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Protective coatings based on waterborne acrylic technology have been used in the design, construction and maintenance of commercial and industrial structures for over four decades, and the types of applications where they are used, their formulation, and performance have evolved during that time period. Driven by the ability to meet environmental regulations, their ease of use, and improvements in performance, the utilization of waterborne acrylics has also grown over the years.
Protective coatings based on waterborne acrylic technology have been used in the design, construction and maintenance of commercial and industrial structures for over four decades, and the types of applications where they are used, their formulation, and performance have evolved during that time period. Driven by the ability to meet environmental regulations, their ease of use, and improvements in performance, the utilization of waterborne acrylics has also grown over the years. This paper will take a look both backward and forward in time to see how far waterborne acrylics have advanced, the challenges overcome and remaining to be conquered, and some predictions on where the technology is headed. This objective will be accomplished through a retrospective examination of lab and field studies over steel, concrete and other substrates to demonstrate how the evolution of raw materials and formulations have led to improved performance and environmental profiles in current state-of-the-art products, as well as a discussion of new developments and what they mean for the future of waterborne acrylic protective coatings.
Aromatic polyurethane coatings are often used in the protection of steel water pipelines from corrosion. Unfortunately, pipeline sections may be stored above ground for many months before installation so the coatings yellow, lose gloss and can chalk. This deterioration in appearance naturally creates doubt about the corrosion protective qualities of the coatings.
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The intent of this presentation will be to briefly analyze the evolution of the steel surface preparation market by focusing on three common methods for steel surface preparation used today (i.e., dry abrasive blasting, wet abrasive blasting and ultra-high-pressure blasting (UHP)) and the effects of water and additives on cleanliness, degree of surface preparation, coating integrity and coating adhesion. This presentation will include test results comparing the effects and results of different forms of surface preparation and the resulting coating application characteristics.
With more stringent silica regulations being enforced, wet abrasive blasting is becoming more prevalent in the industry. We investigated the viability of wet abrasive blasting as compared to the more commonly used dry abrasive blast. One added benefit of wet abrasive blasting is the removal of soluble salts in addition to providing the specified profile.