition of four additional mobile offshore drilling units,

Swire Pacific Acquires 3rd L Class PSV

Shipowner and operator, Swire Pacific Offshore Operations (Pte) Ltd (SPO) celebrated the naming and delivery of its third L Class PSV vessel, Pacific Legend in Kyoto,

 
 
Maritime Contracts Naval Architecture Offshore Oil Pipelines Pod Propulsion Port Authority Ship Electronics Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1938 sec (5 req/sec)