Nippon Paint Marine has added a new system to its Nippon Optimised and Advanced (NOA) range of self-indicating epoxy coatings. The addition will protect chemical and product carrier tanks from corrosion and cargo contamination.
NOA PC 700, a phenolic/novolac-based epoxy, is resistant to a wide range of chemicals, solvents and petroleum products, including those containing xylenes, methyl ethyl ketone, methanol, caustic soda and LSA fuel oil.
“The addition of NOA PC 700 to our established NOA range significantly protects inner cargo tanks from corrosion while preventing cargo contamination. As with all our NOA coatings, application is self-indicating which enables the applicator to visually confirm the correct (wet/dry film thickness has been achieved during the application process. Correct film thickness is crucial to mitigating against corrosion risk to maintain ship structural strength,” said Makoto Nakagawa, general manager sales and marketing, Nippon Paint Marine Coatings, Osaka.
“Achieving correct film thickness, especially on edges and corners, is a challenge but this remarkably simple concept allows shipyard staff, surveyors and coatings inspectors to literally see when the coating has been correctly applied. If the coating appears transparent, then film thickness is incorrect. When it is opaque, correct film thickness has been achieved,” added Mr Nakagawa.
Hiro Yamashita, technical manager, Nippon Paint Marine (Europe), explained further: “While NOA application improves coating quality and helps to reduce manhours and costs, the coating system is fundamental to maintaining structural integrity. This is becoming more and more apparent with the increase in areas requiring coating and the reduction in the availability of skilled applicators.
“In drydock, for instance, our NOA 10M system – specifically developed for hull maintenance and repair – means just one touch-up coat can be applied in the knowledge that the self-indicating function will ensure that the thickness applied is correct. This means fewer days in dock, which contributes to lower drydock costs for the owner. By improving a ship’s corrosion resistance through more accurate coating application, ships are less prone to rusting early.”