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

Ship Repair & Conversion

The 2nd Ballast Water Management Summit

Sign-up for this year’s most in-depth exchange of information and best venue for BWT stakeholders to network and meet their regulatory peers is underway.   Infocast’s

Zamakona Refits Vessels VOS HERA & HADES

The Zamakona Yards in Pasajes has successfully finished the works carried o t in the vessels VOS HADES and VOS HERA that belong to the Company Vroon Offshore Services UK.

Arab Shipping Firm Orders 2,000 New Reefer Containers

Container shipping line United Arab Shipping Company (UASC) has ordered 2,000 reefer containers from Daikin.  As part of the emerging global carrier’s investment in the cutting-edge,

Marine Power

KR Launches Software to Aid ECA Compliance

The Korean Register (KR) has launched an in-house developed software program to assist vessels with fuel oil change over when complying with the new low sulphur regulations.

New Defense Cooperation with India

Today, on his historic visit to India, President Obama and Prime Minister Modi announced new, ground-breaking agreements on defense cooperation between India

Asean: Malaysia Prepares to Set Sail Into Maritime Disputes

Will Malaysia’s chairmanship of Asean spur the establishment of a long-delayed maritime Code of Conduct (CoC), aimed at resolving territorial disputes between China

Marine Equipment

The 2nd Ballast Water Management Summit

Sign-up for this year’s most in-depth exchange of information and best venue for BWT stakeholders to network and meet their regulatory peers is underway.   Infocast’s

Huisman Cranes for New Maersk Subsea Support Vessels

In December 2014, Huisman secured a contract from COSCO (Dalian) Shipyard for the delivery of four customized 400mt Rope Luffing Knuckle Boom Cranes and two 100mt

Coast Guard Cutter William Trump Commissioned

The Coast Guard Cutter William Trump was commissioned during a ceremony at Coast Guard Sector Key West Saturday Jan. 24, 2015. The Trump is the 11th fast response cutter in the Coast Guard fleet.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Salvage Ship Repair Sonar
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: 0.1364 sec (7 req/sec)