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This paper on the use of Fourier transform infrared spectroscopy and instrumental determination using algorithm-based comparison of spectra is comprised of an orientation to the basics of instrument use and sample preparation, followed by a review of test programs and results of instrument-based spectra comparisons of numerous industrial coating types. The chemical molecular bonds associated with each coating type used to generically identify the coating types will be reviewed as background information.
The use of duplex coating systems (hot dip galvanizing or thermal spray coating with one or more liquid-applied coatings) for long term protection of structural steel is becoming more mainstream in many industries. This paper describes the advantages of employing duplex coating systems as well as some important considerations for designers prior to specifying their use. It also highlights an ongoing initiative to help agencies more efficiently and effectively use duplex coatings on steel bridges by developing guidelines, standards, and other materials.
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The role of a Coating Inspector has evolved considerably over the past few decades, and the responsibilities have increased over what used to be a rather straightforward job: to verify that surface preparation and coating application meet the project specification requirements. Today there are week-long or multi-week basic and advanced coating inspection courses, specialty courses that are industry-specific (e.g., bridge, nuclear), courses that are substrate-specific (e.g., concrete coatings inspection) and even coating-specific (e.g., inspection of thermal spray coatings).
Being proactive and performing scheduled coating condition assessments on above ground storage tanks to prevent corrosion is of utmost importance to protect assets. Undetected corrosion can result in product contamination, section loss, create compliance issues resulting in fines levied by governmental agencies, and increase costs of asset replacement. Planned and detailed coating/lining condition assessments can help a tank owner realize the current condition of their assets and maximize life expectancy.