Feature 1 | SHIPBUILDING TECHNOLOGY, MATERIALS & METHODS
A Bioship carrying logs for the timber trade with its crane unloading the cargo. The crane can be adapted for other cargoes - including containers. and Estonia; with the return cargo of peat /
woodchips back to Finland, what is required in both cases is the ability of the vessels to operate profi tably at small and shallow ports using its own gear all year round. By operating with these vessels the operator obviates the need for the many
trucks that would need to deliver the fuel supply to the power station instead, that would in itself off er fuel effi ciencies as well as reducing congestion and making roads safer. Ships of this type could be used in many shallow water ports around the globe
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SIGMACOVER 350 – The versatile primer/fi nish SIGMACOVER™ 350 coating is
proving to be a versatile member of the SIGMACOVER product range of recoatable epoxy systems sold under the PPG Protective & Marine Coatings global SIGMA COATINGS® brand. T is surface tolerant epoxy primer/fi nish is
now available in all colors, making it suitable for topsides, superstructure, decks and fi ttings. The proven success of SIGMACOVER
350 has been due, in the main, to PPG´s program of simplifi cation to its global SIGMA COATINGS products. It is available in all major ports worldwide and can be used for multiple areas as a primer/fi nish coat for all above water locations. Whilst at sea it is often impossible to
prepare rusty surfaces to the high standards of surface preparation required by traditional primers in order to ensure that they perform to expectations. SIGMACOVER 350 has been designed for use where surface preparation is not optimal. It is suitable for use on mechanically pre‐treated surfaces and clean,
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and could be a part of the solution to the increasing number of trucks that are clogging up the world’s arterial road routes. A key to unlocking the potential of the waterways is lighter ships and this, in turn, requires lighter materials. ALF and SAS could be the breakthrough material. NA
aged intact coatings. T is added versatility ensures good adhesion to marginally prepared surfaces. SIGMACOVER 350 is tough and abrasion
resistant, and a selected range of colors can be used in dry cargo holds. It has independent certification for the carriage of dry foods and the glossy appearance facilitates ease of cleaning, thereby signifi cantly reducing the time between cargoes. It is also possible to transport paper and forestry products in holds coated with SIGMACOVER as the product is aluminium free. SIGMACOVER 350 is fast curing when
compared to other alternative products on the market. T ere is also a low‐temperature curing version available to allow work to proceed when cold conditions may preclude the use of other two‐pack primer/fi nishes. SIGMACOVER 350 offers real benefits
and versatility to ship operators who are conducting coating applications in service. By using this proven primer/fi nish, downtime and maintenance costs are reduced, whilst the
performance lifetime of the applied system is increased. T is adaptable multi‐purpose epoxy off ers
a number of key benefi ts: • Surface‐tolerant coating for decks, interior, superstructure, topsides and dry cargo holds
• Primer/fi nish compatible with existing aged coatings
• Independently certifi ed for the carriage of dry food
• Good impact and abrasion resistance • Fast curing with year round application • Glossy fi nish – facilitating ease of cleaning • Available in a full color range
The Naval Architect July/August 2011
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