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Characteristics of the rapid cure non-skid coating systems for the highly stressed area, exposed deck of the marine vessels were studied in order to establish an advanced coating system with higher cracking resistance. Some previous non-skid epoxy based coating systems for marine vessels suffered premature coating failure such as crack and delamination due to the lower fracture elongation of the coating accompanied with higher external stress.
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Pressurized Atlas Cell Testing is commonly understood to be an aggressive accelerated test for lining systems due the combination of pressure, temperature and a thermal gradient across the coating film known as the Cold Wall Effect. This is especially true when Carbon Dioxide (CO2) is added to the gas phase, as CO2 is miscible with oil and soluble in water. A familiar gas mix of 5% CO2, 5% Hydrogen Sulfide (H2S), and 90% Methane (CH4) are used in test protocols to simulate head space conditions of tanks and pressure vessels in oil and gas production conditions.
Antifouling coatings are a benefit to the environment because they reduce vessel drag which can increase fuel usage by as much as 86% and reduce the hull transport of nonindigenous species which may account for up to 70% of invertebrate invasive species in coastal waters. Copper-based antifouling coatings are used on over 90% of vessels in the world that have biofouling control coatings on their hulls.
Marine coating systems installed aboard commercial and military vessels are exposed to extremely aggressive environmental conditions during maritime operation. A key element in prolonging the useful life of any ship, both commercial and military, lies in the selection and installation of cost-effective corrosion control methods and materials at newbuild.
Nonskid coatings are typically used on the flight deck of aircraft carriers and high traffic areas of a ships’ deck. At this time, there are only a few approved materials available for use as nonskid coating for landing areas onboard US Navy vessels. Nonskid coating materials with improved performance, lower cost, and decreased maintenance are currently in development.
Protective coatings are used in anaerobic digesters to achieve both corrosion protection and gas tightness. With respect to the need for corrosion protection, anaerobic digesters, under typical operating conditions, do not create exposures which are corrosive to either carbon steel or concrete substrates. This paper will explain the basics of how anaerobic digesters work chemically to stabilize biosolids and demonstrate the atypical operating conditions under which corrosion becomes problematic.
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.
During military ship and offshore platform construction weight, International Maritime Organization (IMO) approvals, and VOC content are a prime consideration. There is a need of commercial products that can fulfill International Maritime Organization (IMO)/Safety of Life at Sea (SOLAS) and Qualified Product List (QPL) approvals, are lightweight, and contain no VOC, are environmentally friendly, and can be used for different applications
One of the pillars of the fourth industrial revolution (4IR) is to let machines make decisions on behalf of humans; this paper describes new technology that allows machines to decide inspection programs and field validation and testing of results. The technology described is a part of integrity management, and uses data, statistics and expert decisions to design inspection programs. These inspection programs are an important part of the safeguarding of equipment to maintain production and safety.This technology is a data-driven predictive model of material loss from corrosion, based on domain expert input and historical data in the form of non-destructive testing (NDT) tests. The technology trends is based on historical data and SME input, while accounting for uncertainties in NDT measurements, with uncertainties in historical trends and uncertainties in future trends. This produces a more realistic failure prediction to enhance existing RBIs and adds safety by improving on early detection of trends in data. In total, this enables the machine to update inspection plans autonomously, reducing the number of inspections significantly.The paper also describes how the technology can be developed further to use production data and integrity operating windows to improve predictions, deal with localised corrosion and assess if the test points on a corrosion circuit are sufficient, can be reduced in number or should be manually evaluated by adding more test points.
This paper considers the environmental and financial impact of various antifouling coatings for ships hulls. To do this comparison an eco-efficiency analysis was conducted comparing three different fouling control systems which offer the same customer benefit of a clean underwater hull. The results clearly demonstrated that fluoropolymer foul release technology can offer this benefit in the most eco efficient way having lower impacts on both the environment and on the economics of using that technology.
This standard practice provides a standardized method of measuring hull roughness to enable reproducible and comparable readings from similar gauges regardless of geographical location.
One of the factors affecting a ship's performance and fuel consumption is the roughness of its foul-free underwater hull. the Condition and type of paint system used may have a major influence on hull roughness and ship performance. Hull roughness has a major impact on vessel fuel efficiency and exhaust emissions. This standard focuses on the mechanical roughness of the hull.