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The appearance a coating provides can sometimes be just as important as is protective properties. Ever-growing budget concerns have increased the demand for coatings that provide a longer lasting aesthetic finish. This paper will explain the basic terminology, testing procedures, analytical instruments and specification development for coating color, gloss, reflectivity and other appearance parameters. The appearance characteristics of various coatings will also be discussed.
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The Sunshine Skyway Cable Stay Bridge is the signature bridge in the State of Florida. During 2004 the decision was made to repaint the stay cables for corrosion protection and aesthetic issues. The authors participated in a coatings condition assessment, plan development for refurbishing the coating system, and project execution. This paper identifies areas that made the Sunshine Skyway Bridge a challenging project such as: coatings condition assessment, paint specifications, access, containment system, execution, and final acceptance.
Industrial and marine protective coating systems are most commonly applied without incident and perform as expected over their anticipated service life. However, occasionally, a coating system will fail prematurely, for unexpected reasons, and with expensive consequences. This paper addresses those unexpected failures and provides reasons and remedies for such occurrences.
This paper will discuss various considerations that should be weighed when writing a specification to line a concrete tank, secondary containment or industrial floor.
The installation of linings to large diameter cooling pipes and penstocks is a major investment in hydroelectric and other power plants. The application should be performed in an expedient manner to minimize outage time and should last for many years (20 years or more) without the need for maintenance painting.
The authors look toward the future of specifying coating projects starting with the traditional prescriptive, means-and-methods, coating formula-based specifications. The popular qualified product list (QPL) approach is presented along with its drawbacks. The design/build (DB) ideal and limitations of specifying only performance is presented.
This paper describes concrete rehabilitation of the primary treatment process at the Fairfield-Suisun Sewer District Treatment Facility. The paper encompasses V&A’s initial concrete condition evaluation, coating specifications, and the warranty coating inspection. Notable items of discussion include coating selection, construction window, flow diversion schemes, and full-time coating inspection.
This group of authors, thinking outside the proverbial box, and with a mind to Shakespeare’s Macbeth, presented a paper at SSPC 2010 entitled “Hubble, Bubble, Tests and Trouble: The Dark Side of Misreading the Relevance of Coating Testing”. A challenge to the status quo of coatings performance testing, the paper boldly questioned much of the conventional wisdom surrounding coating testing and how that testing is interpreted.
Aside from the use of successful track records, it is commonplace for coating specifications to be written based upon test criteria deemed important by specification authorities. But are the tests relevant to the intended service environment? Or has the meaning of the test data been misinterpreted? Perhaps the tests have been ascribed a level of accuracy and dependency that the test method simply cannot deliver. These are vital factors to be considered if a coating specification is to be supported in a meaningful way and to prevent all sorts of problems.
Coating specifications frequently reference industry standards from organizations such as SSPC, ASTM, ISO and NACE. While specifications may reference a specific version or “year,” many simply state, “the latest version of the standard applies.” Many standards writing organizations require a review of the content of their documents every 5-years (or more frequently), and updates/revisions to standards can and oftentimes do occur. And new standards are developed and published to fill voids when a need for a standard is identified.
Microcosm is defined as “A community, place, or situation regarded as encapsulating in miniature the characteristics, qualities or features of something much larger”. By examining a “microcosm” one can look at how an overall system or market operates and infer assumptions and regard changes by looking at manageable data sets. This paper will examine a “microcosm” of the water tank recoat market. Data was collected from the website “Civcast USA”. The projects that were examined were water tank recoats in the Texas Market.
The paper will outline the following: 1. Process from when a customer approaches the polyurea supplier with a set of problems they need to overcome and the important issue of understanding what the customer and the job requirements really are. 2. How to evaluate and determine if the products you have available are suitable or not. 3. The process of having the customer write specifications based on what the applicator can realistically deliver and accomplish.