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Traditionally, the light industrial/general maintenance paint systems involved a primer along with multiple coats of acrylic finish paint to achieve acceptable corrosion resistance over mild steel substrates. The new Direct-To-Metal (DTM) acrylic paints are formulated to eliminate the primer and perform as a primer and as a tough finish coat in a single paint, reducing the time and materials needed for complete coverage
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With increasing frequency cartridge-based technology is becoming the preferred method for touch-up and repair applications using high-solids coatings. Cartridge technology directly addresses many of the issues associated with batch mixing including pot life constraints, waste generation and off-ratio material proportioning/mixing. Recent data indicate there are substantial cost-savings and environmental benefits associated with cartridge use in comparison to conventional methods of touchup and repair.
The US Marine Corps (USMC) uses the various paints within the specifications that makeup the CARC system on their vehicles and weapon systems. Their use includes new system acquisition, field repair, major repaint activities and during complete system rebuild at the depots.
Zebra mussels were first introduced in the United States in the 1980’s into the Great Lakes. The migration of the mussels west prompted the US Bureau of Reclamation to examine technologies that might reduce their impact on water resources infrastructure. Many new materials and coating products have been developed to deter the attachment of mussels to infrastructure with new products being frequently introduced
When using cathodic protection on coated pipelines, end users must consider the problems that exist if the coating disbonds (loses adhesion). Many in the pipeline industry assume cathodic protection will solve their external corrosion problems without truly understanding the relationship between the coating and cathodic protection.
Concrete is one of the most durable construction materials available, but all too frequently we ignore its maintenance. Many of the techniques called "coating", "protection", and corrosion mitigation are, maintenance of concrete. The life span of concrete structures can be significantly extended by pro-actively addressing deterioration and durability issues through keeping water and other deleterious materials out of concrete after it has properly cured
Four separate concrete cooling towers at a coal fired electrical generation plant exhibited reinforcing steel corrosion causing concrete deterioration. The presentation will cover investigation of the corrosion sources, determination of the corrosion control solutions, implementation of the repair construction, and review of the corrosion measurements taken to prove effectiveness of the solution.
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.
Experiments to determine the critical pitting temperature of several alloys in calcium bromide solutions using the ASTM G150 electrochemical critical pitting test procedures. Similar experiments were also conducted in solutions containing equal concentrations (by weight) of chlorides and bromide.
Some of the toughest environments for protective coatings to withstand are seen in the power industry, particularly within the flue gas desulfurization (FGD) process. Temperatures within the different areas throughout the system may reach 350-450°F (177-232°C) and then be cooled to ambient temperatures upon shutdown of the unit.
This document captures the key components required to get Thermal spray aluminum (TSA) coating installed by material engineering, project design and execution. These execution details apply to any TSA and insulation system installation whether it is a new construction project or in-plant maintenance project.