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By establishing a holistic program that incorporates workforce training, the nation's first baccalaureate degree in Corrosion Engineering, and world-class research in corrosion and materials performance; The University of Akron (UA) is establishing a program that will create a pipeline of critical resources that will ensure that future investments in equipment and infrastructure revitalization are designed and implemented in a manner that minimizes the impact of corrosion and thus reduces the life-cycle cost to sustain those assets.
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The paint and coatings industry has witnessed significant change over the past 50 years. These changes have been driven by many factors including VOC mandates, safety concerns, advanced polymers and new demands of the end users and materials. One of those changes was the introduction of desiccant dehumidification to assist in the blast and coatings process of liquid storage tanks in 1983. The ability to indefinitely hold a blast by providing a dry climate mechanically set off the beginning of a technology that would continue to advance for years to come.
Existing US Navy Coefficient of Friction (CoF) meters are insensitive and cannot differentiate surfaces which have obvious differences in nonskid CoF. A new CoF meter, the m-Deck, was evaluated to determine CoF measurement effectiveness and temperature sensitivity. Both laboratory and field testing were performed over various nonskid systems at numerous temperatures. The results indicate that the m-Deck has significant temperature dependence, but also a high degree of accuracy. The collected data is used to establish acceptance criteria for newly installed nonskid.
During the testing of circular grit chambers in a wastewater treatment plant under construction, serious leaking problems were discovered prior to project completion. After meetings with the Owner, Design and Construction engineering firms, painting contractor and coatings manufacturer, the decision was made to apply 80 mils of pure polyurea to various concrete surfaces. This presentation, through the use of photo images taken during remediation, describes the nature of the problem and how it was solved.
Epoxy linings have long been the standard generic resin type when specifiers are selecting products for lining new steel potable water tanks or rehabilitating existing steel potable water storage tanks in North America. The one exception to this rule has been the Canadian potable water storage market. In Canada many specifiers have recognized the benefits offered by 100% Solids Elastomeric Polyurethane linings for 25+ years with admirable results.
In the mid-1990s, the US Navy’s technical community, led by Naval Sea Systems Command (NAVSEA), recognized existing coatings used to protect the inside of ships’ tanks were failing on average 5-8 years after application. The high cost to blast and recoat over 11,000 tanks every 5-8 years, not counting submarines and aircraft carriers, was prohibitive. To address this issue, the Navy conducted a study to analyze the problem and decided to replace these legacy coatings with high solid epoxy coatings.1
This presentation may contain forward-looking statements based on current assumptions and forecasts made by Covestro. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here.
Highly engineered PVDF (polyvinylidene fluoride) based coatings have evolved over the years to meet the specific requirements of market segments. Over 50 years ago, high temperature-baked PVDF based finishes were introduced to the architectural community to protect the metal components of skyscrapers, stadiums, and other landmark structures. The multi-decade service life and extreme weatherability of these coatings is attested to by outdoor Florida exposure and demonstrated by performance on structures worldwide.
This paper will present the results of an inspection conducted in 2007, nominally 20 years after the initial coating application. The inspection showed varied service lives associated with the different coating systems. Some of the systems were in excellent condition after 20 years while others had completely broken down.
For over 20 years OSHA has been working on getting a Construction Standard for Confined Spaces into the workplace and it has finally arrived. This paper will give a brief background on the standard development as well as go over the new standard and definition of what is a confined space.
Weathering performance of 2-component polyurethane topcoats used in corrosion protection applications, e.g. bridges, marine, stadiums, etc., is discussed with emphasis on some key formulating variables. Variables such as isocyanate index and resin selection are compared in an accelerated weathering study using various polyurethane topcoats. The results are referenced to SSPC polyurethane coating specifications which are often used in the industry to define performance criteria.
This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance.