Nippon Paint has launched the latest chemical tank coating variation of its self-indicating paint
In 1998, Nippon Paint launched a range of paints under the banner Nippon Optimised and Advanced (NOA) coating system. The key feature is that the NOA coating uses pigments that have various opacities depending on film thickness. The NOA coatings are self-indicating in that if the layer is too thin, the NOA coating remains transparent. Once optimal thickness has been reached, the coating becomes opaque.
Nippon Paint Marine has added to its NOA range of self-indicating epoxy coatings with a new system specially developed to protect chemical and product carrier tanks from corrosion and cargo contamination.
NOA PC 700 is a phenolic/novolac-based epoxy and is resistant to a wide range of chemicals, solvents and petroleum products, including those containing xylenes, methyl ethyl ketone, methanol, caustic soda and low sulphur marine fuel oil.
Nippon Paint Marine Coatings (Osaka)’s general manager sales and marketing Makoto Nakagawa, said “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.”
“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,” said Mr Nakagawa.
Nippon Paint Marine (Europe) technical manager Hiro Yamashita added “While NOA application improves coating quality and helps to reduce man hours 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 reduced 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 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.”
With the introduction of NOA PC 700, Nippon Paint Marine hopes to emulate the market success of its NOA60 HS product, which has been applied to the ballast tanks of more than 1,300 newbuild vessels since its introduction in 1998.
NOA60 HS is a superior grade pure epoxy formulated with special phenol-based resins to reinforce resistance to cracking especially on welds, providing greater resistance to saltwater and cathodic disbonding.
Applied in two coats at 160 µm per coat, NOA 60HS meets all PSPC acceptance criteria for water and cargo resistance, adhesion, cathodic disbondment, pinholes and undercutting. It is easy to clean and has low emissions of volatile organic compounds.
Suitable for multipurpose use, its enhanced resistance to freshwater and seawater has led to the system becoming the number one coating for ballast tanks and void space protection.
Safinah Group’s marine sector manager Alan Walker, will lead a session on coatings at the annual Tanker Shipping & Trade Conference & Awards in 26-29 November in London. Book your place now for the 2019 Tanker Shipping & Trade Conference, Awards and Exhibition.