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Focusing on the invention of new measurement methods in order to analyze hull coating efficiency more precisely is one approach. However, it is possible to treat performance data from in-situ observations carried out at specified intervals onboard any vessel (over 10,000 dwt) by means of a data collection protocol.
Focusing on the invention of new measurement methods in order to analyze hull coating efficiency more precisely is one approach. However, it is possible to treat performance data from in-situ observations carried out at specified intervals onboard any vessel (over 10,000 dwt) by means of a data collection protocol. The data gathered from the existing monitors and weather observations onboard the ship are compared against the original sea trial data by means of advanced hydrodynamics analysis will result in reliable information regarding the additional power required to overcome fouling of the hull coating and thus lead to a more accurate assessment of the performance or efficiency of any hull coating. Rising fuel costs and new coating formulations call for better methods of evaluating the total cost of hull coatings (material costs, application costs and fuel penalties due to degradation of coating performance).
Current coating practice requires the thickness of anti-corrosion organic coatings to be over 250 for immersion parts of ships and offshore structures and the protective performance of these coatings has been evaluated by destructive and qualitative analysis. Recently, Electrochemical Impedance Spectroscopy (EIS) method has been employed, as an alternative, to evaluate corrosion resistance of organic coatings. This method is characterized as being nondestructive, reproducible, and quantitative in evaluating aging of organic coatings.
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The effects of three blasting methods utilised for surface preparation upon the behavior of five organic coating systems are investigated. The blasting methods include dry blast cleaning, UHP and UHPAB. It is shown that pull-off strength, pull-off failure mode, and delamination are significantly affected by the surface preparation method.
A new family of low viscosity MDI-based isocyanates has been developed for use in two component compositions for primer and protective coating applications. This new family of products shows excellent adhesion to a variety of substrates including concrete surfaces and wood. The products can be effectively applied on wet surfaces and compared to earlier products, have extended pot lifetimes.