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There are many factors to consider when optimizing your coating system for corrosion resistance. Waterborne coatings present a unique challenge due to their inherent hydrophilic nature and ability to readily conduct electrons. Waterborne resin technology has evolved greatly since its inception. If formulated properly one is able to meet and or exceed the performance of their solvent borne counterparts.
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This paper will address conditions assessment, test procedures and criteria necessary to make informed decisions on overcoating or not overcoating an aged coating system. It will cover rating of adhesion and film integrity, determination of overcoating risk factors and a selection process for appropriate overcoat systems.
Painted aluminum extrusions are a common architectural material used in the manufacture of windows and door frames. The applied coatings, typically in a shop atmosphere, may not always work once installed in the field due to a variety of fabrication defects and or exposures.
Because process shutdowns are expensive, it is desirable to speed up the turn-around time when applying protective coating systems on concrete. Rapid installation of surfacing materials on concrete can be problematical due to inadequate surface preparation, residual moisture, low surface tensile strength, and poor compatibility between the concrete substrate repair materials and the protective coating system.
The nuclear renaissance that is emerging in the United States will be based on new power plant designs from a variety of US and international sources. While the new plant designs will be based on the time tested and proven concepts of both the boiling water reactor (BWR) and the pressurized water reactor (PWR), the emphasis of the new plants will be on engineering designs that incorporate increased levels of redundancy in safety systems, and post-LOCA passive systems to move fluids about the reactor containment, thereby providing for long-term core cooling and decay heat removal, The new plant designs will include a strong emphasis on modular, off-site construction where more protective coatings will be applied in the fabrication shop.
Vapor/wet blasting is proving to be an attractive method for surface preparation of steel, concrete, wood and other substrates. By using just enough media and water to suppress dust and achieve the desired production rates, Vapor Abrasive® blasting avoids the dusty side effects of dry blasting and the messy runoff generated by wet blasting. To achieve optimal results in Vapor Abrasive® blasting, the system must be properly matched for the job at hand.
Occasionally, the protective coatings on a structure reach a life span of 20 years. Quite often when this happens, one of the companies involved in the project, either the coating supplier or coating applicator, will publish pictures of the bridge or tank in a trade magazine as if the project was a great achievement. If instead, we accept the premise that most of the resins used to manufacture protective coatings easily remain stable for 20 years, we should ask ourselves the question, “why aren’t all of the coating systems lasting 20 years?”
In the 1920's the Ford Motor Company commissioned architect Albert Kahn to design regional automobile assembly plants. The largest on the West Coast was built in Richmond CA. With over 500,000 square feet of floor space under one roof it is still today the largest single building on San Francisco Bay. During the 1989 Loma Prieta earthquake this National Historic Building was severely damaged to the point that it could not be occupied. This paper tells the tale of how due to incredible time restraints an Olympian effort was needed to retrofit and restore this national treasure to a usable commercial building.
Selection of coating systems for commercial projects may appear to be a simple task, but to ensure a successful project the Architect or the Engineer needs to perform a thorough and appropriate evaluation of the project to match the right coating systems with the required substrates and environments.
This paper will discuss issues related to corrosion protection of high temperature carbon steel substrates which are insulated to preserve energy, provide process control and to keep workers safe from burn injuries.
This paper will provide information on current SSPC training and certification programs related to industry standards and practical aspects of selecting, specifying, and using coatings safely, effectively and economically to protect structures in harsh marine environments.
This paper will provide information on the standards used in evaluating and determining correct application and selection of protective coatings and linings used in the wastewater industry. It will also highlight certification that can be used in evaluating contractors and inspection companies used in the coating and lining process.