Page 30: of Maritime Reporter Magazine (February 2, 2005)

30 Maritime Reporter & Engineering News total 300 microns to be specified.

Previously the minimum application film thickness for a single coat solvent free tank coating was in the order of 300 microns making the cost of coating complex structures, which required two coats to ensure good coverage, was in some cases prohibitive.

The flow, wetting of the steel and resistance to cracking at high film thicknesses mean that it is suited for application to pitted steel where a high degree of chemical resistance is required. Sigma Novaguard is a solu- tion for vessels such as product carriers where tanktop pitting can be a problem or FPSO's (newbuilding or conversion) where a relatively high degree of chemical resistance is essential com- bined with a long term performance requirements, as these vessels can typ- ically be on station for 10 to 20 years with little or no possibility for mainte- nance.

Supply vessels are another potential niche market, as these vessel's could use Sigma Novaguard's resistance to the many and varied cargoes carried on these vessels such as drilling brines, fuel oils, lubricating oil etc. The tanks on board these vessels are typically small, complex and difficult to coat.

Use of a solvent free system reduces health and safety risk as well as improving the working environment.

The solvent free nature of Sigma

Novaguard means that the coating is tolerant to over-application, an unavoidable problem in these small complex tanks.

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Jotun Debuts SeaForce

Jotun Coatings introduced the

SeaForce line, consisting of three new, cost-effective TBT-free antifoulings:

SeaForce 30; SeaForce 60; and

SeaForce 90. Complementing

SeaQuantum, the SeaForce-range is targeting the cost-sensitive market, offering a high solid self-polishing

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Offering a complete line of deck machinery as well as general fabrication, machining services, installation, maintenance and repair services.

Phone (228) 832-7655 Fax (228) 832-7675

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Water Cooled Manifolds,

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Turbos, Flex, and much, much more.

Marinization, Repair or Duplication of Obsolete Parts also available upon request.

Please contact us for all of your exhaust needs.

[email protected] http://www.mesamarine.com

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World Class Garnet Abrasives

Barton Mines Company, LLC • 1557 State Route 9 • Lake George, NY 12845

USA/Canada (800) 741-7756 www.barton.com

Maximize Production, Minimize Consumption

Offering a Full Range of

Mil Spec and CARB Approved

Garnet Abrasives. x Low Dusting x Less Than 0.3% Free Silica x No Heavy Metals

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Square Feet per Pound

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Coatings & Corrosion Control

Polyurea Coatings for Commercial Marine Apps

Alaska Oceans Seafood's Alaska Ocean, at 376 ft., is one of the largest fishing vessel's in the

U.S., with the capacity to harvest and process more than 500 metric tons of fish per day during each of the approximately 220 days per year she spends at sea. Completely rebuilt more than 12 years ago in Norway and converted into the trawler/processor it is today, Alaska Ocean rep- resents an initial investment of more than $60 million. The ship relies on a plethora of high-tech marine equipment to keep it out to sea and working nearly 220 days per year, including an advanced coatings system to protect it from the harsh environs within which it works. To this end, Alaska Oceans Seafood took a pioneering step in considering polyurea coatings for high- impact deck areas. Pure, 100-percent polyurea coatings, made possible by relatively recent advances in coatings technology, offer ultra-high film build plus outstanding abrasion, chemical and corrosion resistance. They also dry in as little as 30 seconds. Polyurea coatings are coming into wider use across many industries, and the marine market is no exception. Above the water line - and currently being evaluated for surfaces below the water line - these coatings are proving to be very effective in protecting steel, aluminum and fiberglass for areas ranging from decks to fish hold liners and bilge liners. The ship underwent a two-month dry dock at Todd Pacific

Shipyards in Seattle in the spring of 2004, specifically for inspections of its rudder and tailshaft, but the time was used for much more. Fishing gear, fish-finding equipment and factory process systems were all upgraded, and routine maintenance on engines were performed. Planning ahead, it was arranged for a test area of Sherwin-Williams EnviroLastic Polyurea to be applied and tested on the trawler for one fishing season. EnviroLastic AL 450 SS polyurea was applied to approximately 7,100 sq. ft. of the railings and steel decks of the Alaska Ocean. One of the benefits of the 100-percent solids, aliphatic polyurea coating system is its relatively slow gel time that enables smooth applications at thicknesses ranging from 30 to 250 mils, while providing a seamless, flexible and waterproof coating solution that can bridge cracks to 1/8-in. Also, it drys to the touch in 30 seconds, and can be safely walked on in just five minutes. The polyurea was applied to decks where fishing and offloading activities occur and frequently take a beating from crane hooks, steel blocks, shackles and huge, heavy nets, as well as trawl doors weighing sever- al tons apiece that mar the deck's surface. The crew used a Gusmer SPI 18/18 proportioning unit, D type spray gun, and 16 KW generator to power the heating units (pump and line) to main- tain the 160 degrees F material application temperature. Circle 27 on Reader Service Card

The preceding was excerpted from "Coatings Solutions", Spring 2004 edition.

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