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Presence of surface rust is normally assumed to decrease the performance of coatings. In this work various maintenance coatings were applied on pre-rusted steel cleaned by two different power tools: rotating disc and rotating steel brush.
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Coatings have been used as a primary method to protect the substrate underneath from corrosion in various geographical environments. A diverse range of generic coating types are available to protect the metals in different corrosive environments. Selection of the right coating for a specific metallic substrate at given operating conditions and environment is key to avoiding any premature failures of coating.
Corrosion under insulation (CUI) is a widespread corrosion phenomenon in many industries since it was first described in 1965. CUI generally occurs when moisture is retained within thermal insulation and metal interface and when the protective coating breaks down. Improper installation and eventual damage to metal jacketing act as an entry point for water. The rate of CUI can be further accelerated depending on the amount of leached corrosive species and the operating parameters.
Environments in oil and gas industries are often characterized by high temperature and pressure, harsh chemicals, humidity, extreme stress cycles, radiation, and mechanical disturbances.1,2 These extreme conditions degrade the ability of materials to perform, thus requiring enhanced protection through application of heavy-duty anti-corrosive and chemical resistant coatings that can withstand the aggressive environment.
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.
All ships need periodic maintenance, either onboard a FPSO, in a water ballast tank or a hull side of a marine vessel. When preparing for maintenance of such structures it has been standard practice to sandblast the surface. Sandblasting creates superb surfaces for coating application with ultimate cleanliness, but due to the dust generated by the process it is facing more local restrictions due to environmental impact and HSE.
Offshore wind farms are important contributions to the growing need for the generation of renewable energy. The number of offshore wind farms is growing, and multiple projects are under planning and construction around the world. One key element for a profitable and sustainable operation of offshore wind farms is that the installations are protected with the most cost-effective corrosion protective solution for the entire lifetime of the offshore wind farm. In practice, this means that today’s projects are planned with an estimated lifetime of a minimum of 35 years without major maintenance of the corrosion protective solution. To achieve this it is instrumental that the entire lifetime cost is considered when a corrosion protective solution is selected.
With growing concerns of climate change and carbon footprint, many companies and industries arelooking into ways to reduce their impact on the environment. For the coatings industry, this can beachieved by tackling a multitude of different sources that contribute to climate change such as energyconsumption, solvent emissions, and more. Recently, there have been more discussions on bio-basedraw materials and their contribution to meeting sustainability goals set by both resin and paintmanufacturers.
Horizontal directional drills (HDD) have become an essential pipeline construction tool for crossing spans of the right of way with obstructions such as wetlands, rivers and streams, railroads, roads, businesses, and high consequence areas (HCA). This trenchless technology allows a pipeline to be installed without open cutting the ground. Prior to any construction, geological surveys with core samples are performed to determine the optimum route for the HDD (Figure 1).