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For a coatings project to become a Successful Coatings Project, the coatings specification should be clear and concise to be useful to the intended audience. The contractor, the owner and any other parties should be able to find and understand key elements such as the scope, surface preparation (including the appropriate standards) and the specified coating or lining system with the approved alternates.
For a coatings project to become a Successful Coatings Project, the coatings specification should be clear and concise to be useful to the intended audience. The contractor, the owner and any other parties should be able to find and understand key elements such as the scope, surface preparation (including the appropriate standards) and the specified coating or lining system with the approved alternates. Unfortunately, many times these key elements are vague, incomplete or on the other end of the scale, overly complicated and restrictive to the point of not being useful to the people that are required to use them. These specification issues can prevent the project from being successful in providing the expected service life for the asset. This paper provides some examples of varying degrees of specifications and some guidance on producing a more applicable specification for a project.
Details of a new protocol for evaluating the effectiveness of coatings to reduce corrosion of steel structures is presented in this paper. Basic concepts of accelerated testing specified in American Society for Testing Materials (ASTM) standards and recent research investigations were used to develop a procedure that can provide conclusive results within 2400 hours of exposure as compared to more than 5000 hours in current practices.
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Reinforced concrete is the most common building material in water and wastewater treatment facilities. It is very common to see unprotected concrete in severely corrosive environments or corroding reinforcing steel that has been exposed due to construction defects or coating failures. The decision to coat new and existing concrete structures can be very difficult for owners due to the cost, turn-around times for putting structures back into service, and lack of confidence in certain protective coatings.
Accelerated corrosion test methods are regularly utilized in coating industries to predict the performance of coatings in real life exposure. The performance of coatings in these accelerated tests is a key step in the product development cycle. It is essential to understand different factors that may introduce variability in the test result.